[ { "sku": "YAR-203-12-2F", "brand": "SKF", "manufacturer_designation": "YAR 203/12-2F", "series": "YAR2-series", "type": "insert", "d_mm": 12, "D_mm": 40, "B_mm": 27.4, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 9.56, "static_load_kN": 4.75, "fatigue_load_limit_kN": 0.2, "limiting_speed_rpm": 9500, "max_rpm": 9500, "weight_g": 120, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 203/12-2F is a SKF insert bearing (Y-bearing) for a 12 mm shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 40 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the slash tail names a non-standard metric bore directly: YAR 203/12 is the 12 mm bore execution of the size series. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 12x40x27.4 mm (0.472x1.575x1.079 in), outer ring 12 mm wide, C 9.56 kN, C0 4.75 kN, Pu 0.2 kN. The catalogue publishes a single speed ceiling, the limiting speed: 9,500 r/min; mass 120 g. Mass-to-load ratio for YAR-203-12-2F: 12.552 g of catalogue mass per rated kN of C, and 10 g per millimetre of bore — useful when comparing executions of the same 12x40 mm envelope on the drawing. Outer-vs-overall width: the outer ring is 12 mm wide inside the 27.4 mm total, so the extended inner ring accounts for 0.562 of the overall width (7.7 mm of axial projection per side). Bore-to-OD planning: OD 40 over bore 12 is a 3.333x step, while bore/overall-width gives 0.438; the spherical seat in the matching Y-housing must be specified to the 40 mm OD, not to a cylindrical housing bore. Rating split for the maintenance file: dynamic 9.56 kN (L10), static 4.75 kN (s0 shock check), fatigue 0.2 kN (adjusted life) — three separate uses for YAR 203/12-2F, none interchangeable with another. Fillet discipline: the printed r_min 0.3 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 12x40 mm insert on its chamfer tilts the whole spherical seat. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Service tip for YAR-203-12-2F: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 14 mm radial section.", "applications": [ "textile machinery rollers", "small agricultural augers", "fan and blower pillow blocks" ], "failure_modes": [ "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "Do not specify the 12 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 15.9 mm s1 dimension is the screw seating geometry inside the 15.4 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Catalogue ratings belong to YAR 203/12-2F as the grub two f execution; other order numbers of the YAR 203/12 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-203-12-2F?", "a": "Boundary dimensions: bore 12 mm, sphered OD 40 mm, overall width 27.4 mm; weight 120 g. Loads: dynamic 9.56 kN, static 4.75 kN, fatigue 0.2 kN; the only published speed is the 9,500 r/min limiting value." }, { "q": "What does the designation YAR 203/12-2F mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the slash tail names a non-standard metric bore directly: YAR 203/12 is the 12 mm bore execution of the size series. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAR", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-203-12-2F", "YAR 203/12-2F" ], "locale_variants": {} }, { "sku": "YAR-203-15-2F", "brand": "SKF", "manufacturer_designation": "YAR 203/15-2F", "series": "YAR2-series", "type": "insert", "d_mm": 15, "D_mm": 40, "B_mm": 27.4, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 9.56, "static_load_kN": 4.75, "fatigue_load_limit_kN": 0.2, "limiting_speed_rpm": 9500, "max_rpm": 9500, "weight_g": 110, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 203/15-2F is a SKF insert bearing (Y-bearing) for a 15 mm shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 40 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the slash tail names a non-standard metric bore directly: YAR 203/15 is the 15 mm bore execution of the size series. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 15x40x27.4 mm (0.591x1.575x1.079 in), outer ring 12 mm wide, C 9.56 kN, C0 4.75 kN, Pu 0.2 kN. The catalogue publishes a single speed ceiling, the limiting speed: 9,500 r/min; mass 110 g. Bore-to-OD planning: OD 40 over bore 15 is a 2.667x step, while bore/overall-width gives 0.547; the spherical seat in the matching Y-housing must be specified to the 40 mm OD, not to a cylindrical housing bore. Capacity density: 9.56 kN from 0.110 kg of bearing steel is about 86.909 kN per kilogram, and per width millimetre the 27.4 mm unit carries 0.349 kN of dynamic capacity. Mass-to-load ratio for YAR-203-15-2F: 11.506 g of catalogue mass per rated kN of C, and 7.333 g per millimetre of bore — useful when comparing executions of the same 15x40 mm envelope on the drawing. Static-first planning: the 0.173 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 15 mm shaft, not the 9.56 kN L10 value. Grease-life arithmetic is dominated by speed: at dn approx 2.61x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Set-screw geometry on this size: the two 120 deg screws bear on the 15 mm shaft inside the 27.4 mm total width while the outer ring is only 12 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "textile machinery rollers", "fan and blower pillow blocks", "light conveyors and small belt take-ups" ], "failure_modes": [ "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "The 15.9 mm s1 dimension is the screw seating geometry inside the 15.4 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 15 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 9.56/4.75 kN figures belong specifically to YAR 203/15-2F; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-203-15-2F?", "a": "Boundary dimensions: bore 15 mm, sphered OD 40 mm, overall width 27.4 mm; weight 110 g. Loads: dynamic 9.56 kN, static 4.75 kN, fatigue 0.2 kN; the only published speed is the 9,500 r/min limiting value." }, { "q": "What does the designation YAR 203/15-2F mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the slash tail names a non-standard metric bore directly: YAR 203/15 is the 15 mm bore execution of the size series. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "How do the set screws lock the 15 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." } ], "cross_ref": [ { "equiv_sku": "YAR", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-203-15-2F", "YAR 203/15-2F" ], "locale_variants": {} }, { "sku": "YAT-203", "brand": "SKF", "manufacturer_designation": "YAT 203", "series": "YAR2-series", "type": "insert", "d_mm": 17, "D_mm": 40, "B_mm": 22.1, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 9.56, "static_load_kN": 4.75, "fatigue_load_limit_kN": 0.2, "limiting_speed_rpm": 9500, "max_rpm": 9500, "weight_g": 80, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAT 203 is a grub-screw insert bearing with the inner ring extended on one side, 17x40x22.1 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAT is SKF's grub-screw insert design — a single extended inner-ring side housing the two 120 deg set screws. the size code 203 carries the usual bore arithmetic — 17 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units. Envelope 17x40x22.1 mm (0.669x1.575x0.87 in), outer ring 12 mm wide, C 9.56 kN, C0 4.75 kN, Pu 0.2 kN. The catalogue publishes a single speed ceiling, the limiting speed: 9,500 r/min; mass 80 g. Load balance for documentation: C0 4.75 kN against C 9.56 kN gives a 0.497 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Speed ceiling of 9,500 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Pitch-diameter arithmetic: dm = (17+40)/2 = 28.5 mm; at the 9,500 r/min limiting speed the ball set runs at dn approx 2.71x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Envelope arithmetic: the radial section from 17 mm bore to 40 mm OD is 11.5 mm; dividing C 9.56 kN by that section gives 0.831 kN per section millimetre, and the 22.1 mm overall width is 1.922x the section. Outer-vs-overall width: the outer ring is 12 mm wide inside the 22.1 mm total, so the extended inner ring accounts for 0.457 of the overall width (10.1 mm of axial projection on the locking side). Single-extension fitting note: with the inner ring extended only on the locking side, orient the open (non-extended) face toward the shaft step or housing shoulder as the drawing shows — reversed, the set screws end up unsupported by the abutment and the shortened side offers no seal land at all. Set-screw geometry on this size: the two 120 deg screws bear on the 17 mm shaft inside the 22.1 mm total width while the outer ring is only 12 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "light conveyors and small belt take-ups", "small agricultural augers", "textile machinery rollers" ], "failure_modes": [ "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "Do not specify the 17 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 15.9 mm s1 dimension is the screw seating geometry inside the 10.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a one-side YAT insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Catalogue ratings belong to YAT 203 as the grub one open execution; other order numbers of the YAT 203 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAT-203?", "a": "The catalogue envelope is 17x40x22.1 mm with a spherical outside surface; mass 80 g. Ratings C 9.56/4.75 kN, Pu 0.2 kN, limiting speed 9,500 r/min." }, { "q": "What does the designation YAT 203 mean?", "a": "YAT is SKF's grub-screw insert design — a single extended inner-ring side housing the two 120 deg set screws. the size code 203 carries the usual bore arithmetic — 17 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAT", "equiv_brand": "ISO 15", "level": "full", "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAT-203", "YAT 203" ], "locale_variants": {} }, { "sku": "YAR-203-2F", "brand": "SKF", "manufacturer_designation": "YAR 203-2F", "series": "YAR2-series", "type": "insert", "d_mm": 17, "D_mm": 40, "B_mm": 27.4, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 9.56, "static_load_kN": 4.75, "fatigue_load_limit_kN": 0.2, "limiting_speed_rpm": 9500, "max_rpm": 9500, "weight_g": 100, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 203-2F is a SKF insert bearing (Y-bearing) for a 17 mm shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 40 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 203 carries the usual bore arithmetic — 17 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 17x40x27.4 mm (0.669x1.575x1.079 in), outer ring 12 mm wide, C 9.56 kN, C0 4.75 kN, Pu 0.2 kN. The catalogue publishes a single speed ceiling, the limiting speed: 9,500 r/min; mass 100 g. Mass-to-load ratio for YAR-203-2F: 10.46 g of catalogue mass per rated kN of C, and 5.882 g per millimetre of bore — useful when comparing executions of the same 17x40 mm envelope on the drawing. Width accounting on this execution: 27.4 mm overall and 12 mm outer-ring width leave the housing designer 15.4 mm of inner-ring projection to accommodate the locking arrangement. Pitch-diameter arithmetic: dm = (17+40)/2 = 28.5 mm; at the 9,500 r/min limiting speed the ball set runs at dn approx 2.71x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Fillet discipline: the printed r_min 0.3 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 17x40 mm insert on its chamfer tilts the whole spherical seat. Rating split for the maintenance file: dynamic 9.56 kN (L10), static 4.75 kN (s0 shock check), fatigue 0.2 kN (adjusted life) — three separate uses for YAR 203-2F, none interchangeable with another. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Service tip for YAR-203-2F: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 11.5 mm radial section.", "applications": [ "textile machinery rollers", "small agricultural augers", "fan and blower pillow blocks" ], "failure_modes": [ "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 15.9 mm s1 dimension is the screw seating geometry inside the 15.4 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 17 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Ordering discipline for the 17 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-203-2F?", "a": "Boundary dimensions: bore 17 mm, sphered OD 40 mm, overall width 27.4 mm; weight 100 g. Loads: dynamic 9.56 kN, static 4.75 kN, fatigue 0.2 kN; the only published speed is the 9,500 r/min limiting value." }, { "q": "What does the designation YAR 203-2F mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 203 carries the usual bore arithmetic — 17 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." } ], "cross_ref": [ { "equiv_sku": "YAR", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-203-2F", "YAR 203-2F" ], "locale_variants": {} }, { "sku": "YAT-204", "brand": "SKF", "manufacturer_designation": "YAT 204", "series": "YAR2-series", "type": "insert", "d_mm": 20, "D_mm": 47, "B_mm": 25.5, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 12.7, "static_load_kN": 6.55, "fatigue_load_limit_kN": 0.28, "limiting_speed_rpm": 8500, "max_rpm": 8500, "weight_g": 130, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAT 204 is a SKF insert bearing (Y-bearing) for a 20 mm shaft: grub-screw insert bearing with the inner ring extended on one side, built to the ISO 15 diameter-series envelope with a sphered OD of 47 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAT basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAT carries the one-side-extended inner ring. the size code 204 carries the usual bore arithmetic — 20 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. with no -2F/-2RF suffix the order number denotes the open external execution of the YAR2 size — add external exclusion at the housing and plan relubrication intervals for dusty or wet surroundings. Envelope 20x47x25.5 mm (0.787x1.85x1.004 in), outer ring 14 mm wide, C 12.7 kN, C0 6.55 kN, Pu 0.28 kN. The catalogue publishes a single speed ceiling, the limiting speed: 8,500 r/min; mass 130 g. Static-first planning: the 0.257 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 20 mm shaft, not the 12.7 kN L10 value. Grease-life arithmetic is dominated by speed: at dn approx 2.85x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Fillet discipline: the printed r_min 0.6 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 20x47 mm insert on its chamfer tilts the whole spherical seat. Pitch-diameter arithmetic: dm = (20+47)/2 = 33.5 mm; at the 8,500 r/min limiting speed the ball set runs at dn approx 2.85x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Capacity density: 12.7 kN from 0.130 kg of bearing steel is about 97.692 kN per kilogram, and per width millimetre the 25.5 mm unit carries 0.498 kN of dynamic capacity. Single-extension fitting note: with the inner ring extended only on the locking side, orient the open (non-extended) face toward the shaft step or housing shoulder as the drawing shows — reversed, the set screws end up unsupported by the abutment and the shortened side offers no seal land at all. Service tip for YAT-204: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 13.5 mm radial section.", "applications": [ "light conveyors and small belt take-ups", "fan and blower pillow blocks", "small agricultural augers" ], "failure_modes": [ "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "The 18.3 mm s1 dimension is the screw seating geometry inside the 11.5 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a one-side YAT insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 20 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 12.7/6.55 kN figures belong specifically to YAT 204; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAT-204?", "a": "Boundary dimensions: bore 20 mm, sphered OD 47 mm, overall width 25.5 mm; weight 130 g. Loads: dynamic 12.7 kN, static 6.55 kN, fatigue 0.28 kN; the only published speed is the 8,500 r/min limiting value." }, { "q": "What does the designation YAT 204 mean?", "a": "reading the YAT basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAT carries the one-side-extended inner ring. the size code 204 carries the usual bore arithmetic — 20 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. with no -2F/-2RF suffix the order number denotes the open external execution of the YAR2 size — add external exclusion at the housing and plan relubrication intervals for dusty or wet surroundings." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAT", "equiv_brand": "ISO 15", "level": "full", "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAT-204", "YAT 204" ], "locale_variants": {} }, { "sku": "YAR-204-2RF-HV", "brand": "SKF", "manufacturer_designation": "YAR 204-2RF/HV", "series": "YAR2-series", "type": "insert", "d_mm": 20, "D_mm": 47, "B_mm": 31, "material": "SS440C", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 10.8, "static_load_kN": 6.55, "fatigue_load_limit_kN": 0.28, "limiting_speed_rpm": 5000, "max_rpm": 5000, "weight_g": 150, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAR 204-2RF/HV is a grub-screw insert bearing with the inner ring extended on both sides, 20x47x31 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. the size code 204 carries the usual bore arithmetic — 20 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. HV is the corrosion-resistant food-range variant of the -2RF sealed design — stainless parts plus food-compatible rubber and lubricant, which also explains its lower published C and limiting speed. Envelope 20x47x31 mm (0.787x1.85x1.22 in), outer ring 14 mm wide, C 10.8 kN, C0 6.55 kN, Pu 0.28 kN. The catalogue publishes a single speed ceiling, the limiting speed: 5,000 r/min; mass 150 g. At the printed limiting speed of 5,000 r/min the mean diameter dm = 33.5 mm implies dn about 1.68x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Rating split for the maintenance file: dynamic 10.8 kN (L10), static 6.55 kN (s0 shock check), fatigue 0.28 kN (adjusted life) — three separate uses for YAR 204-2RF/HV, none interchangeable with another. Static-first planning: the 0.211 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 20 mm shaft, not the 10.8 kN L10 value. Fatigue-limit check: Pu 0.28 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YAR 204-2RF/HV — most belt-driven mounted-unit loads sit comfortably under 2.593 % of C. Mass-to-load ratio for YAR-204-2RF-HV: 13.889 g of catalogue mass per rated kN of C, and 7.5 g per millimetre of bore — useful when comparing executions of the same 20x47 mm envelope on the drawing. Stainless food-range note: HV parts trade some capacity for corrosion resistance and food-compatible lubrication, and the printed limiting speed is set for that fill; do not top up with ordinary mineral grease in service — mixing greases can harden the food-grade fill and seize the seals. Set-screw geometry on this size: the two 120 deg screws bear on the 20 mm shaft inside the 31 mm total width while the outer ring is only 14 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "small agricultural augers", "fan and blower pillow blocks", "textile machinery rollers" ], "failure_modes": [ "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 20 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 18.3 mm s1 dimension is the screw seating geometry inside the 17 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Ordering discipline for the 20 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-204-2RF-HV?", "a": "The catalogue envelope is 20x47x31 mm with a spherical outside surface; mass 150 g. Ratings C 10.8/6.55 kN, Pu 0.28 kN, limiting speed 5,000 r/min." }, { "q": "What does the designation YAR 204-2RF/HV mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. the size code 204 carries the usual bore arithmetic — 20 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. HV is the corrosion-resistant food-range variant of the -2RF sealed design — stainless parts plus food-compatible rubber and lubricant, which also explains its lower published C and limiting speed." }, { "q": "How do the set screws lock the 20 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." } ], "cross_ref": [ { "equiv_sku": "YAR-204-2RFGR-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 20x47x31 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 204-2RFGR/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YARAG-204", "equiv_brand": "SKF", "level": "partial", "note": "Same 20x47x31 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (10.8/6.55 kN vs 12.7/6.55 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-204-2RF", "equiv_brand": "SKF", "level": "partial", "note": "Same 20x47x31 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (10.8/6.55 kN vs 12.7/6.55 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-204-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 20x47x31 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (10.8/6.55 kN vs 12.7/6.55 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-204-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 20x47x31 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (10.8/6.55 kN vs 12.7/6.55 kN) — envelope match, not a load-rating equivalent." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-204-2RF-HV", "YAR 204-2RF/HV" ], "locale_variants": {} }, { "sku": "YAR-204-2RFGR-HV", "brand": "SKF", "manufacturer_designation": "YAR 204-2RFGR/HV", "series": "YAR2-series", "type": "insert", "d_mm": 20, "D_mm": 47, "B_mm": 31, "material": "SS440C", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 10.8, "static_load_kN": 6.55, "fatigue_load_limit_kN": 0.28, "limiting_speed_rpm": 5000, "max_rpm": 5000, "weight_g": 150, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YAR 204-2RFGR/HV is SKF's 20 mm-bore grub-screw insert bearing with the inner ring extended on both sides in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 20x47x31 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the size code 204 carries the usual bore arithmetic — 20 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. /HV identifies the stainless-steel, food-industry execution: stainless bearing components, food-compatible rubber in the seal/flinger set and food-grade grease fill — the catalogue ratings are correspondingly below the standard steel version, and the GR marking adds the lubrication groove in the sphered outside surface on the locking side. Envelope 20x47x31 mm (0.787x1.85x1.22 in), outer ring 14 mm wide, C 10.8 kN, C0 6.55 kN, Pu 0.28 kN. The catalogue publishes a single speed ceiling, the limiting speed: 5,000 r/min; mass 150 g. Fillet discipline: the printed r_min 0.6 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 20x47 mm insert on its chamfer tilts the whole spherical seat. Mass-to-load ratio for YAR-204-2RFGR-HV: 13.889 g of catalogue mass per rated kN of C, and 7.5 g per millimetre of bore — useful when comparing executions of the same 20x47 mm envelope on the drawing. Outer-vs-overall width: the outer ring is 14 mm wide inside the 31 mm total, so the extended inner ring accounts for 0.548 of the overall width (8.5 mm of axial projection per side). Load balance for documentation: C0 6.55 kN against C 10.8 kN gives a 0.606 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Rating split for the maintenance file: dynamic 10.8 kN (L10), static 6.55 kN (s0 shock check), fatigue 0.28 kN (adjusted life) — three separate uses for YAR 204-2RFGR/HV, none interchangeable with another. Stainless food-range note: HV parts trade some capacity for corrosion resistance and food-compatible lubrication, and the printed limiting speed is set for that fill; do not top up with ordinary mineral grease in service — mixing greases can harden the food-grade fill and seize the seals. Set-screw geometry on this size: the two 120 deg screws bear on the 20 mm shaft inside the 31 mm total width while the outer ring is only 14 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "textile machinery rollers", "fan and blower pillow blocks", "light conveyors and small belt take-ups" ], "failure_modes": [ "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "The 18.3 mm s1 dimension is the screw seating geometry inside the 17 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 20 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 10.8/6.55 kN figures belong specifically to YAR 204-2RFGR/HV; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-204-2RFGR-HV?", "a": "YAR 204-2RFGR/HV measures 20 mm bore x 47 mm OD x 31 mm overall width (outer ring 14 mm wide), 0.787 x 1.85 x 1.22 in; mass about 150 g. SKF 17000 ratings: C 10.8 kN, C0 6.55 kN, Pu 0.28 kN, limiting speed 5,000 r/min." }, { "q": "What does the designation YAR 204-2RFGR/HV mean?", "a": "the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the size code 204 carries the usual bore arithmetic — 20 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. /HV identifies the stainless-steel, food-industry execution: stainless bearing components, food-compatible rubber in the seal/flinger set and food-grade grease fill — the catalogue ratings are correspondingly below the standard steel version, and the GR marking adds the lubrication groove in the sphered outside surface on the locking side." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAR-204-2RF-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 20x47x31 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 204-2RF/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YARAG-204", "equiv_brand": "SKF", "level": "partial", "note": "Same 20x47x31 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (10.8/6.55 kN vs 12.7/6.55 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-204-2RF", "equiv_brand": "SKF", "level": "partial", "note": "Same 20x47x31 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (10.8/6.55 kN vs 12.7/6.55 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-204-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 20x47x31 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (10.8/6.55 kN vs 12.7/6.55 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-204-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 20x47x31 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (10.8/6.55 kN vs 12.7/6.55 kN) — envelope match, not a load-rating equivalent." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-204-2RFGR-HV", "YAR 204-2RFGR/HV" ], "locale_variants": {} }, { "sku": "YARAG-204", "brand": "SKF", "manufacturer_designation": "YARAG 204", "series": "YAR2-series", "type": "insert", "d_mm": 20, "D_mm": 47, "B_mm": 31, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 12.7, "static_load_kN": 6.55, "fatigue_load_limit_kN": 0.28, "limiting_speed_rpm": 1800, "max_rpm": 1800, "weight_g": 150, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YARAG 204 is a SKF insert bearing (Y-bearing) for a 20 mm shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 47 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 204 carries the usual bore arithmetic — 20 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the AG suffix identifies the farm-duty variant of the range: sealed and flinger-protected for chaff and dust, with the catalogue deliberately derating its permissible speed versus the industrial execution. Envelope 20x47x31 mm (0.787x1.85x1.22 in), outer ring 14 mm wide, C 12.7 kN, C0 6.55 kN, Pu 0.28 kN. The catalogue publishes a single speed ceiling, the limiting speed: 1,800 r/min; mass 150 g. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 28.2 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the inner flinger. Grease-life arithmetic is dominated by speed: at dn approx 0.60x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the AG variant caps speed so aggressively, and high-temperature mounts shorten both even when load is light. At the printed limiting speed of 1,800 r/min the mean diameter dm = 33.5 mm implies dn about 0.60x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Spherical-seat note in numbers: the 47 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 33.5 = 105.243 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Pitch-diameter arithmetic: dm = (20+47)/2 = 33.5 mm; at the 1,800 r/min limiting speed the ball set runs at dn approx 0.60x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Set-screw geometry on this size: the two 120 deg screws bear on the 20 mm shaft inside the 31 mm total width while the outer ring is only 14 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "small agricultural augers", "fan and blower pillow blocks", "textile machinery rollers" ], "failure_modes": [ "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "The 18.3 mm s1 dimension is the screw seating geometry inside the 17 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 20 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 12.7/6.55 kN figures belong specifically to YARAG 204; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YARAG-204?", "a": "Boundary dimensions: bore 20 mm, sphered OD 47 mm, overall width 31 mm; weight 150 g. Loads: dynamic 12.7 kN, static 6.55 kN, fatigue 0.28 kN; the only published speed is the 1,800 r/min limiting value." }, { "q": "What does the designation YARAG 204 mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 204 carries the usual bore arithmetic — 20 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the AG suffix identifies the farm-duty variant of the range: sealed and flinger-protected for chaff and dust, with the catalogue deliberately derating its permissible speed versus the industrial execution." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAR-204-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 20x47x31 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (12.7/6.55 kN vs 10.8/6.55 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-204-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 20x47x31 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (12.7/6.55 kN vs 10.8/6.55 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-204-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 20x47x31 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 204-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-204-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 20x47x31 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 204-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-204-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 20x47x31 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 204-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YARAG-204", "YARAG 204" ], "locale_variants": {} }, { "sku": "YAR-204-2RF", "brand": "SKF", "manufacturer_designation": "YAR 204-2RF", "series": "YAR2-series", "type": "insert", "d_mm": 20, "D_mm": 47, "B_mm": 31, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 12.7, "static_load_kN": 6.55, "fatigue_load_limit_kN": 0.28, "limiting_speed_rpm": 5000, "max_rpm": 5000, "weight_g": 150, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAR 204-2RF is a grub-screw insert bearing with the inner ring extended on both sides, 20x47x31 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. the size code 204 carries the usual bore arithmetic — 20 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2RF external design combines contact nitrile seals with rubberized additional flingers on both sides for a tighter labyrinth than the plain-flinger -2F execution. Envelope 20x47x31 mm (0.787x1.85x1.22 in), outer ring 14 mm wide, C 12.7 kN, C0 6.55 kN, Pu 0.28 kN. The catalogue publishes a single speed ceiling, the limiting speed: 5,000 r/min; mass 150 g. The s1 18.3 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Bore-to-OD planning: OD 47 over bore 20 is a 2.35x step, while bore/overall-width gives 0.645; the spherical seat in the matching Y-housing must be specified to the 47 mm OD, not to a cylindrical housing bore. Grease-life arithmetic is dominated by speed: at dn approx 1.68x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Load balance for documentation: C0 6.55 kN against C 12.7 kN gives a 0.516 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Rating split for the maintenance file: dynamic 12.7 kN (L10), static 6.55 kN (s0 shock check), fatigue 0.28 kN (adjusted life) — three separate uses for YAR 204-2RF, none interchangeable with another. Rubberized-flinger note: the -2RF coated throwers are vulcanized assemblies — never lever or hammer against the flinger when mounting, and press only on the inner ring when the bearing is fitted loose before the housing cap closes, or the flinger lip folds inward and grinds on the inner ring. Set-screw geometry on this size: the two 120 deg screws bear on the 20 mm shaft inside the 31 mm total width while the outer ring is only 14 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "light conveyors and small belt take-ups", "textile machinery rollers", "small agricultural augers" ], "failure_modes": [ "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "The 18.3 mm s1 dimension is the screw seating geometry inside the 17 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 20 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 12.7/6.55 kN figures belong specifically to YAR 204-2RF; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-204-2RF?", "a": "The catalogue envelope is 20x47x31 mm with a spherical outside surface; mass 150 g. Ratings C 12.7/6.55 kN, Pu 0.28 kN, limiting speed 5,000 r/min." }, { "q": "What does the designation YAR 204-2RF mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. the size code 204 carries the usual bore arithmetic — 20 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2RF external design combines contact nitrile seals with rubberized additional flingers on both sides for a tighter labyrinth than the plain-flinger -2F execution." }, { "q": "How do the set screws lock the 20 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." } ], "cross_ref": [ { "equiv_sku": "YAR-204-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 20x47x31 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (12.7/6.55 kN vs 10.8/6.55 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-204-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 20x47x31 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (12.7/6.55 kN vs 10.8/6.55 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YARAG-204", "equiv_brand": "SKF", "level": "full", "note": "Same 20x47x31 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 204 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-204-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 20x47x31 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 204-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-204-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 20x47x31 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 204-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-204-2RF", "YAR 204-2RF" ], "locale_variants": {} }, { "sku": "YAR-204-2RF-VE495", "brand": "SKF", "manufacturer_designation": "YAR 204-2RF/VE495", "series": "YAR2-series", "type": "insert", "d_mm": 20, "D_mm": 47, "B_mm": 31, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 12.7, "static_load_kN": 6.55, "fatigue_load_limit_kN": 0.28, "limiting_speed_rpm": 5000, "max_rpm": 5000, "weight_g": 150, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAR 204-2RF/VE495 is a grub-screw insert bearing with the inner ring extended on both sides, 20x47x31 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. the size code 204 carries the usual bore arithmetic — 20 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. VE495 denotes galvanized rings plus food-compatible sealing components and grease, aimed at humid, cleaned-down installations rather than submerged chemical duty. Envelope 20x47x31 mm (0.787x1.85x1.22 in), outer ring 14 mm wide, C 12.7 kN, C0 6.55 kN, Pu 0.28 kN. The catalogue publishes a single speed ceiling, the limiting speed: 5,000 r/min; mass 150 g. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 28.2 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the inner flinger. Outer-vs-overall width: the outer ring is 14 mm wide inside the 31 mm total, so the extended inner ring accounts for 0.548 of the overall width (8.5 mm of axial projection per side). Width accounting on this execution: 31 mm overall and 14 mm outer-ring width leave the housing designer 17 mm of inner-ring projection to accommodate the locking arrangement. Static-first planning: the 0.211 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 20 mm shaft, not the 12.7 kN L10 value. Capacity density: 12.7 kN from 0.150 kg of bearing steel is about 84.667 kN per kilogram, and per width millimetre the 31 mm unit carries 0.41 kN of dynamic capacity. Zinc-coated food-range note: the VE495 plating is a functional surface, not cosmetic; clean the bore and shaft WITHOUT steel brushes or aggressive descalers, mount dry or with the approved food-grade mounting paste, and touch up damaged plating spots before commissioning the wash-down area. Set-screw geometry on this size: the two 120 deg screws bear on the 20 mm shaft inside the 31 mm total width while the outer ring is only 14 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "small agricultural augers", "textile machinery rollers", "fan and blower pillow blocks" ], "failure_modes": [ "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "The 18.3 mm s1 dimension is the screw seating geometry inside the 17 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 20 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 12.7/6.55 kN figures belong specifically to YAR 204-2RF/VE495; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-204-2RF-VE495?", "a": "The catalogue envelope is 20x47x31 mm with a spherical outside surface; mass 150 g. Ratings C 12.7/6.55 kN, Pu 0.28 kN, limiting speed 5,000 r/min." }, { "q": "What does the designation YAR 204-2RF/VE495 mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. the size code 204 carries the usual bore arithmetic — 20 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. VE495 denotes galvanized rings plus food-compatible sealing components and grease, aimed at humid, cleaned-down installations rather than submerged chemical duty." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAR-204-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 20x47x31 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (12.7/6.55 kN vs 10.8/6.55 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-204-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 20x47x31 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (12.7/6.55 kN vs 10.8/6.55 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YARAG-204", "equiv_brand": "SKF", "level": "full", "note": "Same 20x47x31 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 204 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-204-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 20x47x31 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 204-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-204-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 20x47x31 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 204-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-204-2RF-VE495", "YAR 204-2RF/VE495" ], "locale_variants": {} }, { "sku": "YAR-204-2F", "brand": "SKF", "manufacturer_designation": "YAR 204-2F", "series": "YAR2-series", "type": "insert", "d_mm": 20, "D_mm": 47, "B_mm": 31, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 12.7, "static_load_kN": 6.55, "fatigue_load_limit_kN": 0.28, "limiting_speed_rpm": 8500, "max_rpm": 8500, "weight_g": 150, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YAR 204-2F is SKF's 20 mm-bore grub-screw insert bearing with the inner ring extended on both sides in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 20x47x31 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the size code 204 carries the usual bore arithmetic — 20 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 20x47x31 mm (0.787x1.85x1.22 in), outer ring 14 mm wide, C 12.7 kN, C0 6.55 kN, Pu 0.28 kN. The catalogue publishes a single speed ceiling, the limiting speed: 8,500 r/min; mass 150 g. Bore-to-OD planning: OD 47 over bore 20 is a 2.35x step, while bore/overall-width gives 0.645; the spherical seat in the matching Y-housing must be specified to the 47 mm OD, not to a cylindrical housing bore. Fillet discipline: the printed r_min 0.6 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 20x47 mm insert on its chamfer tilts the whole spherical seat. Outer-vs-overall width: the outer ring is 14 mm wide inside the 31 mm total, so the extended inner ring accounts for 0.548 of the overall width (8.5 mm of axial projection per side). Mass-to-load ratio for YAR-204-2F: 11.811 g of catalogue mass per rated kN of C, and 7.5 g per millimetre of bore — useful when comparing executions of the same 20x47 mm envelope on the drawing. The s1 18.3 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Set-screw geometry on this size: the two 120 deg screws bear on the 20 mm shaft inside the 31 mm total width while the outer ring is only 14 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "textile machinery rollers", "fan and blower pillow blocks", "light conveyors and small belt take-ups" ], "failure_modes": [ "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "The 18.3 mm s1 dimension is the screw seating geometry inside the 17 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 20 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 12.7/6.55 kN figures belong specifically to YAR 204-2F; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-204-2F?", "a": "YAR 204-2F measures 20 mm bore x 47 mm OD x 31 mm overall width (outer ring 14 mm wide), 0.787 x 1.85 x 1.22 in; mass about 150 g. SKF 17000 ratings: C 12.7 kN, C0 6.55 kN, Pu 0.28 kN, limiting speed 8,500 r/min." }, { "q": "What does the designation YAR 204-2F mean?", "a": "the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the size code 204 carries the usual bore arithmetic — 20 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "How is YAR-204-2F lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." }, { "q": "How do the set screws lock the 20 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." } ], "cross_ref": [ { "equiv_sku": "YAR-204-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 20x47x31 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (12.7/6.55 kN vs 10.8/6.55 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-204-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 20x47x31 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (12.7/6.55 kN vs 10.8/6.55 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YARAG-204", "equiv_brand": "SKF", "level": "full", "note": "Same 20x47x31 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 204 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-204-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 20x47x31 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 204-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-204-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 20x47x31 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 204-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-204-2F", "YAR 204-2F" ], "locale_variants": {} }, { "sku": "YAT-205", "brand": "SKF", "manufacturer_designation": "YAT 205", "series": "YAR2-series", "type": "insert", "d_mm": 25, "D_mm": 52, "B_mm": 27.2, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 14, "static_load_kN": 7.8, "fatigue_load_limit_kN": 0.335, "limiting_speed_rpm": 7000, "max_rpm": 7000, "weight_g": 160, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAT 205 is a grub-screw insert bearing with the inner ring extended on one side, 25x52x27.2 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAT is SKF's grub-screw insert design — a single extended inner-ring side housing the two 120 deg set screws. the size code 205 carries the usual bore arithmetic — 25 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units. Envelope 25x52x27.2 mm (0.984x2.047x1.071 in), outer ring 15 mm wide, C 14 kN, C0 7.8 kN, Pu 0.335 kN. The catalogue publishes a single speed ceiling, the limiting speed: 7,000 r/min; mass 160 g. At the printed limiting speed of 7,000 r/min the mean diameter dm = 38.5 mm implies dn about 2.69x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Pitch-diameter arithmetic: dm = (25+52)/2 = 38.5 mm; at the 7,000 r/min limiting speed the ball set runs at dn approx 2.69x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Static-first planning: the 0.287 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 25 mm shaft, not the 14 kN L10 value. The s1 19.5 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Mass-to-load ratio for YAT-205: 11.429 g of catalogue mass per rated kN of C, and 6.4 g per millimetre of bore — useful when comparing executions of the same 25x52 mm envelope on the drawing. Single-extension fitting note: with the inner ring extended only on the locking side, orient the open (non-extended) face toward the shaft step or housing shoulder as the drawing shows — reversed, the set screws end up unsupported by the abutment and the shortened side offers no seal land at all. Service tip for YAT-205: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 13.5 mm radial section.", "applications": [ "garden and groundcare equipment", "trough conveyor idler drives", "ventilation and extraction fans" ], "failure_modes": [ "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "Do not specify the 25 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a one-side YAT insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 19.5 mm s1 dimension is the screw seating geometry inside the 12.2 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Catalogue ratings belong to YAT 205 as the grub one open execution; other order numbers of the YAT 205 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAT-205?", "a": "The catalogue envelope is 25x52x27.2 mm with a spherical outside surface; mass 160 g. Ratings C 14/7.8 kN, Pu 0.335 kN, limiting speed 7,000 r/min." }, { "q": "What does the designation YAT 205 mean?", "a": "YAT is SKF's grub-screw insert design — a single extended inner-ring side housing the two 120 deg set screws. the size code 205 carries the usual bore arithmetic — 25 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." }, { "q": "How is YAT-205 lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." } ], "cross_ref": [ { "equiv_sku": "YAT-205-100", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x27.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAT 205-100 is the grub-screw locking, one-side-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAT-205", "YAT 205" ], "locale_variants": {} }, { "sku": "YAR-205-2RF-HV", "brand": "SKF", "manufacturer_designation": "YAR 205-2RF/HV", "series": "YAR2-series", "type": "insert", "d_mm": 25, "D_mm": 52, "B_mm": 34.1, "material": "SS440C", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 11.9, "static_load_kN": 7.8, "fatigue_load_limit_kN": 0.335, "limiting_speed_rpm": 4300, "max_rpm": 4300, "weight_g": 190, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 205-2RF/HV is a SKF insert bearing (Y-bearing) for a 25 mm shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 52 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 205 carries the usual bore arithmetic — 25 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the HV suffix means stainless rings and balls with food-grade compliant seals and grease; capacity is derated versus the carbon-steel part. Envelope 25x52x34.1 mm (0.984x2.047x1.343 in), outer ring 15 mm wide, C 11.9 kN, C0 7.8 kN, Pu 0.335 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,300 r/min; mass 190 g. Bore-to-OD planning: OD 52 over bore 25 is a 2.08x step, while bore/overall-width gives 0.733; the spherical seat in the matching Y-housing must be specified to the 52 mm OD, not to a cylindrical housing bore. The s1 19.8 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Grease-life arithmetic is dominated by speed: at dn approx 1.66x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Mass-to-load ratio for YAR-205-2RF-HV: 15.966 g of catalogue mass per rated kN of C, and 7.6 g per millimetre of bore — useful when comparing executions of the same 25x52 mm envelope on the drawing. Selection figures for YAR 205-2RF/HV: C0/C is 0.655, Pu 0.335 kN is 2.815 % of the 11.9 kN dynamic rating, and the 190 g catalogue mass works out to roughly 7.6 g per millimetre of the 25 mm bore. Stainless food-range note: HV parts trade some capacity for corrosion resistance and food-compatible lubrication, and the printed limiting speed is set for that fill; do not top up with ordinary mineral grease in service — mixing greases can harden the food-grade fill and seize the seals. Set-screw geometry on this size: the two 120 deg screws bear on the 25 mm shaft inside the 34.1 mm total width while the outer ring is only 15 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "garden and groundcare equipment", "ventilation and extraction fans", "trough conveyor idler drives" ], "failure_modes": [ "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 25 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 19.8 mm s1 dimension is the screw seating geometry inside the 19.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Ordering discipline for the 25 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-205-2RF-HV?", "a": "Boundary dimensions: bore 25 mm, sphered OD 52 mm, overall width 34.1 mm; weight 190 g. Loads: dynamic 11.9 kN, static 7.8 kN, fatigue 0.335 kN; the only published speed is the 4,300 r/min limiting value." }, { "q": "What does the designation YAR 205-2RF/HV mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 205 carries the usual bore arithmetic — 25 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the HV suffix means stainless rings and balls with food-grade compliant seals and grease; capacity is derated versus the carbon-steel part." }, { "q": "How do the set screws lock the 25 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." } ], "cross_ref": [ { "equiv_sku": "YAR-205-2RFGR-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-2RFGR/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YARAG-205", "equiv_brand": "SKF", "level": "partial", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (11.9/7.8 kN vs 14/7.8 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-205-2RF", "equiv_brand": "SKF", "level": "partial", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (11.9/7.8 kN vs 14/7.8 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-205-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (11.9/7.8 kN vs 14/7.8 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-205-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (11.9/7.8 kN vs 14/7.8 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-205-100-2RF-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-100-2RF/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-100-2RFGR-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-100-2RFGR/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YARAG-205-100", "equiv_brand": "SKF", "level": "partial", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (11.9/7.8 kN vs 14/7.8 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-100-2RF", "equiv_brand": "SKF", "level": "partial", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (11.9/7.8 kN vs 14/7.8 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-100-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (11.9/7.8 kN vs 14/7.8 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-100-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (11.9/7.8 kN vs 14/7.8 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-205-2RF-HV", "YAR 205-2RF/HV" ], "locale_variants": {} }, { "sku": "YAR-205-2RFGR-HV", "brand": "SKF", "manufacturer_designation": "YAR 205-2RFGR/HV", "series": "YAR2-series", "type": "insert", "d_mm": 25, "D_mm": 52, "B_mm": 34.1, "material": "SS440C", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 11.9, "static_load_kN": 7.8, "fatigue_load_limit_kN": 0.335, "limiting_speed_rpm": 4300, "max_rpm": 4300, "weight_g": 190, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAR 205-2RFGR/HV is a grub-screw insert bearing with the inner ring extended on both sides, 25x52x34.1 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. the size code 205 carries the usual bore arithmetic — 25 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. HV is the corrosion-resistant food-range variant of the -2RF sealed design — stainless parts plus food-compatible rubber and lubricant, which also explains its lower published C and limiting speed. Envelope 25x52x34.1 mm (0.984x2.047x1.343 in), outer ring 15 mm wide, C 11.9 kN, C0 7.8 kN, Pu 0.335 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,300 r/min; mass 190 g. Mass-to-load ratio for YAR-205-2RFGR-HV: 15.966 g of catalogue mass per rated kN of C, and 7.6 g per millimetre of bore — useful when comparing executions of the same 25x52 mm envelope on the drawing. Selection figures for YAR 205-2RFGR/HV: C0/C is 0.655, Pu 0.335 kN is 2.815 % of the 11.9 kN dynamic rating, and the 190 g catalogue mass works out to roughly 7.6 g per millimetre of the 25 mm bore. Envelope arithmetic: the radial section from 25 mm bore to 52 mm OD is 13.5 mm; dividing C 11.9 kN by that section gives 0.881 kN per section millimetre, and the 34.1 mm overall width is 2.526x the section. Pitch-diameter arithmetic: dm = (25+52)/2 = 38.5 mm; at the 4,300 r/min limiting speed the ball set runs at dn approx 1.66x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Rating split for the maintenance file: dynamic 11.9 kN (L10), static 7.8 kN (s0 shock check), fatigue 0.335 kN (adjusted life) — three separate uses for YAR 205-2RFGR/HV, none interchangeable with another. Stainless food-range note: HV parts trade some capacity for corrosion resistance and food-compatible lubrication, and the printed limiting speed is set for that fill; do not top up with ordinary mineral grease in service — mixing greases can harden the food-grade fill and seize the seals. Service tip for YAR-205-2RFGR-HV: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 13.5 mm radial section.", "applications": [ "ventilation and extraction fans", "garden and groundcare equipment", "small packaging and labelling machines" ], "failure_modes": [ "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 25 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 19.8 mm s1 dimension is the screw seating geometry inside the 19.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Ordering discipline for the 25 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-205-2RFGR-HV?", "a": "The catalogue envelope is 25x52x34.1 mm with a spherical outside surface; mass 190 g. Ratings C 11.9/7.8 kN, Pu 0.335 kN, limiting speed 4,300 r/min." }, { "q": "What does the designation YAR 205-2RFGR/HV mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. the size code 205 carries the usual bore arithmetic — 25 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. HV is the corrosion-resistant food-range variant of the -2RF sealed design — stainless parts plus food-compatible rubber and lubricant, which also explains its lower published C and limiting speed." }, { "q": "How do the set screws lock the 25 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." } ], "cross_ref": [ { "equiv_sku": "YAR-205-2RF-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-2RF/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YARAG-205", "equiv_brand": "SKF", "level": "partial", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (11.9/7.8 kN vs 14/7.8 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-205-2RF", "equiv_brand": "SKF", "level": "partial", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (11.9/7.8 kN vs 14/7.8 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-205-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (11.9/7.8 kN vs 14/7.8 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-205-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (11.9/7.8 kN vs 14/7.8 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-205-100-2RF-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-100-2RF/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-100-2RFGR-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-100-2RFGR/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YARAG-205-100", "equiv_brand": "SKF", "level": "partial", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (11.9/7.8 kN vs 14/7.8 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-100-2RF", "equiv_brand": "SKF", "level": "partial", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (11.9/7.8 kN vs 14/7.8 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-100-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (11.9/7.8 kN vs 14/7.8 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-100-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (11.9/7.8 kN vs 14/7.8 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-205-2RFGR-HV", "YAR 205-2RFGR/HV" ], "locale_variants": {} }, { "sku": "YARAG-205", "brand": "SKF", "manufacturer_designation": "YARAG 205", "series": "YAR2-series", "type": "insert", "d_mm": 25, "D_mm": 52, "B_mm": 34.1, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 14, "static_load_kN": 7.8, "fatigue_load_limit_kN": 0.335, "limiting_speed_rpm": 1500, "max_rpm": 1500, "weight_g": 190, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YARAG 205 is a grub-screw insert bearing with the inner ring extended on both sides, 25x52x34.1 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. the size code 205 carries the usual bore arithmetic — 25 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery. Envelope 25x52x34.1 mm (0.984x2.047x1.343 in), outer ring 15 mm wide, C 14 kN, C0 7.8 kN, Pu 0.335 kN. The catalogue publishes a single speed ceiling, the limiting speed: 1,500 r/min; mass 190 g. Bore-to-OD planning: OD 52 over bore 25 is a 2.08x step, while bore/overall-width gives 0.733; the spherical seat in the matching Y-housing must be specified to the 52 mm OD, not to a cylindrical housing bore. Fillet discipline: the printed r_min 0.6 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 25x52 mm insert on its chamfer tilts the whole spherical seat. Selection figures for YARAG 205: C0/C is 0.557, Pu 0.335 kN is 2.393 % of the 14 kN dynamic rating, and the 190 g catalogue mass works out to roughly 7.6 g per millimetre of the 25 mm bore. Pitch-diameter arithmetic: dm = (25+52)/2 = 38.5 mm; at the 1,500 r/min limiting speed the ball set runs at dn approx 0.58x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Static-first planning: the 0.229 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 25 mm shaft, not the 14 kN L10 value. Set-screw geometry on this size: the two 120 deg screws bear on the 25 mm shaft inside the 34.1 mm total width while the outer ring is only 15 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "ventilation and extraction fans", "head- and tail-shaft pillow blocks in unit handling", "trough conveyor idler drives" ], "failure_modes": [ "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "The 19.8 mm s1 dimension is the screw seating geometry inside the 19.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 25 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 14/7.8 kN figures belong specifically to YARAG 205; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YARAG-205?", "a": "The catalogue envelope is 25x52x34.1 mm with a spherical outside surface; mass 190 g. Ratings C 14/7.8 kN, Pu 0.335 kN, limiting speed 1,500 r/min." }, { "q": "What does the designation YARAG 205 mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. the size code 205 carries the usual bore arithmetic — 25 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery." }, { "q": "How is YARAG-205 lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." }, { "q": "How do the set screws lock the 25 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." } ], "cross_ref": [ { "equiv_sku": "YAR-205-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (14/7.8 kN vs 11.9/7.8 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-205-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (14/7.8 kN vs 11.9/7.8 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-205-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-205-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-205-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-205-100-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (14/7.8 kN vs 11.9/7.8 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-100-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (14/7.8 kN vs 11.9/7.8 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YARAG-205-100", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 205-100 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-100-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-100-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-100-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-100-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-100-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-100-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YARAG-205", "YARAG 205" ], "locale_variants": {} }, { "sku": "YAR-205-2RF", "brand": "SKF", "manufacturer_designation": "YAR 205-2RF", "series": "YAR2-series", "type": "insert", "d_mm": 25, "D_mm": 52, "B_mm": 34.1, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 14, "static_load_kN": 7.8, "fatigue_load_limit_kN": 0.335, "limiting_speed_rpm": 4300, "max_rpm": 4300, "weight_g": 190, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAR 205-2RF is a grub-screw insert bearing with the inner ring extended on both sides, 25x52x34.1 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. the size code 205 carries the usual bore arithmetic — 25 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2RF external design combines contact nitrile seals with rubberized additional flingers on both sides for a tighter labyrinth than the plain-flinger -2F execution. Envelope 25x52x34.1 mm (0.984x2.047x1.343 in), outer ring 15 mm wide, C 14 kN, C0 7.8 kN, Pu 0.335 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,300 r/min; mass 190 g. Speed ceiling of 4,300 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. At the printed limiting speed of 4,300 r/min the mean diameter dm = 38.5 mm implies dn about 1.66x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Capacity density: 14 kN from 0.190 kg of bearing steel is about 73.684 kN per kilogram, and per width millimetre the 34.1 mm unit carries 0.411 kN of dynamic capacity. Static-first planning: the 0.229 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 25 mm shaft, not the 14 kN L10 value. Rating split for the maintenance file: dynamic 14 kN (L10), static 7.8 kN (s0 shock check), fatigue 0.335 kN (adjusted life) — three separate uses for YAR 205-2RF, none interchangeable with another. Rubberized-flinger note: the -2RF coated throwers are vulcanized assemblies — never lever or hammer against the flinger when mounting, and press only on the inner ring when the bearing is fitted loose before the housing cap closes, or the flinger lip folds inward and grinds on the inner ring. Set-screw geometry on this size: the two 120 deg screws bear on the 25 mm shaft inside the 34.1 mm total width while the outer ring is only 15 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "small packaging and labelling machines", "head- and tail-shaft pillow blocks in unit handling", "ventilation and extraction fans" ], "failure_modes": [ "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "Do not specify the 25 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 19.8 mm s1 dimension is the screw seating geometry inside the 19.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Catalogue ratings belong to YAR 205-2RF as the grub two rf execution; other order numbers of the YAR 205 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-205-2RF?", "a": "The catalogue envelope is 25x52x34.1 mm with a spherical outside surface; mass 190 g. Ratings C 14/7.8 kN, Pu 0.335 kN, limiting speed 4,300 r/min." }, { "q": "What does the designation YAR 205-2RF mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. the size code 205 carries the usual bore arithmetic — 25 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2RF external design combines contact nitrile seals with rubberized additional flingers on both sides for a tighter labyrinth than the plain-flinger -2F execution." }, { "q": "How is YAR-205-2RF lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." }, { "q": "How do the set screws lock the 25 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." } ], "cross_ref": [ { "equiv_sku": "YAR-205-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (14/7.8 kN vs 11.9/7.8 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-205-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (14/7.8 kN vs 11.9/7.8 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YARAG-205", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 205 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-205-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-205-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-205-100-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (14/7.8 kN vs 11.9/7.8 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-100-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (14/7.8 kN vs 11.9/7.8 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YARAG-205-100", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 205-100 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-100-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-100-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-100-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-100-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-100-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-100-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-205-2RF", "YAR 205-2RF" ], "locale_variants": {} }, { "sku": "YAR-205-2RF-VE495", "brand": "SKF", "manufacturer_designation": "YAR 205-2RF/VE495", "series": "YAR2-series", "type": "insert", "d_mm": 25, "D_mm": 52, "B_mm": 34.1, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 14, "static_load_kN": 7.8, "fatigue_load_limit_kN": 0.335, "limiting_speed_rpm": 4300, "max_rpm": 4300, "weight_g": 190, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 205-2RF/VE495 is a SKF insert bearing (Y-bearing) for a 25 mm shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 52 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 205 carries the usual bore arithmetic — 25 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the VE495 suffix packages zinc-coated rings with stainless-reinforced food-grade seals/flingers and food-grade lubricant — the wash-down-resistant counterpart of the standard -2RF bearing. Envelope 25x52x34.1 mm (0.984x2.047x1.343 in), outer ring 15 mm wide, C 14 kN, C0 7.8 kN, Pu 0.335 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,300 r/min; mass 190 g. Spherical-seat note in numbers: the 52 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 38.5 = 120.951 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Bore-to-OD planning: OD 52 over bore 25 is a 2.08x step, while bore/overall-width gives 0.733; the spherical seat in the matching Y-housing must be specified to the 52 mm OD, not to a cylindrical housing bore. Rating split for the maintenance file: dynamic 14 kN (L10), static 7.8 kN (s0 shock check), fatigue 0.335 kN (adjusted life) — three separate uses for YAR 205-2RF/VE495, none interchangeable with another. Envelope arithmetic: the radial section from 25 mm bore to 52 mm OD is 13.5 mm; dividing C 14 kN by that section gives 1.037 kN per section millimetre, and the 34.1 mm overall width is 2.526x the section. Load balance for documentation: C0 7.8 kN against C 14 kN gives a 0.557 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Zinc-coated food-range note: the VE495 plating is a functional surface, not cosmetic; clean the bore and shaft WITHOUT steel brushes or aggressive descalers, mount dry or with the approved food-grade mounting paste, and touch up damaged plating spots before commissioning the wash-down area. Set-screw geometry on this size: the two 120 deg screws bear on the 25 mm shaft inside the 34.1 mm total width while the outer ring is only 15 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "small packaging and labelling machines", "ventilation and extraction fans", "head- and tail-shaft pillow blocks in unit handling" ], "failure_modes": [ "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "Do not specify the 25 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 19.8 mm s1 dimension is the screw seating geometry inside the 19.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Catalogue ratings belong to YAR 205-2RF/VE495 as the grub two ve495 execution; other order numbers of the YAR 205 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-205-2RF-VE495?", "a": "Boundary dimensions: bore 25 mm, sphered OD 52 mm, overall width 34.1 mm; weight 190 g. Loads: dynamic 14 kN, static 7.8 kN, fatigue 0.335 kN; the only published speed is the 4,300 r/min limiting value." }, { "q": "What does the designation YAR 205-2RF/VE495 mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 205 carries the usual bore arithmetic — 25 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the VE495 suffix packages zinc-coated rings with stainless-reinforced food-grade seals/flingers and food-grade lubricant — the wash-down-resistant counterpart of the standard -2RF bearing." }, { "q": "How do the set screws lock the 25 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." } ], "cross_ref": [ { "equiv_sku": "YAR-205-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (14/7.8 kN vs 11.9/7.8 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-205-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (14/7.8 kN vs 11.9/7.8 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YARAG-205", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 205 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-205-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-205-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-205-100-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (14/7.8 kN vs 11.9/7.8 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-100-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (14/7.8 kN vs 11.9/7.8 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YARAG-205-100", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 205-100 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-100-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-100-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-100-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-100-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-100-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-100-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-205-2RF-VE495", "YAR 205-2RF/VE495" ], "locale_variants": {} }, { "sku": "YAR-205-2F", "brand": "SKF", "manufacturer_designation": "YAR 205-2F", "series": "YAR2-series", "type": "insert", "d_mm": 25, "D_mm": 52, "B_mm": 34.1, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 14, "static_load_kN": 7.8, "fatigue_load_limit_kN": 0.335, "limiting_speed_rpm": 7000, "max_rpm": 7000, "weight_g": 190, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAR 205-2F is a grub-screw insert bearing with the inner ring extended on both sides, 25x52x34.1 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. the size code 205 carries the usual bore arithmetic — 25 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution. Envelope 25x52x34.1 mm (0.984x2.047x1.343 in), outer ring 15 mm wide, C 14 kN, C0 7.8 kN, Pu 0.335 kN. The catalogue publishes a single speed ceiling, the limiting speed: 7,000 r/min; mass 190 g. Outer-vs-overall width: the outer ring is 15 mm wide inside the 34.1 mm total, so the extended inner ring accounts for 0.56 of the overall width (9.55 mm of axial projection per side). At the printed limiting speed of 7,000 r/min the mean diameter dm = 38.5 mm implies dn about 2.69x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Selection figures for YAR 205-2F: C0/C is 0.557, Pu 0.335 kN is 2.393 % of the 14 kN dynamic rating, and the 190 g catalogue mass works out to roughly 7.6 g per millimetre of the 25 mm bore. Spherical-seat note in numbers: the 52 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 38.5 = 120.951 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 33.7 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the plain flinger. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Set-screw geometry on this size: the two 120 deg screws bear on the 25 mm shaft inside the 34.1 mm total width while the outer ring is only 15 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "ventilation and extraction fans", "head- and tail-shaft pillow blocks in unit handling", "garden and groundcare equipment" ], "failure_modes": [ "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "Do not specify the 25 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 19.8 mm s1 dimension is the screw seating geometry inside the 19.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Catalogue ratings belong to YAR 205-2F as the grub two f execution; other order numbers of the YAR 205 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-205-2F?", "a": "The catalogue envelope is 25x52x34.1 mm with a spherical outside surface; mass 190 g. Ratings C 14/7.8 kN, Pu 0.335 kN, limiting speed 7,000 r/min." }, { "q": "What does the designation YAR 205-2F mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. the size code 205 carries the usual bore arithmetic — 25 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution." }, { "q": "How is YAR-205-2F lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." }, { "q": "How do the set screws lock the 25 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." } ], "cross_ref": [ { "equiv_sku": "YAR-205-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (14/7.8 kN vs 11.9/7.8 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-205-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (14/7.8 kN vs 11.9/7.8 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YARAG-205", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 205 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-205-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-205-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-205-100-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (14/7.8 kN vs 11.9/7.8 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-100-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (14/7.8 kN vs 11.9/7.8 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YARAG-205-100", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 205-100 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-100-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-100-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-100-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-100-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-100-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-100-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-205-2F", "YAR 205-2F" ], "locale_variants": {} }, { "sku": "YAT-206", "brand": "SKF", "manufacturer_designation": "YAT 206", "series": "YAR2-series", "type": "insert", "d_mm": 30, "D_mm": 62, "B_mm": 30.2, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 19.5, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 6300, "max_rpm": 6300, "weight_g": 260, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YAT 206 is SKF's 30 mm-bore grub-screw insert bearing with the inner ring extended on one side in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 30x62x30.2 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAT prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring is extended on one side only. the size code 206 carries the usual bore arithmetic — 30 mm (code 06 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. this suffix-free execution is listed without the sealed external design: the 30.2 mm width is the one-side-extended inner ring alone, so protection depends on the housing seals and the relubrication routine rather than bearing-mounted contact seals. Envelope 30x62x30.2 mm (1.181x2.441x1.189 in), outer ring 18 mm wide, C 19.5 kN, C0 11.2 kN, Pu 0.475 kN. The catalogue publishes a single speed ceiling, the limiting speed: 6,300 r/min; mass 260 g. Envelope arithmetic: the radial section from 30 mm bore to 62 mm OD is 16 mm; dividing C 19.5 kN by that section gives 1.219 kN per section millimetre, and the 30.2 mm overall width is 1.887x the section. Speed ceiling of 6,300 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Bore-to-OD planning: OD 62 over bore 30 is a 2.067x step, while bore/overall-width gives 0.993; the spherical seat in the matching Y-housing must be specified to the 62 mm OD, not to a cylindrical housing bore. Pitch-diameter arithmetic: dm = (30+62)/2 = 46 mm; at the 6,300 r/min limiting speed the ball set runs at dn approx 2.90x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. At the printed limiting speed of 6,300 r/min the mean diameter dm = 46 mm implies dn about 2.90x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Single-extension fitting note: with the inner ring extended only on the locking side, orient the open (non-extended) face toward the shaft step or housing shoulder as the drawing shows — reversed, the set screws end up unsupported by the abutment and the shortened side offers no seal land at all. Service tip for YAT-206: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 16 mm radial section.", "applications": [ "ventilation and extraction fans", "head- and tail-shaft pillow blocks in unit handling", "small packaging and labelling machines" ], "failure_modes": [ "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "Do not specify the 30 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 21 mm s1 dimension is the screw seating geometry inside the 12.2 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a one-side YAT insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Catalogue ratings belong to YAT 206 as the grub one open execution; other order numbers of the YAT 206 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAT-206?", "a": "YAT 206 measures 30 mm bore x 62 mm OD x 30.2 mm overall width (outer ring 18 mm wide), 1.181 x 2.441 x 1.189 in; mass about 260 g. SKF 17000 ratings: C 19.5 kN, C0 11.2 kN, Pu 0.475 kN, limiting speed 6,300 r/min." }, { "q": "What does the designation YAT 206 mean?", "a": "the YAT prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring is extended on one side only. the size code 206 carries the usual bore arithmetic — 30 mm (code 06 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. this suffix-free execution is listed without the sealed external design: the 30.2 mm width is the one-side-extended inner ring alone, so protection depends on the housing seals and the relubrication routine rather than bearing-mounted contact seals." }, { "q": "How is YAT-206 lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." }, { "q": "How do the set screws lock the 30 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." } ], "cross_ref": [ { "equiv_sku": "YAT-206-103", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x30.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAT 206-103 is the grub-screw locking, one-side-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAT-206", "YAT 206" ], "locale_variants": {} }, { "sku": "YAR-206-2RF-HV", "brand": "SKF", "manufacturer_designation": "YAR 206-2RF/HV", "series": "YAR2-series", "type": "insert", "d_mm": 30, "D_mm": 62, "B_mm": 38.1, "material": "SS440C", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 16.3, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 3800, "max_rpm": 3800, "weight_g": 300, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 206-2RF/HV is a SKF insert bearing (Y-bearing) for a 30 mm shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 62 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 206 carries the usual bore arithmetic — 30 mm (code 06 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the HV suffix means stainless rings and balls with food-grade compliant seals and grease; capacity is derated versus the carbon-steel part. Envelope 30x62x38.1 mm (1.181x2.441x1.5 in), outer ring 18 mm wide, C 16.3 kN, C0 11.2 kN, Pu 0.475 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,800 r/min; mass 300 g. Spherical-seat note in numbers: the 62 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 46 = 144.513 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Width accounting on this execution: 38.1 mm overall and 18 mm outer-ring width leave the housing designer 20.1 mm of inner-ring projection to accommodate the locking arrangement. Static-first planning: the 0.294 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 30 mm shaft, not the 16.3 kN L10 value. Mass-to-load ratio for YAR-206-2RF-HV: 18.405 g of catalogue mass per rated kN of C, and 10 g per millimetre of bore — useful when comparing executions of the same 30x62 mm envelope on the drawing. At the printed limiting speed of 3,800 r/min the mean diameter dm = 46 mm implies dn about 1.75x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Stainless food-range note: HV parts trade some capacity for corrosion resistance and food-compatible lubrication, and the printed limiting speed is set for that fill; do not top up with ordinary mineral grease in service — mixing greases can harden the food-grade fill and seize the seals. Service tip for YAR-206-2RF-HV: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 16 mm radial section.", "applications": [ "head- and tail-shaft pillow blocks in unit handling", "small packaging and labelling machines", "garden and groundcare equipment" ], "failure_modes": [ "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "The 22.2 mm s1 dimension is the screw seating geometry inside the 20.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 30 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 16.3/11.2 kN figures belong specifically to YAR 206-2RF/HV; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-206-2RF-HV?", "a": "Boundary dimensions: bore 30 mm, sphered OD 62 mm, overall width 38.1 mm; weight 300 g. Loads: dynamic 16.3 kN, static 11.2 kN, fatigue 0.475 kN; the only published speed is the 3,800 r/min limiting value." }, { "q": "What does the designation YAR 206-2RF/HV mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 206 carries the usual bore arithmetic — 30 mm (code 06 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the HV suffix means stainless rings and balls with food-grade compliant seals and grease; capacity is derated versus the carbon-steel part." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." } ], "cross_ref": [ { "equiv_sku": "YAR-206-2RFGR-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-2RFGR/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YARAG-206", "equiv_brand": "SKF", "level": "partial", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (16.3/11.2 kN vs 19.5/11.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-206-2RF", "equiv_brand": "SKF", "level": "partial", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (16.3/11.2 kN vs 19.5/11.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-206-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (16.3/11.2 kN vs 19.5/11.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-206-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (16.3/11.2 kN vs 19.5/11.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-206-103-2RF-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-103-2RF/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-103-2RFGR-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-103-2RFGR/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YARAG-206-103", "equiv_brand": "SKF", "level": "partial", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (16.3/11.2 kN vs 19.5/11.2 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-103-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (16.3/11.2 kN vs 19.5/11.2 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-103-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (16.3/11.2 kN vs 19.5/11.2 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-206-2RF-HV", "YAR 206-2RF/HV" ], "locale_variants": {} }, { "sku": "YAR-206-2RFGR-HV", "brand": "SKF", "manufacturer_designation": "YAR 206-2RFGR/HV", "series": "YAR2-series", "type": "insert", "d_mm": 30, "D_mm": 62, "B_mm": 38.1, "material": "SS440C", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 16.3, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 3800, "max_rpm": 3800, "weight_g": 300, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 206-2RFGR/HV is a SKF insert bearing (Y-bearing) for a 30 mm shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 62 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 206 carries the usual bore arithmetic — 30 mm (code 06 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the HV suffix means stainless rings and balls with food-grade compliant seals and grease (this article also carries the GR outside-surface lubrication groove); capacity is derated versus the carbon-steel part. Envelope 30x62x38.1 mm (1.181x2.441x1.5 in), outer ring 18 mm wide, C 16.3 kN, C0 11.2 kN, Pu 0.475 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,800 r/min; mass 300 g. Capacity density: 16.3 kN from 0.300 kg of bearing steel is about 54.333 kN per kilogram, and per width millimetre the 38.1 mm unit carries 0.428 kN of dynamic capacity. Imperial procurement cross-check: 1.181 in bore, 2.441 in OD, 1.5 in overall width; the 300 g mass converts to 0.300 kg (10.6 oz) for the bill of materials. Load balance for documentation: C0 11.2 kN against C 16.3 kN gives a 0.687 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Spherical-seat note in numbers: the 62 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 46 = 144.513 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Fatigue-limit check: Pu 0.475 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YAR 206-2RFGR/HV — most belt-driven mounted-unit loads sit comfortably under 2.914 % of C. Stainless food-range note: HV parts trade some capacity for corrosion resistance and food-compatible lubrication, and the printed limiting speed is set for that fill; do not top up with ordinary mineral grease in service — mixing greases can harden the food-grade fill and seize the seals. Service tip for YAR-206-2RFGR-HV: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 16 mm radial section.", "applications": [ "head- and tail-shaft pillow blocks in unit handling", "small packaging and labelling machines", "garden and groundcare equipment" ], "failure_modes": [ "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "Do not specify the 30 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 22.2 mm s1 dimension is the screw seating geometry inside the 20.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Catalogue ratings belong to YAR 206-2RFGR/HV as the grub two hv execution; other order numbers of the YAR 206 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-206-2RFGR-HV?", "a": "Boundary dimensions: bore 30 mm, sphered OD 62 mm, overall width 38.1 mm; weight 300 g. Loads: dynamic 16.3 kN, static 11.2 kN, fatigue 0.475 kN; the only published speed is the 3,800 r/min limiting value." }, { "q": "What does the designation YAR 206-2RFGR/HV mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 206 carries the usual bore arithmetic — 30 mm (code 06 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the HV suffix means stainless rings and balls with food-grade compliant seals and grease (this article also carries the GR outside-surface lubrication groove); capacity is derated versus the carbon-steel part." }, { "q": "How is YAR-206-2RFGR-HV lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." }, { "q": "How do the set screws lock the 30 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." } ], "cross_ref": [ { "equiv_sku": "YAR-206-2RF-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-2RF/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YARAG-206", "equiv_brand": "SKF", "level": "partial", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (16.3/11.2 kN vs 19.5/11.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-206-2RF", "equiv_brand": "SKF", "level": "partial", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (16.3/11.2 kN vs 19.5/11.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-206-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (16.3/11.2 kN vs 19.5/11.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-206-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (16.3/11.2 kN vs 19.5/11.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-206-103-2RF-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-103-2RF/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-103-2RFGR-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-103-2RFGR/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YARAG-206-103", "equiv_brand": "SKF", "level": "partial", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (16.3/11.2 kN vs 19.5/11.2 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-103-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (16.3/11.2 kN vs 19.5/11.2 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-103-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (16.3/11.2 kN vs 19.5/11.2 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-206-2RFGR-HV", "YAR 206-2RFGR/HV" ], "locale_variants": {} }, { "sku": "YARAG-206", "brand": "SKF", "manufacturer_designation": "YARAG 206", "series": "YAR2-series", "type": "insert", "d_mm": 30, "D_mm": 62, "B_mm": 38.1, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 19.5, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 1200, "max_rpm": 1200, "weight_g": 300, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YARAG 206 is a SKF insert bearing (Y-bearing) for a 30 mm shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 62 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 206 carries the usual bore arithmetic — 30 mm (code 06 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the AG suffix identifies the farm-duty variant of the range: sealed and flinger-protected for chaff and dust, with the catalogue deliberately derating its permissible speed versus the industrial execution. Envelope 30x62x38.1 mm (1.181x2.441x1.5 in), outer ring 18 mm wide, C 19.5 kN, C0 11.2 kN, Pu 0.475 kN. The catalogue publishes a single speed ceiling, the limiting speed: 1,200 r/min; mass 300 g. Spherical-seat note in numbers: the 62 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 46 = 144.513 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Outer-vs-overall width: the outer ring is 18 mm wide inside the 38.1 mm total, so the extended inner ring accounts for 0.528 of the overall width (10.05 mm of axial projection per side). Static-first planning: the 0.294 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 30 mm shaft, not the 19.5 kN L10 value. Envelope arithmetic: the radial section from 30 mm bore to 62 mm OD is 16 mm; dividing C 19.5 kN by that section gives 1.219 kN per section millimetre, and the 38.1 mm overall width is 2.381x the section. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 39.7 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the inner flinger. Service tip for YARAG-206: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 16 mm radial section.", "applications": [ "small packaging and labelling machines", "garden and groundcare equipment", "head- and tail-shaft pillow blocks in unit handling" ], "failure_modes": [ "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "The 22.2 mm s1 dimension is the screw seating geometry inside the 20.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 30 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 19.5/11.2 kN figures belong specifically to YARAG 206; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YARAG-206?", "a": "Boundary dimensions: bore 30 mm, sphered OD 62 mm, overall width 38.1 mm; weight 300 g. Loads: dynamic 19.5 kN, static 11.2 kN, fatigue 0.475 kN; the only published speed is the 1,200 r/min limiting value." }, { "q": "What does the designation YARAG 206 mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 206 carries the usual bore arithmetic — 30 mm (code 06 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the AG suffix identifies the farm-duty variant of the range: sealed and flinger-protected for chaff and dust, with the catalogue deliberately derating its permissible speed versus the industrial execution." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAR-206-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (19.5/11.2 kN vs 16.3/11.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-206-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (19.5/11.2 kN vs 16.3/11.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-206-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-206-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-206-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-206-103-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (19.5/11.2 kN vs 16.3/11.2 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-103-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (19.5/11.2 kN vs 16.3/11.2 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YARAG-206-103", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 206-103 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-103-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-103-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-103-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-103-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YARAG-206", "YARAG 206" ], "locale_variants": {} }, { "sku": "YAR-206-2RF", "brand": "SKF", "manufacturer_designation": "YAR 206-2RF", "series": "YAR2-series", "type": "insert", "d_mm": 30, "D_mm": 62, "B_mm": 38.1, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 19.5, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 3800, "max_rpm": 3800, "weight_g": 310, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAR 206-2RF is a grub-screw insert bearing with the inner ring extended on both sides, 30x62x38.1 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. the size code 206 carries the usual bore arithmetic — 30 mm (code 06 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2RF external design combines contact nitrile seals with rubberized additional flingers on both sides for a tighter labyrinth than the plain-flinger -2F execution. Envelope 30x62x38.1 mm (1.181x2.441x1.5 in), outer ring 18 mm wide, C 19.5 kN, C0 11.2 kN, Pu 0.475 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,800 r/min; mass 310 g. Bore-to-OD planning: OD 62 over bore 30 is a 2.067x step, while bore/overall-width gives 0.787; the spherical seat in the matching Y-housing must be specified to the 62 mm OD, not to a cylindrical housing bore. Spherical-seat note in numbers: the 62 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 46 = 144.513 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. At the printed limiting speed of 3,800 r/min the mean diameter dm = 46 mm implies dn about 1.75x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Mass-to-load ratio for YAR-206-2RF: 15.897 g of catalogue mass per rated kN of C, and 10.333 g per millimetre of bore — useful when comparing executions of the same 30x62 mm envelope on the drawing. Pitch-diameter arithmetic: dm = (30+62)/2 = 46 mm; at the 3,800 r/min limiting speed the ball set runs at dn approx 1.75x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Rubberized-flinger note: the -2RF coated throwers are vulcanized assemblies — never lever or hammer against the flinger when mounting, and press only on the inner ring when the bearing is fitted loose before the housing cap closes, or the flinger lip folds inward and grinds on the inner ring. Set-screw geometry on this size: the two 120 deg screws bear on the 30 mm shaft inside the 38.1 mm total width while the outer ring is only 18 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "head- and tail-shaft pillow blocks in unit handling", "trough conveyor idler drives", "garden and groundcare equipment" ], "failure_modes": [ "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "The 22.2 mm s1 dimension is the screw seating geometry inside the 20.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 30 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 19.5/11.2 kN figures belong specifically to YAR 206-2RF; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-206-2RF?", "a": "The catalogue envelope is 30x62x38.1 mm with a spherical outside surface; mass 310 g. Ratings C 19.5/11.2 kN, Pu 0.475 kN, limiting speed 3,800 r/min." }, { "q": "What does the designation YAR 206-2RF mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. the size code 206 carries the usual bore arithmetic — 30 mm (code 06 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2RF external design combines contact nitrile seals with rubberized additional flingers on both sides for a tighter labyrinth than the plain-flinger -2F execution." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." }, { "q": "How is YAR-206-2RF lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." } ], "cross_ref": [ { "equiv_sku": "YAR-206-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (19.5/11.2 kN vs 16.3/11.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-206-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (19.5/11.2 kN vs 16.3/11.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YARAG-206", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 206 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-206-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-206-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-206-103-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (19.5/11.2 kN vs 16.3/11.2 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-103-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (19.5/11.2 kN vs 16.3/11.2 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YARAG-206-103", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 206-103 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-103-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-103-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-103-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-103-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-206-2RF", "YAR 206-2RF" ], "locale_variants": {} }, { "sku": "YAR-206-2RF-VE495", "brand": "SKF", "manufacturer_designation": "YAR 206-2RF/VE495", "series": "YAR2-series", "type": "insert", "d_mm": 30, "D_mm": 62, "B_mm": 38.1, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 19.5, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 3800, "max_rpm": 3800, "weight_g": 310, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 206-2RF/VE495 is a SKF insert bearing (Y-bearing) for a 30 mm shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 62 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 206 carries the usual bore arithmetic — 30 mm (code 06 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the VE495 suffix packages zinc-coated rings with stainless-reinforced food-grade seals/flingers and food-grade lubricant — the wash-down-resistant counterpart of the standard -2RF bearing. Envelope 30x62x38.1 mm (1.181x2.441x1.5 in), outer ring 18 mm wide, C 19.5 kN, C0 11.2 kN, Pu 0.475 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,800 r/min; mass 310 g. Speed ceiling of 3,800 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Grease-life arithmetic is dominated by speed: at dn approx 1.75x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Width accounting on this execution: 38.1 mm overall and 18 mm outer-ring width leave the housing designer 20.1 mm of inner-ring projection to accommodate the locking arrangement. Static-first planning: the 0.294 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 30 mm shaft, not the 19.5 kN L10 value. At the printed limiting speed of 3,800 r/min the mean diameter dm = 46 mm implies dn about 1.75x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Zinc-coated food-range note: the VE495 plating is a functional surface, not cosmetic; clean the bore and shaft WITHOUT steel brushes or aggressive descalers, mount dry or with the approved food-grade mounting paste, and touch up damaged plating spots before commissioning the wash-down area. Set-screw geometry on this size: the two 120 deg screws bear on the 30 mm shaft inside the 38.1 mm total width while the outer ring is only 18 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "small packaging and labelling machines", "garden and groundcare equipment", "ventilation and extraction fans" ], "failure_modes": [ "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 30 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 22.2 mm s1 dimension is the screw seating geometry inside the 20.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Ordering discipline for the 30 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-206-2RF-VE495?", "a": "Boundary dimensions: bore 30 mm, sphered OD 62 mm, overall width 38.1 mm; weight 310 g. Loads: dynamic 19.5 kN, static 11.2 kN, fatigue 0.475 kN; the only published speed is the 3,800 r/min limiting value." }, { "q": "What does the designation YAR 206-2RF/VE495 mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 206 carries the usual bore arithmetic — 30 mm (code 06 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the VE495 suffix packages zinc-coated rings with stainless-reinforced food-grade seals/flingers and food-grade lubricant — the wash-down-resistant counterpart of the standard -2RF bearing." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAR-206-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (19.5/11.2 kN vs 16.3/11.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-206-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (19.5/11.2 kN vs 16.3/11.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YARAG-206", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 206 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-206-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-206-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-206-103-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (19.5/11.2 kN vs 16.3/11.2 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-103-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (19.5/11.2 kN vs 16.3/11.2 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YARAG-206-103", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 206-103 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-103-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-103-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-103-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-103-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-206-2RF-VE495", "YAR 206-2RF/VE495" ], "locale_variants": {} }, { "sku": "YAR-206-2F", "brand": "SKF", "manufacturer_designation": "YAR 206-2F", "series": "YAR2-series", "type": "insert", "d_mm": 30, "D_mm": 62, "B_mm": 38.1, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 19.5, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 6300, "max_rpm": 6300, "weight_g": 310, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 206-2F is a SKF insert bearing (Y-bearing) for a 30 mm shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 62 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 206 carries the usual bore arithmetic — 30 mm (code 06 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 30x62x38.1 mm (1.181x2.441x1.5 in), outer ring 18 mm wide, C 19.5 kN, C0 11.2 kN, Pu 0.475 kN. The catalogue publishes a single speed ceiling, the limiting speed: 6,300 r/min; mass 310 g. Speed ceiling of 6,300 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Load balance for documentation: C0 11.2 kN against C 19.5 kN gives a 0.574 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Imperial procurement cross-check: 1.181 in bore, 2.441 in OD, 1.5 in overall width; the 310 g mass converts to 0.310 kg (10.9 oz) for the bill of materials. Spherical-seat note in numbers: the 62 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 46 = 144.513 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. The s1 22.2 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Service tip for YAR-206-2F: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 16 mm radial section.", "applications": [ "ventilation and extraction fans", "garden and groundcare equipment", "small packaging and labelling machines" ], "failure_modes": [ "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "relubricated with incompatible grease that hardens the factory fill and drags the seals" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 22.2 mm s1 dimension is the screw seating geometry inside the 20.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 30 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Ordering discipline for the 30 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-206-2F?", "a": "Boundary dimensions: bore 30 mm, sphered OD 62 mm, overall width 38.1 mm; weight 310 g. Loads: dynamic 19.5 kN, static 11.2 kN, fatigue 0.475 kN; the only published speed is the 6,300 r/min limiting value." }, { "q": "What does the designation YAR 206-2F mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 206 carries the usual bore arithmetic — 30 mm (code 06 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAR-206-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (19.5/11.2 kN vs 16.3/11.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-206-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (19.5/11.2 kN vs 16.3/11.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YARAG-206", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 206 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-206-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-206-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-206-103-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (19.5/11.2 kN vs 16.3/11.2 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-103-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (19.5/11.2 kN vs 16.3/11.2 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YARAG-206-103", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 206-103 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-103-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-103-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-103-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-103-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-206-2F", "YAR 206-2F" ], "locale_variants": {} }, { "sku": "YAT-207", "brand": "SKF", "manufacturer_designation": "YAT 207", "series": "YAR2-series", "type": "insert", "d_mm": 35, "D_mm": 72, "B_mm": 33, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 5300, "max_rpm": 5300, "weight_g": 380, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAT 207 is a SKF insert bearing (Y-bearing) for a 35 mm shaft: grub-screw insert bearing with the inner ring extended on one side, built to the ISO 15 diameter-series envelope with a sphered OD of 72 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAT basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAT carries the one-side-extended inner ring. the size code 207 carries the usual bore arithmetic — 35 mm (code 07 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. with no -2F/-2RF suffix the order number denotes the open external execution of the YAR2 size — add external exclusion at the housing and plan relubrication intervals for dusty or wet surroundings. Envelope 35x72x33 mm (1.378x2.835x1.299 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. The catalogue publishes a single speed ceiling, the limiting speed: 5,300 r/min; mass 380 g. Fatigue-limit check: Pu 0.655 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YAT 207 — most belt-driven mounted-unit loads sit comfortably under 2.569 % of C. Spherical-seat note in numbers: the 72 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 53.5 = 168.075 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Mass-to-load ratio for YAT-207: 14.902 g of catalogue mass per rated kN of C, and 10.857 g per millimetre of bore — useful when comparing executions of the same 35x72 mm envelope on the drawing. Static-first planning: the 0.464 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 35 mm shaft, not the 25.5 kN L10 value. Load balance for documentation: C0 15.3 kN against C 25.5 kN gives a 0.6 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Single-extension fitting note: with the inner ring extended only on the locking side, orient the open (non-extended) face toward the shaft step or housing shoulder as the drawing shows — reversed, the set screws end up unsupported by the abutment and the shortened side offers no seal land at all. Service tip for YAT-207: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 18.5 mm radial section.", "applications": [ "small packaging and labelling machines", "trough conveyor idler drives", "head- and tail-shaft pillow blocks in unit handling" ], "failure_modes": [ "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "Do not specify the 35 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 23.3 mm s1 dimension is the screw seating geometry inside the 14 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a one-side YAT insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Catalogue ratings belong to YAT 207 as the grub one open execution; other order numbers of the YAT 207 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAT-207?", "a": "Boundary dimensions: bore 35 mm, sphered OD 72 mm, overall width 33 mm; weight 380 g. Loads: dynamic 25.5 kN, static 15.3 kN, fatigue 0.655 kN; the only published speed is the 5,300 r/min limiting value." }, { "q": "What does the designation YAT 207 mean?", "a": "reading the YAT basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAT carries the one-side-extended inner ring. the size code 207 carries the usual bore arithmetic — 35 mm (code 07 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. with no -2F/-2RF suffix the order number denotes the open external execution of the YAR2 size — add external exclusion at the housing and plan relubrication intervals for dusty or wet surroundings." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." }, { "q": "How is YAT-207 lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." } ], "cross_ref": [ { "equiv_sku": "YAT", "equiv_brand": "ISO 15", "level": "full", "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAT-207", "YAT 207" ], "locale_variants": {} }, { "sku": "YAR-207-2RF-HV", "brand": "SKF", "manufacturer_designation": "YAR 207-2RF/HV", "series": "YAR2-series", "type": "insert", "d_mm": 35, "D_mm": 72, "B_mm": 42.9, "material": "SS440C", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 21.6, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 3200, "max_rpm": 3200, "weight_g": 450, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAR 207-2RF/HV is a grub-screw insert bearing with the inner ring extended on both sides, 35x72x42.9 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. the size code 207 carries the usual bore arithmetic — 35 mm (code 07 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. HV is the corrosion-resistant food-range variant of the -2RF sealed design — stainless parts plus food-compatible rubber and lubricant, which also explains its lower published C and limiting speed. Envelope 35x72x42.9 mm (1.378x2.835x1.689 in), outer ring 19 mm wide, C 21.6 kN, C0 15.3 kN, Pu 0.655 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,200 r/min; mass 450 g. Width accounting on this execution: 42.9 mm overall and 19 mm outer-ring width leave the housing designer 23.9 mm of inner-ring projection to accommodate the locking arrangement. Pitch-diameter arithmetic: dm = (35+72)/2 = 53.5 mm; at the 3,200 r/min limiting speed the ball set runs at dn approx 1.71x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Bore-to-OD planning: OD 72 over bore 35 is a 2.057x step, while bore/overall-width gives 0.816; the spherical seat in the matching Y-housing must be specified to the 72 mm OD, not to a cylindrical housing bore. Imperial procurement cross-check: 1.378 in bore, 2.835 in OD, 1.689 in overall width; the 450 g mass converts to 0.450 kg (15.9 oz) for the bill of materials. Load balance for documentation: C0 15.3 kN against C 21.6 kN gives a 0.708 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Stainless food-range note: HV parts trade some capacity for corrosion resistance and food-compatible lubrication, and the printed limiting speed is set for that fill; do not top up with ordinary mineral grease in service — mixing greases can harden the food-grade fill and seize the seals. Service tip for YAR-207-2RF-HV: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 18.5 mm radial section.", "applications": [ "trough conveyor idler drives", "head- and tail-shaft pillow blocks in unit handling", "ventilation and extraction fans" ], "failure_modes": [ "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "The 25.4 mm s1 dimension is the screw seating geometry inside the 23.9 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 35 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 21.6/15.3 kN figures belong specifically to YAR 207-2RF/HV; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-207-2RF-HV?", "a": "The catalogue envelope is 35x72x42.9 mm with a spherical outside surface; mass 450 g. Ratings C 21.6/15.3 kN, Pu 0.655 kN, limiting speed 3,200 r/min." }, { "q": "What does the designation YAR 207-2RF/HV mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. the size code 207 carries the usual bore arithmetic — 35 mm (code 07 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. HV is the corrosion-resistant food-range variant of the -2RF sealed design — stainless parts plus food-compatible rubber and lubricant, which also explains its lower published C and limiting speed." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." }, { "q": "How is YAR-207-2RF-HV lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." } ], "cross_ref": [ { "equiv_sku": "YAR-207-2RFGR-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-2RFGR/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YARAG-207", "equiv_brand": "SKF", "level": "partial", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-2RF", "equiv_brand": "SKF", "level": "partial", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-106-2RF-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-106-2RF/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-106-2RFGR-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-106-2RFGR/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YARAG-207-106", "equiv_brand": "SKF", "level": "partial", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-106-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-106-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-207-2RF-HV", "YAR 207-2RF/HV" ], "locale_variants": {} }, { "sku": "YAR-207-2RFGR-HV", "brand": "SKF", "manufacturer_designation": "YAR 207-2RFGR/HV", "series": "YAR2-series", "type": "insert", "d_mm": 35, "D_mm": 72, "B_mm": 42.9, "material": "SS440C", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 21.6, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 3200, "max_rpm": 3200, "weight_g": 450, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YAR 207-2RFGR/HV is SKF's 35 mm-bore grub-screw insert bearing with the inner ring extended on both sides in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 35x72x42.9 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the size code 207 carries the usual bore arithmetic — 35 mm (code 07 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. /HV identifies the stainless-steel, food-industry execution: stainless bearing components, food-compatible rubber in the seal/flinger set and food-grade grease fill — the catalogue ratings are correspondingly below the standard steel version, and the GR marking adds the lubrication groove in the sphered outside surface on the locking side. Envelope 35x72x42.9 mm (1.378x2.835x1.689 in), outer ring 19 mm wide, C 21.6 kN, C0 15.3 kN, Pu 0.655 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,200 r/min; mass 450 g. Static-first planning: the 0.357 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 35 mm shaft, not the 21.6 kN L10 value. Grease-life arithmetic is dominated by speed: at dn approx 1.71x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Pitch-diameter arithmetic: dm = (35+72)/2 = 53.5 mm; at the 3,200 r/min limiting speed the ball set runs at dn approx 1.71x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Bore-to-OD planning: OD 72 over bore 35 is a 2.057x step, while bore/overall-width gives 0.816; the spherical seat in the matching Y-housing must be specified to the 72 mm OD, not to a cylindrical housing bore. Selection figures for YAR 207-2RFGR/HV: C0/C is 0.708, Pu 0.655 kN is 3.032 % of the 21.6 kN dynamic rating, and the 450 g catalogue mass works out to roughly 12.857 g per millimetre of the 35 mm bore. Stainless food-range note: HV parts trade some capacity for corrosion resistance and food-compatible lubrication, and the printed limiting speed is set for that fill; do not top up with ordinary mineral grease in service — mixing greases can harden the food-grade fill and seize the seals. Service tip for YAR-207-2RFGR-HV: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 18.5 mm radial section.", "applications": [ "garden and groundcare equipment", "head- and tail-shaft pillow blocks in unit handling", "trough conveyor idler drives" ], "failure_modes": [ "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 35 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 25.4 mm s1 dimension is the screw seating geometry inside the 23.9 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Ordering discipline for the 35 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-207-2RFGR-HV?", "a": "YAR 207-2RFGR/HV measures 35 mm bore x 72 mm OD x 42.9 mm overall width (outer ring 19 mm wide), 1.378 x 2.835 x 1.689 in; mass about 450 g. SKF 17000 ratings: C 21.6 kN, C0 15.3 kN, Pu 0.655 kN, limiting speed 3,200 r/min." }, { "q": "What does the designation YAR 207-2RFGR/HV mean?", "a": "the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the size code 207 carries the usual bore arithmetic — 35 mm (code 07 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. /HV identifies the stainless-steel, food-industry execution: stainless bearing components, food-compatible rubber in the seal/flinger set and food-grade grease fill — the catalogue ratings are correspondingly below the standard steel version, and the GR marking adds the lubrication groove in the sphered outside surface on the locking side." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAR-207-2RF-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-2RF/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YARAG-207", "equiv_brand": "SKF", "level": "partial", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-2RF", "equiv_brand": "SKF", "level": "partial", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-106-2RF-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-106-2RF/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-106-2RFGR-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-106-2RFGR/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YARAG-207-106", "equiv_brand": "SKF", "level": "partial", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-106-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-106-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-207-2RFGR-HV", "YAR 207-2RFGR/HV" ], "locale_variants": {} }, { "sku": "YARAG-207", "brand": "SKF", "manufacturer_designation": "YARAG 207", "series": "YAR2-series", "type": "insert", "d_mm": 35, "D_mm": 72, "B_mm": 42.9, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 1100, "max_rpm": 1100, "weight_g": 440, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YARAG 207 is a grub-screw insert bearing with the inner ring extended on both sides, 35x72x42.9 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. the size code 207 carries the usual bore arithmetic — 35 mm (code 07 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery. Envelope 35x72x42.9 mm (1.378x2.835x1.689 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. The catalogue publishes a single speed ceiling, the limiting speed: 1,100 r/min; mass 440 g. Fatigue-limit check: Pu 0.655 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YARAG 207 — most belt-driven mounted-unit loads sit comfortably under 2.569 % of C. Static-first planning: the 0.357 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 35 mm shaft, not the 25.5 kN L10 value. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 35x72 mm insert on its chamfer tilts the whole spherical seat. Imperial procurement cross-check: 1.378 in bore, 2.835 in OD, 1.689 in overall width; the 440 g mass converts to 0.440 kg (15.5 oz) for the bill of materials. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 46.1 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the inner flinger. Service tip for YARAG-207: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 18.5 mm radial section.", "applications": [ "small packaging and labelling machines", "head- and tail-shaft pillow blocks in unit handling", "garden and groundcare equipment" ], "failure_modes": [ "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "Do not specify the 35 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 25.4 mm s1 dimension is the screw seating geometry inside the 23.9 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Catalogue ratings belong to YARAG 207 as the grub two ag execution; other order numbers of the YARAG 207 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YARAG-207?", "a": "The catalogue envelope is 35x72x42.9 mm with a spherical outside surface; mass 440 g. Ratings C 25.5/15.3 kN, Pu 0.655 kN, limiting speed 1,100 r/min." }, { "q": "What does the designation YARAG 207 mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. the size code 207 carries the usual bore arithmetic — 35 mm (code 07 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." } ], "cross_ref": [ { "equiv_sku": "YAR-207-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-207-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-207-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-207-106-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-106-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YARAG-207-106", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 207-106 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-106-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-106-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-106-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-106-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YARAG-207", "YARAG 207" ], "locale_variants": {} }, { "sku": "YAR-207-2RF", "brand": "SKF", "manufacturer_designation": "YAR 207-2RF", "series": "YAR2-series", "type": "insert", "d_mm": 35, "D_mm": 72, "B_mm": 42.9, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 3200, "max_rpm": 3200, "weight_g": 450, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 207-2RF is a SKF insert bearing (Y-bearing) for a 35 mm shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 72 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 207 carries the usual bore arithmetic — 35 mm (code 07 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. -2RF means an NBR contact lip plus a rubber-coated flinger at both sides, the catalogue step above -2F for wet, abrasive or washed-down environments. Envelope 35x72x42.9 mm (1.378x2.835x1.689 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,200 r/min; mass 450 g. Pitch-diameter arithmetic: dm = (35+72)/2 = 53.5 mm; at the 3,200 r/min limiting speed the ball set runs at dn approx 1.71x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Selection figures for YAR 207-2RF: C0/C is 0.6, Pu 0.655 kN is 2.569 % of the 25.5 kN dynamic rating, and the 450 g catalogue mass works out to roughly 12.857 g per millimetre of the 35 mm bore. Mass-to-load ratio for YAR-207-2RF: 17.647 g of catalogue mass per rated kN of C, and 12.857 g per millimetre of bore — useful when comparing executions of the same 35x72 mm envelope on the drawing. Rating split for the maintenance file: dynamic 25.5 kN (L10), static 15.3 kN (s0 shock check), fatigue 0.655 kN (adjusted life) — three separate uses for YAR 207-2RF, none interchangeable with another. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 35x72 mm insert on its chamfer tilts the whole spherical seat. Rubberized-flinger note: the -2RF coated throwers are vulcanized assemblies — never lever or hammer against the flinger when mounting, and press only on the inner ring when the bearing is fitted loose before the housing cap closes, or the flinger lip folds inward and grinds on the inner ring. Service tip for YAR-207-2RF: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 18.5 mm radial section.", "applications": [ "head- and tail-shaft pillow blocks in unit handling", "ventilation and extraction fans", "small packaging and labelling machines" ], "failure_modes": [ "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 25.4 mm s1 dimension is the screw seating geometry inside the 23.9 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 35 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Ordering discipline for the 35 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-207-2RF?", "a": "Boundary dimensions: bore 35 mm, sphered OD 72 mm, overall width 42.9 mm; weight 450 g. Loads: dynamic 25.5 kN, static 15.3 kN, fatigue 0.655 kN; the only published speed is the 3,200 r/min limiting value." }, { "q": "What does the designation YAR 207-2RF mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 207 carries the usual bore arithmetic — 35 mm (code 07 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. -2RF means an NBR contact lip plus a rubber-coated flinger at both sides, the catalogue step above -2F for wet, abrasive or washed-down environments." }, { "q": "How do the set screws lock the 35 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." } ], "cross_ref": [ { "equiv_sku": "YAR-207-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YARAG-207", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 207 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-207-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-207-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-207-106-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-106-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YARAG-207-106", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 207-106 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-106-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-106-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-106-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-106-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-207-2RF", "YAR 207-2RF" ], "locale_variants": {} }, { "sku": "YAR-207-2RF-VE495", "brand": "SKF", "manufacturer_designation": "YAR 207-2RF/VE495", "series": "YAR2-series", "type": "insert", "d_mm": 35, "D_mm": 72, "B_mm": 42.9, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 3200, "max_rpm": 3200, "weight_g": 450, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 207-2RF/VE495 is a SKF insert bearing (Y-bearing) for a 35 mm shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 72 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 207 carries the usual bore arithmetic — 35 mm (code 07 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the VE495 suffix packages zinc-coated rings with stainless-reinforced food-grade seals/flingers and food-grade lubricant — the wash-down-resistant counterpart of the standard -2RF bearing. Envelope 35x72x42.9 mm (1.378x2.835x1.689 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,200 r/min; mass 450 g. Capacity density: 25.5 kN from 0.450 kg of bearing steel is about 56.667 kN per kilogram, and per width millimetre the 42.9 mm unit carries 0.594 kN of dynamic capacity. Load balance for documentation: C0 15.3 kN against C 25.5 kN gives a 0.6 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Imperial procurement cross-check: 1.378 in bore, 2.835 in OD, 1.689 in overall width; the 450 g mass converts to 0.450 kg (15.9 oz) for the bill of materials. The s1 25.4 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. At the printed limiting speed of 3,200 r/min the mean diameter dm = 53.5 mm implies dn about 1.71x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Zinc-coated food-range note: the VE495 plating is a functional surface, not cosmetic; clean the bore and shaft WITHOUT steel brushes or aggressive descalers, mount dry or with the approved food-grade mounting paste, and touch up damaged plating spots before commissioning the wash-down area. Service tip for YAR-207-2RF-VE495: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 18.5 mm radial section.", "applications": [ "trough conveyor idler drives", "garden and groundcare equipment", "small packaging and labelling machines" ], "failure_modes": [ "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 35 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 25.4 mm s1 dimension is the screw seating geometry inside the 23.9 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Ordering discipline for the 35 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-207-2RF-VE495?", "a": "Boundary dimensions: bore 35 mm, sphered OD 72 mm, overall width 42.9 mm; weight 450 g. Loads: dynamic 25.5 kN, static 15.3 kN, fatigue 0.655 kN; the only published speed is the 3,200 r/min limiting value." }, { "q": "What does the designation YAR 207-2RF/VE495 mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 207 carries the usual bore arithmetic — 35 mm (code 07 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the VE495 suffix packages zinc-coated rings with stainless-reinforced food-grade seals/flingers and food-grade lubricant — the wash-down-resistant counterpart of the standard -2RF bearing." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAR-207-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YARAG-207", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 207 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-207-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-207-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-207-106-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-106-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YARAG-207-106", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 207-106 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-106-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-106-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-106-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-106-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-207-2RF-VE495", "YAR 207-2RF/VE495" ], "locale_variants": {} }, { "sku": "YAR-207-2F", "brand": "SKF", "manufacturer_designation": "YAR 207-2F", "series": "YAR2-series", "type": "insert", "d_mm": 35, "D_mm": 72, "B_mm": 42.9, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 5300, "max_rpm": 5300, "weight_g": 450, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 207-2F is a SKF insert bearing (Y-bearing) for a 35 mm shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 72 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 207 carries the usual bore arithmetic — 35 mm (code 07 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 35x72x42.9 mm (1.378x2.835x1.689 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. The catalogue publishes a single speed ceiling, the limiting speed: 5,300 r/min; mass 450 g. Grease-life arithmetic is dominated by speed: at dn approx 2.84x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Selection figures for YAR 207-2F: C0/C is 0.6, Pu 0.655 kN is 2.569 % of the 25.5 kN dynamic rating, and the 450 g catalogue mass works out to roughly 12.857 g per millimetre of the 35 mm bore. Speed ceiling of 5,300 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Imperial procurement cross-check: 1.378 in bore, 2.835 in OD, 1.689 in overall width; the 450 g mass converts to 0.450 kg (15.9 oz) for the bill of materials. Outer-vs-overall width: the outer ring is 19 mm wide inside the 42.9 mm total, so the extended inner ring accounts for 0.557 of the overall width (11.95 mm of axial projection per side). Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Set-screw geometry on this size: the two 120 deg screws bear on the 35 mm shaft inside the 42.9 mm total width while the outer ring is only 19 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "trough conveyor idler drives", "ventilation and extraction fans", "garden and groundcare equipment" ], "failure_modes": [ "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "The 25.4 mm s1 dimension is the screw seating geometry inside the 23.9 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 35 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 25.5/15.3 kN figures belong specifically to YAR 207-2F; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-207-2F?", "a": "Boundary dimensions: bore 35 mm, sphered OD 72 mm, overall width 42.9 mm; weight 450 g. Loads: dynamic 25.5 kN, static 15.3 kN, fatigue 0.655 kN; the only published speed is the 5,300 r/min limiting value." }, { "q": "What does the designation YAR 207-2F mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 207 carries the usual bore arithmetic — 35 mm (code 07 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "How do the set screws lock the 35 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." } ], "cross_ref": [ { "equiv_sku": "YAR-207-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YARAG-207", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 207 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-207-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-207-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-207-106-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-106-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YARAG-207-106", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 207-106 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-106-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-106-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-106-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-106-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-207-2F", "YAR 207-2F" ], "locale_variants": {} }, { "sku": "YAT-208", "brand": "SKF", "manufacturer_designation": "YAT 208", "series": "YAR2-series", "type": "insert", "d_mm": 40, "D_mm": 80, "B_mm": 36, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 30.7, "static_load_kN": 19, "fatigue_load_limit_kN": 0.8, "limiting_speed_rpm": 4800, "max_rpm": 4800, "weight_g": 500, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAT 208 is a grub-screw insert bearing with the inner ring extended on one side, 40x80x36 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAT is SKF's grub-screw insert design — a single extended inner-ring side housing the two 120 deg set screws. the size code 208 carries the usual bore arithmetic — 40 mm (code 08 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units. Envelope 40x80x36 mm (1.575x3.15x1.417 in), outer ring 21 mm wide, C 30.7 kN, C0 19 kN, Pu 0.8 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,800 r/min; mass 500 g. Fatigue-limit check: Pu 0.8 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YAT 208 — most belt-driven mounted-unit loads sit comfortably under 2.606 % of C. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 51.8 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the inner flinger. Imperial procurement cross-check: 1.575 in bore, 3.15 in OD, 1.417 in overall width; the 500 g mass converts to 0.500 kg (17.6 oz) for the bill of materials. Grease-life arithmetic is dominated by speed: at dn approx 2.88x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Bore-to-OD planning: OD 80 over bore 40 is a 2x step, while bore/overall-width gives 1.111; the spherical seat in the matching Y-housing must be specified to the 80 mm OD, not to a cylindrical housing bore. Single-extension fitting note: with the inner ring extended only on the locking side, orient the open (non-extended) face toward the shaft step or housing shoulder as the drawing shows — reversed, the set screws end up unsupported by the abutment and the shortened side offers no seal land at all. Set-screw geometry on this size: the two 120 deg screws bear on the 40 mm shaft inside the 36 mm total width while the outer ring is only 21 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "trough conveyor idler drives", "small packaging and labelling machines", "head- and tail-shaft pillow blocks in unit handling" ], "failure_modes": [ "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "Do not specify the 40 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 25.3 mm s1 dimension is the screw seating geometry inside the 15 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a one-side YAT insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Catalogue ratings belong to YAT 208 as the grub one open execution; other order numbers of the YAT 208 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAT-208?", "a": "The catalogue envelope is 40x80x36 mm with a spherical outside surface; mass 500 g. Ratings C 30.7/19 kN, Pu 0.8 kN, limiting speed 4,800 r/min." }, { "q": "What does the designation YAT 208 mean?", "a": "YAT is SKF's grub-screw insert design — a single extended inner-ring side housing the two 120 deg set screws. the size code 208 carries the usual bore arithmetic — 40 mm (code 08 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." } ], "cross_ref": [ { "equiv_sku": "YAT", "equiv_brand": "ISO 15", "level": "full", "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAT-208", "YAT 208" ], "locale_variants": {} }, { "sku": "YAR-208-2RF-HV", "brand": "SKF", "manufacturer_designation": "YAR 208-2RF/HV", "series": "YAR2-series", "type": "insert", "d_mm": 40, "D_mm": 80, "B_mm": 49.2, "material": "SS440C", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 24.7, "static_load_kN": 19, "fatigue_load_limit_kN": 0.8, "limiting_speed_rpm": 2800, "max_rpm": 2800, "weight_g": 600, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 208-2RF/HV is a SKF insert bearing (Y-bearing) for a 40 mm shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 80 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 208 carries the usual bore arithmetic — 40 mm (code 08 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the HV suffix means stainless rings and balls with food-grade compliant seals and grease; capacity is derated versus the carbon-steel part. Envelope 40x80x49.2 mm (1.575x3.15x1.937 in), outer ring 21 mm wide, C 24.7 kN, C0 19 kN, Pu 0.8 kN. The catalogue publishes a single speed ceiling, the limiting speed: 2,800 r/min; mass 600 g. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 51.8 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the inner flinger. Grease-life arithmetic is dominated by speed: at dn approx 1.68x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Imperial procurement cross-check: 1.575 in bore, 3.15 in OD, 1.937 in overall width; the 600 g mass converts to 0.600 kg (21.2 oz) for the bill of materials. Rating split for the maintenance file: dynamic 24.7 kN (L10), static 19 kN (s0 shock check), fatigue 0.8 kN (adjusted life) — three separate uses for YAR 208-2RF/HV, none interchangeable with another. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 40x80 mm insert on its chamfer tilts the whole spherical seat. Stainless food-range note: HV parts trade some capacity for corrosion resistance and food-compatible lubrication, and the printed limiting speed is set for that fill; do not top up with ordinary mineral grease in service — mixing greases can harden the food-grade fill and seize the seals. Set-screw geometry on this size: the two 120 deg screws bear on the 40 mm shaft inside the 49.2 mm total width while the outer ring is only 21 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "trough conveyor idler drives", "garden and groundcare equipment", "small packaging and labelling machines" ], "failure_modes": [ "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 40 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 30.2 mm s1 dimension is the screw seating geometry inside the 28.2 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Ordering discipline for the 40 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-208-2RF-HV?", "a": "Boundary dimensions: bore 40 mm, sphered OD 80 mm, overall width 49.2 mm; weight 600 g. Loads: dynamic 24.7 kN, static 19 kN, fatigue 0.8 kN; the only published speed is the 2,800 r/min limiting value." }, { "q": "What does the designation YAR 208-2RF/HV mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 208 carries the usual bore arithmetic — 40 mm (code 08 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the HV suffix means stainless rings and balls with food-grade compliant seals and grease; capacity is derated versus the carbon-steel part." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAR-208-2RFGR-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 208-2RFGR/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YARAG-208", "equiv_brand": "SKF", "level": "partial", "note": "Same 40x80x49.2 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (24.7/19 kN vs 30.7/19 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-208-2RF", "equiv_brand": "SKF", "level": "partial", "note": "Same 40x80x49.2 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (24.7/19 kN vs 30.7/19 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-208-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 40x80x49.2 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (24.7/19 kN vs 30.7/19 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-208-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 40x80x49.2 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (24.7/19 kN vs 30.7/19 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-208-109-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 40x80x49.2 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (24.7/19 kN vs 30.7/19 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 40 mm vs 39.6875 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-208-2RF-HV", "YAR 208-2RF/HV" ], "locale_variants": {} }, { "sku": "YAR-208-2RFGR-HV", "brand": "SKF", "manufacturer_designation": "YAR 208-2RFGR/HV", "series": "YAR2-series", "type": "insert", "d_mm": 40, "D_mm": 80, "B_mm": 49.2, "material": "SS440C", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 24.7, "static_load_kN": 19, "fatigue_load_limit_kN": 0.8, "limiting_speed_rpm": 2800, "max_rpm": 2800, "weight_g": 600, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 208-2RFGR/HV is a SKF insert bearing (Y-bearing) for a 40 mm shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 80 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 208 carries the usual bore arithmetic — 40 mm (code 08 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the HV suffix means stainless rings and balls with food-grade compliant seals and grease (this article also carries the GR outside-surface lubrication groove); capacity is derated versus the carbon-steel part. Envelope 40x80x49.2 mm (1.575x3.15x1.937 in), outer ring 21 mm wide, C 24.7 kN, C0 19 kN, Pu 0.8 kN. The catalogue publishes a single speed ceiling, the limiting speed: 2,800 r/min; mass 600 g. Static-first planning: the 0.386 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 40 mm shaft, not the 24.7 kN L10 value. Mass-to-load ratio for YAR-208-2RFGR-HV: 24.291 g of catalogue mass per rated kN of C, and 15 g per millimetre of bore — useful when comparing executions of the same 40x80 mm envelope on the drawing. At the printed limiting speed of 2,800 r/min the mean diameter dm = 60 mm implies dn about 1.68x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Pitch-diameter arithmetic: dm = (40+80)/2 = 60 mm; at the 2,800 r/min limiting speed the ball set runs at dn approx 1.68x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Spherical-seat note in numbers: the 80 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 60 = 188.496 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Stainless food-range note: HV parts trade some capacity for corrosion resistance and food-compatible lubrication, and the printed limiting speed is set for that fill; do not top up with ordinary mineral grease in service — mixing greases can harden the food-grade fill and seize the seals. Set-screw geometry on this size: the two 120 deg screws bear on the 40 mm shaft inside the 49.2 mm total width while the outer ring is only 21 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "ventilation and extraction fans", "garden and groundcare equipment", "head- and tail-shaft pillow blocks in unit handling" ], "failure_modes": [ "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "The 30.2 mm s1 dimension is the screw seating geometry inside the 28.2 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 40 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 24.7/19 kN figures belong specifically to YAR 208-2RFGR/HV; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-208-2RFGR-HV?", "a": "Boundary dimensions: bore 40 mm, sphered OD 80 mm, overall width 49.2 mm; weight 600 g. Loads: dynamic 24.7 kN, static 19 kN, fatigue 0.8 kN; the only published speed is the 2,800 r/min limiting value." }, { "q": "What does the designation YAR 208-2RFGR/HV mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 208 carries the usual bore arithmetic — 40 mm (code 08 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the HV suffix means stainless rings and balls with food-grade compliant seals and grease (this article also carries the GR outside-surface lubrication groove); capacity is derated versus the carbon-steel part." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAR-208-2RF-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 208-2RF/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YARAG-208", "equiv_brand": "SKF", "level": "partial", "note": "Same 40x80x49.2 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (24.7/19 kN vs 30.7/19 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-208-2RF", "equiv_brand": "SKF", "level": "partial", "note": "Same 40x80x49.2 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (24.7/19 kN vs 30.7/19 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-208-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 40x80x49.2 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (24.7/19 kN vs 30.7/19 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-208-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 40x80x49.2 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (24.7/19 kN vs 30.7/19 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-208-109-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 40x80x49.2 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (24.7/19 kN vs 30.7/19 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 40 mm vs 39.6875 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-208-2RFGR-HV", "YAR 208-2RFGR/HV" ], "locale_variants": {} }, { "sku": "YARAG-208", "brand": "SKF", "manufacturer_designation": "YARAG 208", "series": "YAR2-series", "type": "insert", "d_mm": 40, "D_mm": 80, "B_mm": 49.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 30.7, "static_load_kN": 19, "fatigue_load_limit_kN": 0.8, "limiting_speed_rpm": 950, "max_rpm": 950, "weight_g": 590, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YARAG 208 is a SKF insert bearing (Y-bearing) for a 40 mm shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 80 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 208 carries the usual bore arithmetic — 40 mm (code 08 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the AG suffix identifies the farm-duty variant of the range: sealed and flinger-protected for chaff and dust, with the catalogue deliberately derating its permissible speed versus the industrial execution. Envelope 40x80x49.2 mm (1.575x3.15x1.937 in), outer ring 21 mm wide, C 30.7 kN, C0 19 kN, Pu 0.8 kN. The catalogue publishes a single speed ceiling, the limiting speed: 950 r/min; mass 590 g. Rating split for the maintenance file: dynamic 30.7 kN (L10), static 19 kN (s0 shock check), fatigue 0.8 kN (adjusted life) — three separate uses for YARAG 208, none interchangeable with another. Fatigue-limit check: Pu 0.8 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YARAG 208 — most belt-driven mounted-unit loads sit comfortably under 2.606 % of C. Load balance for documentation: C0 19 kN against C 30.7 kN gives a 0.619 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Grease-life arithmetic is dominated by speed: at dn approx 0.57x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the AG variant caps speed so aggressively, and high-temperature mounts shorten both even when load is light. Bore-to-OD planning: OD 80 over bore 40 is a 2x step, while bore/overall-width gives 0.813; the spherical seat in the matching Y-housing must be specified to the 80 mm OD, not to a cylindrical housing bore. Set-screw geometry on this size: the two 120 deg screws bear on the 40 mm shaft inside the 49.2 mm total width while the outer ring is only 21 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "head- and tail-shaft pillow blocks in unit handling", "small packaging and labelling machines", "trough conveyor idler drives" ], "failure_modes": [ "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "The 30.2 mm s1 dimension is the screw seating geometry inside the 28.2 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 40 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 30.7/19 kN figures belong specifically to YARAG 208; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YARAG-208?", "a": "Boundary dimensions: bore 40 mm, sphered OD 80 mm, overall width 49.2 mm; weight 590 g. Loads: dynamic 30.7 kN, static 19 kN, fatigue 0.8 kN; the only published speed is the 950 r/min limiting value." }, { "q": "What does the designation YARAG 208 mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 208 carries the usual bore arithmetic — 40 mm (code 08 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the AG suffix identifies the farm-duty variant of the range: sealed and flinger-protected for chaff and dust, with the catalogue deliberately derating its permissible speed versus the industrial execution." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." } ], "cross_ref": [ { "equiv_sku": "YAR-208-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 40x80x49.2 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (30.7/19 kN vs 24.7/19 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-208-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 40x80x49.2 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (30.7/19 kN vs 24.7/19 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-208-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 208-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-208-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 208-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-208-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 208-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-208-109-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 208-109-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 40 mm vs 39.6875 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YARAG-208", "YARAG 208" ], "locale_variants": {} }, { "sku": "YAR-208-2RF", "brand": "SKF", "manufacturer_designation": "YAR 208-2RF", "series": "YAR2-series", "type": "insert", "d_mm": 40, "D_mm": 80, "B_mm": 49.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 30.7, "static_load_kN": 19, "fatigue_load_limit_kN": 0.8, "limiting_speed_rpm": 2800, "max_rpm": 2800, "weight_g": 600, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAR 208-2RF is a grub-screw insert bearing with the inner ring extended on both sides, 40x80x49.2 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. the size code 208 carries the usual bore arithmetic — 40 mm (code 08 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2RF external design combines contact nitrile seals with rubberized additional flingers on both sides for a tighter labyrinth than the plain-flinger -2F execution. Envelope 40x80x49.2 mm (1.575x3.15x1.937 in), outer ring 21 mm wide, C 30.7 kN, C0 19 kN, Pu 0.8 kN. The catalogue publishes a single speed ceiling, the limiting speed: 2,800 r/min; mass 600 g. Width accounting on this execution: 49.2 mm overall and 21 mm outer-ring width leave the housing designer 28.2 mm of inner-ring projection to accommodate the locking arrangement. Mass-to-load ratio for YAR-208-2RF: 19.544 g of catalogue mass per rated kN of C, and 15 g per millimetre of bore — useful when comparing executions of the same 40x80 mm envelope on the drawing. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 40x80 mm insert on its chamfer tilts the whole spherical seat. Spherical-seat note in numbers: the 80 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 60 = 188.496 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Pitch-diameter arithmetic: dm = (40+80)/2 = 60 mm; at the 2,800 r/min limiting speed the ball set runs at dn approx 1.68x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Rubberized-flinger note: the -2RF coated throwers are vulcanized assemblies — never lever or hammer against the flinger when mounting, and press only on the inner ring when the bearing is fitted loose before the housing cap closes, or the flinger lip folds inward and grinds on the inner ring. Service tip for YAR-208-2RF: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 20 mm radial section.", "applications": [ "ventilation and extraction fans", "garden and groundcare equipment", "head- and tail-shaft pillow blocks in unit handling" ], "failure_modes": [ "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "The 30.2 mm s1 dimension is the screw seating geometry inside the 28.2 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 40 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 30.7/19 kN figures belong specifically to YAR 208-2RF; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-208-2RF?", "a": "The catalogue envelope is 40x80x49.2 mm with a spherical outside surface; mass 600 g. Ratings C 30.7/19 kN, Pu 0.8 kN, limiting speed 2,800 r/min." }, { "q": "What does the designation YAR 208-2RF mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. the size code 208 carries the usual bore arithmetic — 40 mm (code 08 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2RF external design combines contact nitrile seals with rubberized additional flingers on both sides for a tighter labyrinth than the plain-flinger -2F execution." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAR-208-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 40x80x49.2 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (30.7/19 kN vs 24.7/19 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-208-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 40x80x49.2 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (30.7/19 kN vs 24.7/19 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YARAG-208", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 208 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-208-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 208-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-208-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 208-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-208-109-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 208-109-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 40 mm vs 39.6875 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-208-2RF", "YAR 208-2RF" ], "locale_variants": {} }, { "sku": "YAR-208-2RF-VE495", "brand": "SKF", "manufacturer_designation": "YAR 208-2RF/VE495", "series": "YAR2-series", "type": "insert", "d_mm": 40, "D_mm": 80, "B_mm": 49.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 30.7, "static_load_kN": 19, "fatigue_load_limit_kN": 0.8, "limiting_speed_rpm": 2800, "max_rpm": 2800, "weight_g": 610, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 208-2RF/VE495 is a SKF insert bearing (Y-bearing) for a 40 mm shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 80 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 208 carries the usual bore arithmetic — 40 mm (code 08 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the VE495 suffix packages zinc-coated rings with stainless-reinforced food-grade seals/flingers and food-grade lubricant — the wash-down-resistant counterpart of the standard -2RF bearing. Envelope 40x80x49.2 mm (1.575x3.15x1.937 in), outer ring 21 mm wide, C 30.7 kN, C0 19 kN, Pu 0.8 kN. The catalogue publishes a single speed ceiling, the limiting speed: 2,800 r/min; mass 610 g. Capacity density: 30.7 kN from 0.610 kg of bearing steel is about 50.328 kN per kilogram, and per width millimetre the 49.2 mm unit carries 0.624 kN of dynamic capacity. Outer-vs-overall width: the outer ring is 21 mm wide inside the 49.2 mm total, so the extended inner ring accounts for 0.573 of the overall width (14.1 mm of axial projection per side). Fatigue-limit check: Pu 0.8 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YAR 208-2RF/VE495 — most belt-driven mounted-unit loads sit comfortably under 2.606 % of C. Static-first planning: the 0.386 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 40 mm shaft, not the 30.7 kN L10 value. Grease-life arithmetic is dominated by speed: at dn approx 1.68x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Zinc-coated food-range note: the VE495 plating is a functional surface, not cosmetic; clean the bore and shaft WITHOUT steel brushes or aggressive descalers, mount dry or with the approved food-grade mounting paste, and touch up damaged plating spots before commissioning the wash-down area. Set-screw geometry on this size: the two 120 deg screws bear on the 40 mm shaft inside the 49.2 mm total width while the outer ring is only 21 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "small packaging and labelling machines", "garden and groundcare equipment", "head- and tail-shaft pillow blocks in unit handling" ], "failure_modes": [ "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 40 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 30.2 mm s1 dimension is the screw seating geometry inside the 28.2 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Ordering discipline for the 40 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-208-2RF-VE495?", "a": "Boundary dimensions: bore 40 mm, sphered OD 80 mm, overall width 49.2 mm; weight 610 g. Loads: dynamic 30.7 kN, static 19 kN, fatigue 0.8 kN; the only published speed is the 2,800 r/min limiting value." }, { "q": "What does the designation YAR 208-2RF/VE495 mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 208 carries the usual bore arithmetic — 40 mm (code 08 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the VE495 suffix packages zinc-coated rings with stainless-reinforced food-grade seals/flingers and food-grade lubricant — the wash-down-resistant counterpart of the standard -2RF bearing." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAR-208-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 40x80x49.2 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (30.7/19 kN vs 24.7/19 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-208-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 40x80x49.2 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (30.7/19 kN vs 24.7/19 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YARAG-208", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 208 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-208-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 208-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-208-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 208-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-208-109-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 208-109-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 40 mm vs 39.6875 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-208-2RF-VE495", "YAR 208-2RF/VE495" ], "locale_variants": {} }, { "sku": "YAR-208-2F", "brand": "SKF", "manufacturer_designation": "YAR 208-2F", "series": "YAR2-series", "type": "insert", "d_mm": 40, "D_mm": 80, "B_mm": 49.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 30.7, "static_load_kN": 19, "fatigue_load_limit_kN": 0.8, "limiting_speed_rpm": 4800, "max_rpm": 4800, "weight_g": 600, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YAR 208-2F is SKF's 40 mm-bore grub-screw insert bearing with the inner ring extended on both sides in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 40x80x49.2 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the size code 208 carries the usual bore arithmetic — 40 mm (code 08 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 40x80x49.2 mm (1.575x3.15x1.937 in), outer ring 21 mm wide, C 30.7 kN, C0 19 kN, Pu 0.8 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,800 r/min; mass 600 g. Fatigue-limit check: Pu 0.8 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YAR 208-2F — most belt-driven mounted-unit loads sit comfortably under 2.606 % of C. Envelope arithmetic: the radial section from 40 mm bore to 80 mm OD is 20 mm; dividing C 30.7 kN by that section gives 1.535 kN per section millimetre, and the 49.2 mm overall width is 2.46x the section. The s1 30.2 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Outer-vs-overall width: the outer ring is 21 mm wide inside the 49.2 mm total, so the extended inner ring accounts for 0.573 of the overall width (14.1 mm of axial projection per side). At the printed limiting speed of 4,800 r/min the mean diameter dm = 60 mm implies dn about 2.88x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Service tip for YAR-208-2F: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 20 mm radial section.", "applications": [ "garden and groundcare equipment", "small packaging and labelling machines", "head- and tail-shaft pillow blocks in unit handling" ], "failure_modes": [ "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 30.2 mm s1 dimension is the screw seating geometry inside the 28.2 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 40 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Ordering discipline for the 40 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-208-2F?", "a": "YAR 208-2F measures 40 mm bore x 80 mm OD x 49.2 mm overall width (outer ring 21 mm wide), 1.575 x 3.15 x 1.937 in; mass about 600 g. SKF 17000 ratings: C 30.7 kN, C0 19 kN, Pu 0.8 kN, limiting speed 4,800 r/min." }, { "q": "What does the designation YAR 208-2F mean?", "a": "the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the size code 208 carries the usual bore arithmetic — 40 mm (code 08 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." } ], "cross_ref": [ { "equiv_sku": "YAR-208-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 40x80x49.2 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (30.7/19 kN vs 24.7/19 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-208-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 40x80x49.2 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (30.7/19 kN vs 24.7/19 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YARAG-208", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 208 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-208-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 208-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-208-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 208-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-208-109-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 208-109-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 40 mm vs 39.6875 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-208-2F", "YAR 208-2F" ], "locale_variants": {} }, { "sku": "YAT-209", "brand": "SKF", "manufacturer_designation": "YAT 209", "series": "YAR2-series", "type": "insert", "d_mm": 45, "D_mm": 85, "B_mm": 37, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 33.2, "static_load_kN": 21.6, "fatigue_load_limit_kN": 0.915, "limiting_speed_rpm": 4300, "max_rpm": 4300, "weight_g": 560, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAT 209 is a grub-screw insert bearing with the inner ring extended on one side, 45x85x37 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAT is SKF's grub-screw insert design — a single extended inner-ring side housing the two 120 deg set screws. the size code 209 carries the usual bore arithmetic — 45 mm (code 09 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units. Envelope 45x85x37 mm (1.772x3.346x1.457 in), outer ring 22 mm wide, C 33.2 kN, C0 21.6 kN, Pu 0.915 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,300 r/min; mass 560 g. Spherical-seat note in numbers: the 85 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 65 = 204.204 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Bore-to-OD planning: OD 85 over bore 45 is a 1.889x step, while bore/overall-width gives 1.216; the spherical seat in the matching Y-housing must be specified to the 85 mm OD, not to a cylindrical housing bore. At the printed limiting speed of 4,300 r/min the mean diameter dm = 65 mm implies dn about 2.79x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 45x85 mm insert on its chamfer tilts the whole spherical seat. Fatigue-limit check: Pu 0.915 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YAT 209 — most belt-driven mounted-unit loads sit comfortably under 2.756 % of C. Single-extension fitting note: with the inner ring extended only on the locking side, orient the open (non-extended) face toward the shaft step or housing shoulder as the drawing shows — reversed, the set screws end up unsupported by the abutment and the shortened side offers no seal land at all. Set-screw geometry on this size: the two 120 deg screws bear on the 45 mm shaft inside the 37 mm total width while the outer ring is only 22 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "trough conveyor idler drives", "ventilation and extraction fans", "small packaging and labelling machines" ], "failure_modes": [ "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "The 25.8 mm s1 dimension is the screw seating geometry inside the 15 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a one-side YAT insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 45 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 33.2/21.6 kN figures belong specifically to YAT 209; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAT-209?", "a": "The catalogue envelope is 45x85x37 mm with a spherical outside surface; mass 560 g. Ratings C 33.2/21.6 kN, Pu 0.915 kN, limiting speed 4,300 r/min." }, { "q": "What does the designation YAT 209 mean?", "a": "YAT is SKF's grub-screw insert design — a single extended inner-ring side housing the two 120 deg set screws. the size code 209 carries the usual bore arithmetic — 45 mm (code 09 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units." }, { "q": "How do the set screws lock the 45 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." } ], "cross_ref": [ { "equiv_sku": "YAT", "equiv_brand": "ISO 15", "level": "full", "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAT-209", "YAT 209" ], "locale_variants": {} }, { "sku": "YARAG-209", "brand": "SKF", "manufacturer_designation": "YARAG 209", "series": "YAR2-series", "type": "insert", "d_mm": 45, "D_mm": 85, "B_mm": 49.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 33.2, "static_load_kN": 21.6, "fatigue_load_limit_kN": 0.915, "limiting_speed_rpm": 850, "max_rpm": 850, "weight_g": 660, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YARAG 209 is a grub-screw insert bearing with the inner ring extended on both sides, 45x85x49.2 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. the size code 209 carries the usual bore arithmetic — 45 mm (code 09 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery. Envelope 45x85x49.2 mm (1.772x3.346x1.937 in), outer ring 22 mm wide, C 33.2 kN, C0 21.6 kN, Pu 0.915 kN. The catalogue publishes a single speed ceiling, the limiting speed: 850 r/min; mass 660 g. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 56.8 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the inner flinger. Envelope arithmetic: the radial section from 45 mm bore to 85 mm OD is 20 mm; dividing C 33.2 kN by that section gives 1.66 kN per section millimetre, and the 49.2 mm overall width is 2.46x the section. Static-first planning: the 0.439 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 45 mm shaft, not the 33.2 kN L10 value. Load balance for documentation: C0 21.6 kN against C 33.2 kN gives a 0.651 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 45x85 mm insert on its chamfer tilts the whole spherical seat. Service tip for YARAG-209: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 20 mm radial section.", "applications": [ "head- and tail-shaft pillow blocks in unit handling", "small packaging and labelling machines", "garden and groundcare equipment" ], "failure_modes": [ "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "The 30.2 mm s1 dimension is the screw seating geometry inside the 27.2 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 45 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 33.2/21.6 kN figures belong specifically to YARAG 209; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YARAG-209?", "a": "The catalogue envelope is 45x85x49.2 mm with a spherical outside surface; mass 660 g. Ratings C 33.2/21.6 kN, Pu 0.915 kN, limiting speed 850 r/min." }, { "q": "What does the designation YARAG 209 mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. the size code 209 carries the usual bore arithmetic — 45 mm (code 09 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." } ], "cross_ref": [ { "equiv_sku": "YAR-209-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 45x85x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 209-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-209-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 45x85x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 209-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YARAG-209", "YARAG 209" ], "locale_variants": {} }, { "sku": "YAR-209-2RF", "brand": "SKF", "manufacturer_designation": "YAR 209-2RF", "series": "YAR2-series", "type": "insert", "d_mm": 45, "D_mm": 85, "B_mm": 49.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 33.2, "static_load_kN": 21.6, "fatigue_load_limit_kN": 0.915, "limiting_speed_rpm": 2400, "max_rpm": 2400, "weight_g": 670, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YAR 209-2RF is SKF's 45 mm-bore grub-screw insert bearing with the inner ring extended on both sides in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 45x85x49.2 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the size code 209 carries the usual bore arithmetic — 45 mm (code 09 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. suffix -2RF upgrades the -2F package with a RUBBERIZED flinger on each side — the coated thrower closes the radial gap against fine dust and slurry better than the plain steel flinger of -2F. Envelope 45x85x49.2 mm (1.772x3.346x1.937 in), outer ring 22 mm wide, C 33.2 kN, C0 21.6 kN, Pu 0.915 kN. The catalogue publishes a single speed ceiling, the limiting speed: 2,400 r/min; mass 670 g. Mass-to-load ratio for YAR-209-2RF: 20.181 g of catalogue mass per rated kN of C, and 14.889 g per millimetre of bore — useful when comparing executions of the same 45x85 mm envelope on the drawing. Rating split for the maintenance file: dynamic 33.2 kN (L10), static 21.6 kN (s0 shock check), fatigue 0.915 kN (adjusted life) — three separate uses for YAR 209-2RF, none interchangeable with another. Spherical-seat note in numbers: the 85 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 65 = 204.204 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Capacity density: 33.2 kN from 0.670 kg of bearing steel is about 49.552 kN per kilogram, and per width millimetre the 49.2 mm unit carries 0.675 kN of dynamic capacity. Static-first planning: the 0.439 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 45 mm shaft, not the 33.2 kN L10 value. Rubberized-flinger note: the -2RF coated throwers are vulcanized assemblies — never lever or hammer against the flinger when mounting, and press only on the inner ring when the bearing is fitted loose before the housing cap closes, or the flinger lip folds inward and grinds on the inner ring. Service tip for YAR-209-2RF: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 20 mm radial section.", "applications": [ "head- and tail-shaft pillow blocks in unit handling", "ventilation and extraction fans", "garden and groundcare equipment" ], "failure_modes": [ "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "Do not specify the 45 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 30.2 mm s1 dimension is the screw seating geometry inside the 27.2 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Catalogue ratings belong to YAR 209-2RF as the grub two rf execution; other order numbers of the YAR 209 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-209-2RF?", "a": "YAR 209-2RF measures 45 mm bore x 85 mm OD x 49.2 mm overall width (outer ring 22 mm wide), 1.772 x 3.346 x 1.937 in; mass about 670 g. SKF 17000 ratings: C 33.2 kN, C0 21.6 kN, Pu 0.915 kN, limiting speed 2,400 r/min." }, { "q": "What does the designation YAR 209-2RF mean?", "a": "the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the size code 209 carries the usual bore arithmetic — 45 mm (code 09 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. suffix -2RF upgrades the -2F package with a RUBBERIZED flinger on each side — the coated thrower closes the radial gap against fine dust and slurry better than the plain steel flinger of -2F." }, { "q": "How do the set screws lock the 45 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." } ], "cross_ref": [ { "equiv_sku": "YARAG-209", "equiv_brand": "SKF", "level": "full", "note": "Same 45x85x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 209 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-209-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 45x85x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 209-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-209-2RF", "YAR 209-2RF" ], "locale_variants": {} }, { "sku": "YAR-209-2F", "brand": "SKF", "manufacturer_designation": "YAR 209-2F", "series": "YAR2-series", "type": "insert", "d_mm": 45, "D_mm": 85, "B_mm": 49.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 33.2, "static_load_kN": 21.6, "fatigue_load_limit_kN": 0.915, "limiting_speed_rpm": 4300, "max_rpm": 4300, "weight_g": 670, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 209-2F is a SKF insert bearing (Y-bearing) for a 45 mm shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 85 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 209 carries the usual bore arithmetic — 45 mm (code 09 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 45x85x49.2 mm (1.772x3.346x1.937 in), outer ring 22 mm wide, C 33.2 kN, C0 21.6 kN, Pu 0.915 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,300 r/min; mass 670 g. Static-first planning: the 0.439 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 45 mm shaft, not the 33.2 kN L10 value. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 56.8 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the plain flinger. Bore-to-OD planning: OD 85 over bore 45 is a 1.889x step, while bore/overall-width gives 0.915; the spherical seat in the matching Y-housing must be specified to the 85 mm OD, not to a cylindrical housing bore. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 45x85 mm insert on its chamfer tilts the whole spherical seat. Capacity density: 33.2 kN from 0.670 kg of bearing steel is about 49.552 kN per kilogram, and per width millimetre the 49.2 mm unit carries 0.675 kN of dynamic capacity. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Service tip for YAR-209-2F: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 20 mm radial section.", "applications": [ "trough conveyor idler drives", "head- and tail-shaft pillow blocks in unit handling", "ventilation and extraction fans" ], "failure_modes": [ "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "Do not specify the 45 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 30.2 mm s1 dimension is the screw seating geometry inside the 27.2 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Catalogue ratings belong to YAR 209-2F as the grub two f execution; other order numbers of the YAR 209 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-209-2F?", "a": "Boundary dimensions: bore 45 mm, sphered OD 85 mm, overall width 49.2 mm; weight 670 g. Loads: dynamic 33.2 kN, static 21.6 kN, fatigue 0.915 kN; the only published speed is the 4,300 r/min limiting value." }, { "q": "What does the designation YAR 209-2F mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 209 carries the usual bore arithmetic — 45 mm (code 09 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." }, { "q": "How is YAR-209-2F lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." } ], "cross_ref": [ { "equiv_sku": "YARAG-209", "equiv_brand": "SKF", "level": "full", "note": "Same 45x85x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 209 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-209-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 45x85x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 209-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-209-2F", "YAR 209-2F" ], "locale_variants": {} }, { "sku": "YAT-210", "brand": "SKF", "manufacturer_designation": "YAT 210", "series": "YAR2-series", "type": "insert", "d_mm": 50, "D_mm": 90, "B_mm": 38.8, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 35.1, "static_load_kN": 23.2, "fatigue_load_limit_kN": 0.98, "limiting_speed_rpm": 4000, "max_rpm": 4000, "weight_g": 630, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAT 210 is a grub-screw insert bearing with the inner ring extended on one side, 50x90x38.8 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAT is SKF's grub-screw insert design — a single extended inner-ring side housing the two 120 deg set screws. the size code 210 carries the usual bore arithmetic — 50 mm (code 10 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units. Envelope 50x90x38.8 mm (1.969x3.543x1.528 in), outer ring 22 mm wide, C 35.1 kN, C0 23.2 kN, Pu 0.98 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,000 r/min; mass 630 g. Selection figures for YAT 210: C0/C is 0.661, Pu 0.98 kN is 2.792 % of the 35.1 kN dynamic rating, and the 630 g catalogue mass works out to roughly 12.6 g per millimetre of the 50 mm bore. Static-first planning: the 0.598 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 50 mm shaft, not the 35.1 kN L10 value. Load balance for documentation: C0 23.2 kN against C 35.1 kN gives a 0.661 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Rating split for the maintenance file: dynamic 35.1 kN (L10), static 23.2 kN (s0 shock check), fatigue 0.98 kN (adjusted life) — three separate uses for YAT 210, none interchangeable with another. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 50x90 mm insert on its chamfer tilts the whole spherical seat. Single-extension fitting note: with the inner ring extended only on the locking side, orient the open (non-extended) face toward the shaft step or housing shoulder as the drawing shows — reversed, the set screws end up unsupported by the abutment and the shortened side offers no seal land at all. Service tip for YAT-210: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 20 mm radial section.", "applications": [ "head- and tail-shaft pillow blocks in unit handling", "small packaging and labelling machines", "trough conveyor idler drives" ], "failure_modes": [ "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "The 27.6 mm s1 dimension is the screw seating geometry inside the 16.8 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 50 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a one-side YAT insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 35.1/23.2 kN figures belong specifically to YAT 210; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAT-210?", "a": "The catalogue envelope is 50x90x38.8 mm with a spherical outside surface; mass 630 g. Ratings C 35.1/23.2 kN, Pu 0.98 kN, limiting speed 4,000 r/min." }, { "q": "What does the designation YAT 210 mean?", "a": "YAT is SKF's grub-screw insert design — a single extended inner-ring side housing the two 120 deg set screws. the size code 210 carries the usual bore arithmetic — 50 mm (code 10 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." } ], "cross_ref": [ { "equiv_sku": "YAT", "equiv_brand": "ISO 15", "level": "full", "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAT-210", "YAT 210" ], "locale_variants": {} }, { "sku": "YAR-210-2RF-HV", "brand": "SKF", "manufacturer_designation": "YAR 210-2RF/HV", "series": "YAR2-series", "type": "insert", "d_mm": 50, "D_mm": 90, "B_mm": 51.6, "material": "SS440C", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 29.6, "static_load_kN": 23.2, "fatigue_load_limit_kN": 0.98, "limiting_speed_rpm": 2200, "max_rpm": 2200, "weight_g": 760, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 210-2RF/HV is a SKF insert bearing (Y-bearing) for a 50 mm shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 90 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 210 carries the usual bore arithmetic — 50 mm (code 10 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the HV suffix means stainless rings and balls with food-grade compliant seals and grease; capacity is derated versus the carbon-steel part. Envelope 50x90x51.6 mm (1.969x3.543x2.031 in), outer ring 22 mm wide, C 29.6 kN, C0 23.2 kN, Pu 0.98 kN. The catalogue publishes a single speed ceiling, the limiting speed: 2,200 r/min; mass 760 g. Rating split for the maintenance file: dynamic 29.6 kN (L10), static 23.2 kN (s0 shock check), fatigue 0.98 kN (adjusted life) — three separate uses for YAR 210-2RF/HV, none interchangeable with another. Pitch-diameter arithmetic: dm = (50+90)/2 = 70 mm; at the 2,200 r/min limiting speed the ball set runs at dn approx 1.54x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Load balance for documentation: C0 23.2 kN against C 29.6 kN gives a 0.784 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Static-first planning: the 0.45 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 50 mm shaft, not the 29.6 kN L10 value. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 50x90 mm insert on its chamfer tilts the whole spherical seat. Stainless food-range note: HV parts trade some capacity for corrosion resistance and food-compatible lubrication, and the printed limiting speed is set for that fill; do not top up with ordinary mineral grease in service — mixing greases can harden the food-grade fill and seize the seals. Service tip for YAR-210-2RF-HV: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 20 mm radial section.", "applications": [ "small packaging and labelling machines", "trough conveyor idler drives", "head- and tail-shaft pillow blocks in unit handling" ], "failure_modes": [ "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "relubricated with incompatible grease that hardens the factory fill and drags the seals" ], "pitfalls": [ "The 32.6 mm s1 dimension is the screw seating geometry inside the 29.6 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 50 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 29.6/23.2 kN figures belong specifically to YAR 210-2RF/HV; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-210-2RF-HV?", "a": "Boundary dimensions: bore 50 mm, sphered OD 90 mm, overall width 51.6 mm; weight 760 g. Loads: dynamic 29.6 kN, static 23.2 kN, fatigue 0.98 kN; the only published speed is the 2,200 r/min limiting value." }, { "q": "What does the designation YAR 210-2RF/HV mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 210 carries the usual bore arithmetic — 50 mm (code 10 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the HV suffix means stainless rings and balls with food-grade compliant seals and grease; capacity is derated versus the carbon-steel part." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." }, { "q": "How is YAR-210-2RF-HV lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." } ], "cross_ref": [ { "equiv_sku": "YAR-210-2RFGR-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 50x90x51.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 210-2RFGR/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YARAG-210", "equiv_brand": "SKF", "level": "partial", "note": "Same 50x90x51.6 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (29.6/23.2 kN vs 35.1/23.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-210-2RF", "equiv_brand": "SKF", "level": "partial", "note": "Same 50x90x51.6 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (29.6/23.2 kN vs 35.1/23.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-210-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 50x90x51.6 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (29.6/23.2 kN vs 35.1/23.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-210-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 50x90x51.6 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (29.6/23.2 kN vs 35.1/23.2 kN) — envelope match, not a load-rating equivalent." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-210-2RF-HV", "YAR 210-2RF/HV" ], "locale_variants": {} }, { "sku": "YAR-210-2RFGR-HV", "brand": "SKF", "manufacturer_designation": "YAR 210-2RFGR/HV", "series": "YAR2-series", "type": "insert", "d_mm": 50, "D_mm": 90, "B_mm": 51.6, "material": "SS440C", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 29.6, "static_load_kN": 23.2, "fatigue_load_limit_kN": 0.98, "limiting_speed_rpm": 2200, "max_rpm": 2200, "weight_g": 760, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YAR 210-2RFGR/HV is SKF's 50 mm-bore grub-screw insert bearing with the inner ring extended on both sides in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 50x90x51.6 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the size code 210 carries the usual bore arithmetic — 50 mm (code 10 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. /HV identifies the stainless-steel, food-industry execution: stainless bearing components, food-compatible rubber in the seal/flinger set and food-grade grease fill — the catalogue ratings are correspondingly below the standard steel version, and the GR marking adds the lubrication groove in the sphered outside surface on the locking side. Envelope 50x90x51.6 mm (1.969x3.543x2.031 in), outer ring 22 mm wide, C 29.6 kN, C0 23.2 kN, Pu 0.98 kN. The catalogue publishes a single speed ceiling, the limiting speed: 2,200 r/min; mass 760 g. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 50x90 mm insert on its chamfer tilts the whole spherical seat. Fatigue-limit check: Pu 0.98 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YAR 210-2RFGR/HV — most belt-driven mounted-unit loads sit comfortably under 3.311 % of C. Spherical-seat note in numbers: the 90 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 70 = 219.911 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Capacity density: 29.6 kN from 0.760 kg of bearing steel is about 38.947 kN per kilogram, and per width millimetre the 51.6 mm unit carries 0.574 kN of dynamic capacity. Static-first planning: the 0.45 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 50 mm shaft, not the 29.6 kN L10 value. Stainless food-range note: HV parts trade some capacity for corrosion resistance and food-compatible lubrication, and the printed limiting speed is set for that fill; do not top up with ordinary mineral grease in service — mixing greases can harden the food-grade fill and seize the seals. Service tip for YAR-210-2RFGR-HV: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 20 mm radial section.", "applications": [ "trough conveyor idler drives", "small packaging and labelling machines", "ventilation and extraction fans" ], "failure_modes": [ "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "The 32.6 mm s1 dimension is the screw seating geometry inside the 29.6 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 50 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 29.6/23.2 kN figures belong specifically to YAR 210-2RFGR/HV; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-210-2RFGR-HV?", "a": "YAR 210-2RFGR/HV measures 50 mm bore x 90 mm OD x 51.6 mm overall width (outer ring 22 mm wide), 1.969 x 3.543 x 2.031 in; mass about 760 g. SKF 17000 ratings: C 29.6 kN, C0 23.2 kN, Pu 0.98 kN, limiting speed 2,200 r/min." }, { "q": "What does the designation YAR 210-2RFGR/HV mean?", "a": "the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the size code 210 carries the usual bore arithmetic — 50 mm (code 10 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. /HV identifies the stainless-steel, food-industry execution: stainless bearing components, food-compatible rubber in the seal/flinger set and food-grade grease fill — the catalogue ratings are correspondingly below the standard steel version, and the GR marking adds the lubrication groove in the sphered outside surface on the locking side." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." } ], "cross_ref": [ { "equiv_sku": "YAR-210-2RF-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 50x90x51.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 210-2RF/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YARAG-210", "equiv_brand": "SKF", "level": "partial", "note": "Same 50x90x51.6 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (29.6/23.2 kN vs 35.1/23.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-210-2RF", "equiv_brand": "SKF", "level": "partial", "note": "Same 50x90x51.6 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (29.6/23.2 kN vs 35.1/23.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-210-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 50x90x51.6 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (29.6/23.2 kN vs 35.1/23.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-210-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 50x90x51.6 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (29.6/23.2 kN vs 35.1/23.2 kN) — envelope match, not a load-rating equivalent." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-210-2RFGR-HV", "YAR 210-2RFGR/HV" ], "locale_variants": {} }, { "sku": "YARAG-210", "brand": "SKF", "manufacturer_designation": "YARAG 210", "series": "YAR2-series", "type": "insert", "d_mm": 50, "D_mm": 90, "B_mm": 51.6, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 35.1, "static_load_kN": 23.2, "fatigue_load_limit_kN": 0.98, "limiting_speed_rpm": 800, "max_rpm": 800, "weight_g": 750, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YARAG 210 is a grub-screw insert bearing with the inner ring extended on both sides, 50x90x51.6 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. the size code 210 carries the usual bore arithmetic — 50 mm (code 10 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery. Envelope 50x90x51.6 mm (1.969x3.543x2.031 in), outer ring 22 mm wide, C 35.1 kN, C0 23.2 kN, Pu 0.98 kN. The catalogue publishes a single speed ceiling, the limiting speed: 800 r/min; mass 750 g. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 50x90 mm insert on its chamfer tilts the whole spherical seat. Spherical-seat note in numbers: the 90 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 70 = 219.911 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Rating split for the maintenance file: dynamic 35.1 kN (L10), static 23.2 kN (s0 shock check), fatigue 0.98 kN (adjusted life) — three separate uses for YARAG 210, none interchangeable with another. Bore-to-OD planning: OD 90 over bore 50 is a 1.8x step, while bore/overall-width gives 0.969; the spherical seat in the matching Y-housing must be specified to the 90 mm OD, not to a cylindrical housing bore. Speed ceiling of 800 r/min is the catalogue mechanical limit for THIS execution; the AG agricultural derate is deliberate, so real fan duty is planned well below it. Set-screw geometry on this size: the two 120 deg screws bear on the 50 mm shaft inside the 51.6 mm total width while the outer ring is only 22 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "trough conveyor idler drives", "ventilation and extraction fans", "small packaging and labelling machines" ], "failure_modes": [ "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "Do not specify the 50 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 32.6 mm s1 dimension is the screw seating geometry inside the 29.6 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Catalogue ratings belong to YARAG 210 as the grub two ag execution; other order numbers of the YARAG 210 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YARAG-210?", "a": "The catalogue envelope is 50x90x51.6 mm with a spherical outside surface; mass 750 g. Ratings C 35.1/23.2 kN, Pu 0.98 kN, limiting speed 800 r/min." }, { "q": "What does the designation YARAG 210 mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. the size code 210 carries the usual bore arithmetic — 50 mm (code 10 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." }, { "q": "How is YARAG-210 lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." } ], "cross_ref": [ { "equiv_sku": "YAR-210-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 50x90x51.6 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (35.1/23.2 kN vs 29.6/23.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-210-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 50x90x51.6 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (35.1/23.2 kN vs 29.6/23.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-210-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 50x90x51.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 210-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-210-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 50x90x51.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 210-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-210-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 50x90x51.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 210-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YARAG-210", "YARAG 210" ], "locale_variants": {} }, { "sku": "YAR-210-2RF", "brand": "SKF", "manufacturer_designation": "YAR 210-2RF", "series": "YAR2-series", "type": "insert", "d_mm": 50, "D_mm": 90, "B_mm": 51.6, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 35.1, "static_load_kN": 23.2, "fatigue_load_limit_kN": 0.98, "limiting_speed_rpm": 2200, "max_rpm": 2200, "weight_g": 770, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YAR 210-2RF is SKF's 50 mm-bore grub-screw insert bearing with the inner ring extended on both sides in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 50x90x51.6 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the size code 210 carries the usual bore arithmetic — 50 mm (code 10 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. suffix -2RF upgrades the -2F package with a RUBBERIZED flinger on each side — the coated thrower closes the radial gap against fine dust and slurry better than the plain steel flinger of -2F. Envelope 50x90x51.6 mm (1.969x3.543x2.031 in), outer ring 22 mm wide, C 35.1 kN, C0 23.2 kN, Pu 0.98 kN. The catalogue publishes a single speed ceiling, the limiting speed: 2,200 r/min; mass 770 g. Outer-vs-overall width: the outer ring is 22 mm wide inside the 51.6 mm total, so the extended inner ring accounts for 0.574 of the overall width (14.8 mm of axial projection per side). Speed ceiling of 2,200 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Rating split for the maintenance file: dynamic 35.1 kN (L10), static 23.2 kN (s0 shock check), fatigue 0.98 kN (adjusted life) — three separate uses for YAR 210-2RF, none interchangeable with another. Spherical-seat note in numbers: the 90 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 70 = 219.911 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Capacity density: 35.1 kN from 0.770 kg of bearing steel is about 45.584 kN per kilogram, and per width millimetre the 51.6 mm unit carries 0.68 kN of dynamic capacity. Rubberized-flinger note: the -2RF coated throwers are vulcanized assemblies — never lever or hammer against the flinger when mounting, and press only on the inner ring when the bearing is fitted loose before the housing cap closes, or the flinger lip folds inward and grinds on the inner ring. Set-screw geometry on this size: the two 120 deg screws bear on the 50 mm shaft inside the 51.6 mm total width while the outer ring is only 22 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "ventilation and extraction fans", "head- and tail-shaft pillow blocks in unit handling", "garden and groundcare equipment" ], "failure_modes": [ "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "relubricated with incompatible grease that hardens the factory fill and drags the seals" ], "pitfalls": [ "The 32.6 mm s1 dimension is the screw seating geometry inside the 29.6 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 50 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 35.1/23.2 kN figures belong specifically to YAR 210-2RF; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-210-2RF?", "a": "YAR 210-2RF measures 50 mm bore x 90 mm OD x 51.6 mm overall width (outer ring 22 mm wide), 1.969 x 3.543 x 2.031 in; mass about 770 g. SKF 17000 ratings: C 35.1 kN, C0 23.2 kN, Pu 0.98 kN, limiting speed 2,200 r/min." }, { "q": "What does the designation YAR 210-2RF mean?", "a": "the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the size code 210 carries the usual bore arithmetic — 50 mm (code 10 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. suffix -2RF upgrades the -2F package with a RUBBERIZED flinger on each side — the coated thrower closes the radial gap against fine dust and slurry better than the plain steel flinger of -2F." }, { "q": "How is YAR-210-2RF lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." }, { "q": "How do the set screws lock the 50 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." } ], "cross_ref": [ { "equiv_sku": "YAR-210-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 50x90x51.6 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (35.1/23.2 kN vs 29.6/23.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-210-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 50x90x51.6 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (35.1/23.2 kN vs 29.6/23.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YARAG-210", "equiv_brand": "SKF", "level": "full", "note": "Same 50x90x51.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 210 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-210-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 50x90x51.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 210-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-210-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 50x90x51.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 210-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-210-2RF", "YAR 210-2RF" ], "locale_variants": {} }, { "sku": "YAR-210-2RF-VE495", "brand": "SKF", "manufacturer_designation": "YAR 210-2RF/VE495", "series": "YAR2-series", "type": "insert", "d_mm": 50, "D_mm": 90, "B_mm": 51.6, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 35.1, "static_load_kN": 23.2, "fatigue_load_limit_kN": 0.98, "limiting_speed_rpm": 2200, "max_rpm": 2200, "weight_g": 770, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAR 210-2RF/VE495 is a grub-screw insert bearing with the inner ring extended on both sides, 50x90x51.6 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. the size code 210 carries the usual bore arithmetic — 50 mm (code 10 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. VE495 denotes galvanized rings plus food-compatible sealing components and grease, aimed at humid, cleaned-down installations rather than submerged chemical duty. Envelope 50x90x51.6 mm (1.969x3.543x2.031 in), outer ring 22 mm wide, C 35.1 kN, C0 23.2 kN, Pu 0.98 kN. The catalogue publishes a single speed ceiling, the limiting speed: 2,200 r/min; mass 770 g. Width accounting on this execution: 51.6 mm overall and 22 mm outer-ring width leave the housing designer 29.6 mm of inner-ring projection to accommodate the locking arrangement. Imperial procurement cross-check: 1.969 in bore, 3.543 in OD, 2.031 in overall width; the 770 g mass converts to 0.770 kg (27.2 oz) for the bill of materials. Load balance for documentation: C0 23.2 kN against C 35.1 kN gives a 0.661 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Static-first planning: the 0.45 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 50 mm shaft, not the 35.1 kN L10 value. Grease-life arithmetic is dominated by speed: at dn approx 1.54x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Zinc-coated food-range note: the VE495 plating is a functional surface, not cosmetic; clean the bore and shaft WITHOUT steel brushes or aggressive descalers, mount dry or with the approved food-grade mounting paste, and touch up damaged plating spots before commissioning the wash-down area. Service tip for YAR-210-2RF-VE495: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 20 mm radial section.", "applications": [ "head- and tail-shaft pillow blocks in unit handling", "garden and groundcare equipment", "trough conveyor idler drives" ], "failure_modes": [ "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 32.6 mm s1 dimension is the screw seating geometry inside the 29.6 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 50 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Ordering discipline for the 50 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-210-2RF-VE495?", "a": "The catalogue envelope is 50x90x51.6 mm with a spherical outside surface; mass 770 g. Ratings C 35.1/23.2 kN, Pu 0.98 kN, limiting speed 2,200 r/min." }, { "q": "What does the designation YAR 210-2RF/VE495 mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. the size code 210 carries the usual bore arithmetic — 50 mm (code 10 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. VE495 denotes galvanized rings plus food-compatible sealing components and grease, aimed at humid, cleaned-down installations rather than submerged chemical duty." }, { "q": "How is YAR-210-2RF-VE495 lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." }, { "q": "How do the set screws lock the 50 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." } ], "cross_ref": [ { "equiv_sku": "YAR-210-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 50x90x51.6 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (35.1/23.2 kN vs 29.6/23.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-210-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 50x90x51.6 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (35.1/23.2 kN vs 29.6/23.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YARAG-210", "equiv_brand": "SKF", "level": "full", "note": "Same 50x90x51.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 210 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-210-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 50x90x51.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 210-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-210-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 50x90x51.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 210-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-210-2RF-VE495", "YAR 210-2RF/VE495" ], "locale_variants": {} }, { "sku": "YAR-210-2F", "brand": "SKF", "manufacturer_designation": "YAR 210-2F", "series": "YAR2-series", "type": "insert", "d_mm": 50, "D_mm": 90, "B_mm": 51.6, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 35.1, "static_load_kN": 23.2, "fatigue_load_limit_kN": 0.98, "limiting_speed_rpm": 4000, "max_rpm": 4000, "weight_g": 760, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 210-2F is a SKF insert bearing (Y-bearing) for a 50 mm shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 90 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 210 carries the usual bore arithmetic — 50 mm (code 10 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 50x90x51.6 mm (1.969x3.543x2.031 in), outer ring 22 mm wide, C 35.1 kN, C0 23.2 kN, Pu 0.98 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,000 r/min; mass 760 g. Width accounting on this execution: 51.6 mm overall and 22 mm outer-ring width leave the housing designer 29.6 mm of inner-ring projection to accommodate the locking arrangement. Speed ceiling of 4,000 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 62.5 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the plain flinger. Static-first planning: the 0.45 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 50 mm shaft, not the 35.1 kN L10 value. Capacity density: 35.1 kN from 0.760 kg of bearing steel is about 46.184 kN per kilogram, and per width millimetre the 51.6 mm unit carries 0.68 kN of dynamic capacity. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Set-screw geometry on this size: the two 120 deg screws bear on the 50 mm shaft inside the 51.6 mm total width while the outer ring is only 22 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "small packaging and labelling machines", "head- and tail-shaft pillow blocks in unit handling", "garden and groundcare equipment" ], "failure_modes": [ "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "The 32.6 mm s1 dimension is the screw seating geometry inside the 29.6 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 50 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 35.1/23.2 kN figures belong specifically to YAR 210-2F; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-210-2F?", "a": "Boundary dimensions: bore 50 mm, sphered OD 90 mm, overall width 51.6 mm; weight 760 g. Loads: dynamic 35.1 kN, static 23.2 kN, fatigue 0.98 kN; the only published speed is the 4,000 r/min limiting value." }, { "q": "What does the designation YAR 210-2F mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 210 carries the usual bore arithmetic — 50 mm (code 10 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "How is YAR-210-2F lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." }, { "q": "How do the set screws lock the 50 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." } ], "cross_ref": [ { "equiv_sku": "YAR-210-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 50x90x51.6 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (35.1/23.2 kN vs 29.6/23.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-210-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 50x90x51.6 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (35.1/23.2 kN vs 29.6/23.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YARAG-210", "equiv_brand": "SKF", "level": "full", "note": "Same 50x90x51.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 210 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-210-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 50x90x51.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 210-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-210-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 50x90x51.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 210-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-210-2F", "YAR 210-2F" ], "locale_variants": {} }, { "sku": "YAR-211-2RF", "brand": "SKF", "manufacturer_designation": "YAR 211-2RF", "series": "YAR2-series", "type": "insert", "d_mm": 55, "D_mm": 100, "B_mm": 55.6, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 43.6, "static_load_kN": 29, "fatigue_load_limit_kN": 1.25, "limiting_speed_rpm": 1900, "max_rpm": 1900, "weight_g": 1050, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 211-2RF is a SKF insert bearing (Y-bearing) for a 55 mm shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 100 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 211 carries the usual bore arithmetic — 55 mm (code 11 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. -2RF means an NBR contact lip plus a rubber-coated flinger at both sides, the catalogue step above -2F for wet, abrasive or washed-down environments. Envelope 55x100x55.6 mm (2.165x3.937x2.189 in), outer ring 25 mm wide, C 43.6 kN, C0 29 kN, Pu 1.25 kN. The catalogue publishes a single speed ceiling, the limiting speed: 1,900 r/min; mass 1050 g. Selection figures for YAR 211-2RF: C0/C is 0.665, Pu 1.25 kN is 2.867 % of the 43.6 kN dynamic rating, and the 1050 g catalogue mass works out to roughly 19.091 g per millimetre of the 55 mm bore. Imperial procurement cross-check: 2.165 in bore, 3.937 in OD, 2.189 in overall width; the 1050 g mass converts to 1.050 kg (37.0 oz) for the bill of materials. Load balance for documentation: C0 29 kN against C 43.6 kN gives a 0.665 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. The s1 33.4 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. At the printed limiting speed of 1,900 r/min the mean diameter dm = 77.5 mm implies dn about 1.47x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Rubberized-flinger note: the -2RF coated throwers are vulcanized assemblies — never lever or hammer against the flinger when mounting, and press only on the inner ring when the bearing is fitted loose before the housing cap closes, or the flinger lip folds inward and grinds on the inner ring. Service tip for YAR-211-2RF: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 22.5 mm radial section.", "applications": [ "head- and tail-shaft pillow blocks in unit handling", "trough conveyor idler drives", "garden and groundcare equipment" ], "failure_modes": [ "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "relubricated with incompatible grease that hardens the factory fill and drags the seals" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 55 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 33.4 mm s1 dimension is the screw seating geometry inside the 30.6 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Ordering discipline for the 55 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-211-2RF?", "a": "Boundary dimensions: bore 55 mm, sphered OD 100 mm, overall width 55.6 mm; weight 1050 g. Loads: dynamic 43.6 kN, static 29 kN, fatigue 1.25 kN; the only published speed is the 1,900 r/min limiting value." }, { "q": "What does the designation YAR 211-2RF mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 211 carries the usual bore arithmetic — 55 mm (code 11 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. -2RF means an NBR contact lip plus a rubber-coated flinger at both sides, the catalogue step above -2F for wet, abrasive or washed-down environments." }, { "q": "How is YAR-211-2RF lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." }, { "q": "How do the set screws lock the 55 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." } ], "cross_ref": [ { "equiv_sku": "YAR-211-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 55x100x55.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 211-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YEL-211-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 55x100x55.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 211-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-211-2RF", "YAR 211-2RF" ], "locale_variants": {} }, { "sku": "YAR-211-2F", "brand": "SKF", "manufacturer_designation": "YAR 211-2F", "series": "YAR2-series", "type": "insert", "d_mm": 55, "D_mm": 100, "B_mm": 55.6, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 43.6, "static_load_kN": 29, "fatigue_load_limit_kN": 1.25, "limiting_speed_rpm": 3600, "max_rpm": 3600, "weight_g": 1050, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YAR 211-2F is SKF's 55 mm-bore grub-screw insert bearing with the inner ring extended on both sides in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 55x100x55.6 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the size code 211 carries the usual bore arithmetic — 55 mm (code 11 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 55x100x55.6 mm (2.165x3.937x2.189 in), outer ring 25 mm wide, C 43.6 kN, C0 29 kN, Pu 1.25 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,600 r/min; mass 1050 g. Rating split for the maintenance file: dynamic 43.6 kN (L10), static 29 kN (s0 shock check), fatigue 1.25 kN (adjusted life) — three separate uses for YAR 211-2F, none interchangeable with another. Load balance for documentation: C0 29 kN against C 43.6 kN gives a 0.665 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Bore-to-OD planning: OD 100 over bore 55 is a 1.818x step, while bore/overall-width gives 0.989; the spherical seat in the matching Y-housing must be specified to the 100 mm OD, not to a cylindrical housing bore. Imperial procurement cross-check: 2.165 in bore, 3.937 in OD, 2.189 in overall width; the 1050 g mass converts to 1.050 kg (37.0 oz) for the bill of materials. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 69 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the plain flinger. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Service tip for YAR-211-2F: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 22.5 mm radial section.", "applications": [ "head- and tail-shaft pillow blocks in unit handling", "garden and groundcare equipment", "trough conveyor idler drives" ], "failure_modes": [ "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "The 33.4 mm s1 dimension is the screw seating geometry inside the 30.6 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 55 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 43.6/29 kN figures belong specifically to YAR 211-2F; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-211-2F?", "a": "YAR 211-2F measures 55 mm bore x 100 mm OD x 55.6 mm overall width (outer ring 25 mm wide), 2.165 x 3.937 x 2.189 in; mass about 1050 g. SKF 17000 ratings: C 43.6 kN, C0 29 kN, Pu 1.25 kN, limiting speed 3,600 r/min." }, { "q": "What does the designation YAR 211-2F mean?", "a": "the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the size code 211 carries the usual bore arithmetic — 55 mm (code 11 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAR-211-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 55x100x55.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 211-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YEL-211-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 55x100x55.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 211-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-211-2F", "YAR 211-2F" ], "locale_variants": {} }, { "sku": "YAR-212-2RF", "brand": "SKF", "manufacturer_designation": "YAR 212-2RF", "series": "YAR2-series", "type": "insert", "d_mm": 60, "D_mm": 110, "B_mm": 65.1, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 52.7, "static_load_kN": 36, "fatigue_load_limit_kN": 1.53, "limiting_speed_rpm": 1800, "max_rpm": 1800, "weight_g": 1400, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 212-2RF is a SKF insert bearing (Y-bearing) for a 60 mm shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 110 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 212 carries the usual bore arithmetic — 60 mm (code 12 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. -2RF means an NBR contact lip plus a rubber-coated flinger at both sides, the catalogue step above -2F for wet, abrasive or washed-down environments. Envelope 60x110x65.1 mm (2.362x4.331x2.563 in), outer ring 26 mm wide, C 52.7 kN, C0 36 kN, Pu 1.53 kN. The catalogue publishes a single speed ceiling, the limiting speed: 1,800 r/min; mass 1400 g. Capacity density: 52.7 kN from 1.400 kg of bearing steel is about 37.643 kN per kilogram, and per width millimetre the 65.1 mm unit carries 0.81 kN of dynamic capacity. Grease-life arithmetic is dominated by speed: at dn approx 1.53x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Selection figures for YAR 212-2RF: C0/C is 0.683, Pu 1.53 kN is 2.903 % of the 52.7 kN dynamic rating, and the 1400 g catalogue mass works out to roughly 23.333 g per millimetre of the 60 mm bore. Load balance for documentation: C0 36 kN against C 52.7 kN gives a 0.683 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Fatigue-limit check: Pu 1.53 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YAR 212-2RF — most belt-driven mounted-unit loads sit comfortably under 2.903 % of C. Rubberized-flinger note: the -2RF coated throwers are vulcanized assemblies — never lever or hammer against the flinger when mounting, and press only on the inner ring when the bearing is fitted loose before the housing cap closes, or the flinger lip folds inward and grinds on the inner ring. Set-screw geometry on this size: the two 120 deg screws bear on the 60 mm shaft inside the 65.1 mm total width while the outer ring is only 26 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "crusher and screen auxiliary shafts", "bulk-handling conveyor drives", "agricultural harvesting machinery" ], "failure_modes": [ "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "Do not specify the 60 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 39.7 mm s1 dimension is the screw seating geometry inside the 39.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Catalogue ratings belong to YAR 212-2RF as the grub two rf execution; other order numbers of the YAR 212 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-212-2RF?", "a": "Boundary dimensions: bore 60 mm, sphered OD 110 mm, overall width 65.1 mm; weight 1400 g. Loads: dynamic 52.7 kN, static 36 kN, fatigue 1.53 kN; the only published speed is the 1,800 r/min limiting value." }, { "q": "What does the designation YAR 212-2RF mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 212 carries the usual bore arithmetic — 60 mm (code 12 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. -2RF means an NBR contact lip plus a rubber-coated flinger at both sides, the catalogue step above -2F for wet, abrasive or washed-down environments." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAR-212-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 60x110x65.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 212-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-212-2RF", "YAR 212-2RF" ], "locale_variants": {} }, { "sku": "YAR-212-2F", "brand": "SKF", "manufacturer_designation": "YAR 212-2F", "series": "YAR2-series", "type": "insert", "d_mm": 60, "D_mm": 110, "B_mm": 65.1, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 52.7, "static_load_kN": 36, "fatigue_load_limit_kN": 1.53, "limiting_speed_rpm": 3400, "max_rpm": 3400, "weight_g": 1400, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAR 212-2F is a grub-screw insert bearing with the inner ring extended on both sides, 60x110x65.1 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. the size code 212 carries the usual bore arithmetic — 60 mm (code 12 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution. Envelope 60x110x65.1 mm (2.362x4.331x2.563 in), outer ring 26 mm wide, C 52.7 kN, C0 36 kN, Pu 1.53 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,400 r/min; mass 1400 g. At the printed limiting speed of 3,400 r/min the mean diameter dm = 85 mm implies dn about 2.89x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 75.6 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the plain flinger. Rating split for the maintenance file: dynamic 52.7 kN (L10), static 36 kN (s0 shock check), fatigue 1.53 kN (adjusted life) — three separate uses for YAR 212-2F, none interchangeable with another. Imperial procurement cross-check: 2.362 in bore, 4.331 in OD, 2.563 in overall width; the 1400 g mass converts to 1.400 kg (49.4 oz) for the bill of materials. Fillet discipline: the printed r_min 1.5 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 60x110 mm insert on its chamfer tilts the whole spherical seat. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Set-screw geometry on this size: the two 120 deg screws bear on the 60 mm shaft inside the 65.1 mm total width while the outer ring is only 26 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "agricultural harvesting machinery", "crusher and screen auxiliary shafts", "heavy fan and heater units" ], "failure_modes": [ "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "Do not specify the 60 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 39.7 mm s1 dimension is the screw seating geometry inside the 39.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Catalogue ratings belong to YAR 212-2F as the grub two f execution; other order numbers of the YAR 212 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-212-2F?", "a": "The catalogue envelope is 60x110x65.1 mm with a spherical outside surface; mass 1400 g. Ratings C 52.7/36 kN, Pu 1.53 kN, limiting speed 3,400 r/min." }, { "q": "What does the designation YAR 212-2F mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. the size code 212 carries the usual bore arithmetic — 60 mm (code 12 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." }, { "q": "How is YAR-212-2F lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." } ], "cross_ref": [ { "equiv_sku": "YAR-212-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 60x110x65.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 212-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-212-2F", "YAR 212-2F" ], "locale_variants": {} }, { "sku": "YAR-213-2RF", "brand": "SKF", "manufacturer_designation": "YAR 213-2RF", "series": "YAR2-series", "type": "insert", "d_mm": 65, "D_mm": 120, "B_mm": 68.3, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 57.2, "static_load_kN": 40, "fatigue_load_limit_kN": 1.7, "limiting_speed_rpm": 1600, "max_rpm": 1600, "weight_g": 1800, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 213-2RF is a SKF insert bearing (Y-bearing) for a 65 mm shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 120 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 213 carries the usual bore arithmetic — 65 mm (code 13 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. -2RF means an NBR contact lip plus a rubber-coated flinger at both sides, the catalogue step above -2F for wet, abrasive or washed-down environments. Envelope 65x120x68.3 mm (2.559x4.724x2.689 in), outer ring 27 mm wide, C 57.2 kN, C0 40 kN, Pu 1.7 kN. The catalogue publishes a single speed ceiling, the limiting speed: 1,600 r/min; mass 1800 g. Fillet discipline: the printed r_min 1.5 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 65x120 mm insert on its chamfer tilts the whole spherical seat. Pitch-diameter arithmetic: dm = (65+120)/2 = 92.5 mm; at the 1,600 r/min limiting speed the ball set runs at dn approx 1.48x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Selection figures for YAR 213-2RF: C0/C is 0.699, Pu 1.7 kN is 2.972 % of the 57.2 kN dynamic rating, and the 1800 g catalogue mass works out to roughly 27.692 g per millimetre of the 65 mm bore. The s1 42.9 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. At the printed limiting speed of 1,600 r/min the mean diameter dm = 92.5 mm implies dn about 1.48x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Rubberized-flinger note: the -2RF coated throwers are vulcanized assemblies — never lever or hammer against the flinger when mounting, and press only on the inner ring when the bearing is fitted loose before the housing cap closes, or the flinger lip folds inward and grinds on the inner ring. Set-screw geometry on this size: the two 120 deg screws bear on the 65 mm shaft inside the 68.3 mm total width while the outer ring is only 27 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "heavy fan and heater units", "crusher and screen auxiliary shafts", "bulk-handling conveyor drives" ], "failure_modes": [ "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "The 42.9 mm s1 dimension is the screw seating geometry inside the 41.3 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 65 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 57.2/40 kN figures belong specifically to YAR 213-2RF; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-213-2RF?", "a": "Boundary dimensions: bore 65 mm, sphered OD 120 mm, overall width 68.3 mm; weight 1800 g. Loads: dynamic 57.2 kN, static 40 kN, fatigue 1.7 kN; the only published speed is the 1,600 r/min limiting value." }, { "q": "What does the designation YAR 213-2RF mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 213 carries the usual bore arithmetic — 65 mm (code 13 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. -2RF means an NBR contact lip plus a rubber-coated flinger at both sides, the catalogue step above -2F for wet, abrasive or washed-down environments." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." }, { "q": "How is YAR-213-2RF lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." } ], "cross_ref": [ { "equiv_sku": "YAR-213-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 65x120x68.3 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 213-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-213-2RF", "YAR 213-2RF" ], "locale_variants": {} }, { "sku": "YAR-213-2F", "brand": "SKF", "manufacturer_designation": "YAR 213-2F", "series": "YAR2-series", "type": "insert", "d_mm": 65, "D_mm": 120, "B_mm": 68.3, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 57.2, "static_load_kN": 40, "fatigue_load_limit_kN": 1.7, "limiting_speed_rpm": 3000, "max_rpm": 3000, "weight_g": 1800, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 213-2F is a SKF insert bearing (Y-bearing) for a 65 mm shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 120 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 213 carries the usual bore arithmetic — 65 mm (code 13 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 65x120x68.3 mm (2.559x4.724x2.689 in), outer ring 27 mm wide, C 57.2 kN, C0 40 kN, Pu 1.7 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,000 r/min; mass 1800 g. Envelope arithmetic: the radial section from 65 mm bore to 120 mm OD is 27.5 mm; dividing C 57.2 kN by that section gives 2.08 kN per section millimetre, and the 68.3 mm overall width is 2.484x the section. Mass-to-load ratio for YAR-213-2F: 31.469 g of catalogue mass per rated kN of C, and 27.692 g per millimetre of bore — useful when comparing executions of the same 65x120 mm envelope on the drawing. Width accounting on this execution: 68.3 mm overall and 27 mm outer-ring width leave the housing designer 41.3 mm of inner-ring projection to accommodate the locking arrangement. Static-first planning: the 0.586 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 65 mm shaft, not the 57.2 kN L10 value. Grease-life arithmetic is dominated by speed: at dn approx 2.77x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Set-screw geometry on this size: the two 120 deg screws bear on the 65 mm shaft inside the 68.3 mm total width while the outer ring is only 27 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "heavy fan and heater units", "crusher and screen auxiliary shafts", "bulk-handling conveyor drives" ], "failure_modes": [ "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "relubricated with incompatible grease that hardens the factory fill and drags the seals" ], "pitfalls": [ "The 42.9 mm s1 dimension is the screw seating geometry inside the 41.3 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 65 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 57.2/40 kN figures belong specifically to YAR 213-2F; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-213-2F?", "a": "Boundary dimensions: bore 65 mm, sphered OD 120 mm, overall width 68.3 mm; weight 1800 g. Loads: dynamic 57.2 kN, static 40 kN, fatigue 1.7 kN; the only published speed is the 3,000 r/min limiting value." }, { "q": "What does the designation YAR 213-2F mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 213 carries the usual bore arithmetic — 65 mm (code 13 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAR-213-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 65x120x68.3 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 213-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-213-2F", "YAR 213-2F" ], "locale_variants": {} }, { "sku": "YAR-214-2F", "brand": "SKF", "manufacturer_designation": "YAR 214-2F", "series": "YAR2-series", "type": "insert", "d_mm": 70, "D_mm": 125, "B_mm": 69.9, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 62.4, "static_load_kN": 45, "fatigue_load_limit_kN": 1.86, "limiting_speed_rpm": 2800, "max_rpm": 2800, "weight_g": 1950, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 214-2F is a SKF insert bearing (Y-bearing) for a 70 mm shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 125 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 214 carries the usual bore arithmetic — 70 mm (code 14 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 70x125x69.9 mm (2.756x4.921x2.752 in), outer ring 28 mm wide, C 62.4 kN, C0 45 kN, Pu 1.86 kN. The catalogue publishes a single speed ceiling, the limiting speed: 2,800 r/min; mass 1950 g. Pitch-diameter arithmetic: dm = (70+125)/2 = 97.5 mm; at the 2,800 r/min limiting speed the ball set runs at dn approx 2.73x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Capacity density: 62.4 kN from 1.950 kg of bearing steel is about 32 kN per kilogram, and per width millimetre the 69.9 mm unit carries 0.893 kN of dynamic capacity. Bore-to-OD planning: OD 125 over bore 70 is a 1.786x step, while bore/overall-width gives 1.001; the spherical seat in the matching Y-housing must be specified to the 125 mm OD, not to a cylindrical housing bore. Fillet discipline: the printed r_min 1.5 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 70x125 mm insert on its chamfer tilts the whole spherical seat. At the printed limiting speed of 2,800 r/min the mean diameter dm = 97.5 mm implies dn about 2.73x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Service tip for YAR-214-2F: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 27.5 mm radial section.", "applications": [ "heavy fan and heater units", "agricultural harvesting machinery", "crusher and screen auxiliary shafts" ], "failure_modes": [ "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 39.7 mm s1 dimension is the screw seating geometry inside the 41.9 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 70 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Ordering discipline for the 70 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-214-2F?", "a": "Boundary dimensions: bore 70 mm, sphered OD 125 mm, overall width 69.9 mm; weight 1950 g. Loads: dynamic 62.4 kN, static 45 kN, fatigue 1.86 kN; the only published speed is the 2,800 r/min limiting value." }, { "q": "What does the designation YAR 214-2F mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 214 carries the usual bore arithmetic — 70 mm (code 14 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." }, { "q": "How is YAR-214-2F lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." } ], "cross_ref": [ { "equiv_sku": "YAR", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-214-2F", "YAR 214-2F" ], "locale_variants": {} }, { "sku": "YAR-215-2F", "brand": "SKF", "manufacturer_designation": "YAR 215-2F", "series": "YAR2-series", "type": "insert", "d_mm": 75, "D_mm": 130, "B_mm": 73.3, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 66.3, "static_load_kN": 49, "fatigue_load_limit_kN": 2.04, "limiting_speed_rpm": 2600, "max_rpm": 2600, "weight_g": 2150, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 215-2F is a SKF insert bearing (Y-bearing) for a 75 mm shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 130 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 215 carries the usual bore arithmetic — 75 mm (code 15 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 75x130x73.3 mm (2.953x5.118x2.886 in), outer ring 29 mm wide, C 66.3 kN, C0 49 kN, Pu 2.04 kN. The catalogue publishes a single speed ceiling, the limiting speed: 2,600 r/min; mass 2150 g. Capacity density: 66.3 kN from 2.150 kg of bearing steel is about 30.837 kN per kilogram, and per width millimetre the 73.3 mm unit carries 0.905 kN of dynamic capacity. Spherical-seat note in numbers: the 130 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 102.5 = 322.013 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. The s1 46.3 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Imperial procurement cross-check: 2.953 in bore, 5.118 in OD, 2.886 in overall width; the 2150 g mass converts to 2.150 kg (75.8 oz) for the bill of materials. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 92 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the plain flinger. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Service tip for YAR-215-2F: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 27.5 mm radial section.", "applications": [ "crusher and screen auxiliary shafts", "bulk-handling conveyor drives", "agricultural harvesting machinery" ], "failure_modes": [ "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "Do not specify the 75 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 46.3 mm s1 dimension is the screw seating geometry inside the 44.3 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Catalogue ratings belong to YAR 215-2F as the grub two f execution; other order numbers of the YAR 215 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-215-2F?", "a": "Boundary dimensions: bore 75 mm, sphered OD 130 mm, overall width 73.3 mm; weight 2150 g. Loads: dynamic 66.3 kN, static 49 kN, fatigue 2.04 kN; the only published speed is the 2,600 r/min limiting value." }, { "q": "What does the designation YAR 215-2F mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 215 carries the usual bore arithmetic — 75 mm (code 15 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." }, { "q": "How is YAR-215-2F lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." } ], "cross_ref": [ { "equiv_sku": "YAR-215-215-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 75x130x73.3 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 215-215-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 75 mm vs 74.6125 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-215-2F", "YAR 215-2F" ], "locale_variants": {} }, { "sku": "YAR-216-2F", "brand": "SKF", "manufacturer_designation": "YAR 216-2F", "series": "YAR2-series", "type": "insert", "d_mm": 80, "D_mm": 140, "B_mm": 77.8, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 72.8, "static_load_kN": 53, "fatigue_load_limit_kN": 2.16, "limiting_speed_rpm": 2400, "max_rpm": 2400, "weight_g": 2500, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 216-2F is a SKF insert bearing (Y-bearing) for a 80 mm shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 140 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 216 carries the usual bore arithmetic — 80 mm (code 16 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 80x140x77.8 mm (3.15x5.512x3.063 in), outer ring 30 mm wide, C 72.8 kN, C0 53 kN, Pu 2.16 kN. The catalogue publishes a single speed ceiling, the limiting speed: 2,400 r/min; mass 2500 g. Bore-to-OD planning: OD 140 over bore 80 is a 1.75x step, while bore/overall-width gives 1.028; the spherical seat in the matching Y-housing must be specified to the 140 mm OD, not to a cylindrical housing bore. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 97.4 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the plain flinger. Static-first planning: the 0.681 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 80 mm shaft, not the 72.8 kN L10 value. Width accounting on this execution: 77.8 mm overall and 30 mm outer-ring width leave the housing designer 47.8 mm of inner-ring projection to accommodate the locking arrangement. Load balance for documentation: C0 53 kN against C 72.8 kN gives a 0.728 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Service tip for YAR-216-2F: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 30 mm radial section.", "applications": [ "heavy fan and heater units", "crusher and screen auxiliary shafts", "bulk-handling conveyor drives" ], "failure_modes": [ "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 47.6 mm s1 dimension is the screw seating geometry inside the 47.8 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 80 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Ordering discipline for the 80 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-216-2F?", "a": "Boundary dimensions: bore 80 mm, sphered OD 140 mm, overall width 77.8 mm; weight 2500 g. Loads: dynamic 72.8 kN, static 53 kN, fatigue 2.16 kN; the only published speed is the 2,400 r/min limiting value." }, { "q": "What does the designation YAR 216-2F mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 216 carries the usual bore arithmetic — 80 mm (code 16 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." }, { "q": "How is YAR-216-2F lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." } ], "cross_ref": [ { "equiv_sku": "YAR", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-216-2F", "YAR 216-2F" ], "locale_variants": {} }, { "sku": "YAR-218-2F", "brand": "SKF", "manufacturer_designation": "YAR 218-2F", "series": "YAR2-series", "type": "insert", "d_mm": 90, "D_mm": 160, "B_mm": 89, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 95.6, "static_load_kN": 72, "fatigue_load_limit_kN": 2.7, "limiting_speed_rpm": 2000, "max_rpm": 2000, "weight_g": 4000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 218-2F is a SKF insert bearing (Y-bearing) for a 90 mm shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 160 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 218 carries the usual bore arithmetic — 90 mm (code 18 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 90x160x89 mm (3.543x6.299x3.504 in), outer ring 36 mm wide, C 95.6 kN, C0 72 kN, Pu 2.7 kN. The catalogue publishes a single speed ceiling, the limiting speed: 2,000 r/min; mass 4000 g. Load balance for documentation: C0 72 kN against C 95.6 kN gives a 0.753 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Width accounting on this execution: 89 mm overall and 36 mm outer-ring width leave the housing designer 53 mm of inner-ring projection to accommodate the locking arrangement. Imperial procurement cross-check: 3.543 in bore, 6.299 in OD, 3.504 in overall width; the 4000 g mass converts to 4.000 kg (141.1 oz) for the bill of materials. Envelope arithmetic: the radial section from 90 mm bore to 160 mm OD is 35 mm; dividing C 95.6 kN by that section gives 2.731 kN per section millimetre, and the 89 mm overall width is 2.543x the section. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 112 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the plain flinger. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Service tip for YAR-218-2F: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 35 mm radial section.", "applications": [ "bulk-handling conveyor drives", "agricultural harvesting machinery", "heavy fan and heater units" ], "failure_modes": [ "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "The 54 mm s1 dimension is the screw seating geometry inside the 53 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 90 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 95.6/72 kN figures belong specifically to YAR 218-2F; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-218-2F?", "a": "Boundary dimensions: bore 90 mm, sphered OD 160 mm, overall width 89 mm; weight 4000 g. Loads: dynamic 95.6 kN, static 72 kN, fatigue 2.7 kN; the only published speed is the 2,000 r/min limiting value." }, { "q": "What does the designation YAR 218-2F mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. the size code 218 carries the usual bore arithmetic — 90 mm (code 18 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." } ], "cross_ref": [ { "equiv_sku": "YAR", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-218-2F", "YAR 218-2F" ], "locale_variants": {} }, { "sku": "YAR-220-2F", "brand": "SKF", "manufacturer_designation": "YAR 220-2F", "series": "YAR2-series", "type": "insert", "d_mm": 100, "D_mm": 180, "B_mm": 98.4, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 124, "static_load_kN": 93, "fatigue_load_limit_kN": 3.35, "limiting_speed_rpm": 1900, "max_rpm": 1900, "weight_g": 5600, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAR 220-2F is a grub-screw insert bearing with the inner ring extended on both sides, 100x180x98.4 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. the size code 220 carries the usual bore arithmetic — 100 mm (code 20 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution. Envelope 100x180x98.4 mm (3.937x7.087x3.874 in), outer ring 40 mm wide, C 124 kN, C0 93 kN, Pu 3.35 kN. The catalogue publishes a single speed ceiling, the limiting speed: 1,900 r/min; mass 5600 g. Pitch-diameter arithmetic: dm = (100+180)/2 = 140 mm; at the 1,900 r/min limiting speed the ball set runs at dn approx 2.66x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Static-first planning: the 0.945 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 100 mm shaft, not the 124 kN L10 value. Rating split for the maintenance file: dynamic 124 kN (L10), static 93 kN (s0 shock check), fatigue 3.35 kN (adjusted life) — three separate uses for YAR 220-2F, none interchangeable with another. Bore-to-OD planning: OD 180 over bore 100 is a 1.8x step, while bore/overall-width gives 1.016; the spherical seat in the matching Y-housing must be specified to the 180 mm OD, not to a cylindrical housing bore. Width accounting on this execution: 98.4 mm overall and 40 mm outer-ring width leave the housing designer 58.4 mm of inner-ring projection to accommodate the locking arrangement. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Set-screw geometry on this size: the two 120 deg screws bear on the 100 mm shaft inside the 98.4 mm total width while the outer ring is only 40 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "large bulk-material conveyors", "quarry feeder and pick-up shafts" ], "failure_modes": [ "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "Do not specify the 100 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 63.4 mm s1 dimension is the screw seating geometry inside the 58.4 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Catalogue ratings belong to YAR 220-2F as the grub two f execution; other order numbers of the YAR 220 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-220-2F?", "a": "The catalogue envelope is 100x180x98.4 mm with a spherical outside surface; mass 5600 g. Ratings C 124/93 kN, Pu 3.35 kN, limiting speed 1,900 r/min." }, { "q": "What does the designation YAR 220-2F mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. the size code 220 carries the usual bore arithmetic — 100 mm (code 20 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." } ], "cross_ref": [ { "equiv_sku": "YAR", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-220-2F", "YAR 220-2F" ], "locale_variants": {} }, { "sku": "YAR-203-008-2F", "brand": "SKF", "manufacturer_designation": "YAR 203-008-2F", "series": "YAR2-series", "type": "insert", "d_mm": 12.7, "D_mm": 40, "B_mm": 27.4, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 9.56, "static_load_kN": 4.75, "fatigue_load_limit_kN": 0.2, "limiting_speed_rpm": 9500, "max_rpm": 9500, "weight_g": 120, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 203-008-2F is a SKF insert bearing (Y-bearing) for a 12.7 mm (0.5 in) shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 40 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -008 decodes as 0\" +8/16, i.e. 12.7 mm; the metric coded size YAR 203 shares the same envelope but its bore is the metric value, not this one. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 12.7x40x27.4 mm (0.5x1.575x1.079 in), outer ring 12 mm wide, C 9.56 kN, C0 4.75 kN, Pu 0.2 kN. The catalogue publishes a single speed ceiling, the limiting speed: 9,500 r/min; mass 120 g. Speed ceiling of 9,500 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Bore-to-OD planning: OD 40 over bore 12.7 is a 3.15x step, while bore/overall-width gives 0.464; the spherical seat in the matching Y-housing must be specified to the 40 mm OD, not to a cylindrical housing bore. Pitch-diameter arithmetic: dm = (12.7+40)/2 = 26.35 mm; at the 9,500 r/min limiting speed the ball set runs at dn approx 2.50x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Load balance for documentation: C0 4.75 kN against C 9.56 kN gives a 0.497 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Mass-to-load ratio for YAR-203-008-2F: 12.552 g of catalogue mass per rated kN of C, and 9.449 g per millimetre of bore — useful when comparing executions of the same 12.7x40 mm envelope on the drawing. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Service tip for YAR-203-008-2F: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 13.65 mm radial section.", "applications": [ "fan and blower pillow blocks", "textile machinery rollers", "light conveyors and small belt take-ups" ], "failure_modes": [ "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "relubricated with incompatible grease that hardens the factory fill and drags the seals" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 12.7 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 15.9 mm s1 dimension is the screw seating geometry inside the 15.4 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Ordering discipline for the 12.7 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-203-008-2F?", "a": "Boundary dimensions: bore 12.7 mm, sphered OD 40 mm, overall width 27.4 mm; weight 120 g. Loads: dynamic 9.56 kN, static 4.75 kN, fatigue 0.2 kN; the only published speed is the 9,500 r/min limiting value." }, { "q": "What does the designation YAR 203-008-2F mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -008 decodes as 0\" +8/16, i.e. 12.7 mm; the metric coded size YAR 203 shares the same envelope but its bore is the metric value, not this one. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "How do the set screws lock the 12.7 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." } ], "cross_ref": [ { "equiv_sku": "YAR", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-203-008-2F", "YAR 203-008-2F" ], "locale_variants": {} }, { "sku": "YAT-203-010", "brand": "SKF", "manufacturer_designation": "YAT 203-010", "series": "YAR2-series", "type": "insert", "d_mm": 15.875, "D_mm": 40, "B_mm": 22.1, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 9.56, "static_load_kN": 4.75, "fatigue_load_limit_kN": 0.2, "limiting_speed_rpm": 9500, "max_rpm": 9500, "weight_g": 90, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YAT 203-010 is SKF's 15.875 mm-bore grub-screw insert bearing with the inner ring extended on one side in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 15.875x40x22.1 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAT prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring is extended on one side only. the three-digit -010 tail codes the bore in inches for inch-shaft bearings: 0 whole inch 10/16 in = 15.875 mm (first digit whole inches, next two sixteenths of an inch). this suffix-free execution is listed without the sealed external design: the 22.1 mm width is the one-side-extended inner ring alone, so protection depends on the housing seals and the relubrication routine rather than bearing-mounted contact seals. Envelope 15.875x40x22.1 mm (0.625x1.575x0.87 in), outer ring 12 mm wide, C 9.56 kN, C0 4.75 kN, Pu 0.2 kN. The catalogue publishes a single speed ceiling, the limiting speed: 9,500 r/min; mass 90 g. Pitch-diameter arithmetic: dm = (15.875+40)/2 = 27.938 mm; at the 9,500 r/min limiting speed the ball set runs at dn approx 2.65x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Spherical-seat note in numbers: the 40 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 27.938 = 87.77 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Fatigue-limit check: Pu 0.2 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YAT 203-010 — most belt-driven mounted-unit loads sit comfortably under 2.092 % of C. Bore-to-OD planning: OD 40 over bore 15.875 is a 2.52x step, while bore/overall-width gives 0.718; the spherical seat in the matching Y-housing must be specified to the 40 mm OD, not to a cylindrical housing bore. Speed ceiling of 9,500 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Single-extension fitting note: with the inner ring extended only on the locking side, orient the open (non-extended) face toward the shaft step or housing shoulder as the drawing shows — reversed, the set screws end up unsupported by the abutment and the shortened side offers no seal land at all. Set-screw geometry on this size: the two 120 deg screws bear on the 15.875 mm shaft inside the 22.1 mm total width while the outer ring is only 12 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "textile machinery rollers", "light conveyors and small belt take-ups", "fan and blower pillow blocks" ], "failure_modes": [ "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "Replacement discipline: a one-side YAT insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 15.9 mm s1 dimension is the screw seating geometry inside the 10.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 15.875 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Ordering discipline for the 15.875 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAT-203-010?", "a": "YAT 203-010 measures 15.875 mm bore x 40 mm OD x 22.1 mm overall width (outer ring 12 mm wide), 0.625 x 1.575 x 0.87 in; mass about 90 g. SKF 17000 ratings: C 9.56 kN, C0 4.75 kN, Pu 0.2 kN, limiting speed 9,500 r/min." }, { "q": "What does the designation YAT 203-010 mean?", "a": "the YAT prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring is extended on one side only. the three-digit -010 tail codes the bore in inches for inch-shaft bearings: 0 whole inch 10/16 in = 15.875 mm (first digit whole inches, next two sixteenths of an inch). this suffix-free execution is listed without the sealed external design: the 22.1 mm width is the one-side-extended inner ring alone, so protection depends on the housing seals and the relubrication routine rather than bearing-mounted contact seals." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." }, { "q": "How is YAT-203-010 lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." } ], "cross_ref": [ { "equiv_sku": "YAT", "equiv_brand": "ISO 15", "level": "full", "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAT-203-010", "YAT 203-010" ], "locale_variants": {} }, { "sku": "YAR-203-010-2F", "brand": "SKF", "manufacturer_designation": "YAR 203-010-2F", "series": "YAR2-series", "type": "insert", "d_mm": 15.875, "D_mm": 40, "B_mm": 27.4, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 9.56, "static_load_kN": 4.75, "fatigue_load_limit_kN": 0.2, "limiting_speed_rpm": 9500, "max_rpm": 9500, "weight_g": 100, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAR 203-010-2F is a grub-screw insert bearing with the inner ring extended on both sides, 15.875x40x27.4 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -010 = 15.875 mm, which is why this row sits beside, not on, the metric bore size. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution. Envelope 15.875x40x27.4 mm (0.625x1.575x1.079 in), outer ring 12 mm wide, C 9.56 kN, C0 4.75 kN, Pu 0.2 kN. The catalogue publishes a single speed ceiling, the limiting speed: 9,500 r/min; mass 100 g. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 24.2 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the plain flinger. Selection figures for YAR 203-010-2F: C0/C is 0.497, Pu 0.2 kN is 2.092 % of the 9.56 kN dynamic rating, and the 100 g catalogue mass works out to roughly 6.299 g per millimetre of the 15.875 mm bore. Capacity density: 9.56 kN from 0.100 kg of bearing steel is about 95.6 kN per kilogram, and per width millimetre the 27.4 mm unit carries 0.349 kN of dynamic capacity. Load balance for documentation: C0 4.75 kN against C 9.56 kN gives a 0.497 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Imperial procurement cross-check: 0.625 in bore, 1.575 in OD, 1.079 in overall width; the 100 g mass converts to 0.100 kg (3.5 oz) for the bill of materials. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Set-screw geometry on this size: the two 120 deg screws bear on the 15.875 mm shaft inside the 27.4 mm total width while the outer ring is only 12 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "small agricultural augers", "textile machinery rollers", "fan and blower pillow blocks" ], "failure_modes": [ "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "Do not specify the 15.875 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 15.9 mm s1 dimension is the screw seating geometry inside the 15.4 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Catalogue ratings belong to YAR 203-010-2F as the grub two f execution; other order numbers of the YAR 203-010 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-203-010-2F?", "a": "The catalogue envelope is 15.875x40x27.4 mm with a spherical outside surface; mass 100 g. Ratings C 9.56/4.75 kN, Pu 0.2 kN, limiting speed 9,500 r/min." }, { "q": "What does the designation YAR 203-010-2F mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -010 = 15.875 mm, which is why this row sits beside, not on, the metric bore size. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution." }, { "q": "How do the set screws lock the 15.875 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." } ], "cross_ref": [ { "equiv_sku": "YAR", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-203-010-2F", "YAR 203-010-2F" ], "locale_variants": {} }, { "sku": "YAT-204-012", "brand": "SKF", "manufacturer_designation": "YAT 204-012", "series": "YAR2-series", "type": "insert", "d_mm": 19.049999999999997, "D_mm": 47, "B_mm": 25.5, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 12.7, "static_load_kN": 6.55, "fatigue_load_limit_kN": 0.28, "limiting_speed_rpm": 8500, "max_rpm": 8500, "weight_g": 140, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAT 204-012 is a grub-screw insert bearing with the inner ring extended on one side, 19.049999999999997x47x25.5 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAT is SKF's grub-screw insert design — a single extended inner-ring side housing the two 120 deg set screws. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -012 = 19.05 mm, which is why this row sits beside, not on, the metric bore size. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units. Envelope 19.049999999999997x47x25.5 mm (0.75x1.85x1.004 in), outer ring 14 mm wide, C 12.7 kN, C0 6.55 kN, Pu 0.28 kN. The catalogue publishes a single speed ceiling, the limiting speed: 8,500 r/min; mass 140 g. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 28.2 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the inner flinger. Capacity density: 12.7 kN from 0.140 kg of bearing steel is about 90.714 kN per kilogram, and per width millimetre the 25.5 mm unit carries 0.498 kN of dynamic capacity. Width accounting on this execution: 25.5 mm overall and 14 mm outer-ring width leave the housing designer 11.5 mm of inner-ring projection to accommodate the locking arrangement. The s1 18.3 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Selection figures for YAT 204-012: C0/C is 0.516, Pu 0.28 kN is 2.205 % of the 12.7 kN dynamic rating, and the 140 g catalogue mass works out to roughly 7.349 g per millimetre of the 19.049999999999997 mm bore. Single-extension fitting note: with the inner ring extended only on the locking side, orient the open (non-extended) face toward the shaft step or housing shoulder as the drawing shows — reversed, the set screws end up unsupported by the abutment and the shortened side offers no seal land at all. Set-screw geometry on this size: the two 120 deg screws bear on the 19.049999999999997 mm shaft inside the 25.5 mm total width while the outer ring is only 14 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "small agricultural augers", "textile machinery rollers", "fan and blower pillow blocks" ], "failure_modes": [ "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "Do not specify the 19.049999999999997 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a one-side YAT insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 18.3 mm s1 dimension is the screw seating geometry inside the 11.5 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Catalogue ratings belong to YAT 204-012 as the grub one open execution; other order numbers of the YAT 204-012 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAT-204-012?", "a": "The catalogue envelope is 19.049999999999997x47x25.5 mm with a spherical outside surface; mass 140 g. Ratings C 12.7/6.55 kN, Pu 0.28 kN, limiting speed 8,500 r/min." }, { "q": "What does the designation YAT 204-012 mean?", "a": "YAT is SKF's grub-screw insert design — a single extended inner-ring side housing the two 120 deg set screws. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -012 = 19.05 mm, which is why this row sits beside, not on, the metric bore size. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." }, { "q": "How is YAT-204-012 lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." } ], "cross_ref": [ { "equiv_sku": "YAT", "equiv_brand": "ISO 15", "level": "full", "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAT-204-012", "YAT 204-012" ], "locale_variants": {} }, { "sku": "YAR-204-012-2RF-HV", "brand": "SKF", "manufacturer_designation": "YAR 204-012-2RF/HV", "series": "YAR2-series", "type": "insert", "d_mm": 19.049999999999997, "D_mm": 47, "B_mm": 31, "material": "SS440C", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 10.8, "static_load_kN": 6.55, "fatigue_load_limit_kN": 0.28, "limiting_speed_rpm": 5000, "max_rpm": 5000, "weight_g": 160, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 204-012-2RF/HV is a SKF insert bearing (Y-bearing) for a 19.049999999999997 mm (0.75 in) shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 47 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -012 decodes as 0\" +12/16, i.e. 19.05 mm; the metric coded size YAR 204 shares the same envelope but its bore is the metric value, not this one. the HV suffix means stainless rings and balls with food-grade compliant seals and grease; capacity is derated versus the carbon-steel part. Envelope 19.049999999999997x47x31 mm (0.75x1.85x1.22 in), outer ring 14 mm wide, C 10.8 kN, C0 6.55 kN, Pu 0.28 kN. The catalogue publishes a single speed ceiling, the limiting speed: 5,000 r/min; mass 160 g. Spherical-seat note in numbers: the 47 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 33.025 = 103.751 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Selection figures for YAR 204-012-2RF/HV: C0/C is 0.606, Pu 0.28 kN is 2.593 % of the 10.8 kN dynamic rating, and the 160 g catalogue mass works out to roughly 8.399 g per millimetre of the 19.049999999999997 mm bore. Static-first planning: the 0.211 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 19.049999999999997 mm shaft, not the 10.8 kN L10 value. Pitch-diameter arithmetic: dm = (19.049999999999997+47)/2 = 33.025 mm; at the 5,000 r/min limiting speed the ball set runs at dn approx 1.65x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Fatigue-limit check: Pu 0.28 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YAR 204-012-2RF/HV — most belt-driven mounted-unit loads sit comfortably under 2.593 % of C. Stainless food-range note: HV parts trade some capacity for corrosion resistance and food-compatible lubrication, and the printed limiting speed is set for that fill; do not top up with ordinary mineral grease in service — mixing greases can harden the food-grade fill and seize the seals. Service tip for YAR-204-012-2RF-HV: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 13.975 mm radial section.", "applications": [ "light conveyors and small belt take-ups", "small agricultural augers", "textile machinery rollers" ], "failure_modes": [ "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "The 18.3 mm s1 dimension is the screw seating geometry inside the 17 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 19.049999999999997 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 10.8/6.55 kN figures belong specifically to YAR 204-012-2RF/HV; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-204-012-2RF-HV?", "a": "Boundary dimensions: bore 19.049999999999997 mm, sphered OD 47 mm, overall width 31 mm; weight 160 g. Loads: dynamic 10.8 kN, static 6.55 kN, fatigue 0.28 kN; the only published speed is the 5,000 r/min limiting value." }, { "q": "What does the designation YAR 204-012-2RF/HV mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -012 decodes as 0\" +12/16, i.e. 19.05 mm; the metric coded size YAR 204 shares the same envelope but its bore is the metric value, not this one. the HV suffix means stainless rings and balls with food-grade compliant seals and grease; capacity is derated versus the carbon-steel part." }, { "q": "How do the set screws lock the 19.049999999999997 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." } ], "cross_ref": [ { "equiv_sku": "YAR-204-012-2RFGR-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 19.049999999999997x47x31 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 204-012-2RFGR/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-204-012-2RF", "equiv_brand": "SKF", "level": "partial", "note": "Same 19.049999999999997x47x31 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (10.8/6.55 kN vs 12.7/6.55 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-204-012-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 19.049999999999997x47x31 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (10.8/6.55 kN vs 12.7/6.55 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-204-012-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 19.049999999999997x47x31 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (10.8/6.55 kN vs 12.7/6.55 kN) — envelope match, not a load-rating equivalent." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-204-012-2RF-HV", "YAR 204-012-2RF/HV" ], "locale_variants": {} }, { "sku": "YAR-204-012-2RFGR-HV", "brand": "SKF", "manufacturer_designation": "YAR 204-012-2RFGR/HV", "series": "YAR2-series", "type": "insert", "d_mm": 19.049999999999997, "D_mm": 47, "B_mm": 31, "material": "SS440C", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 10.8, "static_load_kN": 6.55, "fatigue_load_limit_kN": 0.28, "limiting_speed_rpm": 5000, "max_rpm": 5000, "weight_g": 160, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAR 204-012-2RFGR/HV is a grub-screw insert bearing with the inner ring extended on both sides, 19.049999999999997x47x31 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -012 = 19.05 mm, which is why this row sits beside, not on, the metric bore size. HV is the corrosion-resistant food-range variant of the -2RF sealed design — stainless parts plus food-compatible rubber and lubricant, which also explains its lower published C and limiting speed. Envelope 19.049999999999997x47x31 mm (0.75x1.85x1.22 in), outer ring 14 mm wide, C 10.8 kN, C0 6.55 kN, Pu 0.28 kN. The catalogue publishes a single speed ceiling, the limiting speed: 5,000 r/min; mass 160 g. Load balance for documentation: C0 6.55 kN against C 10.8 kN gives a 0.606 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Selection figures for YAR 204-012-2RFGR/HV: C0/C is 0.606, Pu 0.28 kN is 2.593 % of the 10.8 kN dynamic rating, and the 160 g catalogue mass works out to roughly 8.399 g per millimetre of the 19.049999999999997 mm bore. Mass-to-load ratio for YAR-204-012-2RFGR-HV: 14.815 g of catalogue mass per rated kN of C, and 8.399 g per millimetre of bore — useful when comparing executions of the same 19.049999999999997x47 mm envelope on the drawing. Bore-to-OD planning: OD 47 over bore 19.049999999999997 is a 2.467x step, while bore/overall-width gives 0.615; the spherical seat in the matching Y-housing must be specified to the 47 mm OD, not to a cylindrical housing bore. Speed ceiling of 5,000 r/min is the catalogue mechanical limit for THIS execution; the stainless/food-grade HV fill sets this lower value, so real fan duty is planned well below it. Stainless food-range note: HV parts trade some capacity for corrosion resistance and food-compatible lubrication, and the printed limiting speed is set for that fill; do not top up with ordinary mineral grease in service — mixing greases can harden the food-grade fill and seize the seals. Set-screw geometry on this size: the two 120 deg screws bear on the 19.049999999999997 mm shaft inside the 31 mm total width while the outer ring is only 14 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "light conveyors and small belt take-ups", "small agricultural augers", "textile machinery rollers" ], "failure_modes": [ "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "Do not specify the 19.049999999999997 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 18.3 mm s1 dimension is the screw seating geometry inside the 17 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Catalogue ratings belong to YAR 204-012-2RFGR/HV as the grub two hv execution; other order numbers of the YAR 204-012 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-204-012-2RFGR-HV?", "a": "The catalogue envelope is 19.049999999999997x47x31 mm with a spherical outside surface; mass 160 g. Ratings C 10.8/6.55 kN, Pu 0.28 kN, limiting speed 5,000 r/min." }, { "q": "What does the designation YAR 204-012-2RFGR/HV mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -012 = 19.05 mm, which is why this row sits beside, not on, the metric bore size. HV is the corrosion-resistant food-range variant of the -2RF sealed design — stainless parts plus food-compatible rubber and lubricant, which also explains its lower published C and limiting speed." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAR-204-012-2RF-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 19.049999999999997x47x31 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 204-012-2RF/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-204-012-2RF", "equiv_brand": "SKF", "level": "partial", "note": "Same 19.049999999999997x47x31 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (10.8/6.55 kN vs 12.7/6.55 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-204-012-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 19.049999999999997x47x31 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (10.8/6.55 kN vs 12.7/6.55 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-204-012-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 19.049999999999997x47x31 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (10.8/6.55 kN vs 12.7/6.55 kN) — envelope match, not a load-rating equivalent." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-204-012-2RFGR-HV", "YAR 204-012-2RFGR/HV" ], "locale_variants": {} }, { "sku": "YAR-204-012-2RF", "brand": "SKF", "manufacturer_designation": "YAR 204-012-2RF", "series": "YAR2-series", "type": "insert", "d_mm": 19.049999999999997, "D_mm": 47, "B_mm": 31, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 12.7, "static_load_kN": 6.55, "fatigue_load_limit_kN": 0.28, "limiting_speed_rpm": 5000, "max_rpm": 5000, "weight_g": 160, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 204-012-2RF is a SKF insert bearing (Y-bearing) for a 19.049999999999997 mm (0.75 in) shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 47 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -012 decodes as 0\" +12/16, i.e. 19.05 mm; the metric coded size YAR 204 shares the same envelope but its bore is the metric value, not this one. -2RF means an NBR contact lip plus a rubber-coated flinger at both sides, the catalogue step above -2F for wet, abrasive or washed-down environments. Envelope 19.049999999999997x47x31 mm (0.75x1.85x1.22 in), outer ring 14 mm wide, C 12.7 kN, C0 6.55 kN, Pu 0.28 kN. The catalogue publishes a single speed ceiling, the limiting speed: 5,000 r/min; mass 160 g. Grease-life arithmetic is dominated by speed: at dn approx 1.65x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Load balance for documentation: C0 6.55 kN against C 12.7 kN gives a 0.516 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Pitch-diameter arithmetic: dm = (19.049999999999997+47)/2 = 33.025 mm; at the 5,000 r/min limiting speed the ball set runs at dn approx 1.65x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. The s1 18.3 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Imperial procurement cross-check: 0.75 in bore, 1.85 in OD, 1.22 in overall width; the 160 g mass converts to 0.160 kg (5.6 oz) for the bill of materials. Rubberized-flinger note: the -2RF coated throwers are vulcanized assemblies — never lever or hammer against the flinger when mounting, and press only on the inner ring when the bearing is fitted loose before the housing cap closes, or the flinger lip folds inward and grinds on the inner ring. Service tip for YAR-204-012-2RF: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 13.975 mm radial section.", "applications": [ "small agricultural augers", "light conveyors and small belt take-ups", "textile machinery rollers" ], "failure_modes": [ "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "The 18.3 mm s1 dimension is the screw seating geometry inside the 17 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 19.049999999999997 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 12.7/6.55 kN figures belong specifically to YAR 204-012-2RF; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-204-012-2RF?", "a": "Boundary dimensions: bore 19.049999999999997 mm, sphered OD 47 mm, overall width 31 mm; weight 160 g. Loads: dynamic 12.7 kN, static 6.55 kN, fatigue 0.28 kN; the only published speed is the 5,000 r/min limiting value." }, { "q": "What does the designation YAR 204-012-2RF mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -012 decodes as 0\" +12/16, i.e. 19.05 mm; the metric coded size YAR 204 shares the same envelope but its bore is the metric value, not this one. -2RF means an NBR contact lip plus a rubber-coated flinger at both sides, the catalogue step above -2F for wet, abrasive or washed-down environments." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAR-204-012-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 19.049999999999997x47x31 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (12.7/6.55 kN vs 10.8/6.55 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-204-012-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 19.049999999999997x47x31 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (12.7/6.55 kN vs 10.8/6.55 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-204-012-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 19.049999999999997x47x31 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 204-012-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-204-012-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 19.049999999999997x47x31 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 204-012-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-204-012-2RF", "YAR 204-012-2RF" ], "locale_variants": {} }, { "sku": "YAR-204-012-2RF-VE495", "brand": "SKF", "manufacturer_designation": "YAR 204-012-2RF/VE495", "series": "YAR2-series", "type": "insert", "d_mm": 19.049999999999997, "D_mm": 47, "B_mm": 31, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 12.7, "static_load_kN": 6.55, "fatigue_load_limit_kN": 0.28, "limiting_speed_rpm": 5000, "max_rpm": 5000, "weight_g": 160, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 204-012-2RF/VE495 is a SKF insert bearing (Y-bearing) for a 19.049999999999997 mm (0.75 in) shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 47 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -012 decodes as 0\" +12/16, i.e. 19.05 mm; the metric coded size YAR 204 shares the same envelope but its bore is the metric value, not this one. the VE495 suffix packages zinc-coated rings with stainless-reinforced food-grade seals/flingers and food-grade lubricant — the wash-down-resistant counterpart of the standard -2RF bearing. Envelope 19.049999999999997x47x31 mm (0.75x1.85x1.22 in), outer ring 14 mm wide, C 12.7 kN, C0 6.55 kN, Pu 0.28 kN. The catalogue publishes a single speed ceiling, the limiting speed: 5,000 r/min; mass 160 g. Rating split for the maintenance file: dynamic 12.7 kN (L10), static 6.55 kN (s0 shock check), fatigue 0.28 kN (adjusted life) — three separate uses for YAR 204-012-2RF/VE495, none interchangeable with another. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 28.2 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the inner flinger. Grease-life arithmetic is dominated by speed: at dn approx 1.65x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Static-first planning: the 0.211 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 19.049999999999997 mm shaft, not the 12.7 kN L10 value. At the printed limiting speed of 5,000 r/min the mean diameter dm = 33.025 mm implies dn about 1.65x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Zinc-coated food-range note: the VE495 plating is a functional surface, not cosmetic; clean the bore and shaft WITHOUT steel brushes or aggressive descalers, mount dry or with the approved food-grade mounting paste, and touch up damaged plating spots before commissioning the wash-down area. Set-screw geometry on this size: the two 120 deg screws bear on the 19.049999999999997 mm shaft inside the 31 mm total width while the outer ring is only 14 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "small agricultural augers", "fan and blower pillow blocks", "textile machinery rollers" ], "failure_modes": [ "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 19.049999999999997 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 18.3 mm s1 dimension is the screw seating geometry inside the 17 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Ordering discipline for the 19.049999999999997 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-204-012-2RF-VE495?", "a": "Boundary dimensions: bore 19.049999999999997 mm, sphered OD 47 mm, overall width 31 mm; weight 160 g. Loads: dynamic 12.7 kN, static 6.55 kN, fatigue 0.28 kN; the only published speed is the 5,000 r/min limiting value." }, { "q": "What does the designation YAR 204-012-2RF/VE495 mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -012 decodes as 0\" +12/16, i.e. 19.05 mm; the metric coded size YAR 204 shares the same envelope but its bore is the metric value, not this one. the VE495 suffix packages zinc-coated rings with stainless-reinforced food-grade seals/flingers and food-grade lubricant — the wash-down-resistant counterpart of the standard -2RF bearing." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." }, { "q": "How is YAR-204-012-2RF-VE495 lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." } ], "cross_ref": [ { "equiv_sku": "YAR-204-012-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 19.049999999999997x47x31 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (12.7/6.55 kN vs 10.8/6.55 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-204-012-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 19.049999999999997x47x31 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (12.7/6.55 kN vs 10.8/6.55 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-204-012-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 19.049999999999997x47x31 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 204-012-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-204-012-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 19.049999999999997x47x31 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 204-012-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-204-012-2RF-VE495", "YAR 204-012-2RF/VE495" ], "locale_variants": {} }, { "sku": "YAR-204-012-2F", "brand": "SKF", "manufacturer_designation": "YAR 204-012-2F", "series": "YAR2-series", "type": "insert", "d_mm": 19.049999999999997, "D_mm": 47, "B_mm": 31, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 12.7, "static_load_kN": 6.55, "fatigue_load_limit_kN": 0.28, "limiting_speed_rpm": 8500, "max_rpm": 8500, "weight_g": 160, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 204-012-2F is a SKF insert bearing (Y-bearing) for a 19.049999999999997 mm (0.75 in) shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 47 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -012 decodes as 0\" +12/16, i.e. 19.05 mm; the metric coded size YAR 204 shares the same envelope but its bore is the metric value, not this one. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 19.049999999999997x47x31 mm (0.75x1.85x1.22 in), outer ring 14 mm wide, C 12.7 kN, C0 6.55 kN, Pu 0.28 kN. The catalogue publishes a single speed ceiling, the limiting speed: 8,500 r/min; mass 160 g. Width accounting on this execution: 31 mm overall and 14 mm outer-ring width leave the housing designer 17 mm of inner-ring projection to accommodate the locking arrangement. The s1 18.3 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Static-first planning: the 0.211 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 19.049999999999997 mm shaft, not the 12.7 kN L10 value. Spherical-seat note in numbers: the 47 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 33.025 = 103.751 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Load balance for documentation: C0 6.55 kN against C 12.7 kN gives a 0.516 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Service tip for YAR-204-012-2F: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 13.975 mm radial section.", "applications": [ "fan and blower pillow blocks", "light conveyors and small belt take-ups", "small agricultural augers" ], "failure_modes": [ "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "relubricated with incompatible grease that hardens the factory fill and drags the seals" ], "pitfalls": [ "Do not specify the 19.049999999999997 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 18.3 mm s1 dimension is the screw seating geometry inside the 17 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Catalogue ratings belong to YAR 204-012-2F as the grub two f execution; other order numbers of the YAR 204-012 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-204-012-2F?", "a": "Boundary dimensions: bore 19.049999999999997 mm, sphered OD 47 mm, overall width 31 mm; weight 160 g. Loads: dynamic 12.7 kN, static 6.55 kN, fatigue 0.28 kN; the only published speed is the 8,500 r/min limiting value." }, { "q": "What does the designation YAR 204-012-2F mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -012 decodes as 0\" +12/16, i.e. 19.05 mm; the metric coded size YAR 204 shares the same envelope but its bore is the metric value, not this one. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "How do the set screws lock the 19.049999999999997 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." } ], "cross_ref": [ { "equiv_sku": "YAR-204-012-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 19.049999999999997x47x31 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (12.7/6.55 kN vs 10.8/6.55 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-204-012-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 19.049999999999997x47x31 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (12.7/6.55 kN vs 10.8/6.55 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-204-012-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 19.049999999999997x47x31 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 204-012-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-204-012-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 19.049999999999997x47x31 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 204-012-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-204-012-2F", "YAR 204-012-2F" ], "locale_variants": {} }, { "sku": "YAT-205-014", "brand": "SKF", "manufacturer_designation": "YAT 205-014", "series": "YAR2-series", "type": "insert", "d_mm": 22.224999999999998, "D_mm": 52, "B_mm": 27.2, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 14, "static_load_kN": 7.8, "fatigue_load_limit_kN": 0.335, "limiting_speed_rpm": 7000, "max_rpm": 7000, "weight_g": 190, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YAT 205-014 is SKF's 22.224999999999998 mm-bore grub-screw insert bearing with the inner ring extended on one side in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 22.224999999999998x52x27.2 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAT prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring is extended on one side only. the three-digit -014 tail codes the bore in inches for inch-shaft bearings: 0 whole inch 14/16 in = 22.225 mm (first digit whole inches, next two sixteenths of an inch). this suffix-free execution is listed without the sealed external design: the 27.2 mm width is the one-side-extended inner ring alone, so protection depends on the housing seals and the relubrication routine rather than bearing-mounted contact seals. Envelope 22.224999999999998x52x27.2 mm (0.875x2.047x1.071 in), outer ring 15 mm wide, C 14 kN, C0 7.8 kN, Pu 0.335 kN. The catalogue publishes a single speed ceiling, the limiting speed: 7,000 r/min; mass 190 g. Fillet discipline: the printed r_min 0.6 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 22.224999999999998x52 mm insert on its chamfer tilts the whole spherical seat. Pitch-diameter arithmetic: dm = (22.224999999999998+52)/2 = 37.112 mm; at the 7,000 r/min limiting speed the ball set runs at dn approx 2.60x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Capacity density: 14 kN from 0.190 kg of bearing steel is about 73.684 kN per kilogram, and per width millimetre the 27.2 mm unit carries 0.515 kN of dynamic capacity. Imperial procurement cross-check: 0.875 in bore, 2.047 in OD, 1.071 in overall width; the 190 g mass converts to 0.190 kg (6.7 oz) for the bill of materials. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 33.7 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the inner flinger. Single-extension fitting note: with the inner ring extended only on the locking side, orient the open (non-extended) face toward the shaft step or housing shoulder as the drawing shows — reversed, the set screws end up unsupported by the abutment and the shortened side offers no seal land at all. Set-screw geometry on this size: the two 120 deg screws bear on the 22.224999999999998 mm shaft inside the 27.2 mm total width while the outer ring is only 15 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "ventilation and extraction fans", "trough conveyor idler drives", "small packaging and labelling machines" ], "failure_modes": [ "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "Replacement discipline: a one-side YAT insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 19.5 mm s1 dimension is the screw seating geometry inside the 12.2 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 22.224999999999998 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Ordering discipline for the 22.224999999999998 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAT-205-014?", "a": "YAT 205-014 measures 22.224999999999998 mm bore x 52 mm OD x 27.2 mm overall width (outer ring 15 mm wide), 0.875 x 2.047 x 1.071 in; mass about 190 g. SKF 17000 ratings: C 14 kN, C0 7.8 kN, Pu 0.335 kN, limiting speed 7,000 r/min." }, { "q": "What does the designation YAT 205-014 mean?", "a": "the YAT prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring is extended on one side only. the three-digit -014 tail codes the bore in inches for inch-shaft bearings: 0 whole inch 14/16 in = 22.225 mm (first digit whole inches, next two sixteenths of an inch). this suffix-free execution is listed without the sealed external design: the 27.2 mm width is the one-side-extended inner ring alone, so protection depends on the housing seals and the relubrication routine rather than bearing-mounted contact seals." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." }, { "q": "How is YAT-205-014 lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." } ], "cross_ref": [ { "equiv_sku": "YAT", "equiv_brand": "ISO 15", "level": "full", "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAT-205-014", "YAT 205-014" ], "locale_variants": {} }, { "sku": "YAT-205-015", "brand": "SKF", "manufacturer_designation": "YAT 205-015", "series": "YAR2-series", "type": "insert", "d_mm": 23.8125, "D_mm": 52, "B_mm": 27.2, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 14, "static_load_kN": 7.8, "fatigue_load_limit_kN": 0.335, "limiting_speed_rpm": 7000, "max_rpm": 7000, "weight_g": 170, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAT 205-015 is a grub-screw insert bearing with the inner ring extended on one side, 23.8125x52x27.2 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAT is SKF's grub-screw insert design — a single extended inner-ring side housing the two 120 deg set screws. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -015 = 23.813 mm, which is why this row sits beside, not on, the metric bore size. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units. Envelope 23.8125x52x27.2 mm (0.938x2.047x1.071 in), outer ring 15 mm wide, C 14 kN, C0 7.8 kN, Pu 0.335 kN. The catalogue publishes a single speed ceiling, the limiting speed: 7,000 r/min; mass 170 g. Outer-vs-overall width: the outer ring is 15 mm wide inside the 27.2 mm total, so the extended inner ring accounts for 0.449 of the overall width (12.2 mm of axial projection on the locking side). Grease-life arithmetic is dominated by speed: at dn approx 2.65x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Speed ceiling of 7,000 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Spherical-seat note in numbers: the 52 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 37.906 = 119.085 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Fatigue-limit check: Pu 0.335 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YAT 205-015 — most belt-driven mounted-unit loads sit comfortably under 2.393 % of C. Single-extension fitting note: with the inner ring extended only on the locking side, orient the open (non-extended) face toward the shaft step or housing shoulder as the drawing shows — reversed, the set screws end up unsupported by the abutment and the shortened side offers no seal land at all. Set-screw geometry on this size: the two 120 deg screws bear on the 23.8125 mm shaft inside the 27.2 mm total width while the outer ring is only 15 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "ventilation and extraction fans", "garden and groundcare equipment", "small packaging and labelling machines" ], "failure_modes": [ "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "Do not specify the 23.8125 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a one-side YAT insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 19.5 mm s1 dimension is the screw seating geometry inside the 12.2 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Catalogue ratings belong to YAT 205-015 as the grub one open execution; other order numbers of the YAT 205-015 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAT-205-015?", "a": "The catalogue envelope is 23.8125x52x27.2 mm with a spherical outside surface; mass 170 g. Ratings C 14/7.8 kN, Pu 0.335 kN, limiting speed 7,000 r/min." }, { "q": "What does the designation YAT 205-015 mean?", "a": "YAT is SKF's grub-screw insert design — a single extended inner-ring side housing the two 120 deg set screws. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -015 = 23.813 mm, which is why this row sits beside, not on, the metric bore size. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAT", "equiv_brand": "ISO 15", "level": "full", "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAT-205-015", "YAT 205-015" ], "locale_variants": {} }, { "sku": "YAR-205-015-2RF-VE495", "brand": "SKF", "manufacturer_designation": "YAR 205-015-2RF/VE495", "series": "YAR2-series", "type": "insert", "d_mm": 23.8125, "D_mm": 52, "B_mm": 34.1, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 14, "static_load_kN": 7.8, "fatigue_load_limit_kN": 0.335, "limiting_speed_rpm": 4300, "max_rpm": 4300, "weight_g": 210, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 205-015-2RF/VE495 is a SKF insert bearing (Y-bearing) for a 23.8125 mm (0.938 in) shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 52 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -015 decodes as 0\" +15/16, i.e. 23.813 mm; the metric coded size YAR 205 shares the same envelope but its bore is the metric value, not this one. the VE495 suffix packages zinc-coated rings with stainless-reinforced food-grade seals/flingers and food-grade lubricant — the wash-down-resistant counterpart of the standard -2RF bearing. Envelope 23.8125x52x34.1 mm (0.938x2.047x1.343 in), outer ring 15 mm wide, C 14 kN, C0 7.8 kN, Pu 0.335 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,300 r/min; mass 210 g. Grease-life arithmetic is dominated by speed: at dn approx 1.63x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Width accounting on this execution: 34.1 mm overall and 15 mm outer-ring width leave the housing designer 19.1 mm of inner-ring projection to accommodate the locking arrangement. Outer-vs-overall width: the outer ring is 15 mm wide inside the 34.1 mm total, so the extended inner ring accounts for 0.56 of the overall width (9.55 mm of axial projection per side). Spherical-seat note in numbers: the 52 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 37.906 = 119.085 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Speed ceiling of 4,300 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Zinc-coated food-range note: the VE495 plating is a functional surface, not cosmetic; clean the bore and shaft WITHOUT steel brushes or aggressive descalers, mount dry or with the approved food-grade mounting paste, and touch up damaged plating spots before commissioning the wash-down area. Set-screw geometry on this size: the two 120 deg screws bear on the 23.8125 mm shaft inside the 34.1 mm total width while the outer ring is only 15 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "ventilation and extraction fans", "small packaging and labelling machines", "garden and groundcare equipment" ], "failure_modes": [ "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 23.8125 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 19.8 mm s1 dimension is the screw seating geometry inside the 19.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Ordering discipline for the 23.8125 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-205-015-2RF-VE495?", "a": "Boundary dimensions: bore 23.8125 mm, sphered OD 52 mm, overall width 34.1 mm; weight 210 g. Loads: dynamic 14 kN, static 7.8 kN, fatigue 0.335 kN; the only published speed is the 4,300 r/min limiting value." }, { "q": "What does the designation YAR 205-015-2RF/VE495 mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -015 decodes as 0\" +15/16, i.e. 23.813 mm; the metric coded size YAR 205 shares the same envelope but its bore is the metric value, not this one. the VE495 suffix packages zinc-coated rings with stainless-reinforced food-grade seals/flingers and food-grade lubricant — the wash-down-resistant counterpart of the standard -2RF bearing." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." } ], "cross_ref": [ { "equiv_sku": "YAR-205-015-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 23.8125x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-015-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-205-015-2RF-VE495", "YAR 205-015-2RF/VE495" ], "locale_variants": {} }, { "sku": "YAR-205-015-2F", "brand": "SKF", "manufacturer_designation": "YAR 205-015-2F", "series": "YAR2-series", "type": "insert", "d_mm": 23.8125, "D_mm": 52, "B_mm": 34.1, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 14, "static_load_kN": 7.8, "fatigue_load_limit_kN": 0.335, "limiting_speed_rpm": 7000, "max_rpm": 7000, "weight_g": 200, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 205-015-2F is a SKF insert bearing (Y-bearing) for a 23.8125 mm (0.938 in) shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 52 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -015 decodes as 0\" +15/16, i.e. 23.813 mm; the metric coded size YAR 205 shares the same envelope but its bore is the metric value, not this one. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 23.8125x52x34.1 mm (0.938x2.047x1.343 in), outer ring 15 mm wide, C 14 kN, C0 7.8 kN, Pu 0.335 kN. The catalogue publishes a single speed ceiling, the limiting speed: 7,000 r/min; mass 200 g. Load balance for documentation: C0 7.8 kN against C 14 kN gives a 0.557 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Envelope arithmetic: the radial section from 23.8125 mm bore to 52 mm OD is 14.094 mm; dividing C 14 kN by that section gives 0.993 kN per section millimetre, and the 34.1 mm overall width is 2.42x the section. Grease-life arithmetic is dominated by speed: at dn approx 2.65x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Pitch-diameter arithmetic: dm = (23.8125+52)/2 = 37.906 mm; at the 7,000 r/min limiting speed the ball set runs at dn approx 2.65x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Imperial procurement cross-check: 0.938 in bore, 2.047 in OD, 1.343 in overall width; the 200 g mass converts to 0.200 kg (7.1 oz) for the bill of materials. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Set-screw geometry on this size: the two 120 deg screws bear on the 23.8125 mm shaft inside the 34.1 mm total width while the outer ring is only 15 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "ventilation and extraction fans", "small packaging and labelling machines", "garden and groundcare equipment" ], "failure_modes": [ "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "relubricated with incompatible grease that hardens the factory fill and drags the seals" ], "pitfalls": [ "The 19.8 mm s1 dimension is the screw seating geometry inside the 19.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 23.8125 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 14/7.8 kN figures belong specifically to YAR 205-015-2F; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-205-015-2F?", "a": "Boundary dimensions: bore 23.8125 mm, sphered OD 52 mm, overall width 34.1 mm; weight 200 g. Loads: dynamic 14 kN, static 7.8 kN, fatigue 0.335 kN; the only published speed is the 7,000 r/min limiting value." }, { "q": "What does the designation YAR 205-015-2F mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -015 decodes as 0\" +15/16, i.e. 23.813 mm; the metric coded size YAR 205 shares the same envelope but its bore is the metric value, not this one. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." } ], "cross_ref": [ { "equiv_sku": "YAR-205-015-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 23.8125x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-015-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-205-015-2F", "YAR 205-015-2F" ], "locale_variants": {} }, { "sku": "YAT-205-100", "brand": "SKF", "manufacturer_designation": "YAT 205-100", "series": "YAR2-series", "type": "insert", "d_mm": 25.4, "D_mm": 52, "B_mm": 27.2, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 14, "static_load_kN": 7.8, "fatigue_load_limit_kN": 0.335, "limiting_speed_rpm": 7000, "max_rpm": 7000, "weight_g": 160, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YAT 205-100 is SKF's 25.4 mm-bore grub-screw insert bearing with the inner ring extended on one side in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 25.4x52x27.2 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAT prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring is extended on one side only. the three-digit -100 tail codes the bore in inches for inch-shaft bearings: 1 whole inch = 25.4 mm (first digit whole inches, next two sixteenths of an inch). this suffix-free execution is listed without the sealed external design: the 27.2 mm width is the one-side-extended inner ring alone, so protection depends on the housing seals and the relubrication routine rather than bearing-mounted contact seals. Envelope 25.4x52x27.2 mm (1x2.047x1.071 in), outer ring 15 mm wide, C 14 kN, C0 7.8 kN, Pu 0.335 kN. The catalogue publishes a single speed ceiling, the limiting speed: 7,000 r/min; mass 160 g. Pitch-diameter arithmetic: dm = (25.4+52)/2 = 38.7 mm; at the 7,000 r/min limiting speed the ball set runs at dn approx 2.71x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Spherical-seat note in numbers: the 52 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 38.7 = 121.58 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Rating split for the maintenance file: dynamic 14 kN (L10), static 7.8 kN (s0 shock check), fatigue 0.335 kN (adjusted life) — three separate uses for YAT 205-100, none interchangeable with another. Fillet discipline: the printed r_min 0.6 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 25.4x52 mm insert on its chamfer tilts the whole spherical seat. Capacity density: 14 kN from 0.160 kg of bearing steel is about 87.5 kN per kilogram, and per width millimetre the 27.2 mm unit carries 0.515 kN of dynamic capacity. Single-extension fitting note: with the inner ring extended only on the locking side, orient the open (non-extended) face toward the shaft step or housing shoulder as the drawing shows — reversed, the set screws end up unsupported by the abutment and the shortened side offers no seal land at all. Set-screw geometry on this size: the two 120 deg screws bear on the 25.4 mm shaft inside the 27.2 mm total width while the outer ring is only 15 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "trough conveyor idler drives", "small packaging and labelling machines", "ventilation and extraction fans" ], "failure_modes": [ "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "Do not specify the 25.4 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a one-side YAT insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 19.5 mm s1 dimension is the screw seating geometry inside the 12.2 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Catalogue ratings belong to YAT 205-100 as the grub one open execution; other order numbers of the YAT 205-100 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAT-205-100?", "a": "YAT 205-100 measures 25.4 mm bore x 52 mm OD x 27.2 mm overall width (outer ring 15 mm wide), 1 x 2.047 x 1.071 in; mass about 160 g. SKF 17000 ratings: C 14 kN, C0 7.8 kN, Pu 0.335 kN, limiting speed 7,000 r/min." }, { "q": "What does the designation YAT 205-100 mean?", "a": "the YAT prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring is extended on one side only. the three-digit -100 tail codes the bore in inches for inch-shaft bearings: 1 whole inch = 25.4 mm (first digit whole inches, next two sixteenths of an inch). this suffix-free execution is listed without the sealed external design: the 27.2 mm width is the one-side-extended inner ring alone, so protection depends on the housing seals and the relubrication routine rather than bearing-mounted contact seals." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." }, { "q": "How is YAT-205-100 lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." } ], "cross_ref": [ { "equiv_sku": "YAT-205", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x27.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAT 205 is the grub-screw locking, one-side-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAT-205-100", "YAT 205-100" ], "locale_variants": {} }, { "sku": "YAR-205-100-2RF-HV", "brand": "SKF", "manufacturer_designation": "YAR 205-100-2RF/HV", "series": "YAR2-series", "type": "insert", "d_mm": 25.4, "D_mm": 52, "B_mm": 34.1, "material": "SS440C", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 11.9, "static_load_kN": 7.8, "fatigue_load_limit_kN": 0.335, "limiting_speed_rpm": 4300, "max_rpm": 4300, "weight_g": 190, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAR 205-100-2RF/HV is a grub-screw insert bearing with the inner ring extended on both sides, 25.4x52x34.1 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -100 = 25.4 mm, which is why this row sits beside, not on, the metric bore size. HV is the corrosion-resistant food-range variant of the -2RF sealed design — stainless parts plus food-compatible rubber and lubricant, which also explains its lower published C and limiting speed. Envelope 25.4x52x34.1 mm (1x2.047x1.343 in), outer ring 15 mm wide, C 11.9 kN, C0 7.8 kN, Pu 0.335 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,300 r/min; mass 190 g. Outer-vs-overall width: the outer ring is 15 mm wide inside the 34.1 mm total, so the extended inner ring accounts for 0.56 of the overall width (9.55 mm of axial projection per side). Mass-to-load ratio for YAR-205-100-2RF-HV: 15.966 g of catalogue mass per rated kN of C, and 7.48 g per millimetre of bore — useful when comparing executions of the same 25.4x52 mm envelope on the drawing. Envelope arithmetic: the radial section from 25.4 mm bore to 52 mm OD is 13.3 mm; dividing C 11.9 kN by that section gives 0.895 kN per section millimetre, and the 34.1 mm overall width is 2.564x the section. Static-first planning: the 0.229 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 25.4 mm shaft, not the 11.9 kN L10 value. Selection figures for YAR 205-100-2RF/HV: C0/C is 0.655, Pu 0.335 kN is 2.815 % of the 11.9 kN dynamic rating, and the 190 g catalogue mass works out to roughly 7.48 g per millimetre of the 25.4 mm bore. Stainless food-range note: HV parts trade some capacity for corrosion resistance and food-compatible lubrication, and the printed limiting speed is set for that fill; do not top up with ordinary mineral grease in service — mixing greases can harden the food-grade fill and seize the seals. Service tip for YAR-205-100-2RF-HV: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 13.3 mm radial section.", "applications": [ "small packaging and labelling machines", "garden and groundcare equipment", "head- and tail-shaft pillow blocks in unit handling" ], "failure_modes": [ "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "relubricated with incompatible grease that hardens the factory fill and drags the seals" ], "pitfalls": [ "The 19.8 mm s1 dimension is the screw seating geometry inside the 19.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 25.4 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 11.9/7.8 kN figures belong specifically to YAR 205-100-2RF/HV; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-205-100-2RF-HV?", "a": "The catalogue envelope is 25.4x52x34.1 mm with a spherical outside surface; mass 190 g. Ratings C 11.9/7.8 kN, Pu 0.335 kN, limiting speed 4,300 r/min." }, { "q": "What does the designation YAR 205-100-2RF/HV mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -100 = 25.4 mm, which is why this row sits beside, not on, the metric bore size. HV is the corrosion-resistant food-range variant of the -2RF sealed design — stainless parts plus food-compatible rubber and lubricant, which also explains its lower published C and limiting speed." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAR-205-2RF-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-2RF/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-2RFGR-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-2RFGR/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YARAG-205", "equiv_brand": "SKF", "level": "partial", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (11.9/7.8 kN vs 14/7.8 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-2RF", "equiv_brand": "SKF", "level": "partial", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (11.9/7.8 kN vs 14/7.8 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (11.9/7.8 kN vs 14/7.8 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (11.9/7.8 kN vs 14/7.8 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-100-2RFGR-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-100-2RFGR/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YARAG-205-100", "equiv_brand": "SKF", "level": "partial", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (11.9/7.8 kN vs 14/7.8 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-205-100-2RF", "equiv_brand": "SKF", "level": "partial", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (11.9/7.8 kN vs 14/7.8 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-205-100-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (11.9/7.8 kN vs 14/7.8 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-205-100-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (11.9/7.8 kN vs 14/7.8 kN) — envelope match, not a load-rating equivalent." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-205-100-2RF-HV", "YAR 205-100-2RF/HV" ], "locale_variants": {} }, { "sku": "YAR-205-100-2RFGR-HV", "brand": "SKF", "manufacturer_designation": "YAR 205-100-2RFGR/HV", "series": "YAR2-series", "type": "insert", "d_mm": 25.4, "D_mm": 52, "B_mm": 34.1, "material": "SS440C", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 11.9, "static_load_kN": 7.8, "fatigue_load_limit_kN": 0.335, "limiting_speed_rpm": 4300, "max_rpm": 4300, "weight_g": 190, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YAR 205-100-2RFGR/HV is SKF's 25.4 mm-bore grub-screw insert bearing with the inner ring extended on both sides in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 25.4x52x34.1 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -100 tail codes the bore in inches for inch-shaft bearings: 1 whole inch = 25.4 mm (first digit whole inches, next two sixteenths of an inch). /HV identifies the stainless-steel, food-industry execution: stainless bearing components, food-compatible rubber in the seal/flinger set and food-grade grease fill — the catalogue ratings are correspondingly below the standard steel version, and the GR marking adds the lubrication groove in the sphered outside surface on the locking side. Envelope 25.4x52x34.1 mm (1x2.047x1.343 in), outer ring 15 mm wide, C 11.9 kN, C0 7.8 kN, Pu 0.335 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,300 r/min; mass 190 g. Mass-to-load ratio for YAR-205-100-2RFGR-HV: 15.966 g of catalogue mass per rated kN of C, and 7.48 g per millimetre of bore — useful when comparing executions of the same 25.4x52 mm envelope on the drawing. Grease-life arithmetic is dominated by speed: at dn approx 1.66x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. The s1 19.8 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Selection figures for YAR 205-100-2RFGR/HV: C0/C is 0.655, Pu 0.335 kN is 2.815 % of the 11.9 kN dynamic rating, and the 190 g catalogue mass works out to roughly 7.48 g per millimetre of the 25.4 mm bore. Imperial procurement cross-check: 1 in bore, 2.047 in OD, 1.343 in overall width; the 190 g mass converts to 0.190 kg (6.7 oz) for the bill of materials. Stainless food-range note: HV parts trade some capacity for corrosion resistance and food-compatible lubrication, and the printed limiting speed is set for that fill; do not top up with ordinary mineral grease in service — mixing greases can harden the food-grade fill and seize the seals. Service tip for YAR-205-100-2RFGR-HV: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 13.3 mm radial section.", "applications": [ "head- and tail-shaft pillow blocks in unit handling", "garden and groundcare equipment", "trough conveyor idler drives" ], "failure_modes": [ "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "Do not specify the 25.4 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 19.8 mm s1 dimension is the screw seating geometry inside the 19.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Catalogue ratings belong to YAR 205-100-2RFGR/HV as the grub two hv execution; other order numbers of the YAR 205-100 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-205-100-2RFGR-HV?", "a": "YAR 205-100-2RFGR/HV measures 25.4 mm bore x 52 mm OD x 34.1 mm overall width (outer ring 15 mm wide), 1 x 2.047 x 1.343 in; mass about 190 g. SKF 17000 ratings: C 11.9 kN, C0 7.8 kN, Pu 0.335 kN, limiting speed 4,300 r/min." }, { "q": "What does the designation YAR 205-100-2RFGR/HV mean?", "a": "the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -100 tail codes the bore in inches for inch-shaft bearings: 1 whole inch = 25.4 mm (first digit whole inches, next two sixteenths of an inch). /HV identifies the stainless-steel, food-industry execution: stainless bearing components, food-compatible rubber in the seal/flinger set and food-grade grease fill — the catalogue ratings are correspondingly below the standard steel version, and the GR marking adds the lubrication groove in the sphered outside surface on the locking side." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAR-205-2RF-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-2RF/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-2RFGR-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-2RFGR/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YARAG-205", "equiv_brand": "SKF", "level": "partial", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (11.9/7.8 kN vs 14/7.8 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-2RF", "equiv_brand": "SKF", "level": "partial", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (11.9/7.8 kN vs 14/7.8 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (11.9/7.8 kN vs 14/7.8 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (11.9/7.8 kN vs 14/7.8 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-100-2RF-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-100-2RF/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YARAG-205-100", "equiv_brand": "SKF", "level": "partial", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (11.9/7.8 kN vs 14/7.8 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-205-100-2RF", "equiv_brand": "SKF", "level": "partial", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (11.9/7.8 kN vs 14/7.8 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-205-100-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (11.9/7.8 kN vs 14/7.8 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-205-100-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (11.9/7.8 kN vs 14/7.8 kN) — envelope match, not a load-rating equivalent." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-205-100-2RFGR-HV", "YAR 205-100-2RFGR/HV" ], "locale_variants": {} }, { "sku": "YARAG-205-100", "brand": "SKF", "manufacturer_designation": "YARAG 205-100", "series": "YAR2-series", "type": "insert", "d_mm": 25.4, "D_mm": 52, "B_mm": 34.1, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 14, "static_load_kN": 7.8, "fatigue_load_limit_kN": 0.335, "limiting_speed_rpm": 1500, "max_rpm": 1500, "weight_g": 180, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YARAG 205-100 is SKF's 25.4 mm-bore grub-screw insert bearing with the inner ring extended on both sides in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 25.4x52x34.1 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -100 tail codes the bore in inches for inch-shaft bearings: 1 whole inch = 25.4 mm (first digit whole inches, next two sixteenths of an inch). AG marks the agricultural-machinery application execution, built on the sealed both-sides-extended geometry and tuned for the low-speed, shock-laden duty of harvesters, balers and spreaders — note the catalogue prints a much reduced limiting speed for this variant. Envelope 25.4x52x34.1 mm (1x2.047x1.343 in), outer ring 15 mm wide, C 14 kN, C0 7.8 kN, Pu 0.335 kN. The catalogue publishes a single speed ceiling, the limiting speed: 1,500 r/min; mass 180 g. Rating split for the maintenance file: dynamic 14 kN (L10), static 7.8 kN (s0 shock check), fatigue 0.335 kN (adjusted life) — three separate uses for YARAG 205-100, none interchangeable with another. Load balance for documentation: C0 7.8 kN against C 14 kN gives a 0.557 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Bore-to-OD planning: OD 52 over bore 25.4 is a 2.047x step, while bore/overall-width gives 0.745; the spherical seat in the matching Y-housing must be specified to the 52 mm OD, not to a cylindrical housing bore. Imperial procurement cross-check: 1 in bore, 2.047 in OD, 1.343 in overall width; the 180 g mass converts to 0.180 kg (6.3 oz) for the bill of materials. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 33.7 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the inner flinger. Service tip for YARAG-205-100: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 13.3 mm radial section.", "applications": [ "head- and tail-shaft pillow blocks in unit handling", "garden and groundcare equipment", "trough conveyor idler drives" ], "failure_modes": [ "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "Do not specify the 25.4 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 19.8 mm s1 dimension is the screw seating geometry inside the 19.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Catalogue ratings belong to YARAG 205-100 as the grub two ag execution; other order numbers of the YARAG 205-100 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YARAG-205-100?", "a": "YARAG 205-100 measures 25.4 mm bore x 52 mm OD x 34.1 mm overall width (outer ring 15 mm wide), 1 x 2.047 x 1.343 in; mass about 180 g. SKF 17000 ratings: C 14 kN, C0 7.8 kN, Pu 0.335 kN, limiting speed 1,500 r/min." }, { "q": "What does the designation YARAG 205-100 mean?", "a": "the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -100 tail codes the bore in inches for inch-shaft bearings: 1 whole inch = 25.4 mm (first digit whole inches, next two sixteenths of an inch). AG marks the agricultural-machinery application execution, built on the sealed both-sides-extended geometry and tuned for the low-speed, shock-laden duty of harvesters, balers and spreaders — note the catalogue prints a much reduced limiting speed for this variant." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAR-205-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (14/7.8 kN vs 11.9/7.8 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (14/7.8 kN vs 11.9/7.8 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YARAG-205", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 205 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-100-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (14/7.8 kN vs 11.9/7.8 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-205-100-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (14/7.8 kN vs 11.9/7.8 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-205-100-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-100-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-205-100-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-100-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-205-100-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-100-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YARAG-205-100", "YARAG 205-100" ], "locale_variants": {} }, { "sku": "YAR-205-100-2RF", "brand": "SKF", "manufacturer_designation": "YAR 205-100-2RF", "series": "YAR2-series", "type": "insert", "d_mm": 25.4, "D_mm": 52, "B_mm": 34.1, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 14, "static_load_kN": 7.8, "fatigue_load_limit_kN": 0.335, "limiting_speed_rpm": 4300, "max_rpm": 4300, "weight_g": 190, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 205-100-2RF is a SKF insert bearing (Y-bearing) for a 25.4 mm (1 in) shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 52 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -100 decodes as 1\", i.e. 25.4 mm; the metric coded size YAR 205 shares the same envelope but its bore is the metric value, not this one. -2RF means an NBR contact lip plus a rubber-coated flinger at both sides, the catalogue step above -2F for wet, abrasive or washed-down environments. Envelope 25.4x52x34.1 mm (1x2.047x1.343 in), outer ring 15 mm wide, C 14 kN, C0 7.8 kN, Pu 0.335 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,300 r/min; mass 190 g. The s1 19.8 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Outer-vs-overall width: the outer ring is 15 mm wide inside the 34.1 mm total, so the extended inner ring accounts for 0.56 of the overall width (9.55 mm of axial projection per side). Imperial procurement cross-check: 1 in bore, 2.047 in OD, 1.343 in overall width; the 190 g mass converts to 0.190 kg (6.7 oz) for the bill of materials. Pitch-diameter arithmetic: dm = (25.4+52)/2 = 38.7 mm; at the 4,300 r/min limiting speed the ball set runs at dn approx 1.66x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Grease-life arithmetic is dominated by speed: at dn approx 1.66x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Rubberized-flinger note: the -2RF coated throwers are vulcanized assemblies — never lever or hammer against the flinger when mounting, and press only on the inner ring when the bearing is fitted loose before the housing cap closes, or the flinger lip folds inward and grinds on the inner ring. Service tip for YAR-205-100-2RF: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 13.3 mm radial section.", "applications": [ "ventilation and extraction fans", "garden and groundcare equipment", "trough conveyor idler drives" ], "failure_modes": [ "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "The 19.8 mm s1 dimension is the screw seating geometry inside the 19.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 25.4 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 14/7.8 kN figures belong specifically to YAR 205-100-2RF; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-205-100-2RF?", "a": "Boundary dimensions: bore 25.4 mm, sphered OD 52 mm, overall width 34.1 mm; weight 190 g. Loads: dynamic 14 kN, static 7.8 kN, fatigue 0.335 kN; the only published speed is the 4,300 r/min limiting value." }, { "q": "What does the designation YAR 205-100-2RF mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -100 decodes as 1\", i.e. 25.4 mm; the metric coded size YAR 205 shares the same envelope but its bore is the metric value, not this one. -2RF means an NBR contact lip plus a rubber-coated flinger at both sides, the catalogue step above -2F for wet, abrasive or washed-down environments." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAR-205-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (14/7.8 kN vs 11.9/7.8 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (14/7.8 kN vs 11.9/7.8 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YARAG-205", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 205 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-100-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (14/7.8 kN vs 11.9/7.8 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-205-100-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (14/7.8 kN vs 11.9/7.8 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YARAG-205-100", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 205-100 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-205-100-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-100-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-205-100-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-100-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-205-100-2RF", "YAR 205-100-2RF" ], "locale_variants": {} }, { "sku": "YAR-205-100-2RF-VE495", "brand": "SKF", "manufacturer_designation": "YAR 205-100-2RF/VE495", "series": "YAR2-series", "type": "insert", "d_mm": 25.4, "D_mm": 52, "B_mm": 34.1, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 14, "static_load_kN": 7.8, "fatigue_load_limit_kN": 0.335, "limiting_speed_rpm": 4300, "max_rpm": 4300, "weight_g": 190, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YAR 205-100-2RF/VE495 is SKF's 25.4 mm-bore grub-screw insert bearing with the inner ring extended on both sides in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 25.4x52x34.1 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -100 tail codes the bore in inches for inch-shaft bearings: 1 whole inch = 25.4 mm (first digit whole inches, next two sixteenths of an inch). /VE495 is the zinc-plated food-industry execution: zinc-coated inner and outer rings, seals and flingers with stainless-steel inserts in food-compatible rubber, and food-grade grease fill. Envelope 25.4x52x34.1 mm (1x2.047x1.343 in), outer ring 15 mm wide, C 14 kN, C0 7.8 kN, Pu 0.335 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,300 r/min; mass 190 g. Bore-to-OD planning: OD 52 over bore 25.4 is a 2.047x step, while bore/overall-width gives 0.745; the spherical seat in the matching Y-housing must be specified to the 52 mm OD, not to a cylindrical housing bore. Imperial procurement cross-check: 1 in bore, 2.047 in OD, 1.343 in overall width; the 190 g mass converts to 0.190 kg (6.7 oz) for the bill of materials. Rating split for the maintenance file: dynamic 14 kN (L10), static 7.8 kN (s0 shock check), fatigue 0.335 kN (adjusted life) — three separate uses for YAR 205-100-2RF/VE495, none interchangeable with another. Pitch-diameter arithmetic: dm = (25.4+52)/2 = 38.7 mm; at the 4,300 r/min limiting speed the ball set runs at dn approx 1.66x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Envelope arithmetic: the radial section from 25.4 mm bore to 52 mm OD is 13.3 mm; dividing C 14 kN by that section gives 1.053 kN per section millimetre, and the 34.1 mm overall width is 2.564x the section. Zinc-coated food-range note: the VE495 plating is a functional surface, not cosmetic; clean the bore and shaft WITHOUT steel brushes or aggressive descalers, mount dry or with the approved food-grade mounting paste, and touch up damaged plating spots before commissioning the wash-down area. Set-screw geometry on this size: the two 120 deg screws bear on the 25.4 mm shaft inside the 34.1 mm total width while the outer ring is only 15 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "ventilation and extraction fans", "head- and tail-shaft pillow blocks in unit handling", "trough conveyor idler drives" ], "failure_modes": [ "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "Do not specify the 25.4 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 19.8 mm s1 dimension is the screw seating geometry inside the 19.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Catalogue ratings belong to YAR 205-100-2RF/VE495 as the grub two ve495 execution; other order numbers of the YAR 205-100 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-205-100-2RF-VE495?", "a": "YAR 205-100-2RF/VE495 measures 25.4 mm bore x 52 mm OD x 34.1 mm overall width (outer ring 15 mm wide), 1 x 2.047 x 1.343 in; mass about 190 g. SKF 17000 ratings: C 14 kN, C0 7.8 kN, Pu 0.335 kN, limiting speed 4,300 r/min." }, { "q": "What does the designation YAR 205-100-2RF/VE495 mean?", "a": "the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -100 tail codes the bore in inches for inch-shaft bearings: 1 whole inch = 25.4 mm (first digit whole inches, next two sixteenths of an inch). /VE495 is the zinc-plated food-industry execution: zinc-coated inner and outer rings, seals and flingers with stainless-steel inserts in food-compatible rubber, and food-grade grease fill." }, { "q": "How is YAR-205-100-2RF-VE495 lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." }, { "q": "How do the set screws lock the 25.4 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." } ], "cross_ref": [ { "equiv_sku": "YAR-205-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (14/7.8 kN vs 11.9/7.8 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (14/7.8 kN vs 11.9/7.8 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YARAG-205", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 205 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-100-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (14/7.8 kN vs 11.9/7.8 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-205-100-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (14/7.8 kN vs 11.9/7.8 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YARAG-205-100", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 205-100 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-205-100-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-100-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-205-100-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-100-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-205-100-2RF-VE495", "YAR 205-100-2RF/VE495" ], "locale_variants": {} }, { "sku": "YAR-205-100-2F", "brand": "SKF", "manufacturer_designation": "YAR 205-100-2F", "series": "YAR2-series", "type": "insert", "d_mm": 25.4, "D_mm": 52, "B_mm": 34.1, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 14, "static_load_kN": 7.8, "fatigue_load_limit_kN": 0.335, "limiting_speed_rpm": 7000, "max_rpm": 7000, "weight_g": 190, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAR 205-100-2F is a grub-screw insert bearing with the inner ring extended on both sides, 25.4x52x34.1 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -100 = 25.4 mm, which is why this row sits beside, not on, the metric bore size. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution. Envelope 25.4x52x34.1 mm (1x2.047x1.343 in), outer ring 15 mm wide, C 14 kN, C0 7.8 kN, Pu 0.335 kN. The catalogue publishes a single speed ceiling, the limiting speed: 7,000 r/min; mass 190 g. Width accounting on this execution: 34.1 mm overall and 15 mm outer-ring width leave the housing designer 19.1 mm of inner-ring projection to accommodate the locking arrangement. Outer-vs-overall width: the outer ring is 15 mm wide inside the 34.1 mm total, so the extended inner ring accounts for 0.56 of the overall width (9.55 mm of axial projection per side). Inner-geometry cross-reference: the catalogue shoulder diameters (d1 33.7 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the plain flinger. The s1 19.8 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Selection figures for YAR 205-100-2F: C0/C is 0.557, Pu 0.335 kN is 2.393 % of the 14 kN dynamic rating, and the 190 g catalogue mass works out to roughly 7.48 g per millimetre of the 25.4 mm bore. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Set-screw geometry on this size: the two 120 deg screws bear on the 25.4 mm shaft inside the 34.1 mm total width while the outer ring is only 15 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "garden and groundcare equipment", "head- and tail-shaft pillow blocks in unit handling", "trough conveyor idler drives" ], "failure_modes": [ "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "The 19.8 mm s1 dimension is the screw seating geometry inside the 19.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 25.4 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 14/7.8 kN figures belong specifically to YAR 205-100-2F; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-205-100-2F?", "a": "The catalogue envelope is 25.4x52x34.1 mm with a spherical outside surface; mass 190 g. Ratings C 14/7.8 kN, Pu 0.335 kN, limiting speed 7,000 r/min." }, { "q": "What does the designation YAR 205-100-2F mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -100 = 25.4 mm, which is why this row sits beside, not on, the metric bore size. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAR-205-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (14/7.8 kN vs 11.9/7.8 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (14/7.8 kN vs 11.9/7.8 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YARAG-205", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 205 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-205-100-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (14/7.8 kN vs 11.9/7.8 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-205-100-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (14/7.8 kN vs 11.9/7.8 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YARAG-205-100", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 205-100 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-205-100-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-100-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-205-100-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 205-100-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-205-100-2F", "YAR 205-100-2F" ], "locale_variants": {} }, { "sku": "YAR-206-101-2F", "brand": "SKF", "manufacturer_designation": "YAR 206-101-2F", "series": "YAR2-series", "type": "insert", "d_mm": 26.987499999999997, "D_mm": 62, "B_mm": 38.1, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 19.5, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 6300, "max_rpm": 6300, "weight_g": 350, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YAR 206-101-2F is SKF's 26.987499999999997 mm-bore grub-screw insert bearing with the inner ring extended on both sides in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 26.987499999999997x62x38.1 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -101 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 1/16 in = 26.987 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 26.987499999999997x62x38.1 mm (1.063x2.441x1.5 in), outer ring 18 mm wide, C 19.5 kN, C0 11.2 kN, Pu 0.475 kN. The catalogue publishes a single speed ceiling, the limiting speed: 6,300 r/min; mass 350 g. Fillet discipline: the printed r_min 0.6 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 26.987499999999997x62 mm insert on its chamfer tilts the whole spherical seat. Grease-life arithmetic is dominated by speed: at dn approx 2.80x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. The s1 22.2 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Mass-to-load ratio for YAR-206-101-2F: 17.949 g of catalogue mass per rated kN of C, and 12.969 g per millimetre of bore — useful when comparing executions of the same 26.987499999999997x62 mm envelope on the drawing. Capacity density: 19.5 kN from 0.350 kg of bearing steel is about 55.714 kN per kilogram, and per width millimetre the 38.1 mm unit carries 0.512 kN of dynamic capacity. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Service tip for YAR-206-101-2F: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 17.506 mm radial section.", "applications": [ "head- and tail-shaft pillow blocks in unit handling", "garden and groundcare equipment", "ventilation and extraction fans" ], "failure_modes": [ "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 22.2 mm s1 dimension is the screw seating geometry inside the 20.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 26.987499999999997 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Ordering discipline for the 26.987499999999997 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-206-101-2F?", "a": "YAR 206-101-2F measures 26.987499999999997 mm bore x 62 mm OD x 38.1 mm overall width (outer ring 18 mm wide), 1.063 x 2.441 x 1.5 in; mass about 350 g. SKF 17000 ratings: C 19.5 kN, C0 11.2 kN, Pu 0.475 kN, limiting speed 6,300 r/min." }, { "q": "What does the designation YAR 206-101-2F mean?", "a": "the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -101 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 1/16 in = 26.987 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAR", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-206-101-2F", "YAR 206-101-2F" ], "locale_variants": {} }, { "sku": "YARAG-206-102", "brand": "SKF", "manufacturer_designation": "YARAG 206-102", "series": "YAR2-series", "type": "insert", "d_mm": 28.575, "D_mm": 62, "B_mm": 38.1, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 19.5, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 1200, "max_rpm": 1200, "weight_g": 320, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YARAG 206-102 is SKF's 28.575 mm-bore grub-screw insert bearing with the inner ring extended on both sides in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 28.575x62x38.1 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -102 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 2/16 in = 28.575 mm (first digit whole inches, next two sixteenths of an inch). AG marks the agricultural-machinery application execution, built on the sealed both-sides-extended geometry and tuned for the low-speed, shock-laden duty of harvesters, balers and spreaders — note the catalogue prints a much reduced limiting speed for this variant. Envelope 28.575x62x38.1 mm (1.125x2.441x1.5 in), outer ring 18 mm wide, C 19.5 kN, C0 11.2 kN, Pu 0.475 kN. The catalogue publishes a single speed ceiling, the limiting speed: 1,200 r/min; mass 320 g. Fatigue-limit check: Pu 0.475 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YARAG 206-102 — most belt-driven mounted-unit loads sit comfortably under 2.436 % of C. Capacity density: 19.5 kN from 0.320 kg of bearing steel is about 60.938 kN per kilogram, and per width millimetre the 38.1 mm unit carries 0.512 kN of dynamic capacity. Width accounting on this execution: 38.1 mm overall and 18 mm outer-ring width leave the housing designer 20.1 mm of inner-ring projection to accommodate the locking arrangement. The s1 22.2 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Speed ceiling of 1,200 r/min is the catalogue mechanical limit for THIS execution; the AG agricultural derate is deliberate, so real fan duty is planned well below it. Set-screw geometry on this size: the two 120 deg screws bear on the 28.575 mm shaft inside the 38.1 mm total width while the outer ring is only 18 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "garden and groundcare equipment", "trough conveyor idler drives", "head- and tail-shaft pillow blocks in unit handling" ], "failure_modes": [ "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "Do not specify the 28.575 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 22.2 mm s1 dimension is the screw seating geometry inside the 20.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Catalogue ratings belong to YARAG 206-102 as the grub two ag execution; other order numbers of the YARAG 206-102 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YARAG-206-102?", "a": "YARAG 206-102 measures 28.575 mm bore x 62 mm OD x 38.1 mm overall width (outer ring 18 mm wide), 1.125 x 2.441 x 1.5 in; mass about 320 g. SKF 17000 ratings: C 19.5 kN, C0 11.2 kN, Pu 0.475 kN, limiting speed 1,200 r/min." }, { "q": "What does the designation YARAG 206-102 mean?", "a": "the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -102 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 2/16 in = 28.575 mm (first digit whole inches, next two sixteenths of an inch). AG marks the agricultural-machinery application execution, built on the sealed both-sides-extended geometry and tuned for the low-speed, shock-laden duty of harvesters, balers and spreaders — note the catalogue prints a much reduced limiting speed for this variant." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." }, { "q": "How is YARAG-206-102 lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." } ], "cross_ref": [ { "equiv_sku": "YAR-206-102-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 28.575x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-102-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YARAG-206-102", "YARAG 206-102" ], "locale_variants": {} }, { "sku": "YAR-206-102-2F", "brand": "SKF", "manufacturer_designation": "YAR 206-102-2F", "series": "YAR2-series", "type": "insert", "d_mm": 28.575, "D_mm": 62, "B_mm": 38.1, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 19.5, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 6300, "max_rpm": 6300, "weight_g": 320, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAR 206-102-2F is a grub-screw insert bearing with the inner ring extended on both sides, 28.575x62x38.1 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -102 = 28.575 mm, which is why this row sits beside, not on, the metric bore size. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution. Envelope 28.575x62x38.1 mm (1.125x2.441x1.5 in), outer ring 18 mm wide, C 19.5 kN, C0 11.2 kN, Pu 0.475 kN. The catalogue publishes a single speed ceiling, the limiting speed: 6,300 r/min; mass 320 g. Speed ceiling of 6,300 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Static-first planning: the 0.294 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 28.575 mm shaft, not the 19.5 kN L10 value. Load balance for documentation: C0 11.2 kN against C 19.5 kN gives a 0.574 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. The s1 22.2 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. At the printed limiting speed of 6,300 r/min the mean diameter dm = 45.288 mm implies dn about 2.85x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Service tip for YAR-206-102-2F: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 16.712 mm radial section.", "applications": [ "head- and tail-shaft pillow blocks in unit handling", "small packaging and labelling machines", "ventilation and extraction fans" ], "failure_modes": [ "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "The 22.2 mm s1 dimension is the screw seating geometry inside the 20.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 28.575 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 19.5/11.2 kN figures belong specifically to YAR 206-102-2F; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-206-102-2F?", "a": "The catalogue envelope is 28.575x62x38.1 mm with a spherical outside surface; mass 320 g. Ratings C 19.5/11.2 kN, Pu 0.475 kN, limiting speed 6,300 r/min." }, { "q": "What does the designation YAR 206-102-2F mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -102 = 28.575 mm, which is why this row sits beside, not on, the metric bore size. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." } ], "cross_ref": [ { "equiv_sku": "YARAG-206-102", "equiv_brand": "SKF", "level": "full", "note": "Same 28.575x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 206-102 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-206-102-2F", "YAR 206-102-2F" ], "locale_variants": {} }, { "sku": "YAT-206-103", "brand": "SKF", "manufacturer_designation": "YAT 206-103", "series": "YAR2-series", "type": "insert", "d_mm": 30.162499999999998, "D_mm": 62, "B_mm": 30.2, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 19.5, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 6300, "max_rpm": 6300, "weight_g": 260, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAT 206-103 is a grub-screw insert bearing with the inner ring extended on one side, 30.162499999999998x62x30.2 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAT is SKF's grub-screw insert design — a single extended inner-ring side housing the two 120 deg set screws. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -103 = 30.162 mm, which is why this row sits beside, not on, the metric bore size. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units. Envelope 30.162499999999998x62x30.2 mm (1.188x2.441x1.189 in), outer ring 18 mm wide, C 19.5 kN, C0 11.2 kN, Pu 0.475 kN. The catalogue publishes a single speed ceiling, the limiting speed: 6,300 r/min; mass 260 g. Load balance for documentation: C0 11.2 kN against C 19.5 kN gives a 0.574 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. The s1 21 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Speed ceiling of 6,300 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Fillet discipline: the printed r_min 0.6 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 30.162499999999998x62 mm insert on its chamfer tilts the whole spherical seat. Mass-to-load ratio for YAT-206-103: 13.333 g of catalogue mass per rated kN of C, and 8.62 g per millimetre of bore — useful when comparing executions of the same 30.162499999999998x62 mm envelope on the drawing. Single-extension fitting note: with the inner ring extended only on the locking side, orient the open (non-extended) face toward the shaft step or housing shoulder as the drawing shows — reversed, the set screws end up unsupported by the abutment and the shortened side offers no seal land at all. Set-screw geometry on this size: the two 120 deg screws bear on the 30.162499999999998 mm shaft inside the 30.2 mm total width while the outer ring is only 18 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "trough conveyor idler drives", "ventilation and extraction fans", "garden and groundcare equipment" ], "failure_modes": [ "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "The 21 mm s1 dimension is the screw seating geometry inside the 12.2 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 30.162499999999998 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a one-side YAT insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 19.5/11.2 kN figures belong specifically to YAT 206-103; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAT-206-103?", "a": "The catalogue envelope is 30.162499999999998x62x30.2 mm with a spherical outside surface; mass 260 g. Ratings C 19.5/11.2 kN, Pu 0.475 kN, limiting speed 6,300 r/min." }, { "q": "What does the designation YAT 206-103 mean?", "a": "YAT is SKF's grub-screw insert design — a single extended inner-ring side housing the two 120 deg set screws. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -103 = 30.162 mm, which is why this row sits beside, not on, the metric bore size. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units." }, { "q": "How do the set screws lock the 30.162499999999998 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." } ], "cross_ref": [ { "equiv_sku": "YAT-206", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x30.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAT 206 is the grub-screw locking, one-side-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAT-206-103", "YAT 206-103" ], "locale_variants": {} }, { "sku": "YAR-206-103-2RF-HV", "brand": "SKF", "manufacturer_designation": "YAR 206-103-2RF/HV", "series": "YAR2-series", "type": "insert", "d_mm": 30.162499999999998, "D_mm": 62, "B_mm": 38.1, "material": "SS440C", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 16.3, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 3800, "max_rpm": 3800, "weight_g": 300, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAR 206-103-2RF/HV is a grub-screw insert bearing with the inner ring extended on both sides, 30.162499999999998x62x38.1 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -103 = 30.162 mm, which is why this row sits beside, not on, the metric bore size. HV is the corrosion-resistant food-range variant of the -2RF sealed design — stainless parts plus food-compatible rubber and lubricant, which also explains its lower published C and limiting speed. Envelope 30.162499999999998x62x38.1 mm (1.188x2.441x1.5 in), outer ring 18 mm wide, C 16.3 kN, C0 11.2 kN, Pu 0.475 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,800 r/min; mass 300 g. Outer-vs-overall width: the outer ring is 18 mm wide inside the 38.1 mm total, so the extended inner ring accounts for 0.528 of the overall width (10.05 mm of axial projection per side). Mass-to-load ratio for YAR-206-103-2RF-HV: 18.405 g of catalogue mass per rated kN of C, and 9.946 g per millimetre of bore — useful when comparing executions of the same 30.162499999999998x62 mm envelope on the drawing. Fillet discipline: the printed r_min 0.6 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 30.162499999999998x62 mm insert on its chamfer tilts the whole spherical seat. Spherical-seat note in numbers: the 62 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 46.081 = 144.768 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Envelope arithmetic: the radial section from 30.162499999999998 mm bore to 62 mm OD is 15.919 mm; dividing C 16.3 kN by that section gives 1.024 kN per section millimetre, and the 38.1 mm overall width is 2.393x the section. Stainless food-range note: HV parts trade some capacity for corrosion resistance and food-compatible lubrication, and the printed limiting speed is set for that fill; do not top up with ordinary mineral grease in service — mixing greases can harden the food-grade fill and seize the seals. Service tip for YAR-206-103-2RF-HV: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 15.919 mm radial section.", "applications": [ "ventilation and extraction fans", "garden and groundcare equipment", "small packaging and labelling machines" ], "failure_modes": [ "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 30.162499999999998 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 22.2 mm s1 dimension is the screw seating geometry inside the 20.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Ordering discipline for the 30.162499999999998 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-206-103-2RF-HV?", "a": "The catalogue envelope is 30.162499999999998x62x38.1 mm with a spherical outside surface; mass 300 g. Ratings C 16.3/11.2 kN, Pu 0.475 kN, limiting speed 3,800 r/min." }, { "q": "What does the designation YAR 206-103-2RF/HV mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -103 = 30.162 mm, which is why this row sits beside, not on, the metric bore size. HV is the corrosion-resistant food-range variant of the -2RF sealed design — stainless parts plus food-compatible rubber and lubricant, which also explains its lower published C and limiting speed." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAR-206-2RF-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-2RF/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-2RFGR-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-2RFGR/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YARAG-206", "equiv_brand": "SKF", "level": "partial", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (16.3/11.2 kN vs 19.5/11.2 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-2RF", "equiv_brand": "SKF", "level": "partial", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (16.3/11.2 kN vs 19.5/11.2 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (16.3/11.2 kN vs 19.5/11.2 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (16.3/11.2 kN vs 19.5/11.2 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-103-2RFGR-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-103-2RFGR/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YARAG-206-103", "equiv_brand": "SKF", "level": "partial", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (16.3/11.2 kN vs 19.5/11.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-206-103-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (16.3/11.2 kN vs 19.5/11.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-206-103-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (16.3/11.2 kN vs 19.5/11.2 kN) — envelope match, not a load-rating equivalent." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-206-103-2RF-HV", "YAR 206-103-2RF/HV" ], "locale_variants": {} }, { "sku": "YAR-206-103-2RFGR-HV", "brand": "SKF", "manufacturer_designation": "YAR 206-103-2RFGR/HV", "series": "YAR2-series", "type": "insert", "d_mm": 30.162499999999998, "D_mm": 62, "B_mm": 38.1, "material": "SS440C", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 16.3, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 3800, "max_rpm": 3800, "weight_g": 300, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAR 206-103-2RFGR/HV is a grub-screw insert bearing with the inner ring extended on both sides, 30.162499999999998x62x38.1 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -103 = 30.162 mm, which is why this row sits beside, not on, the metric bore size. HV is the corrosion-resistant food-range variant of the -2RF sealed design — stainless parts plus food-compatible rubber and lubricant, which also explains its lower published C and limiting speed. Envelope 30.162499999999998x62x38.1 mm (1.188x2.441x1.5 in), outer ring 18 mm wide, C 16.3 kN, C0 11.2 kN, Pu 0.475 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,800 r/min; mass 300 g. Grease-life arithmetic is dominated by speed: at dn approx 1.75x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Rating split for the maintenance file: dynamic 16.3 kN (L10), static 11.2 kN (s0 shock check), fatigue 0.475 kN (adjusted life) — three separate uses for YAR 206-103-2RFGR/HV, none interchangeable with another. Static-first planning: the 0.294 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 30.162499999999998 mm shaft, not the 16.3 kN L10 value. At the printed limiting speed of 3,800 r/min the mean diameter dm = 46.081 mm implies dn about 1.75x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Pitch-diameter arithmetic: dm = (30.162499999999998+62)/2 = 46.081 mm; at the 3,800 r/min limiting speed the ball set runs at dn approx 1.75x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Stainless food-range note: HV parts trade some capacity for corrosion resistance and food-compatible lubrication, and the printed limiting speed is set for that fill; do not top up with ordinary mineral grease in service — mixing greases can harden the food-grade fill and seize the seals. Set-screw geometry on this size: the two 120 deg screws bear on the 30.162499999999998 mm shaft inside the 38.1 mm total width while the outer ring is only 18 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "small packaging and labelling machines", "ventilation and extraction fans", "garden and groundcare equipment" ], "failure_modes": [ "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "The 22.2 mm s1 dimension is the screw seating geometry inside the 20.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 30.162499999999998 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 16.3/11.2 kN figures belong specifically to YAR 206-103-2RFGR/HV; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-206-103-2RFGR-HV?", "a": "The catalogue envelope is 30.162499999999998x62x38.1 mm with a spherical outside surface; mass 300 g. Ratings C 16.3/11.2 kN, Pu 0.475 kN, limiting speed 3,800 r/min." }, { "q": "What does the designation YAR 206-103-2RFGR/HV mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -103 = 30.162 mm, which is why this row sits beside, not on, the metric bore size. HV is the corrosion-resistant food-range variant of the -2RF sealed design — stainless parts plus food-compatible rubber and lubricant, which also explains its lower published C and limiting speed." }, { "q": "How do the set screws lock the 30.162499999999998 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." } ], "cross_ref": [ { "equiv_sku": "YAR-206-2RF-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-2RF/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-2RFGR-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-2RFGR/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YARAG-206", "equiv_brand": "SKF", "level": "partial", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (16.3/11.2 kN vs 19.5/11.2 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-2RF", "equiv_brand": "SKF", "level": "partial", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (16.3/11.2 kN vs 19.5/11.2 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (16.3/11.2 kN vs 19.5/11.2 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (16.3/11.2 kN vs 19.5/11.2 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-103-2RF-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-103-2RF/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YARAG-206-103", "equiv_brand": "SKF", "level": "partial", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (16.3/11.2 kN vs 19.5/11.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-206-103-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (16.3/11.2 kN vs 19.5/11.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-206-103-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (16.3/11.2 kN vs 19.5/11.2 kN) — envelope match, not a load-rating equivalent." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-206-103-2RFGR-HV", "YAR 206-103-2RFGR/HV" ], "locale_variants": {} }, { "sku": "YARAG-206-103", "brand": "SKF", "manufacturer_designation": "YARAG 206-103", "series": "YAR2-series", "type": "insert", "d_mm": 30.162499999999998, "D_mm": 62, "B_mm": 38.1, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 19.5, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 1200, "max_rpm": 1200, "weight_g": 300, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YARAG 206-103 is SKF's 30.162499999999998 mm-bore grub-screw insert bearing with the inner ring extended on both sides in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 30.162499999999998x62x38.1 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -103 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 3/16 in = 30.162 mm (first digit whole inches, next two sixteenths of an inch). AG marks the agricultural-machinery application execution, built on the sealed both-sides-extended geometry and tuned for the low-speed, shock-laden duty of harvesters, balers and spreaders — note the catalogue prints a much reduced limiting speed for this variant. Envelope 30.162499999999998x62x38.1 mm (1.188x2.441x1.5 in), outer ring 18 mm wide, C 19.5 kN, C0 11.2 kN, Pu 0.475 kN. The catalogue publishes a single speed ceiling, the limiting speed: 1,200 r/min; mass 300 g. Rating split for the maintenance file: dynamic 19.5 kN (L10), static 11.2 kN (s0 shock check), fatigue 0.475 kN (adjusted life) — three separate uses for YARAG 206-103, none interchangeable with another. Static-first planning: the 0.294 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 30.162499999999998 mm shaft, not the 19.5 kN L10 value. Fillet discipline: the printed r_min 0.6 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 30.162499999999998x62 mm insert on its chamfer tilts the whole spherical seat. Grease-life arithmetic is dominated by speed: at dn approx 0.55x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the AG variant caps speed so aggressively, and high-temperature mounts shorten both even when load is light. Bore-to-OD planning: OD 62 over bore 30.162499999999998 is a 2.056x step, while bore/overall-width gives 0.792; the spherical seat in the matching Y-housing must be specified to the 62 mm OD, not to a cylindrical housing bore. Service tip for YARAG-206-103: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 15.919 mm radial section.", "applications": [ "small packaging and labelling machines", "trough conveyor idler drives", "head- and tail-shaft pillow blocks in unit handling" ], "failure_modes": [ "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "Do not specify the 30.162499999999998 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 22.2 mm s1 dimension is the screw seating geometry inside the 20.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Catalogue ratings belong to YARAG 206-103 as the grub two ag execution; other order numbers of the YARAG 206-103 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YARAG-206-103?", "a": "YARAG 206-103 measures 30.162499999999998 mm bore x 62 mm OD x 38.1 mm overall width (outer ring 18 mm wide), 1.188 x 2.441 x 1.5 in; mass about 300 g. SKF 17000 ratings: C 19.5 kN, C0 11.2 kN, Pu 0.475 kN, limiting speed 1,200 r/min." }, { "q": "What does the designation YARAG 206-103 mean?", "a": "the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -103 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 3/16 in = 30.162 mm (first digit whole inches, next two sixteenths of an inch). AG marks the agricultural-machinery application execution, built on the sealed both-sides-extended geometry and tuned for the low-speed, shock-laden duty of harvesters, balers and spreaders — note the catalogue prints a much reduced limiting speed for this variant." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." } ], "cross_ref": [ { "equiv_sku": "YAR-206-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (19.5/11.2 kN vs 16.3/11.2 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (19.5/11.2 kN vs 16.3/11.2 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YARAG-206", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 206 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-103-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (19.5/11.2 kN vs 16.3/11.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-206-103-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (19.5/11.2 kN vs 16.3/11.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-206-103-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-103-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-206-103-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-103-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YARAG-206-103", "YARAG 206-103" ], "locale_variants": {} }, { "sku": "YAR-206-103-2RF-VE495", "brand": "SKF", "manufacturer_designation": "YAR 206-103-2RF/VE495", "series": "YAR2-series", "type": "insert", "d_mm": 30.162499999999998, "D_mm": 62, "B_mm": 38.1, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 19.5, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 3800, "max_rpm": 3800, "weight_g": 300, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YAR 206-103-2RF/VE495 is SKF's 30.162499999999998 mm-bore grub-screw insert bearing with the inner ring extended on both sides in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 30.162499999999998x62x38.1 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -103 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 3/16 in = 30.162 mm (first digit whole inches, next two sixteenths of an inch). /VE495 is the zinc-plated food-industry execution: zinc-coated inner and outer rings, seals and flingers with stainless-steel inserts in food-compatible rubber, and food-grade grease fill. Envelope 30.162499999999998x62x38.1 mm (1.188x2.441x1.5 in), outer ring 18 mm wide, C 19.5 kN, C0 11.2 kN, Pu 0.475 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,800 r/min; mass 300 g. Width accounting on this execution: 38.1 mm overall and 18 mm outer-ring width leave the housing designer 20.1 mm of inner-ring projection to accommodate the locking arrangement. Imperial procurement cross-check: 1.188 in bore, 2.441 in OD, 1.5 in overall width; the 300 g mass converts to 0.300 kg (10.6 oz) for the bill of materials. The s1 22.2 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Spherical-seat note in numbers: the 62 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 46.081 = 144.768 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 39.7 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the inner flinger. Zinc-coated food-range note: the VE495 plating is a functional surface, not cosmetic; clean the bore and shaft WITHOUT steel brushes or aggressive descalers, mount dry or with the approved food-grade mounting paste, and touch up damaged plating spots before commissioning the wash-down area. Service tip for YAR-206-103-2RF-VE495: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 15.919 mm radial section.", "applications": [ "ventilation and extraction fans", "head- and tail-shaft pillow blocks in unit handling", "small packaging and labelling machines" ], "failure_modes": [ "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "The 22.2 mm s1 dimension is the screw seating geometry inside the 20.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 30.162499999999998 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 19.5/11.2 kN figures belong specifically to YAR 206-103-2RF/VE495; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-206-103-2RF-VE495?", "a": "YAR 206-103-2RF/VE495 measures 30.162499999999998 mm bore x 62 mm OD x 38.1 mm overall width (outer ring 18 mm wide), 1.188 x 2.441 x 1.5 in; mass about 300 g. SKF 17000 ratings: C 19.5 kN, C0 11.2 kN, Pu 0.475 kN, limiting speed 3,800 r/min." }, { "q": "What does the designation YAR 206-103-2RF/VE495 mean?", "a": "the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -103 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 3/16 in = 30.162 mm (first digit whole inches, next two sixteenths of an inch). /VE495 is the zinc-plated food-industry execution: zinc-coated inner and outer rings, seals and flingers with stainless-steel inserts in food-compatible rubber, and food-grade grease fill." }, { "q": "How is YAR-206-103-2RF-VE495 lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." }, { "q": "How do the set screws lock the 30.162499999999998 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." } ], "cross_ref": [ { "equiv_sku": "YAR-206-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (19.5/11.2 kN vs 16.3/11.2 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (19.5/11.2 kN vs 16.3/11.2 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YARAG-206", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 206 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-103-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (19.5/11.2 kN vs 16.3/11.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-206-103-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (19.5/11.2 kN vs 16.3/11.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YARAG-206-103", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 206-103 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-206-103-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-103-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-206-103-2RF-VE495", "YAR 206-103-2RF/VE495" ], "locale_variants": {} }, { "sku": "YAR-206-103-2F", "brand": "SKF", "manufacturer_designation": "YAR 206-103-2F", "series": "YAR2-series", "type": "insert", "d_mm": 30.162499999999998, "D_mm": 62, "B_mm": 38.1, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 19.5, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 6300, "max_rpm": 6300, "weight_g": 300, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YAR 206-103-2F is SKF's 30.162499999999998 mm-bore grub-screw insert bearing with the inner ring extended on both sides in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 30.162499999999998x62x38.1 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -103 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 3/16 in = 30.162 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 30.162499999999998x62x38.1 mm (1.188x2.441x1.5 in), outer ring 18 mm wide, C 19.5 kN, C0 11.2 kN, Pu 0.475 kN. The catalogue publishes a single speed ceiling, the limiting speed: 6,300 r/min; mass 300 g. Imperial procurement cross-check: 1.188 in bore, 2.441 in OD, 1.5 in overall width; the 300 g mass converts to 0.300 kg (10.6 oz) for the bill of materials. Speed ceiling of 6,300 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Static-first planning: the 0.294 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 30.162499999999998 mm shaft, not the 19.5 kN L10 value. Fillet discipline: the printed r_min 0.6 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 30.162499999999998x62 mm insert on its chamfer tilts the whole spherical seat. Fatigue-limit check: Pu 0.475 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YAR 206-103-2F — most belt-driven mounted-unit loads sit comfortably under 2.436 % of C. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Service tip for YAR-206-103-2F: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 15.919 mm radial section.", "applications": [ "trough conveyor idler drives", "head- and tail-shaft pillow blocks in unit handling", "ventilation and extraction fans" ], "failure_modes": [ "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 22.2 mm s1 dimension is the screw seating geometry inside the 20.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 30.162499999999998 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Ordering discipline for the 30.162499999999998 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-206-103-2F?", "a": "YAR 206-103-2F measures 30.162499999999998 mm bore x 62 mm OD x 38.1 mm overall width (outer ring 18 mm wide), 1.188 x 2.441 x 1.5 in; mass about 300 g. SKF 17000 ratings: C 19.5 kN, C0 11.2 kN, Pu 0.475 kN, limiting speed 6,300 r/min." }, { "q": "What does the designation YAR 206-103-2F mean?", "a": "the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -103 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 3/16 in = 30.162 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "How is YAR-206-103-2F lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." }, { "q": "How do the set screws lock the 30.162499999999998 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." } ], "cross_ref": [ { "equiv_sku": "YAR-206-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (19.5/11.2 kN vs 16.3/11.2 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (19.5/11.2 kN vs 16.3/11.2 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YARAG-206", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 206 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-206-103-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (19.5/11.2 kN vs 16.3/11.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-206-103-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (19.5/11.2 kN vs 16.3/11.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YARAG-206-103", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 206-103 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-206-103-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-103-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-206-103-2F", "YAR 206-103-2F" ], "locale_variants": {} }, { "sku": "YAT-206-104", "brand": "SKF", "manufacturer_designation": "YAT 206-104", "series": "YAR2-series", "type": "insert", "d_mm": 31.75, "D_mm": 62, "B_mm": 30.2, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 19.5, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 6300, "max_rpm": 6300, "weight_g": 240, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAT 206-104 is a SKF insert bearing (Y-bearing) for a 31.75 mm (1.25 in) shaft: grub-screw insert bearing with the inner ring extended on one side, built to the ISO 15 diameter-series envelope with a sphered OD of 62 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAT basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAT carries the one-side-extended inner ring. inch bore code -104 decodes as 1\" +4/16, i.e. 31.75 mm; the metric coded size YAT 206 shares the same envelope but its bore is the metric value, not this one. with no -2F/-2RF suffix the order number denotes the open external execution of the YAR2 size — add external exclusion at the housing and plan relubrication intervals for dusty or wet surroundings. Envelope 31.75x62x30.2 mm (1.25x2.441x1.189 in), outer ring 18 mm wide, C 19.5 kN, C0 11.2 kN, Pu 0.475 kN. The catalogue publishes a single speed ceiling, the limiting speed: 6,300 r/min; mass 240 g. At the printed limiting speed of 6,300 r/min the mean diameter dm = 46.875 mm implies dn about 2.95x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Grease-life arithmetic is dominated by speed: at dn approx 2.95x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Imperial procurement cross-check: 1.25 in bore, 2.441 in OD, 1.189 in overall width; the 240 g mass converts to 0.240 kg (8.5 oz) for the bill of materials. Bore-to-OD planning: OD 62 over bore 31.75 is a 1.953x step, while bore/overall-width gives 1.051; the spherical seat in the matching Y-housing must be specified to the 62 mm OD, not to a cylindrical housing bore. Speed ceiling of 6,300 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Single-extension fitting note: with the inner ring extended only on the locking side, orient the open (non-extended) face toward the shaft step or housing shoulder as the drawing shows — reversed, the set screws end up unsupported by the abutment and the shortened side offers no seal land at all. Set-screw geometry on this size: the two 120 deg screws bear on the 31.75 mm shaft inside the 30.2 mm total width while the outer ring is only 18 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "trough conveyor idler drives", "garden and groundcare equipment", "ventilation and extraction fans" ], "failure_modes": [ "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "Do not specify the 31.75 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 21 mm s1 dimension is the screw seating geometry inside the 12.2 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a one-side YAT insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Catalogue ratings belong to YAT 206-104 as the grub one open execution; other order numbers of the YAT 206-104 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAT-206-104?", "a": "Boundary dimensions: bore 31.75 mm, sphered OD 62 mm, overall width 30.2 mm; weight 240 g. Loads: dynamic 19.5 kN, static 11.2 kN, fatigue 0.475 kN; the only published speed is the 6,300 r/min limiting value." }, { "q": "What does the designation YAT 206-104 mean?", "a": "reading the YAT basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAT carries the one-side-extended inner ring. inch bore code -104 decodes as 1\" +4/16, i.e. 31.75 mm; the metric coded size YAT 206 shares the same envelope but its bore is the metric value, not this one. with no -2F/-2RF suffix the order number denotes the open external execution of the YAR2 size — add external exclusion at the housing and plan relubrication intervals for dusty or wet surroundings." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAT", "equiv_brand": "ISO 15", "level": "full", "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAT-206-104", "YAT 206-104" ], "locale_variants": {} }, { "sku": "YAR-206-104-2RF-HV", "brand": "SKF", "manufacturer_designation": "YAR 206-104-2RF/HV", "series": "YAR2-series", "type": "insert", "d_mm": 31.75, "D_mm": 62, "B_mm": 38.1, "material": "SS440C", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 16.3, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 3800, "max_rpm": 3800, "weight_g": 280, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 206-104-2RF/HV is a SKF insert bearing (Y-bearing) for a 31.75 mm (1.25 in) shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 62 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -104 decodes as 1\" +4/16, i.e. 31.75 mm; the metric coded size YAR 206 shares the same envelope but its bore is the metric value, not this one. the HV suffix means stainless rings and balls with food-grade compliant seals and grease; capacity is derated versus the carbon-steel part. Envelope 31.75x62x38.1 mm (1.25x2.441x1.5 in), outer ring 18 mm wide, C 16.3 kN, C0 11.2 kN, Pu 0.475 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,800 r/min; mass 280 g. At the printed limiting speed of 3,800 r/min the mean diameter dm = 46.875 mm implies dn about 1.78x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Grease-life arithmetic is dominated by speed: at dn approx 1.78x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Spherical-seat note in numbers: the 62 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 46.875 = 147.262 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Rating split for the maintenance file: dynamic 16.3 kN (L10), static 11.2 kN (s0 shock check), fatigue 0.475 kN (adjusted life) — three separate uses for YAR 206-104-2RF/HV, none interchangeable with another. Fillet discipline: the printed r_min 0.6 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 31.75x62 mm insert on its chamfer tilts the whole spherical seat. Stainless food-range note: HV parts trade some capacity for corrosion resistance and food-compatible lubrication, and the printed limiting speed is set for that fill; do not top up with ordinary mineral grease in service — mixing greases can harden the food-grade fill and seize the seals. Set-screw geometry on this size: the two 120 deg screws bear on the 31.75 mm shaft inside the 38.1 mm total width while the outer ring is only 18 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "ventilation and extraction fans", "garden and groundcare equipment", "small packaging and labelling machines" ], "failure_modes": [ "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 31.75 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 22.2 mm s1 dimension is the screw seating geometry inside the 20.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Ordering discipline for the 31.75 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-206-104-2RF-HV?", "a": "Boundary dimensions: bore 31.75 mm, sphered OD 62 mm, overall width 38.1 mm; weight 280 g. Loads: dynamic 16.3 kN, static 11.2 kN, fatigue 0.475 kN; the only published speed is the 3,800 r/min limiting value." }, { "q": "What does the designation YAR 206-104-2RF/HV mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -104 decodes as 1\" +4/16, i.e. 31.75 mm; the metric coded size YAR 206 shares the same envelope but its bore is the metric value, not this one. the HV suffix means stainless rings and balls with food-grade compliant seals and grease; capacity is derated versus the carbon-steel part." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAR-206-104-2RFGR-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 31.75x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-104-2RFGR/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YARAG-206-104", "equiv_brand": "SKF", "level": "partial", "note": "Same 31.75x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (16.3/11.2 kN vs 19.5/11.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-206-104-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 31.75x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (16.3/11.2 kN vs 19.5/11.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-206-104-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 31.75x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (16.3/11.2 kN vs 19.5/11.2 kN) — envelope match, not a load-rating equivalent." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-206-104-2RF-HV", "YAR 206-104-2RF/HV" ], "locale_variants": {} }, { "sku": "YAR-206-104-2RFGR-HV", "brand": "SKF", "manufacturer_designation": "YAR 206-104-2RFGR/HV", "series": "YAR2-series", "type": "insert", "d_mm": 31.75, "D_mm": 62, "B_mm": 38.1, "material": "SS440C", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 16.3, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 3800, "max_rpm": 3800, "weight_g": 280, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YAR 206-104-2RFGR/HV is SKF's 31.75 mm-bore grub-screw insert bearing with the inner ring extended on both sides in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 31.75x62x38.1 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -104 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 4/16 in = 31.75 mm (first digit whole inches, next two sixteenths of an inch). /HV identifies the stainless-steel, food-industry execution: stainless bearing components, food-compatible rubber in the seal/flinger set and food-grade grease fill — the catalogue ratings are correspondingly below the standard steel version, and the GR marking adds the lubrication groove in the sphered outside surface on the locking side. Envelope 31.75x62x38.1 mm (1.25x2.441x1.5 in), outer ring 18 mm wide, C 16.3 kN, C0 11.2 kN, Pu 0.475 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,800 r/min; mass 280 g. Rating split for the maintenance file: dynamic 16.3 kN (L10), static 11.2 kN (s0 shock check), fatigue 0.475 kN (adjusted life) — three separate uses for YAR 206-104-2RFGR/HV, none interchangeable with another. Bore-to-OD planning: OD 62 over bore 31.75 is a 1.953x step, while bore/overall-width gives 0.833; the spherical seat in the matching Y-housing must be specified to the 62 mm OD, not to a cylindrical housing bore. Imperial procurement cross-check: 1.25 in bore, 2.441 in OD, 1.5 in overall width; the 280 g mass converts to 0.280 kg (9.9 oz) for the bill of materials. Speed ceiling of 3,800 r/min is the catalogue mechanical limit for THIS execution; the stainless/food-grade HV fill sets this lower value, so real fan duty is planned well below it. Spherical-seat note in numbers: the 62 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 46.875 = 147.262 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Stainless food-range note: HV parts trade some capacity for corrosion resistance and food-compatible lubrication, and the printed limiting speed is set for that fill; do not top up with ordinary mineral grease in service — mixing greases can harden the food-grade fill and seize the seals. Service tip for YAR-206-104-2RFGR-HV: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 15.125 mm radial section.", "applications": [ "trough conveyor idler drives", "ventilation and extraction fans", "small packaging and labelling machines" ], "failure_modes": [ "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 31.75 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 22.2 mm s1 dimension is the screw seating geometry inside the 20.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Ordering discipline for the 31.75 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-206-104-2RFGR-HV?", "a": "YAR 206-104-2RFGR/HV measures 31.75 mm bore x 62 mm OD x 38.1 mm overall width (outer ring 18 mm wide), 1.25 x 2.441 x 1.5 in; mass about 280 g. SKF 17000 ratings: C 16.3 kN, C0 11.2 kN, Pu 0.475 kN, limiting speed 3,800 r/min." }, { "q": "What does the designation YAR 206-104-2RFGR/HV mean?", "a": "the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -104 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 4/16 in = 31.75 mm (first digit whole inches, next two sixteenths of an inch). /HV identifies the stainless-steel, food-industry execution: stainless bearing components, food-compatible rubber in the seal/flinger set and food-grade grease fill — the catalogue ratings are correspondingly below the standard steel version, and the GR marking adds the lubrication groove in the sphered outside surface on the locking side." }, { "q": "How do the set screws lock the 31.75 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." } ], "cross_ref": [ { "equiv_sku": "YAR-206-104-2RF-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 31.75x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-104-2RF/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YARAG-206-104", "equiv_brand": "SKF", "level": "partial", "note": "Same 31.75x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (16.3/11.2 kN vs 19.5/11.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-206-104-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 31.75x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (16.3/11.2 kN vs 19.5/11.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-206-104-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 31.75x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (16.3/11.2 kN vs 19.5/11.2 kN) — envelope match, not a load-rating equivalent." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-206-104-2RFGR-HV", "YAR 206-104-2RFGR/HV" ], "locale_variants": {} }, { "sku": "YARAG-206-104", "brand": "SKF", "manufacturer_designation": "YARAG 206-104", "series": "YAR2-series", "type": "insert", "d_mm": 31.75, "D_mm": 62, "B_mm": 38.1, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 19.5, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 1200, "max_rpm": 1200, "weight_g": 270, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YARAG 206-104 is a SKF insert bearing (Y-bearing) for a 31.75 mm (1.25 in) shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 62 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -104 decodes as 1\" +4/16, i.e. 31.75 mm; the metric coded size YARAG 206 shares the same envelope but its bore is the metric value, not this one. the AG suffix identifies the farm-duty variant of the range: sealed and flinger-protected for chaff and dust, with the catalogue deliberately derating its permissible speed versus the industrial execution. Envelope 31.75x62x38.1 mm (1.25x2.441x1.5 in), outer ring 18 mm wide, C 19.5 kN, C0 11.2 kN, Pu 0.475 kN. The catalogue publishes a single speed ceiling, the limiting speed: 1,200 r/min; mass 270 g. Load balance for documentation: C0 11.2 kN against C 19.5 kN gives a 0.574 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Grease-life arithmetic is dominated by speed: at dn approx 0.56x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the AG variant caps speed so aggressively, and high-temperature mounts shorten both even when load is light. Mass-to-load ratio for YARAG-206-104: 13.846 g of catalogue mass per rated kN of C, and 8.504 g per millimetre of bore — useful when comparing executions of the same 31.75x62 mm envelope on the drawing. Fillet discipline: the printed r_min 0.6 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 31.75x62 mm insert on its chamfer tilts the whole spherical seat. Capacity density: 19.5 kN from 0.270 kg of bearing steel is about 72.222 kN per kilogram, and per width millimetre the 38.1 mm unit carries 0.512 kN of dynamic capacity. Service tip for YARAG-206-104: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 15.125 mm radial section.", "applications": [ "trough conveyor idler drives", "garden and groundcare equipment", "ventilation and extraction fans" ], "failure_modes": [ "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 22.2 mm s1 dimension is the screw seating geometry inside the 20.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 31.75 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Ordering discipline for the 31.75 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YARAG-206-104?", "a": "Boundary dimensions: bore 31.75 mm, sphered OD 62 mm, overall width 38.1 mm; weight 270 g. Loads: dynamic 19.5 kN, static 11.2 kN, fatigue 0.475 kN; the only published speed is the 1,200 r/min limiting value." }, { "q": "What does the designation YARAG 206-104 mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -104 decodes as 1\" +4/16, i.e. 31.75 mm; the metric coded size YARAG 206 shares the same envelope but its bore is the metric value, not this one. the AG suffix identifies the farm-duty variant of the range: sealed and flinger-protected for chaff and dust, with the catalogue deliberately derating its permissible speed versus the industrial execution." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAR-206-104-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 31.75x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (19.5/11.2 kN vs 16.3/11.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-206-104-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 31.75x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (19.5/11.2 kN vs 16.3/11.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-206-104-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 31.75x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-104-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-206-104-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 31.75x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-104-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YARAG-206-104", "YARAG 206-104" ], "locale_variants": {} }, { "sku": "YAR-206-104-2RF-VE495", "brand": "SKF", "manufacturer_designation": "YAR 206-104-2RF/VE495", "series": "YAR2-series", "type": "insert", "d_mm": 31.75, "D_mm": 62, "B_mm": 38.1, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 19.5, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 3800, "max_rpm": 3800, "weight_g": 280, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YAR 206-104-2RF/VE495 is SKF's 31.75 mm-bore grub-screw insert bearing with the inner ring extended on both sides in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 31.75x62x38.1 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -104 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 4/16 in = 31.75 mm (first digit whole inches, next two sixteenths of an inch). /VE495 is the zinc-plated food-industry execution: zinc-coated inner and outer rings, seals and flingers with stainless-steel inserts in food-compatible rubber, and food-grade grease fill. Envelope 31.75x62x38.1 mm (1.25x2.441x1.5 in), outer ring 18 mm wide, C 19.5 kN, C0 11.2 kN, Pu 0.475 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,800 r/min; mass 280 g. Imperial procurement cross-check: 1.25 in bore, 2.441 in OD, 1.5 in overall width; the 280 g mass converts to 0.280 kg (9.9 oz) for the bill of materials. Outer-vs-overall width: the outer ring is 18 mm wide inside the 38.1 mm total, so the extended inner ring accounts for 0.528 of the overall width (10.05 mm of axial projection per side). Load balance for documentation: C0 11.2 kN against C 19.5 kN gives a 0.574 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Fillet discipline: the printed r_min 0.6 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 31.75x62 mm insert on its chamfer tilts the whole spherical seat. Grease-life arithmetic is dominated by speed: at dn approx 1.78x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Zinc-coated food-range note: the VE495 plating is a functional surface, not cosmetic; clean the bore and shaft WITHOUT steel brushes or aggressive descalers, mount dry or with the approved food-grade mounting paste, and touch up damaged plating spots before commissioning the wash-down area. Service tip for YAR-206-104-2RF-VE495: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 15.125 mm radial section.", "applications": [ "trough conveyor idler drives", "garden and groundcare equipment", "ventilation and extraction fans" ], "failure_modes": [ "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "Do not specify the 31.75 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 22.2 mm s1 dimension is the screw seating geometry inside the 20.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Catalogue ratings belong to YAR 206-104-2RF/VE495 as the grub two ve495 execution; other order numbers of the YAR 206-104 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-206-104-2RF-VE495?", "a": "YAR 206-104-2RF/VE495 measures 31.75 mm bore x 62 mm OD x 38.1 mm overall width (outer ring 18 mm wide), 1.25 x 2.441 x 1.5 in; mass about 280 g. SKF 17000 ratings: C 19.5 kN, C0 11.2 kN, Pu 0.475 kN, limiting speed 3,800 r/min." }, { "q": "What does the designation YAR 206-104-2RF/VE495 mean?", "a": "the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -104 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 4/16 in = 31.75 mm (first digit whole inches, next two sixteenths of an inch). /VE495 is the zinc-plated food-industry execution: zinc-coated inner and outer rings, seals and flingers with stainless-steel inserts in food-compatible rubber, and food-grade grease fill." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAR-206-104-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 31.75x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (19.5/11.2 kN vs 16.3/11.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-206-104-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 31.75x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (19.5/11.2 kN vs 16.3/11.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YARAG-206-104", "equiv_brand": "SKF", "level": "full", "note": "Same 31.75x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 206-104 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-206-104-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 31.75x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-104-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-206-104-2RF-VE495", "YAR 206-104-2RF/VE495" ], "locale_variants": {} }, { "sku": "YAR-206-104-2F", "brand": "SKF", "manufacturer_designation": "YAR 206-104-2F", "series": "YAR2-series", "type": "insert", "d_mm": 31.75, "D_mm": 62, "B_mm": 38.1, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 19.5, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 6300, "max_rpm": 6300, "weight_g": 280, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAR 206-104-2F is a grub-screw insert bearing with the inner ring extended on both sides, 31.75x62x38.1 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -104 = 31.75 mm, which is why this row sits beside, not on, the metric bore size. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution. Envelope 31.75x62x38.1 mm (1.25x2.441x1.5 in), outer ring 18 mm wide, C 19.5 kN, C0 11.2 kN, Pu 0.475 kN. The catalogue publishes a single speed ceiling, the limiting speed: 6,300 r/min; mass 280 g. Width accounting on this execution: 38.1 mm overall and 18 mm outer-ring width leave the housing designer 20.1 mm of inner-ring projection to accommodate the locking arrangement. Fillet discipline: the printed r_min 0.6 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 31.75x62 mm insert on its chamfer tilts the whole spherical seat. Mass-to-load ratio for YAR-206-104-2F: 14.359 g of catalogue mass per rated kN of C, and 8.819 g per millimetre of bore — useful when comparing executions of the same 31.75x62 mm envelope on the drawing. Load balance for documentation: C0 11.2 kN against C 19.5 kN gives a 0.574 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Envelope arithmetic: the radial section from 31.75 mm bore to 62 mm OD is 15.125 mm; dividing C 19.5 kN by that section gives 1.289 kN per section millimetre, and the 38.1 mm overall width is 2.519x the section. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Service tip for YAR-206-104-2F: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 15.125 mm radial section.", "applications": [ "head- and tail-shaft pillow blocks in unit handling", "garden and groundcare equipment", "trough conveyor idler drives" ], "failure_modes": [ "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "Do not specify the 31.75 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 22.2 mm s1 dimension is the screw seating geometry inside the 20.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Catalogue ratings belong to YAR 206-104-2F as the grub two f execution; other order numbers of the YAR 206-104 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-206-104-2F?", "a": "The catalogue envelope is 31.75x62x38.1 mm with a spherical outside surface; mass 280 g. Ratings C 19.5/11.2 kN, Pu 0.475 kN, limiting speed 6,300 r/min." }, { "q": "What does the designation YAR 206-104-2F mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -104 = 31.75 mm, which is why this row sits beside, not on, the metric bore size. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution." }, { "q": "How is YAR-206-104-2F lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." }, { "q": "How do the set screws lock the 31.75 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." } ], "cross_ref": [ { "equiv_sku": "YAR-206-104-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 31.75x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (19.5/11.2 kN vs 16.3/11.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-206-104-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 31.75x62x38.1 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (19.5/11.2 kN vs 16.3/11.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YARAG-206-104", "equiv_brand": "SKF", "level": "full", "note": "Same 31.75x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 206-104 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-206-104-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 31.75x62x38.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 206-104-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-206-104-2F", "YAR 206-104-2F" ], "locale_variants": {} }, { "sku": "YAR-207-104-2RF-HV", "brand": "SKF", "manufacturer_designation": "YAR 207-104-2RF/HV", "series": "YAR2-series", "type": "insert", "d_mm": 31.75, "D_mm": 72, "B_mm": 42.9, "material": "SS440C", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 21.6, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 3200, "max_rpm": 3200, "weight_g": 500, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAR 207-104-2RF/HV is a grub-screw insert bearing with the inner ring extended on both sides, 31.75x72x42.9 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -104 = 31.75 mm, which is why this row sits beside, not on, the metric bore size. HV is the corrosion-resistant food-range variant of the -2RF sealed design — stainless parts plus food-compatible rubber and lubricant, which also explains its lower published C and limiting speed. Envelope 31.75x72x42.9 mm (1.25x2.835x1.689 in), outer ring 19 mm wide, C 21.6 kN, C0 15.3 kN, Pu 0.655 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,200 r/min; mass 500 g. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 46.1 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the inner flinger. Load balance for documentation: C0 15.3 kN against C 21.6 kN gives a 0.708 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Pitch-diameter arithmetic: dm = (31.75+72)/2 = 51.875 mm; at the 3,200 r/min limiting speed the ball set runs at dn approx 1.66x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. The s1 25.4 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Rating split for the maintenance file: dynamic 21.6 kN (L10), static 15.3 kN (s0 shock check), fatigue 0.655 kN (adjusted life) — three separate uses for YAR 207-104-2RF/HV, none interchangeable with another. Stainless food-range note: HV parts trade some capacity for corrosion resistance and food-compatible lubrication, and the printed limiting speed is set for that fill; do not top up with ordinary mineral grease in service — mixing greases can harden the food-grade fill and seize the seals. Service tip for YAR-207-104-2RF-HV: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 20.125 mm radial section.", "applications": [ "garden and groundcare equipment", "small packaging and labelling machines", "trough conveyor idler drives" ], "failure_modes": [ "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "The 25.4 mm s1 dimension is the screw seating geometry inside the 23.9 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 31.75 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 21.6/15.3 kN figures belong specifically to YAR 207-104-2RF/HV; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-207-104-2RF-HV?", "a": "The catalogue envelope is 31.75x72x42.9 mm with a spherical outside surface; mass 500 g. Ratings C 21.6/15.3 kN, Pu 0.655 kN, limiting speed 3,200 r/min." }, { "q": "What does the designation YAR 207-104-2RF/HV mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -104 = 31.75 mm, which is why this row sits beside, not on, the metric bore size. HV is the corrosion-resistant food-range variant of the -2RF sealed design — stainless parts plus food-compatible rubber and lubricant, which also explains its lower published C and limiting speed." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAR-207-104-2RFGR-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 31.75x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-104-2RFGR/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YARAG-207-104", "equiv_brand": "SKF", "level": "partial", "note": "Same 31.75x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-104-2RF", "equiv_brand": "SKF", "level": "partial", "note": "Same 31.75x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-104-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 31.75x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-104-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 31.75x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-207-104-2RF-HV", "YAR 207-104-2RF/HV" ], "locale_variants": {} }, { "sku": "YAR-207-104-2RFGR-HV", "brand": "SKF", "manufacturer_designation": "YAR 207-104-2RFGR/HV", "series": "YAR2-series", "type": "insert", "d_mm": 31.75, "D_mm": 72, "B_mm": 42.9, "material": "SS440C", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 21.6, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 3200, "max_rpm": 3200, "weight_g": 500, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 207-104-2RFGR/HV is a SKF insert bearing (Y-bearing) for a 31.75 mm (1.25 in) shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 72 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -104 decodes as 1\" +4/16, i.e. 31.75 mm; the metric coded size YAR 207 shares the same envelope but its bore is the metric value, not this one. the HV suffix means stainless rings and balls with food-grade compliant seals and grease (this article also carries the GR outside-surface lubrication groove); capacity is derated versus the carbon-steel part. Envelope 31.75x72x42.9 mm (1.25x2.835x1.689 in), outer ring 19 mm wide, C 21.6 kN, C0 15.3 kN, Pu 0.655 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,200 r/min; mass 500 g. Selection figures for YAR 207-104-2RFGR/HV: C0/C is 0.708, Pu 0.655 kN is 3.032 % of the 21.6 kN dynamic rating, and the 500 g catalogue mass works out to roughly 15.748 g per millimetre of the 31.75 mm bore. Width accounting on this execution: 42.9 mm overall and 19 mm outer-ring width leave the housing designer 23.9 mm of inner-ring projection to accommodate the locking arrangement. Grease-life arithmetic is dominated by speed: at dn approx 1.66x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Spherical-seat note in numbers: the 72 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 51.875 = 162.97 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Capacity density: 21.6 kN from 0.500 kg of bearing steel is about 43.2 kN per kilogram, and per width millimetre the 42.9 mm unit carries 0.503 kN of dynamic capacity. Stainless food-range note: HV parts trade some capacity for corrosion resistance and food-compatible lubrication, and the printed limiting speed is set for that fill; do not top up with ordinary mineral grease in service — mixing greases can harden the food-grade fill and seize the seals. Set-screw geometry on this size: the two 120 deg screws bear on the 31.75 mm shaft inside the 42.9 mm total width while the outer ring is only 19 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "ventilation and extraction fans", "small packaging and labelling machines", "trough conveyor idler drives" ], "failure_modes": [ "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "relubricated with incompatible grease that hardens the factory fill and drags the seals" ], "pitfalls": [ "Do not specify the 31.75 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 25.4 mm s1 dimension is the screw seating geometry inside the 23.9 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Catalogue ratings belong to YAR 207-104-2RFGR/HV as the grub two hv execution; other order numbers of the YAR 207-104 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-207-104-2RFGR-HV?", "a": "Boundary dimensions: bore 31.75 mm, sphered OD 72 mm, overall width 42.9 mm; weight 500 g. Loads: dynamic 21.6 kN, static 15.3 kN, fatigue 0.655 kN; the only published speed is the 3,200 r/min limiting value." }, { "q": "What does the designation YAR 207-104-2RFGR/HV mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -104 decodes as 1\" +4/16, i.e. 31.75 mm; the metric coded size YAR 207 shares the same envelope but its bore is the metric value, not this one. the HV suffix means stainless rings and balls with food-grade compliant seals and grease (this article also carries the GR outside-surface lubrication groove); capacity is derated versus the carbon-steel part." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." } ], "cross_ref": [ { "equiv_sku": "YAR-207-104-2RF-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 31.75x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-104-2RF/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YARAG-207-104", "equiv_brand": "SKF", "level": "partial", "note": "Same 31.75x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-104-2RF", "equiv_brand": "SKF", "level": "partial", "note": "Same 31.75x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-104-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 31.75x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-104-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 31.75x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-207-104-2RFGR-HV", "YAR 207-104-2RFGR/HV" ], "locale_variants": {} }, { "sku": "YARAG-207-104", "brand": "SKF", "manufacturer_designation": "YARAG 207-104", "series": "YAR2-series", "type": "insert", "d_mm": 31.75, "D_mm": 72, "B_mm": 42.9, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 1100, "max_rpm": 1100, "weight_g": 490, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YARAG 207-104 is a grub-screw insert bearing with the inner ring extended on both sides, 31.75x72x42.9 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -104 = 31.75 mm, which is why this row sits beside, not on, the metric bore size. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery. Envelope 31.75x72x42.9 mm (1.25x2.835x1.689 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. The catalogue publishes a single speed ceiling, the limiting speed: 1,100 r/min; mass 490 g. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 31.75x72 mm insert on its chamfer tilts the whole spherical seat. Selection figures for YARAG 207-104: C0/C is 0.6, Pu 0.655 kN is 2.569 % of the 25.5 kN dynamic rating, and the 490 g catalogue mass works out to roughly 15.433 g per millimetre of the 31.75 mm bore. Pitch-diameter arithmetic: dm = (31.75+72)/2 = 51.875 mm; at the 1,100 r/min limiting speed the ball set runs at dn approx 0.57x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Load balance for documentation: C0 15.3 kN against C 25.5 kN gives a 0.6 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Rating split for the maintenance file: dynamic 25.5 kN (L10), static 15.3 kN (s0 shock check), fatigue 0.655 kN (adjusted life) — three separate uses for YARAG 207-104, none interchangeable with another. Set-screw geometry on this size: the two 120 deg screws bear on the 31.75 mm shaft inside the 42.9 mm total width while the outer ring is only 19 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "ventilation and extraction fans", "head- and tail-shaft pillow blocks in unit handling", "small packaging and labelling machines" ], "failure_modes": [ "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "Do not specify the 31.75 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 25.4 mm s1 dimension is the screw seating geometry inside the 23.9 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Catalogue ratings belong to YARAG 207-104 as the grub two ag execution; other order numbers of the YARAG 207-104 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YARAG-207-104?", "a": "The catalogue envelope is 31.75x72x42.9 mm with a spherical outside surface; mass 490 g. Ratings C 25.5/15.3 kN, Pu 0.655 kN, limiting speed 1,100 r/min." }, { "q": "What does the designation YARAG 207-104 mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -104 = 31.75 mm, which is why this row sits beside, not on, the metric bore size. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery." }, { "q": "How is YARAG-207-104 lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." }, { "q": "How do the set screws lock the 31.75 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." } ], "cross_ref": [ { "equiv_sku": "YAR-207-104-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 31.75x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-104-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 31.75x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-104-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 31.75x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-104-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-207-104-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 31.75x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-104-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-207-104-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 31.75x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-104-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YARAG-207-104", "YARAG 207-104" ], "locale_variants": {} }, { "sku": "YAR-207-104-2RF", "brand": "SKF", "manufacturer_designation": "YAR 207-104-2RF", "series": "YAR2-series", "type": "insert", "d_mm": 31.75, "D_mm": 72, "B_mm": 42.9, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 3200, "max_rpm": 3200, "weight_g": 510, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAR 207-104-2RF is a grub-screw insert bearing with the inner ring extended on both sides, 31.75x72x42.9 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -104 = 31.75 mm, which is why this row sits beside, not on, the metric bore size. the -2RF external design combines contact nitrile seals with rubberized additional flingers on both sides for a tighter labyrinth than the plain-flinger -2F execution. Envelope 31.75x72x42.9 mm (1.25x2.835x1.689 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,200 r/min; mass 510 g. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 46.1 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the rubberized flinger. Spherical-seat note in numbers: the 72 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 51.875 = 162.97 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Envelope arithmetic: the radial section from 31.75 mm bore to 72 mm OD is 20.125 mm; dividing C 25.5 kN by that section gives 1.267 kN per section millimetre, and the 42.9 mm overall width is 2.132x the section. Outer-vs-overall width: the outer ring is 19 mm wide inside the 42.9 mm total, so the extended inner ring accounts for 0.557 of the overall width (11.95 mm of axial projection per side). The s1 25.4 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Rubberized-flinger note: the -2RF coated throwers are vulcanized assemblies — never lever or hammer against the flinger when mounting, and press only on the inner ring when the bearing is fitted loose before the housing cap closes, or the flinger lip folds inward and grinds on the inner ring. Set-screw geometry on this size: the two 120 deg screws bear on the 31.75 mm shaft inside the 42.9 mm total width while the outer ring is only 19 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "ventilation and extraction fans", "trough conveyor idler drives", "small packaging and labelling machines" ], "failure_modes": [ "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "Do not specify the 31.75 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 25.4 mm s1 dimension is the screw seating geometry inside the 23.9 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Catalogue ratings belong to YAR 207-104-2RF as the grub two rf execution; other order numbers of the YAR 207-104 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-207-104-2RF?", "a": "The catalogue envelope is 31.75x72x42.9 mm with a spherical outside surface; mass 510 g. Ratings C 25.5/15.3 kN, Pu 0.655 kN, limiting speed 3,200 r/min." }, { "q": "What does the designation YAR 207-104-2RF mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -104 = 31.75 mm, which is why this row sits beside, not on, the metric bore size. the -2RF external design combines contact nitrile seals with rubberized additional flingers on both sides for a tighter labyrinth than the plain-flinger -2F execution." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." }, { "q": "How is YAR-207-104-2RF lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." } ], "cross_ref": [ { "equiv_sku": "YAR-207-104-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 31.75x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-104-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 31.75x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YARAG-207-104", "equiv_brand": "SKF", "level": "full", "note": "Same 31.75x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 207-104 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-207-104-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 31.75x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-104-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-207-104-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 31.75x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-104-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-207-104-2RF", "YAR 207-104-2RF" ], "locale_variants": {} }, { "sku": "YAR-207-104-2RF-VE495", "brand": "SKF", "manufacturer_designation": "YAR 207-104-2RF/VE495", "series": "YAR2-series", "type": "insert", "d_mm": 31.75, "D_mm": 72, "B_mm": 42.9, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 3200, "max_rpm": 3200, "weight_g": 510, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 207-104-2RF/VE495 is a SKF insert bearing (Y-bearing) for a 31.75 mm (1.25 in) shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 72 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -104 decodes as 1\" +4/16, i.e. 31.75 mm; the metric coded size YAR 207 shares the same envelope but its bore is the metric value, not this one. the VE495 suffix packages zinc-coated rings with stainless-reinforced food-grade seals/flingers and food-grade lubricant — the wash-down-resistant counterpart of the standard -2RF bearing. Envelope 31.75x72x42.9 mm (1.25x2.835x1.689 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,200 r/min; mass 510 g. Pitch-diameter arithmetic: dm = (31.75+72)/2 = 51.875 mm; at the 3,200 r/min limiting speed the ball set runs at dn approx 1.66x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Capacity density: 25.5 kN from 0.510 kg of bearing steel is about 50 kN per kilogram, and per width millimetre the 42.9 mm unit carries 0.594 kN of dynamic capacity. Spherical-seat note in numbers: the 72 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 51.875 = 162.97 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Fatigue-limit check: Pu 0.655 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YAR 207-104-2RF/VE495 — most belt-driven mounted-unit loads sit comfortably under 2.569 % of C. Mass-to-load ratio for YAR-207-104-2RF-VE495: 20 g of catalogue mass per rated kN of C, and 16.063 g per millimetre of bore — useful when comparing executions of the same 31.75x72 mm envelope on the drawing. Zinc-coated food-range note: the VE495 plating is a functional surface, not cosmetic; clean the bore and shaft WITHOUT steel brushes or aggressive descalers, mount dry or with the approved food-grade mounting paste, and touch up damaged plating spots before commissioning the wash-down area. Set-screw geometry on this size: the two 120 deg screws bear on the 31.75 mm shaft inside the 42.9 mm total width while the outer ring is only 19 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "ventilation and extraction fans", "trough conveyor idler drives", "small packaging and labelling machines" ], "failure_modes": [ "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "The 25.4 mm s1 dimension is the screw seating geometry inside the 23.9 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 31.75 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 25.5/15.3 kN figures belong specifically to YAR 207-104-2RF/VE495; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-207-104-2RF-VE495?", "a": "Boundary dimensions: bore 31.75 mm, sphered OD 72 mm, overall width 42.9 mm; weight 510 g. Loads: dynamic 25.5 kN, static 15.3 kN, fatigue 0.655 kN; the only published speed is the 3,200 r/min limiting value." }, { "q": "What does the designation YAR 207-104-2RF/VE495 mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -104 decodes as 1\" +4/16, i.e. 31.75 mm; the metric coded size YAR 207 shares the same envelope but its bore is the metric value, not this one. the VE495 suffix packages zinc-coated rings with stainless-reinforced food-grade seals/flingers and food-grade lubricant — the wash-down-resistant counterpart of the standard -2RF bearing." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." }, { "q": "How is YAR-207-104-2RF-VE495 lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." } ], "cross_ref": [ { "equiv_sku": "YAR-207-104-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 31.75x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-104-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 31.75x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YARAG-207-104", "equiv_brand": "SKF", "level": "full", "note": "Same 31.75x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 207-104 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-207-104-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 31.75x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-104-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-207-104-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 31.75x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-104-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-207-104-2RF-VE495", "YAR 207-104-2RF/VE495" ], "locale_variants": {} }, { "sku": "YAR-207-104-2F", "brand": "SKF", "manufacturer_designation": "YAR 207-104-2F", "series": "YAR2-series", "type": "insert", "d_mm": 31.75, "D_mm": 72, "B_mm": 42.9, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 5300, "max_rpm": 5300, "weight_g": 500, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YAR 207-104-2F is SKF's 31.75 mm-bore grub-screw insert bearing with the inner ring extended on both sides in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 31.75x72x42.9 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -104 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 4/16 in = 31.75 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 31.75x72x42.9 mm (1.25x2.835x1.689 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. The catalogue publishes a single speed ceiling, the limiting speed: 5,300 r/min; mass 500 g. Width accounting on this execution: 42.9 mm overall and 19 mm outer-ring width leave the housing designer 23.9 mm of inner-ring projection to accommodate the locking arrangement. At the printed limiting speed of 5,300 r/min the mean diameter dm = 51.875 mm implies dn about 2.75x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Imperial procurement cross-check: 1.25 in bore, 2.835 in OD, 1.689 in overall width; the 500 g mass converts to 0.500 kg (17.6 oz) for the bill of materials. Rating split for the maintenance file: dynamic 25.5 kN (L10), static 15.3 kN (s0 shock check), fatigue 0.655 kN (adjusted life) — three separate uses for YAR 207-104-2F, none interchangeable with another. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 31.75x72 mm insert on its chamfer tilts the whole spherical seat. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Set-screw geometry on this size: the two 120 deg screws bear on the 31.75 mm shaft inside the 42.9 mm total width while the outer ring is only 19 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "trough conveyor idler drives", "head- and tail-shaft pillow blocks in unit handling", "ventilation and extraction fans" ], "failure_modes": [ "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 25.4 mm s1 dimension is the screw seating geometry inside the 23.9 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 31.75 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Ordering discipline for the 31.75 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-207-104-2F?", "a": "YAR 207-104-2F measures 31.75 mm bore x 72 mm OD x 42.9 mm overall width (outer ring 19 mm wide), 1.25 x 2.835 x 1.689 in; mass about 500 g. SKF 17000 ratings: C 25.5 kN, C0 15.3 kN, Pu 0.655 kN, limiting speed 5,300 r/min." }, { "q": "What does the designation YAR 207-104-2F mean?", "a": "the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -104 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 4/16 in = 31.75 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "How is YAR-207-104-2F lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." }, { "q": "How do the set screws lock the 31.75 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." } ], "cross_ref": [ { "equiv_sku": "YAR-207-104-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 31.75x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-104-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 31.75x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YARAG-207-104", "equiv_brand": "SKF", "level": "full", "note": "Same 31.75x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 207-104 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-207-104-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 31.75x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-104-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-207-104-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 31.75x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-104-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-207-104-2F", "YAR 207-104-2F" ], "locale_variants": {} }, { "sku": "YAR-207-105-2F", "brand": "SKF", "manufacturer_designation": "YAR 207-105-2F", "series": "YAR2-series", "type": "insert", "d_mm": 33.3375, "D_mm": 72, "B_mm": 42.9, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 5300, "max_rpm": 5300, "weight_g": 480, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YAR 207-105-2F is SKF's 33.3375 mm-bore grub-screw insert bearing with the inner ring extended on both sides in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 33.3375x72x42.9 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -105 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 5/16 in = 33.337 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 33.3375x72x42.9 mm (1.313x2.835x1.689 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. The catalogue publishes a single speed ceiling, the limiting speed: 5,300 r/min; mass 480 g. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 46.1 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the plain flinger. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 33.3375x72 mm insert on its chamfer tilts the whole spherical seat. Load balance for documentation: C0 15.3 kN against C 25.5 kN gives a 0.6 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Pitch-diameter arithmetic: dm = (33.3375+72)/2 = 52.669 mm; at the 5,300 r/min limiting speed the ball set runs at dn approx 2.79x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Width accounting on this execution: 42.9 mm overall and 19 mm outer-ring width leave the housing designer 23.9 mm of inner-ring projection to accommodate the locking arrangement. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Service tip for YAR-207-105-2F: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 19.331 mm radial section.", "applications": [ "head- and tail-shaft pillow blocks in unit handling", "small packaging and labelling machines", "garden and groundcare equipment" ], "failure_modes": [ "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "Do not specify the 33.3375 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 25.4 mm s1 dimension is the screw seating geometry inside the 23.9 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Catalogue ratings belong to YAR 207-105-2F as the grub two f execution; other order numbers of the YAR 207-105 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-207-105-2F?", "a": "YAR 207-105-2F measures 33.3375 mm bore x 72 mm OD x 42.9 mm overall width (outer ring 19 mm wide), 1.313 x 2.835 x 1.689 in; mass about 480 g. SKF 17000 ratings: C 25.5 kN, C0 15.3 kN, Pu 0.655 kN, limiting speed 5,300 r/min." }, { "q": "What does the designation YAR 207-105-2F mean?", "a": "the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -105 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 5/16 in = 33.337 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "How is YAR-207-105-2F lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." }, { "q": "How do the set screws lock the 33.3375 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." } ], "cross_ref": [ { "equiv_sku": "YAR", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-207-105-2F", "YAR 207-105-2F" ], "locale_variants": {} }, { "sku": "YAR-207-106-2RF-HV", "brand": "SKF", "manufacturer_designation": "YAR 207-106-2RF/HV", "series": "YAR2-series", "type": "insert", "d_mm": 34.925, "D_mm": 72, "B_mm": 42.9, "material": "SS440C", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 21.6, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 3200, "max_rpm": 3200, "weight_g": 450, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 207-106-2RF/HV is a SKF insert bearing (Y-bearing) for a 34.925 mm (1.375 in) shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 72 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -106 decodes as 1\" +6/16, i.e. 34.925 mm; the metric coded size YAR 207 shares the same envelope but its bore is the metric value, not this one. the HV suffix means stainless rings and balls with food-grade compliant seals and grease; capacity is derated versus the carbon-steel part. Envelope 34.925x72x42.9 mm (1.375x2.835x1.689 in), outer ring 19 mm wide, C 21.6 kN, C0 15.3 kN, Pu 0.655 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,200 r/min; mass 450 g. Static-first planning: the 0.357 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 34.925 mm shaft, not the 21.6 kN L10 value. Pitch-diameter arithmetic: dm = (34.925+72)/2 = 53.462 mm; at the 3,200 r/min limiting speed the ball set runs at dn approx 1.71x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 46.1 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the inner flinger. Grease-life arithmetic is dominated by speed: at dn approx 1.71x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Bore-to-OD planning: OD 72 over bore 34.925 is a 2.062x step, while bore/overall-width gives 0.814; the spherical seat in the matching Y-housing must be specified to the 72 mm OD, not to a cylindrical housing bore. Stainless food-range note: HV parts trade some capacity for corrosion resistance and food-compatible lubrication, and the printed limiting speed is set for that fill; do not top up with ordinary mineral grease in service — mixing greases can harden the food-grade fill and seize the seals. Set-screw geometry on this size: the two 120 deg screws bear on the 34.925 mm shaft inside the 42.9 mm total width while the outer ring is only 19 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "ventilation and extraction fans", "trough conveyor idler drives", "head- and tail-shaft pillow blocks in unit handling" ], "failure_modes": [ "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "The 25.4 mm s1 dimension is the screw seating geometry inside the 23.9 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 34.925 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 21.6/15.3 kN figures belong specifically to YAR 207-106-2RF/HV; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-207-106-2RF-HV?", "a": "Boundary dimensions: bore 34.925 mm, sphered OD 72 mm, overall width 42.9 mm; weight 450 g. Loads: dynamic 21.6 kN, static 15.3 kN, fatigue 0.655 kN; the only published speed is the 3,200 r/min limiting value." }, { "q": "What does the designation YAR 207-106-2RF/HV mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -106 decodes as 1\" +6/16, i.e. 34.925 mm; the metric coded size YAR 207 shares the same envelope but its bore is the metric value, not this one. the HV suffix means stainless rings and balls with food-grade compliant seals and grease; capacity is derated versus the carbon-steel part." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." }, { "q": "How is YAR-207-106-2RF-HV lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." } ], "cross_ref": [ { "equiv_sku": "YAR-207-2RF-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-2RF/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-2RFGR-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-2RFGR/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YARAG-207", "equiv_brand": "SKF", "level": "partial", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-2RF", "equiv_brand": "SKF", "level": "partial", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-106-2RFGR-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-106-2RFGR/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YARAG-207-106", "equiv_brand": "SKF", "level": "partial", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-106-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-106-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-207-106-2RF-HV", "YAR 207-106-2RF/HV" ], "locale_variants": {} }, { "sku": "YAR-207-106-2RFGR-HV", "brand": "SKF", "manufacturer_designation": "YAR 207-106-2RFGR/HV", "series": "YAR2-series", "type": "insert", "d_mm": 34.925, "D_mm": 72, "B_mm": 42.9, "material": "SS440C", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 21.6, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 3200, "max_rpm": 3200, "weight_g": 450, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YAR 207-106-2RFGR/HV is SKF's 34.925 mm-bore grub-screw insert bearing with the inner ring extended on both sides in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 34.925x72x42.9 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -106 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 6/16 in = 34.925 mm (first digit whole inches, next two sixteenths of an inch). /HV identifies the stainless-steel, food-industry execution: stainless bearing components, food-compatible rubber in the seal/flinger set and food-grade grease fill — the catalogue ratings are correspondingly below the standard steel version, and the GR marking adds the lubrication groove in the sphered outside surface on the locking side. Envelope 34.925x72x42.9 mm (1.375x2.835x1.689 in), outer ring 19 mm wide, C 21.6 kN, C0 15.3 kN, Pu 0.655 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,200 r/min; mass 450 g. Outer-vs-overall width: the outer ring is 19 mm wide inside the 42.9 mm total, so the extended inner ring accounts for 0.557 of the overall width (11.95 mm of axial projection per side). Rating split for the maintenance file: dynamic 21.6 kN (L10), static 15.3 kN (s0 shock check), fatigue 0.655 kN (adjusted life) — three separate uses for YAR 207-106-2RFGR/HV, none interchangeable with another. Selection figures for YAR 207-106-2RFGR/HV: C0/C is 0.708, Pu 0.655 kN is 3.032 % of the 21.6 kN dynamic rating, and the 450 g catalogue mass works out to roughly 12.885 g per millimetre of the 34.925 mm bore. Static-first planning: the 0.357 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 34.925 mm shaft, not the 21.6 kN L10 value. At the printed limiting speed of 3,200 r/min the mean diameter dm = 53.462 mm implies dn about 1.71x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Stainless food-range note: HV parts trade some capacity for corrosion resistance and food-compatible lubrication, and the printed limiting speed is set for that fill; do not top up with ordinary mineral grease in service — mixing greases can harden the food-grade fill and seize the seals. Set-screw geometry on this size: the two 120 deg screws bear on the 34.925 mm shaft inside the 42.9 mm total width while the outer ring is only 19 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "small packaging and labelling machines", "ventilation and extraction fans", "garden and groundcare equipment" ], "failure_modes": [ "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "Do not specify the 34.925 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 25.4 mm s1 dimension is the screw seating geometry inside the 23.9 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Catalogue ratings belong to YAR 207-106-2RFGR/HV as the grub two hv execution; other order numbers of the YAR 207-106 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-207-106-2RFGR-HV?", "a": "YAR 207-106-2RFGR/HV measures 34.925 mm bore x 72 mm OD x 42.9 mm overall width (outer ring 19 mm wide), 1.375 x 2.835 x 1.689 in; mass about 450 g. SKF 17000 ratings: C 21.6 kN, C0 15.3 kN, Pu 0.655 kN, limiting speed 3,200 r/min." }, { "q": "What does the designation YAR 207-106-2RFGR/HV mean?", "a": "the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -106 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 6/16 in = 34.925 mm (first digit whole inches, next two sixteenths of an inch). /HV identifies the stainless-steel, food-industry execution: stainless bearing components, food-compatible rubber in the seal/flinger set and food-grade grease fill — the catalogue ratings are correspondingly below the standard steel version, and the GR marking adds the lubrication groove in the sphered outside surface on the locking side." }, { "q": "How do the set screws lock the 34.925 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." } ], "cross_ref": [ { "equiv_sku": "YAR-207-2RF-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-2RF/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-2RFGR-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-2RFGR/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YARAG-207", "equiv_brand": "SKF", "level": "partial", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-2RF", "equiv_brand": "SKF", "level": "partial", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-106-2RF-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-106-2RF/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YARAG-207-106", "equiv_brand": "SKF", "level": "partial", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-106-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-106-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-207-106-2RFGR-HV", "YAR 207-106-2RFGR/HV" ], "locale_variants": {} }, { "sku": "YARAG-207-106", "brand": "SKF", "manufacturer_designation": "YARAG 207-106", "series": "YAR2-series", "type": "insert", "d_mm": 34.925, "D_mm": 72, "B_mm": 42.9, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 1100, "max_rpm": 1100, "weight_g": 440, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YARAG 207-106 is a SKF insert bearing (Y-bearing) for a 34.925 mm (1.375 in) shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 72 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -106 decodes as 1\" +6/16, i.e. 34.925 mm; the metric coded size YARAG 207 shares the same envelope but its bore is the metric value, not this one. the AG suffix identifies the farm-duty variant of the range: sealed and flinger-protected for chaff and dust, with the catalogue deliberately derating its permissible speed versus the industrial execution. Envelope 34.925x72x42.9 mm (1.375x2.835x1.689 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. The catalogue publishes a single speed ceiling, the limiting speed: 1,100 r/min; mass 440 g. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 34.925x72 mm insert on its chamfer tilts the whole spherical seat. Load balance for documentation: C0 15.3 kN against C 25.5 kN gives a 0.6 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Rating split for the maintenance file: dynamic 25.5 kN (L10), static 15.3 kN (s0 shock check), fatigue 0.655 kN (adjusted life) — three separate uses for YARAG 207-106, none interchangeable with another. Mass-to-load ratio for YARAG-207-106: 17.255 g of catalogue mass per rated kN of C, and 12.598 g per millimetre of bore — useful when comparing executions of the same 34.925x72 mm envelope on the drawing. Pitch-diameter arithmetic: dm = (34.925+72)/2 = 53.462 mm; at the 1,100 r/min limiting speed the ball set runs at dn approx 0.59x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Set-screw geometry on this size: the two 120 deg screws bear on the 34.925 mm shaft inside the 42.9 mm total width while the outer ring is only 19 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "head- and tail-shaft pillow blocks in unit handling", "garden and groundcare equipment", "ventilation and extraction fans" ], "failure_modes": [ "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 34.925 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 25.4 mm s1 dimension is the screw seating geometry inside the 23.9 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Ordering discipline for the 34.925 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YARAG-207-106?", "a": "Boundary dimensions: bore 34.925 mm, sphered OD 72 mm, overall width 42.9 mm; weight 440 g. Loads: dynamic 25.5 kN, static 15.3 kN, fatigue 0.655 kN; the only published speed is the 1,100 r/min limiting value." }, { "q": "What does the designation YARAG 207-106 mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -106 decodes as 1\" +6/16, i.e. 34.925 mm; the metric coded size YARAG 207 shares the same envelope but its bore is the metric value, not this one. the AG suffix identifies the farm-duty variant of the range: sealed and flinger-protected for chaff and dust, with the catalogue deliberately derating its permissible speed versus the industrial execution." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAR-207-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YARAG-207", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 207 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-106-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-106-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-106-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-106-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-207-106-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-106-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YARAG-207-106", "YARAG 207-106" ], "locale_variants": {} }, { "sku": "YAR-207-106-2RF-VE495", "brand": "SKF", "manufacturer_designation": "YAR 207-106-2RF/VE495", "series": "YAR2-series", "type": "insert", "d_mm": 34.925, "D_mm": 72, "B_mm": 42.9, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 3200, "max_rpm": 3200, "weight_g": 450, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 207-106-2RF/VE495 is a SKF insert bearing (Y-bearing) for a 34.925 mm (1.375 in) shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 72 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -106 decodes as 1\" +6/16, i.e. 34.925 mm; the metric coded size YAR 207 shares the same envelope but its bore is the metric value, not this one. the VE495 suffix packages zinc-coated rings with stainless-reinforced food-grade seals/flingers and food-grade lubricant — the wash-down-resistant counterpart of the standard -2RF bearing. Envelope 34.925x72x42.9 mm (1.375x2.835x1.689 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,200 r/min; mass 450 g. Bore-to-OD planning: OD 72 over bore 34.925 is a 2.062x step, while bore/overall-width gives 0.814; the spherical seat in the matching Y-housing must be specified to the 72 mm OD, not to a cylindrical housing bore. Imperial procurement cross-check: 1.375 in bore, 2.835 in OD, 1.689 in overall width; the 450 g mass converts to 0.450 kg (15.9 oz) for the bill of materials. At the printed limiting speed of 3,200 r/min the mean diameter dm = 53.462 mm implies dn about 1.71x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 34.925x72 mm insert on its chamfer tilts the whole spherical seat. Capacity density: 25.5 kN from 0.450 kg of bearing steel is about 56.667 kN per kilogram, and per width millimetre the 42.9 mm unit carries 0.594 kN of dynamic capacity. Zinc-coated food-range note: the VE495 plating is a functional surface, not cosmetic; clean the bore and shaft WITHOUT steel brushes or aggressive descalers, mount dry or with the approved food-grade mounting paste, and touch up damaged plating spots before commissioning the wash-down area. Set-screw geometry on this size: the two 120 deg screws bear on the 34.925 mm shaft inside the 42.9 mm total width while the outer ring is only 19 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "garden and groundcare equipment", "head- and tail-shaft pillow blocks in unit handling", "trough conveyor idler drives" ], "failure_modes": [ "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "Do not specify the 34.925 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 25.4 mm s1 dimension is the screw seating geometry inside the 23.9 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Catalogue ratings belong to YAR 207-106-2RF/VE495 as the grub two ve495 execution; other order numbers of the YAR 207-106 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-207-106-2RF-VE495?", "a": "Boundary dimensions: bore 34.925 mm, sphered OD 72 mm, overall width 42.9 mm; weight 450 g. Loads: dynamic 25.5 kN, static 15.3 kN, fatigue 0.655 kN; the only published speed is the 3,200 r/min limiting value." }, { "q": "What does the designation YAR 207-106-2RF/VE495 mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -106 decodes as 1\" +6/16, i.e. 34.925 mm; the metric coded size YAR 207 shares the same envelope but its bore is the metric value, not this one. the VE495 suffix packages zinc-coated rings with stainless-reinforced food-grade seals/flingers and food-grade lubricant — the wash-down-resistant counterpart of the standard -2RF bearing." }, { "q": "How is YAR-207-106-2RF-VE495 lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." }, { "q": "How do the set screws lock the 34.925 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." } ], "cross_ref": [ { "equiv_sku": "YAR-207-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YARAG-207", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 207 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-106-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-106-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YARAG-207-106", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 207-106 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-207-106-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-106-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-207-106-2RF-VE495", "YAR 207-106-2RF/VE495" ], "locale_variants": {} }, { "sku": "YAR-207-106-2F", "brand": "SKF", "manufacturer_designation": "YAR 207-106-2F", "series": "YAR2-series", "type": "insert", "d_mm": 34.925, "D_mm": 72, "B_mm": 42.9, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 5300, "max_rpm": 5300, "weight_g": 450, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YAR 207-106-2F is SKF's 34.925 mm-bore grub-screw insert bearing with the inner ring extended on both sides in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 34.925x72x42.9 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -106 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 6/16 in = 34.925 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 34.925x72x42.9 mm (1.375x2.835x1.689 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. The catalogue publishes a single speed ceiling, the limiting speed: 5,300 r/min; mass 450 g. Spherical-seat note in numbers: the 72 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 53.462 = 167.956 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Speed ceiling of 5,300 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Static-first planning: the 0.357 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 34.925 mm shaft, not the 25.5 kN L10 value. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 34.925x72 mm insert on its chamfer tilts the whole spherical seat. Grease-life arithmetic is dominated by speed: at dn approx 2.83x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Service tip for YAR-207-106-2F: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 18.538 mm radial section.", "applications": [ "trough conveyor idler drives", "head- and tail-shaft pillow blocks in unit handling", "small packaging and labelling machines" ], "failure_modes": [ "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "The 25.4 mm s1 dimension is the screw seating geometry inside the 23.9 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 34.925 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 25.5/15.3 kN figures belong specifically to YAR 207-106-2F; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-207-106-2F?", "a": "YAR 207-106-2F measures 34.925 mm bore x 72 mm OD x 42.9 mm overall width (outer ring 19 mm wide), 1.375 x 2.835 x 1.689 in; mass about 450 g. SKF 17000 ratings: C 25.5 kN, C0 15.3 kN, Pu 0.655 kN, limiting speed 5,300 r/min." }, { "q": "What does the designation YAR 207-106-2F mean?", "a": "the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -106 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 6/16 in = 34.925 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "How is YAR-207-106-2F lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." }, { "q": "How do the set screws lock the 34.925 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." } ], "cross_ref": [ { "equiv_sku": "YAR-207-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YARAG-207", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 207 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-207-106-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-106-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YARAG-207-106", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 207-106 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-207-106-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-106-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-207-106-2F", "YAR 207-106-2F" ], "locale_variants": {} }, { "sku": "YAT-207-107", "brand": "SKF", "manufacturer_designation": "YAT 207-107", "series": "YAR2-series", "type": "insert", "d_mm": 36.512499999999996, "D_mm": 72, "B_mm": 33, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 5300, "max_rpm": 5300, "weight_g": 360, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAT 207-107 is a SKF insert bearing (Y-bearing) for a 36.512499999999996 mm (1.438 in) shaft: grub-screw insert bearing with the inner ring extended on one side, built to the ISO 15 diameter-series envelope with a sphered OD of 72 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAT basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAT carries the one-side-extended inner ring. inch bore code -107 decodes as 1\" +7/16, i.e. 36.512 mm; the metric coded size YAT 207 shares the same envelope but its bore is the metric value, not this one. with no -2F/-2RF suffix the order number denotes the open external execution of the YAR2 size — add external exclusion at the housing and plan relubrication intervals for dusty or wet surroundings. Envelope 36.512499999999996x72x33 mm (1.438x2.835x1.299 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. The catalogue publishes a single speed ceiling, the limiting speed: 5,300 r/min; mass 360 g. Pitch-diameter arithmetic: dm = (36.512499999999996+72)/2 = 54.256 mm; at the 5,300 r/min limiting speed the ball set runs at dn approx 2.88x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Width accounting on this execution: 33 mm overall and 19 mm outer-ring width leave the housing designer 14 mm of inner-ring projection to accommodate the locking arrangement. Envelope arithmetic: the radial section from 36.512499999999996 mm bore to 72 mm OD is 17.744 mm; dividing C 25.5 kN by that section gives 1.437 kN per section millimetre, and the 33 mm overall width is 1.86x the section. Mass-to-load ratio for YAT-207-107: 14.118 g of catalogue mass per rated kN of C, and 9.86 g per millimetre of bore — useful when comparing executions of the same 36.512499999999996x72 mm envelope on the drawing. At the printed limiting speed of 5,300 r/min the mean diameter dm = 54.256 mm implies dn about 2.88x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Single-extension fitting note: with the inner ring extended only on the locking side, orient the open (non-extended) face toward the shaft step or housing shoulder as the drawing shows — reversed, the set screws end up unsupported by the abutment and the shortened side offers no seal land at all. Service tip for YAT-207-107: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 17.744 mm radial section.", "applications": [ "head- and tail-shaft pillow blocks in unit handling", "small packaging and labelling machines", "garden and groundcare equipment" ], "failure_modes": [ "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "The 23.3 mm s1 dimension is the screw seating geometry inside the 14 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a one-side YAT insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 36.512499999999996 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 25.5/15.3 kN figures belong specifically to YAT 207-107; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAT-207-107?", "a": "Boundary dimensions: bore 36.512499999999996 mm, sphered OD 72 mm, overall width 33 mm; weight 360 g. Loads: dynamic 25.5 kN, static 15.3 kN, fatigue 0.655 kN; the only published speed is the 5,300 r/min limiting value." }, { "q": "What does the designation YAT 207-107 mean?", "a": "reading the YAT basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAT carries the one-side-extended inner ring. inch bore code -107 decodes as 1\" +7/16, i.e. 36.512 mm; the metric coded size YAT 207 shares the same envelope but its bore is the metric value, not this one. with no -2F/-2RF suffix the order number denotes the open external execution of the YAR2 size — add external exclusion at the housing and plan relubrication intervals for dusty or wet surroundings." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." } ], "cross_ref": [ { "equiv_sku": "YAT", "equiv_brand": "ISO 15", "level": "full", "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAT-207-107", "YAT 207-107" ], "locale_variants": {} }, { "sku": "YAR-207-107-2RF-HV", "brand": "SKF", "manufacturer_designation": "YAR 207-107-2RF/HV", "series": "YAR2-series", "type": "insert", "d_mm": 36.512499999999996, "D_mm": 72, "B_mm": 42.9, "material": "SS440C", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 21.6, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 3200, "max_rpm": 3200, "weight_g": 420, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 207-107-2RF/HV is a SKF insert bearing (Y-bearing) for a 36.512499999999996 mm (1.438 in) shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 72 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -107 decodes as 1\" +7/16, i.e. 36.512 mm; the metric coded size YAR 207 shares the same envelope but its bore is the metric value, not this one. the HV suffix means stainless rings and balls with food-grade compliant seals and grease; capacity is derated versus the carbon-steel part. Envelope 36.512499999999996x72x42.9 mm (1.438x2.835x1.689 in), outer ring 19 mm wide, C 21.6 kN, C0 15.3 kN, Pu 0.655 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,200 r/min; mass 420 g. Selection figures for YAR 207-107-2RF/HV: C0/C is 0.708, Pu 0.655 kN is 3.032 % of the 21.6 kN dynamic rating, and the 420 g catalogue mass works out to roughly 11.503 g per millimetre of the 36.512499999999996 mm bore. Outer-vs-overall width: the outer ring is 19 mm wide inside the 42.9 mm total, so the extended inner ring accounts for 0.557 of the overall width (11.95 mm of axial projection per side). Rating split for the maintenance file: dynamic 21.6 kN (L10), static 15.3 kN (s0 shock check), fatigue 0.655 kN (adjusted life) — three separate uses for YAR 207-107-2RF/HV, none interchangeable with another. Load balance for documentation: C0 15.3 kN against C 21.6 kN gives a 0.708 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Speed ceiling of 3,200 r/min is the catalogue mechanical limit for THIS execution; the stainless/food-grade HV fill sets this lower value, so real fan duty is planned well below it. Stainless food-range note: HV parts trade some capacity for corrosion resistance and food-compatible lubrication, and the printed limiting speed is set for that fill; do not top up with ordinary mineral grease in service — mixing greases can harden the food-grade fill and seize the seals. Set-screw geometry on this size: the two 120 deg screws bear on the 36.512499999999996 mm shaft inside the 42.9 mm total width while the outer ring is only 19 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "head- and tail-shaft pillow blocks in unit handling", "garden and groundcare equipment", "trough conveyor idler drives" ], "failure_modes": [ "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 25.4 mm s1 dimension is the screw seating geometry inside the 23.9 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 36.512499999999996 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Ordering discipline for the 36.512499999999996 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-207-107-2RF-HV?", "a": "Boundary dimensions: bore 36.512499999999996 mm, sphered OD 72 mm, overall width 42.9 mm; weight 420 g. Loads: dynamic 21.6 kN, static 15.3 kN, fatigue 0.655 kN; the only published speed is the 3,200 r/min limiting value." }, { "q": "What does the designation YAR 207-107-2RF/HV mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -107 decodes as 1\" +7/16, i.e. 36.512 mm; the metric coded size YAR 207 shares the same envelope but its bore is the metric value, not this one. the HV suffix means stainless rings and balls with food-grade compliant seals and grease; capacity is derated versus the carbon-steel part." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAR-207-107-2RFGR-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 36.512499999999996x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-107-2RFGR/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YARAG-207-107", "equiv_brand": "SKF", "level": "partial", "note": "Same 36.512499999999996x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-107-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 36.512499999999996x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-107-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 36.512499999999996x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-207-107-2RF-HV", "YAR 207-107-2RF/HV" ], "locale_variants": {} }, { "sku": "YAR-207-107-2RFGR-HV", "brand": "SKF", "manufacturer_designation": "YAR 207-107-2RFGR/HV", "series": "YAR2-series", "type": "insert", "d_mm": 36.512499999999996, "D_mm": 72, "B_mm": 42.9, "material": "SS440C", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 21.6, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 3200, "max_rpm": 3200, "weight_g": 420, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAR 207-107-2RFGR/HV is a grub-screw insert bearing with the inner ring extended on both sides, 36.512499999999996x72x42.9 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -107 = 36.512 mm, which is why this row sits beside, not on, the metric bore size. HV is the corrosion-resistant food-range variant of the -2RF sealed design — stainless parts plus food-compatible rubber and lubricant, which also explains its lower published C and limiting speed. Envelope 36.512499999999996x72x42.9 mm (1.438x2.835x1.689 in), outer ring 19 mm wide, C 21.6 kN, C0 15.3 kN, Pu 0.655 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,200 r/min; mass 420 g. Pitch-diameter arithmetic: dm = (36.512499999999996+72)/2 = 54.256 mm; at the 3,200 r/min limiting speed the ball set runs at dn approx 1.74x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Spherical-seat note in numbers: the 72 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 54.256 = 170.45 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Fatigue-limit check: Pu 0.655 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YAR 207-107-2RFGR/HV — most belt-driven mounted-unit loads sit comfortably under 3.032 % of C. Bore-to-OD planning: OD 72 over bore 36.512499999999996 is a 1.972x step, while bore/overall-width gives 0.851; the spherical seat in the matching Y-housing must be specified to the 72 mm OD, not to a cylindrical housing bore. Speed ceiling of 3,200 r/min is the catalogue mechanical limit for THIS execution; the stainless/food-grade HV fill sets this lower value, so real fan duty is planned well below it. Stainless food-range note: HV parts trade some capacity for corrosion resistance and food-compatible lubrication, and the printed limiting speed is set for that fill; do not top up with ordinary mineral grease in service — mixing greases can harden the food-grade fill and seize the seals. Set-screw geometry on this size: the two 120 deg screws bear on the 36.512499999999996 mm shaft inside the 42.9 mm total width while the outer ring is only 19 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "garden and groundcare equipment", "trough conveyor idler drives", "small packaging and labelling machines" ], "failure_modes": [ "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "The 25.4 mm s1 dimension is the screw seating geometry inside the 23.9 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 36.512499999999996 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 21.6/15.3 kN figures belong specifically to YAR 207-107-2RFGR/HV; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-207-107-2RFGR-HV?", "a": "The catalogue envelope is 36.512499999999996x72x42.9 mm with a spherical outside surface; mass 420 g. Ratings C 21.6/15.3 kN, Pu 0.655 kN, limiting speed 3,200 r/min." }, { "q": "What does the designation YAR 207-107-2RFGR/HV mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -107 = 36.512 mm, which is why this row sits beside, not on, the metric bore size. HV is the corrosion-resistant food-range variant of the -2RF sealed design — stainless parts plus food-compatible rubber and lubricant, which also explains its lower published C and limiting speed." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." }, { "q": "How is YAR-207-107-2RFGR-HV lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." } ], "cross_ref": [ { "equiv_sku": "YAR-207-107-2RF-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 36.512499999999996x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-107-2RF/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YARAG-207-107", "equiv_brand": "SKF", "level": "partial", "note": "Same 36.512499999999996x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-107-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 36.512499999999996x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-107-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 36.512499999999996x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (21.6/15.3 kN vs 25.5/15.3 kN) — envelope match, not a load-rating equivalent." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-207-107-2RFGR-HV", "YAR 207-107-2RFGR/HV" ], "locale_variants": {} }, { "sku": "YARAG-207-107", "brand": "SKF", "manufacturer_designation": "YARAG 207-107", "series": "YAR2-series", "type": "insert", "d_mm": 36.512499999999996, "D_mm": 72, "B_mm": 42.9, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 1100, "max_rpm": 1100, "weight_g": 410, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YARAG 207-107 is a grub-screw insert bearing with the inner ring extended on both sides, 36.512499999999996x72x42.9 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -107 = 36.512 mm, which is why this row sits beside, not on, the metric bore size. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery. Envelope 36.512499999999996x72x42.9 mm (1.438x2.835x1.689 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. The catalogue publishes a single speed ceiling, the limiting speed: 1,100 r/min; mass 410 g. Selection figures for YARAG 207-107: C0/C is 0.6, Pu 0.655 kN is 2.569 % of the 25.5 kN dynamic rating, and the 410 g catalogue mass works out to roughly 11.229 g per millimetre of the 36.512499999999996 mm bore. Outer-vs-overall width: the outer ring is 19 mm wide inside the 42.9 mm total, so the extended inner ring accounts for 0.557 of the overall width (11.95 mm of axial projection per side). At the printed limiting speed of 1,100 r/min the mean diameter dm = 54.256 mm implies dn about 0.60x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Spherical-seat note in numbers: the 72 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 54.256 = 170.45 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. The s1 25.4 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Set-screw geometry on this size: the two 120 deg screws bear on the 36.512499999999996 mm shaft inside the 42.9 mm total width while the outer ring is only 19 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "ventilation and extraction fans", "garden and groundcare equipment", "trough conveyor idler drives" ], "failure_modes": [ "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "Do not specify the 36.512499999999996 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 25.4 mm s1 dimension is the screw seating geometry inside the 23.9 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Catalogue ratings belong to YARAG 207-107 as the grub two ag execution; other order numbers of the YARAG 207-107 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YARAG-207-107?", "a": "The catalogue envelope is 36.512499999999996x72x42.9 mm with a spherical outside surface; mass 410 g. Ratings C 25.5/15.3 kN, Pu 0.655 kN, limiting speed 1,100 r/min." }, { "q": "What does the designation YARAG 207-107 mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -107 = 36.512 mm, which is why this row sits beside, not on, the metric bore size. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAR-207-107-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 36.512499999999996x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-107-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 36.512499999999996x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-107-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 36.512499999999996x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-107-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-207-107-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 36.512499999999996x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-107-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YARAG-207-107", "YARAG 207-107" ], "locale_variants": {} }, { "sku": "YAR-207-107-2RF-VE495", "brand": "SKF", "manufacturer_designation": "YAR 207-107-2RF/VE495", "series": "YAR2-series", "type": "insert", "d_mm": 36.512499999999996, "D_mm": 72, "B_mm": 42.9, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 3200, "max_rpm": 3200, "weight_g": 420, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAR 207-107-2RF/VE495 is a grub-screw insert bearing with the inner ring extended on both sides, 36.512499999999996x72x42.9 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -107 = 36.512 mm, which is why this row sits beside, not on, the metric bore size. VE495 denotes galvanized rings plus food-compatible sealing components and grease, aimed at humid, cleaned-down installations rather than submerged chemical duty. Envelope 36.512499999999996x72x42.9 mm (1.438x2.835x1.689 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,200 r/min; mass 420 g. Bore-to-OD planning: OD 72 over bore 36.512499999999996 is a 1.972x step, while bore/overall-width gives 0.851; the spherical seat in the matching Y-housing must be specified to the 72 mm OD, not to a cylindrical housing bore. Grease-life arithmetic is dominated by speed: at dn approx 1.74x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Spherical-seat note in numbers: the 72 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 54.256 = 170.45 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Capacity density: 25.5 kN from 0.420 kg of bearing steel is about 60.714 kN per kilogram, and per width millimetre the 42.9 mm unit carries 0.594 kN of dynamic capacity. Static-first planning: the 0.357 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 36.512499999999996 mm shaft, not the 25.5 kN L10 value. Zinc-coated food-range note: the VE495 plating is a functional surface, not cosmetic; clean the bore and shaft WITHOUT steel brushes or aggressive descalers, mount dry or with the approved food-grade mounting paste, and touch up damaged plating spots before commissioning the wash-down area. Service tip for YAR-207-107-2RF-VE495: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 17.744 mm radial section.", "applications": [ "garden and groundcare equipment", "trough conveyor idler drives", "ventilation and extraction fans" ], "failure_modes": [ "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "Do not specify the 36.512499999999996 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 25.4 mm s1 dimension is the screw seating geometry inside the 23.9 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Catalogue ratings belong to YAR 207-107-2RF/VE495 as the grub two ve495 execution; other order numbers of the YAR 207-107 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-207-107-2RF-VE495?", "a": "The catalogue envelope is 36.512499999999996x72x42.9 mm with a spherical outside surface; mass 420 g. Ratings C 25.5/15.3 kN, Pu 0.655 kN, limiting speed 3,200 r/min." }, { "q": "What does the designation YAR 207-107-2RF/VE495 mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -107 = 36.512 mm, which is why this row sits beside, not on, the metric bore size. VE495 denotes galvanized rings plus food-compatible sealing components and grease, aimed at humid, cleaned-down installations rather than submerged chemical duty." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAR-207-107-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 36.512499999999996x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-107-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 36.512499999999996x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YARAG-207-107", "equiv_brand": "SKF", "level": "full", "note": "Same 36.512499999999996x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 207-107 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-207-107-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 36.512499999999996x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-107-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-207-107-2RF-VE495", "YAR 207-107-2RF/VE495" ], "locale_variants": {} }, { "sku": "YAR-207-107-2F", "brand": "SKF", "manufacturer_designation": "YAR 207-107-2F", "series": "YAR2-series", "type": "insert", "d_mm": 36.512499999999996, "D_mm": 72, "B_mm": 42.9, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 5300, "max_rpm": 5300, "weight_g": 420, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YAR 207-107-2F is SKF's 36.512499999999996 mm-bore grub-screw insert bearing with the inner ring extended on both sides in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 36.512499999999996x72x42.9 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -107 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 7/16 in = 36.512 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 36.512499999999996x72x42.9 mm (1.438x2.835x1.689 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. The catalogue publishes a single speed ceiling, the limiting speed: 5,300 r/min; mass 420 g. Width accounting on this execution: 42.9 mm overall and 19 mm outer-ring width leave the housing designer 23.9 mm of inner-ring projection to accommodate the locking arrangement. Spherical-seat note in numbers: the 72 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 54.256 = 170.45 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Imperial procurement cross-check: 1.438 in bore, 2.835 in OD, 1.689 in overall width; the 420 g mass converts to 0.420 kg (14.8 oz) for the bill of materials. Load balance for documentation: C0 15.3 kN against C 25.5 kN gives a 0.6 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. The s1 25.4 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Service tip for YAR-207-107-2F: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 17.744 mm radial section.", "applications": [ "head- and tail-shaft pillow blocks in unit handling", "trough conveyor idler drives", "garden and groundcare equipment" ], "failure_modes": [ "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 36.512499999999996 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 25.4 mm s1 dimension is the screw seating geometry inside the 23.9 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Ordering discipline for the 36.512499999999996 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-207-107-2F?", "a": "YAR 207-107-2F measures 36.512499999999996 mm bore x 72 mm OD x 42.9 mm overall width (outer ring 19 mm wide), 1.438 x 2.835 x 1.689 in; mass about 420 g. SKF 17000 ratings: C 25.5 kN, C0 15.3 kN, Pu 0.655 kN, limiting speed 5,300 r/min." }, { "q": "What does the designation YAR 207-107-2F mean?", "a": "the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -107 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 7/16 in = 36.512 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." }, { "q": "How is YAR-207-107-2F lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." } ], "cross_ref": [ { "equiv_sku": "YAR-207-107-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 36.512499999999996x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-207-107-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 36.512499999999996x72x42.9 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (25.5/15.3 kN vs 21.6/15.3 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YARAG-207-107", "equiv_brand": "SKF", "level": "full", "note": "Same 36.512499999999996x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 207-107 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-207-107-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 36.512499999999996x72x42.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 207-107-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-207-107-2F", "YAR 207-107-2F" ], "locale_variants": {} }, { "sku": "YAR-208-107-2F", "brand": "SKF", "manufacturer_designation": "YAR 208-107-2F", "series": "YAR2-series", "type": "insert", "d_mm": 36.512499999999996, "D_mm": 80, "B_mm": 49.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 30.7, "static_load_kN": 19, "fatigue_load_limit_kN": 0.8, "limiting_speed_rpm": 4800, "max_rpm": 4800, "weight_g": 680, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAR 208-107-2F is a grub-screw insert bearing with the inner ring extended on both sides, 36.512499999999996x80x49.2 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -107 = 36.512 mm, which is why this row sits beside, not on, the metric bore size. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution. Envelope 36.512499999999996x80x49.2 mm (1.438x3.15x1.937 in), outer ring 21 mm wide, C 30.7 kN, C0 19 kN, Pu 0.8 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,800 r/min; mass 680 g. Bore-to-OD planning: OD 80 over bore 36.512499999999996 is a 2.191x step, while bore/overall-width gives 0.742; the spherical seat in the matching Y-housing must be specified to the 80 mm OD, not to a cylindrical housing bore. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 51.8 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the plain flinger. Spherical-seat note in numbers: the 80 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 58.256 = 183.017 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Pitch-diameter arithmetic: dm = (36.512499999999996+80)/2 = 58.256 mm; at the 4,800 r/min limiting speed the ball set runs at dn approx 2.80x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Selection figures for YAR 208-107-2F: C0/C is 0.619, Pu 0.8 kN is 2.606 % of the 30.7 kN dynamic rating, and the 680 g catalogue mass works out to roughly 18.624 g per millimetre of the 36.512499999999996 mm bore. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Service tip for YAR-208-107-2F: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 21.744 mm radial section.", "applications": [ "ventilation and extraction fans", "trough conveyor idler drives", "small packaging and labelling machines" ], "failure_modes": [ "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "Do not specify the 36.512499999999996 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 30.2 mm s1 dimension is the screw seating geometry inside the 28.2 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Catalogue ratings belong to YAR 208-107-2F as the grub two f execution; other order numbers of the YAR 208-107 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-208-107-2F?", "a": "The catalogue envelope is 36.512499999999996x80x49.2 mm with a spherical outside surface; mass 680 g. Ratings C 30.7/19 kN, Pu 0.8 kN, limiting speed 4,800 r/min." }, { "q": "What does the designation YAR 208-107-2F mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -107 = 36.512 mm, which is why this row sits beside, not on, the metric bore size. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." }, { "q": "How is YAR-208-107-2F lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." } ], "cross_ref": [ { "equiv_sku": "YAR", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-208-107-2F", "YAR 208-107-2F" ], "locale_variants": {} }, { "sku": "YAT-208-108", "brand": "SKF", "manufacturer_designation": "YAT 208-108", "series": "YAR2-series", "type": "insert", "d_mm": 38.099999999999994, "D_mm": 80, "B_mm": 36, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 30.7, "static_load_kN": 19, "fatigue_load_limit_kN": 0.8, "limiting_speed_rpm": 4800, "max_rpm": 4800, "weight_g": 530, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAT 208-108 is a SKF insert bearing (Y-bearing) for a 38.099999999999994 mm (1.5 in) shaft: grub-screw insert bearing with the inner ring extended on one side, built to the ISO 15 diameter-series envelope with a sphered OD of 80 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAT basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAT carries the one-side-extended inner ring. inch bore code -108 decodes as 1\" +8/16, i.e. 38.1 mm; the metric coded size YAT 208 shares the same envelope but its bore is the metric value, not this one. with no -2F/-2RF suffix the order number denotes the open external execution of the YAR2 size — add external exclusion at the housing and plan relubrication intervals for dusty or wet surroundings. Envelope 38.099999999999994x80x36 mm (1.5x3.15x1.417 in), outer ring 21 mm wide, C 30.7 kN, C0 19 kN, Pu 0.8 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,800 r/min; mass 530 g. Grease-life arithmetic is dominated by speed: at dn approx 2.83x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Width accounting on this execution: 36 mm overall and 21 mm outer-ring width leave the housing designer 15 mm of inner-ring projection to accommodate the locking arrangement. Load balance for documentation: C0 19 kN against C 30.7 kN gives a 0.619 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Rating split for the maintenance file: dynamic 30.7 kN (L10), static 19 kN (s0 shock check), fatigue 0.8 kN (adjusted life) — three separate uses for YAT 208-108, none interchangeable with another. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 38.099999999999994x80 mm insert on its chamfer tilts the whole spherical seat. Single-extension fitting note: with the inner ring extended only on the locking side, orient the open (non-extended) face toward the shaft step or housing shoulder as the drawing shows — reversed, the set screws end up unsupported by the abutment and the shortened side offers no seal land at all. Set-screw geometry on this size: the two 120 deg screws bear on the 38.099999999999994 mm shaft inside the 36 mm total width while the outer ring is only 21 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "head- and tail-shaft pillow blocks in unit handling", "small packaging and labelling machines", "garden and groundcare equipment" ], "failure_modes": [ "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "relubricated with incompatible grease that hardens the factory fill and drags the seals" ], "pitfalls": [ "Do not specify the 38.099999999999994 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a one-side YAT insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 25.3 mm s1 dimension is the screw seating geometry inside the 15 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Catalogue ratings belong to YAT 208-108 as the grub one open execution; other order numbers of the YAT 208-108 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAT-208-108?", "a": "Boundary dimensions: bore 38.099999999999994 mm, sphered OD 80 mm, overall width 36 mm; weight 530 g. Loads: dynamic 30.7 kN, static 19 kN, fatigue 0.8 kN; the only published speed is the 4,800 r/min limiting value." }, { "q": "What does the designation YAT 208-108 mean?", "a": "reading the YAT basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAT carries the one-side-extended inner ring. inch bore code -108 decodes as 1\" +8/16, i.e. 38.1 mm; the metric coded size YAT 208 shares the same envelope but its bore is the metric value, not this one. with no -2F/-2RF suffix the order number denotes the open external execution of the YAR2 size — add external exclusion at the housing and plan relubrication intervals for dusty or wet surroundings." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." } ], "cross_ref": [ { "equiv_sku": "YAT", "equiv_brand": "ISO 15", "level": "full", "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAT-208-108", "YAT 208-108" ], "locale_variants": {} }, { "sku": "YAR-208-108-2RF-HV", "brand": "SKF", "manufacturer_designation": "YAR 208-108-2RF/HV", "series": "YAR2-series", "type": "insert", "d_mm": 38.099999999999994, "D_mm": 80, "B_mm": 49.2, "material": "SS440C", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 24.7, "static_load_kN": 19, "fatigue_load_limit_kN": 0.8, "limiting_speed_rpm": 2800, "max_rpm": 2800, "weight_g": 650, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAR 208-108-2RF/HV is a grub-screw insert bearing with the inner ring extended on both sides, 38.099999999999994x80x49.2 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -108 = 38.1 mm, which is why this row sits beside, not on, the metric bore size. HV is the corrosion-resistant food-range variant of the -2RF sealed design — stainless parts plus food-compatible rubber and lubricant, which also explains its lower published C and limiting speed. Envelope 38.099999999999994x80x49.2 mm (1.5x3.15x1.937 in), outer ring 21 mm wide, C 24.7 kN, C0 19 kN, Pu 0.8 kN. The catalogue publishes a single speed ceiling, the limiting speed: 2,800 r/min; mass 650 g. Load balance for documentation: C0 19 kN against C 24.7 kN gives a 0.769 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Speed ceiling of 2,800 r/min is the catalogue mechanical limit for THIS execution; the stainless/food-grade HV fill sets this lower value, so real fan duty is planned well below it. Imperial procurement cross-check: 1.5 in bore, 3.15 in OD, 1.937 in overall width; the 650 g mass converts to 0.650 kg (22.9 oz) for the bill of materials. Bore-to-OD planning: OD 80 over bore 38.099999999999994 is a 2.1x step, while bore/overall-width gives 0.774; the spherical seat in the matching Y-housing must be specified to the 80 mm OD, not to a cylindrical housing bore. Rating split for the maintenance file: dynamic 24.7 kN (L10), static 19 kN (s0 shock check), fatigue 0.8 kN (adjusted life) — three separate uses for YAR 208-108-2RF/HV, none interchangeable with another. Stainless food-range note: HV parts trade some capacity for corrosion resistance and food-compatible lubrication, and the printed limiting speed is set for that fill; do not top up with ordinary mineral grease in service — mixing greases can harden the food-grade fill and seize the seals. Service tip for YAR-208-108-2RF-HV: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 20.95 mm radial section.", "applications": [ "garden and groundcare equipment", "head- and tail-shaft pillow blocks in unit handling", "trough conveyor idler drives" ], "failure_modes": [ "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 38.099999999999994 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 30.2 mm s1 dimension is the screw seating geometry inside the 28.2 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Ordering discipline for the 38.099999999999994 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-208-108-2RF-HV?", "a": "The catalogue envelope is 38.099999999999994x80x49.2 mm with a spherical outside surface; mass 650 g. Ratings C 24.7/19 kN, Pu 0.8 kN, limiting speed 2,800 r/min." }, { "q": "What does the designation YAR 208-108-2RF/HV mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -108 = 38.1 mm, which is why this row sits beside, not on, the metric bore size. HV is the corrosion-resistant food-range variant of the -2RF sealed design — stainless parts plus food-compatible rubber and lubricant, which also explains its lower published C and limiting speed." }, { "q": "How is YAR-208-108-2RF-HV lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." }, { "q": "How do the set screws lock the 38.099999999999994 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." } ], "cross_ref": [ { "equiv_sku": "YAR-208-108-2RFGR-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 38.099999999999994x80x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 208-108-2RFGR/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YARAG-208-108", "equiv_brand": "SKF", "level": "partial", "note": "Same 38.099999999999994x80x49.2 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (24.7/19 kN vs 30.7/19 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-208-108-2RF", "equiv_brand": "SKF", "level": "partial", "note": "Same 38.099999999999994x80x49.2 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (24.7/19 kN vs 30.7/19 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-208-108-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 38.099999999999994x80x49.2 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (24.7/19 kN vs 30.7/19 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-208-108-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 38.099999999999994x80x49.2 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (24.7/19 kN vs 30.7/19 kN) — envelope match, not a load-rating equivalent." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-208-108-2RF-HV", "YAR 208-108-2RF/HV" ], "locale_variants": {} }, { "sku": "YAR-208-108-2RFGR-HV", "brand": "SKF", "manufacturer_designation": "YAR 208-108-2RFGR/HV", "series": "YAR2-series", "type": "insert", "d_mm": 38.099999999999994, "D_mm": 80, "B_mm": 49.2, "material": "SS440C", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 24.7, "static_load_kN": 19, "fatigue_load_limit_kN": 0.8, "limiting_speed_rpm": 2800, "max_rpm": 2800, "weight_g": 650, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 208-108-2RFGR/HV is a SKF insert bearing (Y-bearing) for a 38.099999999999994 mm (1.5 in) shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 80 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -108 decodes as 1\" +8/16, i.e. 38.1 mm; the metric coded size YAR 208 shares the same envelope but its bore is the metric value, not this one. the HV suffix means stainless rings and balls with food-grade compliant seals and grease (this article also carries the GR outside-surface lubrication groove); capacity is derated versus the carbon-steel part. Envelope 38.099999999999994x80x49.2 mm (1.5x3.15x1.937 in), outer ring 21 mm wide, C 24.7 kN, C0 19 kN, Pu 0.8 kN. The catalogue publishes a single speed ceiling, the limiting speed: 2,800 r/min; mass 650 g. Outer-vs-overall width: the outer ring is 21 mm wide inside the 49.2 mm total, so the extended inner ring accounts for 0.573 of the overall width (14.1 mm of axial projection per side). Static-first planning: the 0.386 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 38.099999999999994 mm shaft, not the 24.7 kN L10 value. Load balance for documentation: C0 19 kN against C 24.7 kN gives a 0.769 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Grease-life arithmetic is dominated by speed: at dn approx 1.65x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Bore-to-OD planning: OD 80 over bore 38.099999999999994 is a 2.1x step, while bore/overall-width gives 0.774; the spherical seat in the matching Y-housing must be specified to the 80 mm OD, not to a cylindrical housing bore. Stainless food-range note: HV parts trade some capacity for corrosion resistance and food-compatible lubrication, and the printed limiting speed is set for that fill; do not top up with ordinary mineral grease in service — mixing greases can harden the food-grade fill and seize the seals. Service tip for YAR-208-108-2RFGR-HV: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 20.95 mm radial section.", "applications": [ "head- and tail-shaft pillow blocks in unit handling", "small packaging and labelling machines", "garden and groundcare equipment" ], "failure_modes": [ "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "Do not specify the 38.099999999999994 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 30.2 mm s1 dimension is the screw seating geometry inside the 28.2 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Catalogue ratings belong to YAR 208-108-2RFGR/HV as the grub two hv execution; other order numbers of the YAR 208-108 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-208-108-2RFGR-HV?", "a": "Boundary dimensions: bore 38.099999999999994 mm, sphered OD 80 mm, overall width 49.2 mm; weight 650 g. Loads: dynamic 24.7 kN, static 19 kN, fatigue 0.8 kN; the only published speed is the 2,800 r/min limiting value." }, { "q": "What does the designation YAR 208-108-2RFGR/HV mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -108 decodes as 1\" +8/16, i.e. 38.1 mm; the metric coded size YAR 208 shares the same envelope but its bore is the metric value, not this one. the HV suffix means stainless rings and balls with food-grade compliant seals and grease (this article also carries the GR outside-surface lubrication groove); capacity is derated versus the carbon-steel part." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." } ], "cross_ref": [ { "equiv_sku": "YAR-208-108-2RF-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 38.099999999999994x80x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 208-108-2RF/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YARAG-208-108", "equiv_brand": "SKF", "level": "partial", "note": "Same 38.099999999999994x80x49.2 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (24.7/19 kN vs 30.7/19 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-208-108-2RF", "equiv_brand": "SKF", "level": "partial", "note": "Same 38.099999999999994x80x49.2 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (24.7/19 kN vs 30.7/19 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-208-108-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 38.099999999999994x80x49.2 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (24.7/19 kN vs 30.7/19 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-208-108-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 38.099999999999994x80x49.2 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (24.7/19 kN vs 30.7/19 kN) — envelope match, not a load-rating equivalent." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-208-108-2RFGR-HV", "YAR 208-108-2RFGR/HV" ], "locale_variants": {} }, { "sku": "YARAG-208-108", "brand": "SKF", "manufacturer_designation": "YARAG 208-108", "series": "YAR2-series", "type": "insert", "d_mm": 38.099999999999994, "D_mm": 80, "B_mm": 49.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 30.7, "static_load_kN": 19, "fatigue_load_limit_kN": 0.8, "limiting_speed_rpm": 950, "max_rpm": 950, "weight_g": 630, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YARAG 208-108 is SKF's 38.099999999999994 mm-bore grub-screw insert bearing with the inner ring extended on both sides in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 38.099999999999994x80x49.2 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -108 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 8/16 in = 38.1 mm (first digit whole inches, next two sixteenths of an inch). AG marks the agricultural-machinery application execution, built on the sealed both-sides-extended geometry and tuned for the low-speed, shock-laden duty of harvesters, balers and spreaders — note the catalogue prints a much reduced limiting speed for this variant. Envelope 38.099999999999994x80x49.2 mm (1.5x3.15x1.937 in), outer ring 21 mm wide, C 30.7 kN, C0 19 kN, Pu 0.8 kN. The catalogue publishes a single speed ceiling, the limiting speed: 950 r/min; mass 630 g. Spherical-seat note in numbers: the 80 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 59.05 = 185.511 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Capacity density: 30.7 kN from 0.630 kg of bearing steel is about 48.73 kN per kilogram, and per width millimetre the 49.2 mm unit carries 0.624 kN of dynamic capacity. Imperial procurement cross-check: 1.5 in bore, 3.15 in OD, 1.937 in overall width; the 630 g mass converts to 0.630 kg (22.2 oz) for the bill of materials. Mass-to-load ratio for YARAG-208-108: 20.521 g of catalogue mass per rated kN of C, and 16.535 g per millimetre of bore — useful when comparing executions of the same 38.099999999999994x80 mm envelope on the drawing. Grease-life arithmetic is dominated by speed: at dn approx 0.56x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the AG variant caps speed so aggressively, and high-temperature mounts shorten both even when load is light. Service tip for YARAG-208-108: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 20.95 mm radial section.", "applications": [ "head- and tail-shaft pillow blocks in unit handling", "trough conveyor idler drives", "small packaging and labelling machines" ], "failure_modes": [ "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "Do not specify the 38.099999999999994 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 30.2 mm s1 dimension is the screw seating geometry inside the 28.2 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Catalogue ratings belong to YARAG 208-108 as the grub two ag execution; other order numbers of the YARAG 208-108 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YARAG-208-108?", "a": "YARAG 208-108 measures 38.099999999999994 mm bore x 80 mm OD x 49.2 mm overall width (outer ring 21 mm wide), 1.5 x 3.15 x 1.937 in; mass about 630 g. SKF 17000 ratings: C 30.7 kN, C0 19 kN, Pu 0.8 kN, limiting speed 950 r/min." }, { "q": "What does the designation YARAG 208-108 mean?", "a": "the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -108 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 8/16 in = 38.1 mm (first digit whole inches, next two sixteenths of an inch). AG marks the agricultural-machinery application execution, built on the sealed both-sides-extended geometry and tuned for the low-speed, shock-laden duty of harvesters, balers and spreaders — note the catalogue prints a much reduced limiting speed for this variant." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." }, { "q": "How is YARAG-208-108 lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." } ], "cross_ref": [ { "equiv_sku": "YAR-208-108-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 38.099999999999994x80x49.2 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (30.7/19 kN vs 24.7/19 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-208-108-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 38.099999999999994x80x49.2 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (30.7/19 kN vs 24.7/19 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-208-108-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 38.099999999999994x80x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 208-108-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-208-108-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 38.099999999999994x80x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 208-108-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-208-108-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 38.099999999999994x80x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 208-108-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YARAG-208-108", "YARAG 208-108" ], "locale_variants": {} }, { "sku": "YAR-208-108-2RF", "brand": "SKF", "manufacturer_designation": "YAR 208-108-2RF", "series": "YAR2-series", "type": "insert", "d_mm": 38.099999999999994, "D_mm": 80, "B_mm": 49.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 30.7, "static_load_kN": 19, "fatigue_load_limit_kN": 0.8, "limiting_speed_rpm": 2800, "max_rpm": 2800, "weight_g": 650, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 208-108-2RF is a SKF insert bearing (Y-bearing) for a 38.099999999999994 mm (1.5 in) shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 80 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -108 decodes as 1\" +8/16, i.e. 38.1 mm; the metric coded size YAR 208 shares the same envelope but its bore is the metric value, not this one. -2RF means an NBR contact lip plus a rubber-coated flinger at both sides, the catalogue step above -2F for wet, abrasive or washed-down environments. Envelope 38.099999999999994x80x49.2 mm (1.5x3.15x1.937 in), outer ring 21 mm wide, C 30.7 kN, C0 19 kN, Pu 0.8 kN. The catalogue publishes a single speed ceiling, the limiting speed: 2,800 r/min; mass 650 g. Spherical-seat note in numbers: the 80 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 59.05 = 185.511 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Speed ceiling of 2,800 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Mass-to-load ratio for YAR-208-108-2RF: 21.173 g of catalogue mass per rated kN of C, and 17.06 g per millimetre of bore — useful when comparing executions of the same 38.099999999999994x80 mm envelope on the drawing. Selection figures for YAR 208-108-2RF: C0/C is 0.619, Pu 0.8 kN is 2.606 % of the 30.7 kN dynamic rating, and the 650 g catalogue mass works out to roughly 17.06 g per millimetre of the 38.099999999999994 mm bore. Imperial procurement cross-check: 1.5 in bore, 3.15 in OD, 1.937 in overall width; the 650 g mass converts to 0.650 kg (22.9 oz) for the bill of materials. Rubberized-flinger note: the -2RF coated throwers are vulcanized assemblies — never lever or hammer against the flinger when mounting, and press only on the inner ring when the bearing is fitted loose before the housing cap closes, or the flinger lip folds inward and grinds on the inner ring. Set-screw geometry on this size: the two 120 deg screws bear on the 38.099999999999994 mm shaft inside the 49.2 mm total width while the outer ring is only 21 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "head- and tail-shaft pillow blocks in unit handling", "trough conveyor idler drives", "small packaging and labelling machines" ], "failure_modes": [ "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "Do not specify the 38.099999999999994 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 30.2 mm s1 dimension is the screw seating geometry inside the 28.2 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Catalogue ratings belong to YAR 208-108-2RF as the grub two rf execution; other order numbers of the YAR 208-108 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-208-108-2RF?", "a": "Boundary dimensions: bore 38.099999999999994 mm, sphered OD 80 mm, overall width 49.2 mm; weight 650 g. Loads: dynamic 30.7 kN, static 19 kN, fatigue 0.8 kN; the only published speed is the 2,800 r/min limiting value." }, { "q": "What does the designation YAR 208-108-2RF mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -108 decodes as 1\" +8/16, i.e. 38.1 mm; the metric coded size YAR 208 shares the same envelope but its bore is the metric value, not this one. -2RF means an NBR contact lip plus a rubber-coated flinger at both sides, the catalogue step above -2F for wet, abrasive or washed-down environments." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." }, { "q": "How is YAR-208-108-2RF lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." } ], "cross_ref": [ { "equiv_sku": "YAR-208-108-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 38.099999999999994x80x49.2 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (30.7/19 kN vs 24.7/19 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-208-108-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 38.099999999999994x80x49.2 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (30.7/19 kN vs 24.7/19 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YARAG-208-108", "equiv_brand": "SKF", "level": "full", "note": "Same 38.099999999999994x80x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 208-108 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-208-108-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 38.099999999999994x80x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 208-108-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-208-108-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 38.099999999999994x80x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 208-108-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-208-108-2RF", "YAR 208-108-2RF" ], "locale_variants": {} }, { "sku": "YAR-208-108-2RF-VE495", "brand": "SKF", "manufacturer_designation": "YAR 208-108-2RF/VE495", "series": "YAR2-series", "type": "insert", "d_mm": 38.099999999999994, "D_mm": 80, "B_mm": 49.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 30.7, "static_load_kN": 19, "fatigue_load_limit_kN": 0.8, "limiting_speed_rpm": 2800, "max_rpm": 2800, "weight_g": 650, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAR 208-108-2RF/VE495 is a grub-screw insert bearing with the inner ring extended on both sides, 38.099999999999994x80x49.2 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -108 = 38.1 mm, which is why this row sits beside, not on, the metric bore size. VE495 denotes galvanized rings plus food-compatible sealing components and grease, aimed at humid, cleaned-down installations rather than submerged chemical duty. Envelope 38.099999999999994x80x49.2 mm (1.5x3.15x1.937 in), outer ring 21 mm wide, C 30.7 kN, C0 19 kN, Pu 0.8 kN. The catalogue publishes a single speed ceiling, the limiting speed: 2,800 r/min; mass 650 g. Fatigue-limit check: Pu 0.8 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YAR 208-108-2RF/VE495 — most belt-driven mounted-unit loads sit comfortably under 2.606 % of C. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 51.8 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the inner flinger. Grease-life arithmetic is dominated by speed: at dn approx 1.65x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Static-first planning: the 0.386 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 38.099999999999994 mm shaft, not the 30.7 kN L10 value. Bore-to-OD planning: OD 80 over bore 38.099999999999994 is a 2.1x step, while bore/overall-width gives 0.774; the spherical seat in the matching Y-housing must be specified to the 80 mm OD, not to a cylindrical housing bore. Zinc-coated food-range note: the VE495 plating is a functional surface, not cosmetic; clean the bore and shaft WITHOUT steel brushes or aggressive descalers, mount dry or with the approved food-grade mounting paste, and touch up damaged plating spots before commissioning the wash-down area. Set-screw geometry on this size: the two 120 deg screws bear on the 38.099999999999994 mm shaft inside the 49.2 mm total width while the outer ring is only 21 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "small packaging and labelling machines", "trough conveyor idler drives", "head- and tail-shaft pillow blocks in unit handling" ], "failure_modes": [ "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "Do not specify the 38.099999999999994 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 30.2 mm s1 dimension is the screw seating geometry inside the 28.2 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Catalogue ratings belong to YAR 208-108-2RF/VE495 as the grub two ve495 execution; other order numbers of the YAR 208-108 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-208-108-2RF-VE495?", "a": "The catalogue envelope is 38.099999999999994x80x49.2 mm with a spherical outside surface; mass 650 g. Ratings C 30.7/19 kN, Pu 0.8 kN, limiting speed 2,800 r/min." }, { "q": "What does the designation YAR 208-108-2RF/VE495 mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -108 = 38.1 mm, which is why this row sits beside, not on, the metric bore size. VE495 denotes galvanized rings plus food-compatible sealing components and grease, aimed at humid, cleaned-down installations rather than submerged chemical duty." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." }, { "q": "How is YAR-208-108-2RF-VE495 lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." } ], "cross_ref": [ { "equiv_sku": "YAR-208-108-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 38.099999999999994x80x49.2 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (30.7/19 kN vs 24.7/19 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-208-108-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 38.099999999999994x80x49.2 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (30.7/19 kN vs 24.7/19 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YARAG-208-108", "equiv_brand": "SKF", "level": "full", "note": "Same 38.099999999999994x80x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 208-108 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-208-108-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 38.099999999999994x80x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 208-108-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-208-108-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 38.099999999999994x80x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 208-108-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-208-108-2RF-VE495", "YAR 208-108-2RF/VE495" ], "locale_variants": {} }, { "sku": "YAR-208-108-2F", "brand": "SKF", "manufacturer_designation": "YAR 208-108-2F", "series": "YAR2-series", "type": "insert", "d_mm": 38.099999999999994, "D_mm": 80, "B_mm": 49.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 30.7, "static_load_kN": 19, "fatigue_load_limit_kN": 0.8, "limiting_speed_rpm": 4800, "max_rpm": 4800, "weight_g": 650, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 208-108-2F is a SKF insert bearing (Y-bearing) for a 38.099999999999994 mm (1.5 in) shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 80 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -108 decodes as 1\" +8/16, i.e. 38.1 mm; the metric coded size YAR 208 shares the same envelope but its bore is the metric value, not this one. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 38.099999999999994x80x49.2 mm (1.5x3.15x1.937 in), outer ring 21 mm wide, C 30.7 kN, C0 19 kN, Pu 0.8 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,800 r/min; mass 650 g. Outer-vs-overall width: the outer ring is 21 mm wide inside the 49.2 mm total, so the extended inner ring accounts for 0.573 of the overall width (14.1 mm of axial projection per side). Imperial procurement cross-check: 1.5 in bore, 3.15 in OD, 1.937 in overall width; the 650 g mass converts to 0.650 kg (22.9 oz) for the bill of materials. Load balance for documentation: C0 19 kN against C 30.7 kN gives a 0.619 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Rating split for the maintenance file: dynamic 30.7 kN (L10), static 19 kN (s0 shock check), fatigue 0.8 kN (adjusted life) — three separate uses for YAR 208-108-2F, none interchangeable with another. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 38.099999999999994x80 mm insert on its chamfer tilts the whole spherical seat. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Service tip for YAR-208-108-2F: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 20.95 mm radial section.", "applications": [ "head- and tail-shaft pillow blocks in unit handling", "garden and groundcare equipment", "trough conveyor idler drives" ], "failure_modes": [ "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "relubricated with incompatible grease that hardens the factory fill and drags the seals" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 38.099999999999994 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 30.2 mm s1 dimension is the screw seating geometry inside the 28.2 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Ordering discipline for the 38.099999999999994 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-208-108-2F?", "a": "Boundary dimensions: bore 38.099999999999994 mm, sphered OD 80 mm, overall width 49.2 mm; weight 650 g. Loads: dynamic 30.7 kN, static 19 kN, fatigue 0.8 kN; the only published speed is the 4,800 r/min limiting value." }, { "q": "What does the designation YAR 208-108-2F mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -108 decodes as 1\" +8/16, i.e. 38.1 mm; the metric coded size YAR 208 shares the same envelope but its bore is the metric value, not this one. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "How is YAR-208-108-2F lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." }, { "q": "How do the set screws lock the 38.099999999999994 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." } ], "cross_ref": [ { "equiv_sku": "YAR-208-108-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 38.099999999999994x80x49.2 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (30.7/19 kN vs 24.7/19 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-208-108-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 38.099999999999994x80x49.2 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (30.7/19 kN vs 24.7/19 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YARAG-208-108", "equiv_brand": "SKF", "level": "full", "note": "Same 38.099999999999994x80x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 208-108 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-208-108-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 38.099999999999994x80x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 208-108-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-208-108-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 38.099999999999994x80x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 208-108-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-208-108-2F", "YAR 208-108-2F" ], "locale_variants": {} }, { "sku": "YAR-209-108-2F", "brand": "SKF", "manufacturer_designation": "YAR 209-108-2F", "series": "YAR2-series", "type": "insert", "d_mm": 38.099999999999994, "D_mm": 85, "B_mm": 49.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 33.2, "static_load_kN": 21.6, "fatigue_load_limit_kN": 0.915, "limiting_speed_rpm": 4300, "max_rpm": 4300, "weight_g": 840, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YAR 209-108-2F is SKF's 38.099999999999994 mm-bore grub-screw insert bearing with the inner ring extended on both sides in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 38.099999999999994x85x49.2 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -108 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 8/16 in = 38.1 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 38.099999999999994x85x49.2 mm (1.5x3.346x1.937 in), outer ring 22 mm wide, C 33.2 kN, C0 21.6 kN, Pu 0.915 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,300 r/min; mass 840 g. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 56.8 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the plain flinger. Capacity density: 33.2 kN from 0.840 kg of bearing steel is about 39.524 kN per kilogram, and per width millimetre the 49.2 mm unit carries 0.675 kN of dynamic capacity. Selection figures for YAR 209-108-2F: C0/C is 0.651, Pu 0.915 kN is 2.756 % of the 33.2 kN dynamic rating, and the 840 g catalogue mass works out to roughly 22.047 g per millimetre of the 38.099999999999994 mm bore. Imperial procurement cross-check: 1.5 in bore, 3.346 in OD, 1.937 in overall width; the 840 g mass converts to 0.840 kg (29.6 oz) for the bill of materials. Speed ceiling of 4,300 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Set-screw geometry on this size: the two 120 deg screws bear on the 38.099999999999994 mm shaft inside the 49.2 mm total width while the outer ring is only 22 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "trough conveyor idler drives", "small packaging and labelling machines", "ventilation and extraction fans" ], "failure_modes": [ "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "The 30.2 mm s1 dimension is the screw seating geometry inside the 27.2 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 38.099999999999994 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 33.2/21.6 kN figures belong specifically to YAR 209-108-2F; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-209-108-2F?", "a": "YAR 209-108-2F measures 38.099999999999994 mm bore x 85 mm OD x 49.2 mm overall width (outer ring 22 mm wide), 1.5 x 3.346 x 1.937 in; mass about 840 g. SKF 17000 ratings: C 33.2 kN, C0 21.6 kN, Pu 0.915 kN, limiting speed 4,300 r/min." }, { "q": "What does the designation YAR 209-108-2F mean?", "a": "the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -108 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 8/16 in = 38.1 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." }, { "q": "How is YAR-209-108-2F lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." } ], "cross_ref": [ { "equiv_sku": "YAR", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-209-108-2F", "YAR 209-108-2F" ], "locale_variants": {} }, { "sku": "YAR-208-109-2F", "brand": "SKF", "manufacturer_designation": "YAR 208-109-2F", "series": "YAR2-series", "type": "insert", "d_mm": 39.6875, "D_mm": 80, "B_mm": 49.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 30.7, "static_load_kN": 19, "fatigue_load_limit_kN": 0.8, "limiting_speed_rpm": 4800, "max_rpm": 4800, "weight_g": 610, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YAR 208-109-2F is SKF's 39.6875 mm-bore grub-screw insert bearing with the inner ring extended on both sides in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 39.6875x80x49.2 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -109 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 9/16 in = 39.688 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 39.6875x80x49.2 mm (1.563x3.15x1.937 in), outer ring 21 mm wide, C 30.7 kN, C0 19 kN, Pu 0.8 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,800 r/min; mass 610 g. Selection figures for YAR 208-109-2F: C0/C is 0.619, Pu 0.8 kN is 2.606 % of the 30.7 kN dynamic rating, and the 610 g catalogue mass works out to roughly 15.37 g per millimetre of the 39.6875 mm bore. Rating split for the maintenance file: dynamic 30.7 kN (L10), static 19 kN (s0 shock check), fatigue 0.8 kN (adjusted life) — three separate uses for YAR 208-109-2F, none interchangeable with another. Static-first planning: the 0.386 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 39.6875 mm shaft, not the 30.7 kN L10 value. Capacity density: 30.7 kN from 0.610 kg of bearing steel is about 50.328 kN per kilogram, and per width millimetre the 49.2 mm unit carries 0.624 kN of dynamic capacity. Grease-life arithmetic is dominated by speed: at dn approx 2.87x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Set-screw geometry on this size: the two 120 deg screws bear on the 39.6875 mm shaft inside the 49.2 mm total width while the outer ring is only 21 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "small packaging and labelling machines", "ventilation and extraction fans", "trough conveyor idler drives" ], "failure_modes": [ "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 39.6875 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 30.2 mm s1 dimension is the screw seating geometry inside the 28.2 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Ordering discipline for the 39.6875 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-208-109-2F?", "a": "YAR 208-109-2F measures 39.6875 mm bore x 80 mm OD x 49.2 mm overall width (outer ring 21 mm wide), 1.563 x 3.15 x 1.937 in; mass about 610 g. SKF 17000 ratings: C 30.7 kN, C0 19 kN, Pu 0.8 kN, limiting speed 4,800 r/min." }, { "q": "What does the designation YAR 208-109-2F mean?", "a": "the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -109 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 9/16 in = 39.688 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "How do the set screws lock the 39.6875 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." } ], "cross_ref": [ { "equiv_sku": "YAR-208-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 39.6875x80x49.2 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (30.7/19 kN vs 24.7/19 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 39.6875 mm vs 40 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-208-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 39.6875x80x49.2 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (30.7/19 kN vs 24.7/19 kN) — envelope match, not a load-rating equivalent. NOTE the bore differs: 39.6875 mm vs 40 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YARAG-208", "equiv_brand": "SKF", "level": "full", "note": "Same 39.6875x80x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 208 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 39.6875 mm vs 40 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-208-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 39.6875x80x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 208-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 39.6875 mm vs 40 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-208-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 39.6875x80x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 208-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 39.6875 mm vs 40 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YAR-208-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 39.6875x80x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 208-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 39.6875 mm vs 40 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-208-109-2F", "YAR 208-109-2F" ], "locale_variants": {} }, { "sku": "YARAG-209-110", "brand": "SKF", "manufacturer_designation": "YARAG 209-110", "series": "YAR2-series", "type": "insert", "d_mm": 41.275, "D_mm": 85, "B_mm": 49.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 33.2, "static_load_kN": 21.6, "fatigue_load_limit_kN": 0.915, "limiting_speed_rpm": 850, "max_rpm": 850, "weight_g": 750, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YARAG 209-110 is a SKF insert bearing (Y-bearing) for a 41.275 mm (1.625 in) shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 85 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -110 decodes as 1\" +10/16, i.e. 41.275 mm; the metric coded size YARAG 209 shares the same envelope but its bore is the metric value, not this one. the AG suffix identifies the farm-duty variant of the range: sealed and flinger-protected for chaff and dust, with the catalogue deliberately derating its permissible speed versus the industrial execution. Envelope 41.275x85x49.2 mm (1.625x3.346x1.937 in), outer ring 22 mm wide, C 33.2 kN, C0 21.6 kN, Pu 0.915 kN. The catalogue publishes a single speed ceiling, the limiting speed: 850 r/min; mass 750 g. At the printed limiting speed of 850 r/min the mean diameter dm = 63.138 mm implies dn about 0.54x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 56.8 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the inner flinger. Rating split for the maintenance file: dynamic 33.2 kN (L10), static 21.6 kN (s0 shock check), fatigue 0.915 kN (adjusted life) — three separate uses for YARAG 209-110, none interchangeable with another. Imperial procurement cross-check: 1.625 in bore, 3.346 in OD, 1.937 in overall width; the 750 g mass converts to 0.750 kg (26.5 oz) for the bill of materials. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 41.275x85 mm insert on its chamfer tilts the whole spherical seat. Set-screw geometry on this size: the two 120 deg screws bear on the 41.275 mm shaft inside the 49.2 mm total width while the outer ring is only 22 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "trough conveyor idler drives", "ventilation and extraction fans", "small packaging and labelling machines" ], "failure_modes": [ "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 41.275 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 30.2 mm s1 dimension is the screw seating geometry inside the 27.2 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Ordering discipline for the 41.275 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YARAG-209-110?", "a": "Boundary dimensions: bore 41.275 mm, sphered OD 85 mm, overall width 49.2 mm; weight 750 g. Loads: dynamic 33.2 kN, static 21.6 kN, fatigue 0.915 kN; the only published speed is the 850 r/min limiting value." }, { "q": "What does the designation YARAG 209-110 mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -110 decodes as 1\" +10/16, i.e. 41.275 mm; the metric coded size YARAG 209 shares the same envelope but its bore is the metric value, not this one. the AG suffix identifies the farm-duty variant of the range: sealed and flinger-protected for chaff and dust, with the catalogue deliberately derating its permissible speed versus the industrial execution." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." }, { "q": "How is YARAG-209-110 lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." } ], "cross_ref": [ { "equiv_sku": "YAR-209-110-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 41.275x85x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 209-110-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YARAG-209-110", "YARAG 209-110" ], "locale_variants": {} }, { "sku": "YAR-209-110-2F", "brand": "SKF", "manufacturer_designation": "YAR 209-110-2F", "series": "YAR2-series", "type": "insert", "d_mm": 41.275, "D_mm": 85, "B_mm": 49.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 33.2, "static_load_kN": 21.6, "fatigue_load_limit_kN": 0.915, "limiting_speed_rpm": 4300, "max_rpm": 4300, "weight_g": 770, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 209-110-2F is a SKF insert bearing (Y-bearing) for a 41.275 mm (1.625 in) shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 85 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -110 decodes as 1\" +10/16, i.e. 41.275 mm; the metric coded size YAR 209 shares the same envelope but its bore is the metric value, not this one. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 41.275x85x49.2 mm (1.625x3.346x1.937 in), outer ring 22 mm wide, C 33.2 kN, C0 21.6 kN, Pu 0.915 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,300 r/min; mass 770 g. Rating split for the maintenance file: dynamic 33.2 kN (L10), static 21.6 kN (s0 shock check), fatigue 0.915 kN (adjusted life) — three separate uses for YAR 209-110-2F, none interchangeable with another. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 41.275x85 mm insert on its chamfer tilts the whole spherical seat. The s1 30.2 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Spherical-seat note in numbers: the 85 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 63.138 = 198.354 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Envelope arithmetic: the radial section from 41.275 mm bore to 85 mm OD is 21.863 mm; dividing C 33.2 kN by that section gives 1.519 kN per section millimetre, and the 49.2 mm overall width is 2.25x the section. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Service tip for YAR-209-110-2F: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 21.863 mm radial section.", "applications": [ "ventilation and extraction fans", "head- and tail-shaft pillow blocks in unit handling", "trough conveyor idler drives" ], "failure_modes": [ "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "The 30.2 mm s1 dimension is the screw seating geometry inside the 27.2 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 41.275 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 33.2/21.6 kN figures belong specifically to YAR 209-110-2F; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-209-110-2F?", "a": "Boundary dimensions: bore 41.275 mm, sphered OD 85 mm, overall width 49.2 mm; weight 770 g. Loads: dynamic 33.2 kN, static 21.6 kN, fatigue 0.915 kN; the only published speed is the 4,300 r/min limiting value." }, { "q": "What does the designation YAR 209-110-2F mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -110 decodes as 1\" +10/16, i.e. 41.275 mm; the metric coded size YAR 209 shares the same envelope but its bore is the metric value, not this one. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "How is YAR-209-110-2F lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." }, { "q": "How do the set screws lock the 41.275 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." } ], "cross_ref": [ { "equiv_sku": "YARAG-209-110", "equiv_brand": "SKF", "level": "full", "note": "Same 41.275x85x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 209-110 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-209-110-2F", "YAR 209-110-2F" ], "locale_variants": {} }, { "sku": "YAT-209-111", "brand": "SKF", "manufacturer_designation": "YAT 209-111", "series": "YAR2-series", "type": "insert", "d_mm": 42.8625, "D_mm": 85, "B_mm": 37, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 33.2, "static_load_kN": 21.6, "fatigue_load_limit_kN": 0.915, "limiting_speed_rpm": 4300, "max_rpm": 4300, "weight_g": 610, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAT 209-111 is a SKF insert bearing (Y-bearing) for a 42.8625 mm (1.688 in) shaft: grub-screw insert bearing with the inner ring extended on one side, built to the ISO 15 diameter-series envelope with a sphered OD of 85 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAT basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAT carries the one-side-extended inner ring. inch bore code -111 decodes as 1\" +11/16, i.e. 42.862 mm; the metric coded size YAT 209 shares the same envelope but its bore is the metric value, not this one. with no -2F/-2RF suffix the order number denotes the open external execution of the YAR2 size — add external exclusion at the housing and plan relubrication intervals for dusty or wet surroundings. Envelope 42.8625x85x37 mm (1.688x3.346x1.457 in), outer ring 22 mm wide, C 33.2 kN, C0 21.6 kN, Pu 0.915 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,300 r/min; mass 610 g. Grease-life arithmetic is dominated by speed: at dn approx 2.75x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Bore-to-OD planning: OD 85 over bore 42.8625 is a 1.983x step, while bore/overall-width gives 1.158; the spherical seat in the matching Y-housing must be specified to the 85 mm OD, not to a cylindrical housing bore. Imperial procurement cross-check: 1.688 in bore, 3.346 in OD, 1.457 in overall width; the 610 g mass converts to 0.610 kg (21.5 oz) for the bill of materials. Mass-to-load ratio for YAT-209-111: 18.373 g of catalogue mass per rated kN of C, and 14.232 g per millimetre of bore — useful when comparing executions of the same 42.8625x85 mm envelope on the drawing. Selection figures for YAT 209-111: C0/C is 0.651, Pu 0.915 kN is 2.756 % of the 33.2 kN dynamic rating, and the 610 g catalogue mass works out to roughly 14.232 g per millimetre of the 42.8625 mm bore. Single-extension fitting note: with the inner ring extended only on the locking side, orient the open (non-extended) face toward the shaft step or housing shoulder as the drawing shows — reversed, the set screws end up unsupported by the abutment and the shortened side offers no seal land at all. Service tip for YAT-209-111: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 21.069 mm radial section.", "applications": [ "trough conveyor idler drives", "ventilation and extraction fans", "garden and groundcare equipment" ], "failure_modes": [ "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "relubricated with incompatible grease that hardens the factory fill and drags the seals" ], "pitfalls": [ "The 25.8 mm s1 dimension is the screw seating geometry inside the 15 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 42.8625 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a one-side YAT insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 33.2/21.6 kN figures belong specifically to YAT 209-111; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAT-209-111?", "a": "Boundary dimensions: bore 42.8625 mm, sphered OD 85 mm, overall width 37 mm; weight 610 g. Loads: dynamic 33.2 kN, static 21.6 kN, fatigue 0.915 kN; the only published speed is the 4,300 r/min limiting value." }, { "q": "What does the designation YAT 209-111 mean?", "a": "reading the YAT basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAT carries the one-side-extended inner ring. inch bore code -111 decodes as 1\" +11/16, i.e. 42.862 mm; the metric coded size YAT 209 shares the same envelope but its bore is the metric value, not this one. with no -2F/-2RF suffix the order number denotes the open external execution of the YAR2 size — add external exclusion at the housing and plan relubrication intervals for dusty or wet surroundings." }, { "q": "How do the set screws lock the 42.8625 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." } ], "cross_ref": [ { "equiv_sku": "YAT", "equiv_brand": "ISO 15", "level": "full", "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAT-209-111", "YAT 209-111" ], "locale_variants": {} }, { "sku": "YARAG-209-111", "brand": "SKF", "manufacturer_designation": "YARAG 209-111", "series": "YAR2-series", "type": "insert", "d_mm": 42.8625, "D_mm": 85, "B_mm": 49.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 33.2, "static_load_kN": 21.6, "fatigue_load_limit_kN": 0.915, "limiting_speed_rpm": 850, "max_rpm": 850, "weight_g": 710, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YARAG 209-111 is a grub-screw insert bearing with the inner ring extended on both sides, 42.8625x85x49.2 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -111 = 42.862 mm, which is why this row sits beside, not on, the metric bore size. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery. Envelope 42.8625x85x49.2 mm (1.688x3.346x1.937 in), outer ring 22 mm wide, C 33.2 kN, C0 21.6 kN, Pu 0.915 kN. The catalogue publishes a single speed ceiling, the limiting speed: 850 r/min; mass 710 g. Load balance for documentation: C0 21.6 kN against C 33.2 kN gives a 0.651 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Pitch-diameter arithmetic: dm = (42.8625+85)/2 = 63.931 mm; at the 850 r/min limiting speed the ball set runs at dn approx 0.54x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Grease-life arithmetic is dominated by speed: at dn approx 0.54x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the AG variant caps speed so aggressively, and high-temperature mounts shorten both even when load is light. Envelope arithmetic: the radial section from 42.8625 mm bore to 85 mm OD is 21.069 mm; dividing C 33.2 kN by that section gives 1.576 kN per section millimetre, and the 49.2 mm overall width is 2.335x the section. The s1 30.2 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Set-screw geometry on this size: the two 120 deg screws bear on the 42.8625 mm shaft inside the 49.2 mm total width while the outer ring is only 22 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "small packaging and labelling machines", "trough conveyor idler drives", "garden and groundcare equipment" ], "failure_modes": [ "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "The 30.2 mm s1 dimension is the screw seating geometry inside the 27.2 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 42.8625 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 33.2/21.6 kN figures belong specifically to YARAG 209-111; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YARAG-209-111?", "a": "The catalogue envelope is 42.8625x85x49.2 mm with a spherical outside surface; mass 710 g. Ratings C 33.2/21.6 kN, Pu 0.915 kN, limiting speed 850 r/min." }, { "q": "What does the designation YARAG 209-111 mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -111 = 42.862 mm, which is why this row sits beside, not on, the metric bore size. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." }, { "q": "How is YARAG-209-111 lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." } ], "cross_ref": [ { "equiv_sku": "YAR-209-111-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 42.8625x85x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 209-111-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YARAG-209-111", "YARAG 209-111" ], "locale_variants": {} }, { "sku": "YAR-209-111-2F", "brand": "SKF", "manufacturer_designation": "YAR 209-111-2F", "series": "YAR2-series", "type": "insert", "d_mm": 42.8625, "D_mm": 85, "B_mm": 49.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 33.2, "static_load_kN": 21.6, "fatigue_load_limit_kN": 0.915, "limiting_speed_rpm": 4300, "max_rpm": 4300, "weight_g": 730, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAR 209-111-2F is a grub-screw insert bearing with the inner ring extended on both sides, 42.8625x85x49.2 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -111 = 42.862 mm, which is why this row sits beside, not on, the metric bore size. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution. Envelope 42.8625x85x49.2 mm (1.688x3.346x1.937 in), outer ring 22 mm wide, C 33.2 kN, C0 21.6 kN, Pu 0.915 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,300 r/min; mass 730 g. Spherical-seat note in numbers: the 85 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 63.931 = 200.845 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Grease-life arithmetic is dominated by speed: at dn approx 2.75x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 42.8625x85 mm insert on its chamfer tilts the whole spherical seat. Pitch-diameter arithmetic: dm = (42.8625+85)/2 = 63.931 mm; at the 4,300 r/min limiting speed the ball set runs at dn approx 2.75x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Speed ceiling of 4,300 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Service tip for YAR-209-111-2F: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 21.069 mm radial section.", "applications": [ "ventilation and extraction fans", "garden and groundcare equipment", "small packaging and labelling machines" ], "failure_modes": [ "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "The 30.2 mm s1 dimension is the screw seating geometry inside the 27.2 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 42.8625 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 33.2/21.6 kN figures belong specifically to YAR 209-111-2F; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-209-111-2F?", "a": "The catalogue envelope is 42.8625x85x49.2 mm with a spherical outside surface; mass 730 g. Ratings C 33.2/21.6 kN, Pu 0.915 kN, limiting speed 4,300 r/min." }, { "q": "What does the designation YAR 209-111-2F mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -111 = 42.862 mm, which is why this row sits beside, not on, the metric bore size. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YARAG-209-111", "equiv_brand": "SKF", "level": "full", "note": "Same 42.8625x85x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 209-111 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-209-111-2F", "YAR 209-111-2F" ], "locale_variants": {} }, { "sku": "YAT-209-112", "brand": "SKF", "manufacturer_designation": "YAT 209-112", "series": "YAR2-series", "type": "insert", "d_mm": 44.449999999999996, "D_mm": 85, "B_mm": 37, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 33.2, "static_load_kN": 21.6, "fatigue_load_limit_kN": 0.915, "limiting_speed_rpm": 4300, "max_rpm": 4300, "weight_g": 580, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAT 209-112 is a grub-screw insert bearing with the inner ring extended on one side, 44.449999999999996x85x37 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAT is SKF's grub-screw insert design — a single extended inner-ring side housing the two 120 deg set screws. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -112 = 44.45 mm, which is why this row sits beside, not on, the metric bore size. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units. Envelope 44.449999999999996x85x37 mm (1.75x3.346x1.457 in), outer ring 22 mm wide, C 33.2 kN, C0 21.6 kN, Pu 0.915 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,300 r/min; mass 580 g. Mass-to-load ratio for YAT-209-112: 17.47 g of catalogue mass per rated kN of C, and 13.048 g per millimetre of bore — useful when comparing executions of the same 44.449999999999996x85 mm envelope on the drawing. Width accounting on this execution: 37 mm overall and 22 mm outer-ring width leave the housing designer 15 mm of inner-ring projection to accommodate the locking arrangement. Pitch-diameter arithmetic: dm = (44.449999999999996+85)/2 = 64.725 mm; at the 4,300 r/min limiting speed the ball set runs at dn approx 2.78x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. At the printed limiting speed of 4,300 r/min the mean diameter dm = 64.725 mm implies dn about 2.78x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Load balance for documentation: C0 21.6 kN against C 33.2 kN gives a 0.651 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Single-extension fitting note: with the inner ring extended only on the locking side, orient the open (non-extended) face toward the shaft step or housing shoulder as the drawing shows — reversed, the set screws end up unsupported by the abutment and the shortened side offers no seal land at all. Service tip for YAT-209-112: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 20.275 mm radial section.", "applications": [ "ventilation and extraction fans", "small packaging and labelling machines", "garden and groundcare equipment" ], "failure_modes": [ "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "Do not specify the 44.449999999999996 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 25.8 mm s1 dimension is the screw seating geometry inside the 15 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a one-side YAT insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Catalogue ratings belong to YAT 209-112 as the grub one open execution; other order numbers of the YAT 209-112 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAT-209-112?", "a": "The catalogue envelope is 44.449999999999996x85x37 mm with a spherical outside surface; mass 580 g. Ratings C 33.2/21.6 kN, Pu 0.915 kN, limiting speed 4,300 r/min." }, { "q": "What does the designation YAT 209-112 mean?", "a": "YAT is SKF's grub-screw insert design — a single extended inner-ring side housing the two 120 deg set screws. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -112 = 44.45 mm, which is why this row sits beside, not on, the metric bore size. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." } ], "cross_ref": [ { "equiv_sku": "YAT", "equiv_brand": "ISO 15", "level": "full", "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAT-209-112", "YAT 209-112" ], "locale_variants": {} }, { "sku": "YAR-209-112-2RF", "brand": "SKF", "manufacturer_designation": "YAR 209-112-2RF", "series": "YAR2-series", "type": "insert", "d_mm": 44.449999999999996, "D_mm": 85, "B_mm": 49.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 33.2, "static_load_kN": 21.6, "fatigue_load_limit_kN": 0.915, "limiting_speed_rpm": 2400, "max_rpm": 2400, "weight_g": 690, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAR 209-112-2RF is a grub-screw insert bearing with the inner ring extended on both sides, 44.449999999999996x85x49.2 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -112 = 44.45 mm, which is why this row sits beside, not on, the metric bore size. the -2RF external design combines contact nitrile seals with rubberized additional flingers on both sides for a tighter labyrinth than the plain-flinger -2F execution. Envelope 44.449999999999996x85x49.2 mm (1.75x3.346x1.937 in), outer ring 22 mm wide, C 33.2 kN, C0 21.6 kN, Pu 0.915 kN. The catalogue publishes a single speed ceiling, the limiting speed: 2,400 r/min; mass 690 g. Speed ceiling of 2,400 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. The s1 30.2 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Load balance for documentation: C0 21.6 kN against C 33.2 kN gives a 0.651 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. At the printed limiting speed of 2,400 r/min the mean diameter dm = 64.725 mm implies dn about 1.55x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Pitch-diameter arithmetic: dm = (44.449999999999996+85)/2 = 64.725 mm; at the 2,400 r/min limiting speed the ball set runs at dn approx 1.55x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Rubberized-flinger note: the -2RF coated throwers are vulcanized assemblies — never lever or hammer against the flinger when mounting, and press only on the inner ring when the bearing is fitted loose before the housing cap closes, or the flinger lip folds inward and grinds on the inner ring. Service tip for YAR-209-112-2RF: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 20.275 mm radial section.", "applications": [ "garden and groundcare equipment", "ventilation and extraction fans", "trough conveyor idler drives" ], "failure_modes": [ "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 44.449999999999996 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 30.2 mm s1 dimension is the screw seating geometry inside the 27.2 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Ordering discipline for the 44.449999999999996 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-209-112-2RF?", "a": "The catalogue envelope is 44.449999999999996x85x49.2 mm with a spherical outside surface; mass 690 g. Ratings C 33.2/21.6 kN, Pu 0.915 kN, limiting speed 2,400 r/min." }, { "q": "What does the designation YAR 209-112-2RF mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -112 = 44.45 mm, which is why this row sits beside, not on, the metric bore size. the -2RF external design combines contact nitrile seals with rubberized additional flingers on both sides for a tighter labyrinth than the plain-flinger -2F execution." }, { "q": "How do the set screws lock the 44.449999999999996 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." } ], "cross_ref": [ { "equiv_sku": "YAR-209-112-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 44.449999999999996x85x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 209-112-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-209-112-2RF", "YAR 209-112-2RF" ], "locale_variants": {} }, { "sku": "YAR-209-112-2F", "brand": "SKF", "manufacturer_designation": "YAR 209-112-2F", "series": "YAR2-series", "type": "insert", "d_mm": 44.449999999999996, "D_mm": 85, "B_mm": 49.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 33.2, "static_load_kN": 21.6, "fatigue_load_limit_kN": 0.915, "limiting_speed_rpm": 4300, "max_rpm": 4300, "weight_g": 690, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YAR 209-112-2F is SKF's 44.449999999999996 mm-bore grub-screw insert bearing with the inner ring extended on both sides in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 44.449999999999996x85x49.2 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -112 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 12/16 in = 44.45 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 44.449999999999996x85x49.2 mm (1.75x3.346x1.937 in), outer ring 22 mm wide, C 33.2 kN, C0 21.6 kN, Pu 0.915 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,300 r/min; mass 690 g. Grease-life arithmetic is dominated by speed: at dn approx 2.78x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Spherical-seat note in numbers: the 85 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 64.725 = 203.34 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Pitch-diameter arithmetic: dm = (44.449999999999996+85)/2 = 64.725 mm; at the 4,300 r/min limiting speed the ball set runs at dn approx 2.78x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Load balance for documentation: C0 21.6 kN against C 33.2 kN gives a 0.651 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Rating split for the maintenance file: dynamic 33.2 kN (L10), static 21.6 kN (s0 shock check), fatigue 0.915 kN (adjusted life) — three separate uses for YAR 209-112-2F, none interchangeable with another. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Service tip for YAR-209-112-2F: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 20.275 mm radial section.", "applications": [ "ventilation and extraction fans", "trough conveyor idler drives", "garden and groundcare equipment" ], "failure_modes": [ "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 44.449999999999996 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 30.2 mm s1 dimension is the screw seating geometry inside the 27.2 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Ordering discipline for the 44.449999999999996 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-209-112-2F?", "a": "YAR 209-112-2F measures 44.449999999999996 mm bore x 85 mm OD x 49.2 mm overall width (outer ring 22 mm wide), 1.75 x 3.346 x 1.937 in; mass about 690 g. SKF 17000 ratings: C 33.2 kN, C0 21.6 kN, Pu 0.915 kN, limiting speed 4,300 r/min." }, { "q": "What does the designation YAR 209-112-2F mean?", "a": "the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -112 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 12/16 in = 44.45 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." }, { "q": "How is YAR-209-112-2F lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." } ], "cross_ref": [ { "equiv_sku": "YAR-209-112-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 44.449999999999996x85x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 209-112-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-209-112-2F", "YAR 209-112-2F" ], "locale_variants": {} }, { "sku": "YAT-210-115", "brand": "SKF", "manufacturer_designation": "YAT 210-115", "series": "YAR2-series", "type": "insert", "d_mm": 49.2125, "D_mm": 90, "B_mm": 38.8, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 35.1, "static_load_kN": 23.2, "fatigue_load_limit_kN": 0.98, "limiting_speed_rpm": 4000, "max_rpm": 4000, "weight_g": 650, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YAT 210-115 is SKF's 49.2125 mm-bore grub-screw insert bearing with the inner ring extended on one side in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 49.2125x90x38.8 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAT prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring is extended on one side only. the three-digit -115 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 15/16 in = 49.212 mm (first digit whole inches, next two sixteenths of an inch). this suffix-free execution is listed without the sealed external design: the 38.8 mm width is the one-side-extended inner ring alone, so protection depends on the housing seals and the relubrication routine rather than bearing-mounted contact seals. Envelope 49.2125x90x38.8 mm (1.938x3.543x1.528 in), outer ring 22 mm wide, C 35.1 kN, C0 23.2 kN, Pu 0.98 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,000 r/min; mass 650 g. Width accounting on this execution: 38.8 mm overall and 22 mm outer-ring width leave the housing designer 16.8 mm of inner-ring projection to accommodate the locking arrangement. Load balance for documentation: C0 23.2 kN against C 35.1 kN gives a 0.661 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. The s1 27.6 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Rating split for the maintenance file: dynamic 35.1 kN (L10), static 23.2 kN (s0 shock check), fatigue 0.98 kN (adjusted life) — three separate uses for YAT 210-115, none interchangeable with another. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 49.2125x90 mm insert on its chamfer tilts the whole spherical seat. Single-extension fitting note: with the inner ring extended only on the locking side, orient the open (non-extended) face toward the shaft step or housing shoulder as the drawing shows — reversed, the set screws end up unsupported by the abutment and the shortened side offers no seal land at all. Service tip for YAT-210-115: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 20.394 mm radial section.", "applications": [ "head- and tail-shaft pillow blocks in unit handling", "garden and groundcare equipment", "trough conveyor idler drives" ], "failure_modes": [ "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "The 27.6 mm s1 dimension is the screw seating geometry inside the 16.8 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a one-side YAT insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 49.2125 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 35.1/23.2 kN figures belong specifically to YAT 210-115; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAT-210-115?", "a": "YAT 210-115 measures 49.2125 mm bore x 90 mm OD x 38.8 mm overall width (outer ring 22 mm wide), 1.938 x 3.543 x 1.528 in; mass about 650 g. SKF 17000 ratings: C 35.1 kN, C0 23.2 kN, Pu 0.98 kN, limiting speed 4,000 r/min." }, { "q": "What does the designation YAT 210-115 mean?", "a": "the YAT prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring is extended on one side only. the three-digit -115 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 15/16 in = 49.212 mm (first digit whole inches, next two sixteenths of an inch). this suffix-free execution is listed without the sealed external design: the 38.8 mm width is the one-side-extended inner ring alone, so protection depends on the housing seals and the relubrication routine rather than bearing-mounted contact seals." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAT", "equiv_brand": "ISO 15", "level": "full", "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAT-210-115", "YAT 210-115" ], "locale_variants": {} }, { "sku": "YAR-210-115-2RF-HV", "brand": "SKF", "manufacturer_designation": "YAR 210-115-2RF/HV", "series": "YAR2-series", "type": "insert", "d_mm": 49.2125, "D_mm": 90, "B_mm": 51.6, "material": "SS440C", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 29.6, "static_load_kN": 23.2, "fatigue_load_limit_kN": 0.98, "limiting_speed_rpm": 2200, "max_rpm": 2200, "weight_g": 790, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 210-115-2RF/HV is a SKF insert bearing (Y-bearing) for a 49.2125 mm (1.938 in) shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 90 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -115 decodes as 1\" +15/16, i.e. 49.212 mm; the metric coded size YAR 210 shares the same envelope but its bore is the metric value, not this one. the HV suffix means stainless rings and balls with food-grade compliant seals and grease; capacity is derated versus the carbon-steel part. Envelope 49.2125x90x51.6 mm (1.938x3.543x2.031 in), outer ring 22 mm wide, C 29.6 kN, C0 23.2 kN, Pu 0.98 kN. The catalogue publishes a single speed ceiling, the limiting speed: 2,200 r/min; mass 790 g. At the printed limiting speed of 2,200 r/min the mean diameter dm = 69.606 mm implies dn about 1.53x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Bore-to-OD planning: OD 90 over bore 49.2125 is a 1.829x step, while bore/overall-width gives 0.954; the spherical seat in the matching Y-housing must be specified to the 90 mm OD, not to a cylindrical housing bore. Imperial procurement cross-check: 1.938 in bore, 3.543 in OD, 2.031 in overall width; the 790 g mass converts to 0.790 kg (27.9 oz) for the bill of materials. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 49.2125x90 mm insert on its chamfer tilts the whole spherical seat. Capacity density: 29.6 kN from 0.790 kg of bearing steel is about 37.468 kN per kilogram, and per width millimetre the 51.6 mm unit carries 0.574 kN of dynamic capacity. Stainless food-range note: HV parts trade some capacity for corrosion resistance and food-compatible lubrication, and the printed limiting speed is set for that fill; do not top up with ordinary mineral grease in service — mixing greases can harden the food-grade fill and seize the seals. Service tip for YAR-210-115-2RF-HV: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 20.394 mm radial section.", "applications": [ "trough conveyor idler drives", "ventilation and extraction fans", "small packaging and labelling machines" ], "failure_modes": [ "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "relubricated with incompatible grease that hardens the factory fill and drags the seals" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 49.2125 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 32.6 mm s1 dimension is the screw seating geometry inside the 29.6 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Ordering discipline for the 49.2125 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-210-115-2RF-HV?", "a": "Boundary dimensions: bore 49.2125 mm, sphered OD 90 mm, overall width 51.6 mm; weight 790 g. Loads: dynamic 29.6 kN, static 23.2 kN, fatigue 0.98 kN; the only published speed is the 2,200 r/min limiting value." }, { "q": "What does the designation YAR 210-115-2RF/HV mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -115 decodes as 1\" +15/16, i.e. 49.212 mm; the metric coded size YAR 210 shares the same envelope but its bore is the metric value, not this one. the HV suffix means stainless rings and balls with food-grade compliant seals and grease; capacity is derated versus the carbon-steel part." }, { "q": "How do the set screws lock the 49.2125 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." } ], "cross_ref": [ { "equiv_sku": "YAR-210-115-2RFGR-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 49.2125x90x51.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 210-115-2RFGR/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YARAG-210-115", "equiv_brand": "SKF", "level": "partial", "note": "Same 49.2125x90x51.6 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (29.6/23.2 kN vs 35.1/23.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-210-115-2RF", "equiv_brand": "SKF", "level": "partial", "note": "Same 49.2125x90x51.6 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (29.6/23.2 kN vs 35.1/23.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-210-115-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 49.2125x90x51.6 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (29.6/23.2 kN vs 35.1/23.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-210-115-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 49.2125x90x51.6 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (29.6/23.2 kN vs 35.1/23.2 kN) — envelope match, not a load-rating equivalent." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-210-115-2RF-HV", "YAR 210-115-2RF/HV" ], "locale_variants": {} }, { "sku": "YAR-210-115-2RFGR-HV", "brand": "SKF", "manufacturer_designation": "YAR 210-115-2RFGR/HV", "series": "YAR2-series", "type": "insert", "d_mm": 49.2125, "D_mm": 90, "B_mm": 51.6, "material": "SS440C", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 29.6, "static_load_kN": 23.2, "fatigue_load_limit_kN": 0.98, "limiting_speed_rpm": 2200, "max_rpm": 2200, "weight_g": 790, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 210-115-2RFGR/HV is a SKF insert bearing (Y-bearing) for a 49.2125 mm (1.938 in) shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 90 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -115 decodes as 1\" +15/16, i.e. 49.212 mm; the metric coded size YAR 210 shares the same envelope but its bore is the metric value, not this one. the HV suffix means stainless rings and balls with food-grade compliant seals and grease (this article also carries the GR outside-surface lubrication groove); capacity is derated versus the carbon-steel part. Envelope 49.2125x90x51.6 mm (1.938x3.543x2.031 in), outer ring 22 mm wide, C 29.6 kN, C0 23.2 kN, Pu 0.98 kN. The catalogue publishes a single speed ceiling, the limiting speed: 2,200 r/min; mass 790 g. Bore-to-OD planning: OD 90 over bore 49.2125 is a 1.829x step, while bore/overall-width gives 0.954; the spherical seat in the matching Y-housing must be specified to the 90 mm OD, not to a cylindrical housing bore. Rating split for the maintenance file: dynamic 29.6 kN (L10), static 23.2 kN (s0 shock check), fatigue 0.98 kN (adjusted life) — three separate uses for YAR 210-115-2RFGR/HV, none interchangeable with another. Spherical-seat note in numbers: the 90 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 69.606 = 218.674 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Mass-to-load ratio for YAR-210-115-2RFGR-HV: 26.689 g of catalogue mass per rated kN of C, and 16.053 g per millimetre of bore — useful when comparing executions of the same 49.2125x90 mm envelope on the drawing. Width accounting on this execution: 51.6 mm overall and 22 mm outer-ring width leave the housing designer 29.6 mm of inner-ring projection to accommodate the locking arrangement. Stainless food-range note: HV parts trade some capacity for corrosion resistance and food-compatible lubrication, and the printed limiting speed is set for that fill; do not top up with ordinary mineral grease in service — mixing greases can harden the food-grade fill and seize the seals. Service tip for YAR-210-115-2RFGR-HV: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 20.394 mm radial section.", "applications": [ "head- and tail-shaft pillow blocks in unit handling", "ventilation and extraction fans", "trough conveyor idler drives" ], "failure_modes": [ "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "Do not specify the 49.2125 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 32.6 mm s1 dimension is the screw seating geometry inside the 29.6 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Catalogue ratings belong to YAR 210-115-2RFGR/HV as the grub two hv execution; other order numbers of the YAR 210-115 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-210-115-2RFGR-HV?", "a": "Boundary dimensions: bore 49.2125 mm, sphered OD 90 mm, overall width 51.6 mm; weight 790 g. Loads: dynamic 29.6 kN, static 23.2 kN, fatigue 0.98 kN; the only published speed is the 2,200 r/min limiting value." }, { "q": "What does the designation YAR 210-115-2RFGR/HV mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -115 decodes as 1\" +15/16, i.e. 49.212 mm; the metric coded size YAR 210 shares the same envelope but its bore is the metric value, not this one. the HV suffix means stainless rings and balls with food-grade compliant seals and grease (this article also carries the GR outside-surface lubrication groove); capacity is derated versus the carbon-steel part." }, { "q": "How do the set screws lock the 49.2125 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." } ], "cross_ref": [ { "equiv_sku": "YAR-210-115-2RF-HV", "equiv_brand": "SKF", "level": "full", "note": "Same 49.2125x90x51.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 210-115-2RF/HV is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YARAG-210-115", "equiv_brand": "SKF", "level": "partial", "note": "Same 49.2125x90x51.6 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (29.6/23.2 kN vs 35.1/23.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-210-115-2RF", "equiv_brand": "SKF", "level": "partial", "note": "Same 49.2125x90x51.6 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (29.6/23.2 kN vs 35.1/23.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-210-115-2RF-VE495", "equiv_brand": "SKF", "level": "partial", "note": "Same 49.2125x90x51.6 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (29.6/23.2 kN vs 35.1/23.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-210-115-2F", "equiv_brand": "SKF", "level": "partial", "note": "Same 49.2125x90x51.6 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (29.6/23.2 kN vs 35.1/23.2 kN) — envelope match, not a load-rating equivalent." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-210-115-2RFGR-HV", "YAR 210-115-2RFGR/HV" ], "locale_variants": {} }, { "sku": "YARAG-210-115", "brand": "SKF", "manufacturer_designation": "YARAG 210-115", "series": "YAR2-series", "type": "insert", "d_mm": 49.2125, "D_mm": 90, "B_mm": 51.6, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 35.1, "static_load_kN": 23.2, "fatigue_load_limit_kN": 0.98, "limiting_speed_rpm": 800, "max_rpm": 800, "weight_g": 770, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YARAG 210-115 is a grub-screw insert bearing with the inner ring extended on both sides, 49.2125x90x51.6 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -115 = 49.212 mm, which is why this row sits beside, not on, the metric bore size. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery. Envelope 49.2125x90x51.6 mm (1.938x3.543x2.031 in), outer ring 22 mm wide, C 35.1 kN, C0 23.2 kN, Pu 0.98 kN. The catalogue publishes a single speed ceiling, the limiting speed: 800 r/min; mass 770 g. Rating split for the maintenance file: dynamic 35.1 kN (L10), static 23.2 kN (s0 shock check), fatigue 0.98 kN (adjusted life) — three separate uses for YARAG 210-115, none interchangeable with another. The s1 32.6 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Bore-to-OD planning: OD 90 over bore 49.2125 is a 1.829x step, while bore/overall-width gives 0.954; the spherical seat in the matching Y-housing must be specified to the 90 mm OD, not to a cylindrical housing bore. Static-first planning: the 0.45 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 49.2125 mm shaft, not the 35.1 kN L10 value. Spherical-seat note in numbers: the 90 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 69.606 = 218.674 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Service tip for YARAG-210-115: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 20.394 mm radial section.", "applications": [ "small packaging and labelling machines", "ventilation and extraction fans", "trough conveyor idler drives" ], "failure_modes": [ "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "The 32.6 mm s1 dimension is the screw seating geometry inside the 29.6 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 49.2125 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 35.1/23.2 kN figures belong specifically to YARAG 210-115; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YARAG-210-115?", "a": "The catalogue envelope is 49.2125x90x51.6 mm with a spherical outside surface; mass 770 g. Ratings C 35.1/23.2 kN, Pu 0.98 kN, limiting speed 800 r/min." }, { "q": "What does the designation YARAG 210-115 mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -115 = 49.212 mm, which is why this row sits beside, not on, the metric bore size. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery." }, { "q": "How do the set screws lock the 49.2125 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." } ], "cross_ref": [ { "equiv_sku": "YAR-210-115-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 49.2125x90x51.6 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (35.1/23.2 kN vs 29.6/23.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-210-115-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 49.2125x90x51.6 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (35.1/23.2 kN vs 29.6/23.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-210-115-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 49.2125x90x51.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 210-115-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-210-115-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 49.2125x90x51.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 210-115-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-210-115-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 49.2125x90x51.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 210-115-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YARAG-210-115", "YARAG 210-115" ], "locale_variants": {} }, { "sku": "YAR-210-115-2RF", "brand": "SKF", "manufacturer_designation": "YAR 210-115-2RF", "series": "YAR2-series", "type": "insert", "d_mm": 49.2125, "D_mm": 90, "B_mm": 51.6, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 35.1, "static_load_kN": 23.2, "fatigue_load_limit_kN": 0.98, "limiting_speed_rpm": 2200, "max_rpm": 2200, "weight_g": 790, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YAR 210-115-2RF is SKF's 49.2125 mm-bore grub-screw insert bearing with the inner ring extended on both sides in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 49.2125x90x51.6 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -115 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 15/16 in = 49.212 mm (first digit whole inches, next two sixteenths of an inch). suffix -2RF upgrades the -2F package with a RUBBERIZED flinger on each side — the coated thrower closes the radial gap against fine dust and slurry better than the plain steel flinger of -2F. Envelope 49.2125x90x51.6 mm (1.938x3.543x2.031 in), outer ring 22 mm wide, C 35.1 kN, C0 23.2 kN, Pu 0.98 kN. The catalogue publishes a single speed ceiling, the limiting speed: 2,200 r/min; mass 790 g. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 49.2125x90 mm insert on its chamfer tilts the whole spherical seat. Capacity density: 35.1 kN from 0.790 kg of bearing steel is about 44.43 kN per kilogram, and per width millimetre the 51.6 mm unit carries 0.68 kN of dynamic capacity. Bore-to-OD planning: OD 90 over bore 49.2125 is a 1.829x step, while bore/overall-width gives 0.954; the spherical seat in the matching Y-housing must be specified to the 90 mm OD, not to a cylindrical housing bore. Rating split for the maintenance file: dynamic 35.1 kN (L10), static 23.2 kN (s0 shock check), fatigue 0.98 kN (adjusted life) — three separate uses for YAR 210-115-2RF, none interchangeable with another. Static-first planning: the 0.45 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 49.2125 mm shaft, not the 35.1 kN L10 value. Rubberized-flinger note: the -2RF coated throwers are vulcanized assemblies — never lever or hammer against the flinger when mounting, and press only on the inner ring when the bearing is fitted loose before the housing cap closes, or the flinger lip folds inward and grinds on the inner ring. Service tip for YAR-210-115-2RF: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 20.394 mm radial section.", "applications": [ "trough conveyor idler drives", "ventilation and extraction fans", "small packaging and labelling machines" ], "failure_modes": [ "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 32.6 mm s1 dimension is the screw seating geometry inside the 29.6 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 49.2125 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Ordering discipline for the 49.2125 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-210-115-2RF?", "a": "YAR 210-115-2RF measures 49.2125 mm bore x 90 mm OD x 51.6 mm overall width (outer ring 22 mm wide), 1.938 x 3.543 x 2.031 in; mass about 790 g. SKF 17000 ratings: C 35.1 kN, C0 23.2 kN, Pu 0.98 kN, limiting speed 2,200 r/min." }, { "q": "What does the designation YAR 210-115-2RF mean?", "a": "the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -115 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 15/16 in = 49.212 mm (first digit whole inches, next two sixteenths of an inch). suffix -2RF upgrades the -2F package with a RUBBERIZED flinger on each side — the coated thrower closes the radial gap against fine dust and slurry better than the plain steel flinger of -2F." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." }, { "q": "How is YAR-210-115-2RF lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." } ], "cross_ref": [ { "equiv_sku": "YAR-210-115-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 49.2125x90x51.6 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (35.1/23.2 kN vs 29.6/23.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-210-115-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 49.2125x90x51.6 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (35.1/23.2 kN vs 29.6/23.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YARAG-210-115", "equiv_brand": "SKF", "level": "full", "note": "Same 49.2125x90x51.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 210-115 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-210-115-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 49.2125x90x51.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 210-115-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-210-115-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 49.2125x90x51.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 210-115-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-210-115-2RF", "YAR 210-115-2RF" ], "locale_variants": {} }, { "sku": "YAR-210-115-2RF-VE495", "brand": "SKF", "manufacturer_designation": "YAR 210-115-2RF/VE495", "series": "YAR2-series", "type": "insert", "d_mm": 49.2125, "D_mm": 90, "B_mm": 51.6, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 35.1, "static_load_kN": 23.2, "fatigue_load_limit_kN": 0.98, "limiting_speed_rpm": 2200, "max_rpm": 2200, "weight_g": 790, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YAR 210-115-2RF/VE495 is SKF's 49.2125 mm-bore grub-screw insert bearing with the inner ring extended on both sides in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 49.2125x90x51.6 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -115 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 15/16 in = 49.212 mm (first digit whole inches, next two sixteenths of an inch). /VE495 is the zinc-plated food-industry execution: zinc-coated inner and outer rings, seals and flingers with stainless-steel inserts in food-compatible rubber, and food-grade grease fill. Envelope 49.2125x90x51.6 mm (1.938x3.543x2.031 in), outer ring 22 mm wide, C 35.1 kN, C0 23.2 kN, Pu 0.98 kN. The catalogue publishes a single speed ceiling, the limiting speed: 2,200 r/min; mass 790 g. Mass-to-load ratio for YAR-210-115-2RF-VE495: 22.507 g of catalogue mass per rated kN of C, and 16.053 g per millimetre of bore — useful when comparing executions of the same 49.2125x90 mm envelope on the drawing. Imperial procurement cross-check: 1.938 in bore, 3.543 in OD, 2.031 in overall width; the 790 g mass converts to 0.790 kg (27.9 oz) for the bill of materials. At the printed limiting speed of 2,200 r/min the mean diameter dm = 69.606 mm implies dn about 1.53x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Bore-to-OD planning: OD 90 over bore 49.2125 is a 1.829x step, while bore/overall-width gives 0.954; the spherical seat in the matching Y-housing must be specified to the 90 mm OD, not to a cylindrical housing bore. Speed ceiling of 2,200 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Zinc-coated food-range note: the VE495 plating is a functional surface, not cosmetic; clean the bore and shaft WITHOUT steel brushes or aggressive descalers, mount dry or with the approved food-grade mounting paste, and touch up damaged plating spots before commissioning the wash-down area. Set-screw geometry on this size: the two 120 deg screws bear on the 49.2125 mm shaft inside the 51.6 mm total width while the outer ring is only 22 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "garden and groundcare equipment", "head- and tail-shaft pillow blocks in unit handling", "trough conveyor idler drives" ], "failure_modes": [ "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "Do not specify the 49.2125 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 32.6 mm s1 dimension is the screw seating geometry inside the 29.6 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Catalogue ratings belong to YAR 210-115-2RF/VE495 as the grub two ve495 execution; other order numbers of the YAR 210-115 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-210-115-2RF-VE495?", "a": "YAR 210-115-2RF/VE495 measures 49.2125 mm bore x 90 mm OD x 51.6 mm overall width (outer ring 22 mm wide), 1.938 x 3.543 x 2.031 in; mass about 790 g. SKF 17000 ratings: C 35.1 kN, C0 23.2 kN, Pu 0.98 kN, limiting speed 2,200 r/min." }, { "q": "What does the designation YAR 210-115-2RF/VE495 mean?", "a": "the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -115 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 15/16 in = 49.212 mm (first digit whole inches, next two sixteenths of an inch). /VE495 is the zinc-plated food-industry execution: zinc-coated inner and outer rings, seals and flingers with stainless-steel inserts in food-compatible rubber, and food-grade grease fill." }, { "q": "How is YAR-210-115-2RF-VE495 lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." }, { "q": "How do the set screws lock the 49.2125 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." } ], "cross_ref": [ { "equiv_sku": "YAR-210-115-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 49.2125x90x51.6 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (35.1/23.2 kN vs 29.6/23.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-210-115-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 49.2125x90x51.6 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (35.1/23.2 kN vs 29.6/23.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YARAG-210-115", "equiv_brand": "SKF", "level": "full", "note": "Same 49.2125x90x51.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 210-115 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-210-115-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 49.2125x90x51.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 210-115-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-210-115-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 49.2125x90x51.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 210-115-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-210-115-2RF-VE495", "YAR 210-115-2RF/VE495" ], "locale_variants": {} }, { "sku": "YAR-210-115-2F", "brand": "SKF", "manufacturer_designation": "YAR 210-115-2F", "series": "YAR2-series", "type": "insert", "d_mm": 49.2125, "D_mm": 90, "B_mm": 51.6, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 35.1, "static_load_kN": 23.2, "fatigue_load_limit_kN": 0.98, "limiting_speed_rpm": 4000, "max_rpm": 4000, "weight_g": 790, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YAR 210-115-2F is SKF's 49.2125 mm-bore grub-screw insert bearing with the inner ring extended on both sides in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 49.2125x90x51.6 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -115 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 15/16 in = 49.212 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 49.2125x90x51.6 mm (1.938x3.543x2.031 in), outer ring 22 mm wide, C 35.1 kN, C0 23.2 kN, Pu 0.98 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,000 r/min; mass 790 g. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 62.5 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the plain flinger. Width accounting on this execution: 51.6 mm overall and 22 mm outer-ring width leave the housing designer 29.6 mm of inner-ring projection to accommodate the locking arrangement. Speed ceiling of 4,000 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Static-first planning: the 0.45 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 49.2125 mm shaft, not the 35.1 kN L10 value. Selection figures for YAR 210-115-2F: C0/C is 0.661, Pu 0.98 kN is 2.792 % of the 35.1 kN dynamic rating, and the 790 g catalogue mass works out to roughly 16.053 g per millimetre of the 49.2125 mm bore. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Set-screw geometry on this size: the two 120 deg screws bear on the 49.2125 mm shaft inside the 51.6 mm total width while the outer ring is only 22 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "small packaging and labelling machines", "head- and tail-shaft pillow blocks in unit handling", "garden and groundcare equipment" ], "failure_modes": [ "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 32.6 mm s1 dimension is the screw seating geometry inside the 29.6 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 49.2125 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Ordering discipline for the 49.2125 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-210-115-2F?", "a": "YAR 210-115-2F measures 49.2125 mm bore x 90 mm OD x 51.6 mm overall width (outer ring 22 mm wide), 1.938 x 3.543 x 2.031 in; mass about 790 g. SKF 17000 ratings: C 35.1 kN, C0 23.2 kN, Pu 0.98 kN, limiting speed 4,000 r/min." }, { "q": "What does the designation YAR 210-115-2F mean?", "a": "the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -115 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 15/16 in = 49.212 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." } ], "cross_ref": [ { "equiv_sku": "YAR-210-115-2RF-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 49.2125x90x51.6 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (35.1/23.2 kN vs 29.6/23.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YAR-210-115-2RFGR-HV", "equiv_brand": "SKF", "level": "partial", "note": "Same 49.2125x90x51.6 mm ISO 15 insert-bearing envelope, but catalogue C/C0 differ between executions (35.1/23.2 kN vs 29.6/23.2 kN) — envelope match, not a load-rating equivalent." }, { "equiv_sku": "YARAG-210-115", "equiv_brand": "SKF", "level": "full", "note": "Same 49.2125x90x51.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YARAG 210-115 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-210-115-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 49.2125x90x51.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 210-115-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-210-115-2RF-VE495", "equiv_brand": "SKF", "level": "full", "note": "Same 49.2125x90x51.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 210-115-2RF/VE495 is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-210-115-2F", "YAR 210-115-2F" ], "locale_variants": {} }, { "sku": "YAT-211-200", "brand": "SKF", "manufacturer_designation": "YAT 211-200", "series": "YAR2-series", "type": "insert", "d_mm": 50.8, "D_mm": 100, "B_mm": 45, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 43.6, "static_load_kN": 29, "fatigue_load_limit_kN": 1.25, "limiting_speed_rpm": 3600, "max_rpm": 3600, "weight_g": 1000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAT 211-200 is a SKF insert bearing (Y-bearing) for a 50.8 mm (2 in) shaft: grub-screw insert bearing with the inner ring extended on one side, built to the ISO 15 diameter-series envelope with a sphered OD of 100 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAT basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAT carries the one-side-extended inner ring. inch bore code -200 decodes as 2\", i.e. 50.8 mm; the metric coded size YAT 211 shares the same envelope but its bore is the metric value, not this one. with no -2F/-2RF suffix the order number denotes the open external execution of the YAR2 size — add external exclusion at the housing and plan relubrication intervals for dusty or wet surroundings. Envelope 50.8x100x45 mm (2x3.937x1.772 in), outer ring 25 mm wide, C 43.6 kN, C0 29 kN, Pu 1.25 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,600 r/min; mass 1000 g. The s1 32.5 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Spherical-seat note in numbers: the 100 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 75.4 = 236.876 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Capacity density: 43.6 kN from 1.000 kg of bearing steel is about 43.6 kN per kilogram, and per width millimetre the 45 mm unit carries 0.969 kN of dynamic capacity. Pitch-diameter arithmetic: dm = (50.8+100)/2 = 75.4 mm; at the 3,600 r/min limiting speed the ball set runs at dn approx 2.71x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Bore-to-OD planning: OD 100 over bore 50.8 is a 1.969x step, while bore/overall-width gives 1.129; the spherical seat in the matching Y-housing must be specified to the 100 mm OD, not to a cylindrical housing bore. Single-extension fitting note: with the inner ring extended only on the locking side, orient the open (non-extended) face toward the shaft step or housing shoulder as the drawing shows — reversed, the set screws end up unsupported by the abutment and the shortened side offers no seal land at all. Set-screw geometry on this size: the two 120 deg screws bear on the 50.8 mm shaft inside the 45 mm total width while the outer ring is only 25 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "ventilation and extraction fans", "trough conveyor idler drives", "small packaging and labelling machines" ], "failure_modes": [ "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "relubricated with incompatible grease that hardens the factory fill and drags the seals" ], "pitfalls": [ "The 32.5 mm s1 dimension is the screw seating geometry inside the 20 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a one-side YAT insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 50.8 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 43.6/29 kN figures belong specifically to YAT 211-200; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAT-211-200?", "a": "Boundary dimensions: bore 50.8 mm, sphered OD 100 mm, overall width 45 mm; weight 1000 g. Loads: dynamic 43.6 kN, static 29 kN, fatigue 1.25 kN; the only published speed is the 3,600 r/min limiting value." }, { "q": "What does the designation YAT 211-200 mean?", "a": "reading the YAT basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAT carries the one-side-extended inner ring. inch bore code -200 decodes as 2\", i.e. 50.8 mm; the metric coded size YAT 211 shares the same envelope but its bore is the metric value, not this one. with no -2F/-2RF suffix the order number denotes the open external execution of the YAR2 size — add external exclusion at the housing and plan relubrication intervals for dusty or wet surroundings." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." }, { "q": "How is YAT-211-200 lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." } ], "cross_ref": [ { "equiv_sku": "YAT", "equiv_brand": "ISO 15", "level": "full", "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAT-211-200", "YAT 211-200" ], "locale_variants": {} }, { "sku": "YAR-211-200-2RF", "brand": "SKF", "manufacturer_designation": "YAR 211-200-2RF", "series": "YAR2-series", "type": "insert", "d_mm": 50.8, "D_mm": 100, "B_mm": 55.6, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 43.6, "static_load_kN": 29, "fatigue_load_limit_kN": 1.25, "limiting_speed_rpm": 1900, "max_rpm": 1900, "weight_g": 1200, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 211-200-2RF is a SKF insert bearing (Y-bearing) for a 50.8 mm (2 in) shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 100 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -200 decodes as 2\", i.e. 50.8 mm; the metric coded size YAR 211 shares the same envelope but its bore is the metric value, not this one. -2RF means an NBR contact lip plus a rubber-coated flinger at both sides, the catalogue step above -2F for wet, abrasive or washed-down environments. Envelope 50.8x100x55.6 mm (2x3.937x2.189 in), outer ring 25 mm wide, C 43.6 kN, C0 29 kN, Pu 1.25 kN. The catalogue publishes a single speed ceiling, the limiting speed: 1,900 r/min; mass 1200 g. Imperial procurement cross-check: 2 in bore, 3.937 in OD, 2.189 in overall width; the 1200 g mass converts to 1.200 kg (42.3 oz) for the bill of materials. Width accounting on this execution: 55.6 mm overall and 25 mm outer-ring width leave the housing designer 30.6 mm of inner-ring projection to accommodate the locking arrangement. Load balance for documentation: C0 29 kN against C 43.6 kN gives a 0.665 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Pitch-diameter arithmetic: dm = (50.8+100)/2 = 75.4 mm; at the 1,900 r/min limiting speed the ball set runs at dn approx 1.43x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Fatigue-limit check: Pu 1.25 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YAR 211-200-2RF — most belt-driven mounted-unit loads sit comfortably under 2.867 % of C. Rubberized-flinger note: the -2RF coated throwers are vulcanized assemblies — never lever or hammer against the flinger when mounting, and press only on the inner ring when the bearing is fitted loose before the housing cap closes, or the flinger lip folds inward and grinds on the inner ring. Service tip for YAR-211-200-2RF: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 24.6 mm radial section.", "applications": [ "ventilation and extraction fans", "small packaging and labelling machines", "head- and tail-shaft pillow blocks in unit handling" ], "failure_modes": [ "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "The 33.4 mm s1 dimension is the screw seating geometry inside the 30.6 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 50.8 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 43.6/29 kN figures belong specifically to YAR 211-200-2RF; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-211-200-2RF?", "a": "Boundary dimensions: bore 50.8 mm, sphered OD 100 mm, overall width 55.6 mm; weight 1200 g. Loads: dynamic 43.6 kN, static 29 kN, fatigue 1.25 kN; the only published speed is the 1,900 r/min limiting value." }, { "q": "What does the designation YAR 211-200-2RF mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -200 decodes as 2\", i.e. 50.8 mm; the metric coded size YAR 211 shares the same envelope but its bore is the metric value, not this one. -2RF means an NBR contact lip plus a rubber-coated flinger at both sides, the catalogue step above -2F for wet, abrasive or washed-down environments." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." } ], "cross_ref": [ { "equiv_sku": "YAR-211-200-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 50.8x100x55.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 211-200-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YEL-211-200-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 50.8x100x55.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 211-200-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-211-200-2RF", "YAR 211-200-2RF" ], "locale_variants": {} }, { "sku": "YAR-211-200-2F", "brand": "SKF", "manufacturer_designation": "YAR 211-200-2F", "series": "YAR2-series", "type": "insert", "d_mm": 50.8, "D_mm": 100, "B_mm": 55.6, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 43.6, "static_load_kN": 29, "fatigue_load_limit_kN": 1.25, "limiting_speed_rpm": 3600, "max_rpm": 3600, "weight_g": 1200, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YAR 211-200-2F is SKF's 50.8 mm-bore grub-screw insert bearing with the inner ring extended on both sides in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 50.8x100x55.6 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -200 tail codes the bore in inches for inch-shaft bearings: 2 whole inch = 50.8 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 50.8x100x55.6 mm (2x3.937x2.189 in), outer ring 25 mm wide, C 43.6 kN, C0 29 kN, Pu 1.25 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,600 r/min; mass 1200 g. At the printed limiting speed of 3,600 r/min the mean diameter dm = 75.4 mm implies dn about 2.71x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Speed ceiling of 3,600 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Outer-vs-overall width: the outer ring is 25 mm wide inside the 55.6 mm total, so the extended inner ring accounts for 0.55 of the overall width (15.3 mm of axial projection per side). Load balance for documentation: C0 29 kN against C 43.6 kN gives a 0.665 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Spherical-seat note in numbers: the 100 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 75.4 = 236.876 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Set-screw geometry on this size: the two 120 deg screws bear on the 50.8 mm shaft inside the 55.6 mm total width while the outer ring is only 25 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "head- and tail-shaft pillow blocks in unit handling", "ventilation and extraction fans", "garden and groundcare equipment" ], "failure_modes": [ "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "The 33.4 mm s1 dimension is the screw seating geometry inside the 30.6 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 50.8 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 43.6/29 kN figures belong specifically to YAR 211-200-2F; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-211-200-2F?", "a": "YAR 211-200-2F measures 50.8 mm bore x 100 mm OD x 55.6 mm overall width (outer ring 25 mm wide), 2 x 3.937 x 2.189 in; mass about 1200 g. SKF 17000 ratings: C 43.6 kN, C0 29 kN, Pu 1.25 kN, limiting speed 3,600 r/min." }, { "q": "What does the designation YAR 211-200-2F mean?", "a": "the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -200 tail codes the bore in inches for inch-shaft bearings: 2 whole inch = 50.8 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "How is YAR-211-200-2F lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." }, { "q": "How do the set screws lock the 50.8 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." } ], "cross_ref": [ { "equiv_sku": "YAR-211-200-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 50.8x100x55.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 211-200-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YEL-211-200-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 50.8x100x55.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 211-200-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-211-200-2F", "YAR 211-200-2F" ], "locale_variants": {} }, { "sku": "YAR-211-203-2F", "brand": "SKF", "manufacturer_designation": "YAR 211-203-2F", "series": "YAR2-series", "type": "insert", "d_mm": 55.5625, "D_mm": 100, "B_mm": 55.6, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 43.6, "static_load_kN": 29, "fatigue_load_limit_kN": 1.25, "limiting_speed_rpm": 3600, "max_rpm": 3600, "weight_g": 1000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 211-203-2F is a SKF insert bearing (Y-bearing) for a 55.5625 mm (2.188 in) shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 100 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -203 decodes as 2\" +3/16, i.e. 55.563 mm; the metric coded size YAR 211 shares the same envelope but its bore is the metric value, not this one. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 55.5625x100x55.6 mm (2.188x3.937x2.189 in), outer ring 25 mm wide, C 43.6 kN, C0 29 kN, Pu 1.25 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,600 r/min; mass 1000 g. Imperial procurement cross-check: 2.188 in bore, 3.937 in OD, 2.189 in overall width; the 1000 g mass converts to 1.000 kg (35.3 oz) for the bill of materials. Pitch-diameter arithmetic: dm = (55.5625+100)/2 = 77.781 mm; at the 3,600 r/min limiting speed the ball set runs at dn approx 2.80x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Fatigue-limit check: Pu 1.25 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YAR 211-203-2F — most belt-driven mounted-unit loads sit comfortably under 2.867 % of C. Bore-to-OD planning: OD 100 over bore 55.5625 is a 1.8x step, while bore/overall-width gives 0.999; the spherical seat in the matching Y-housing must be specified to the 100 mm OD, not to a cylindrical housing bore. Load balance for documentation: C0 29 kN against C 43.6 kN gives a 0.665 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Set-screw geometry on this size: the two 120 deg screws bear on the 55.5625 mm shaft inside the 55.6 mm total width while the outer ring is only 25 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "bulk-handling conveyor drives", "heavy fan and heater units", "agricultural harvesting machinery" ], "failure_modes": [ "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "relubricated with incompatible grease that hardens the factory fill and drags the seals" ], "pitfalls": [ "The 33.4 mm s1 dimension is the screw seating geometry inside the 30.6 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 55.5625 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 43.6/29 kN figures belong specifically to YAR 211-203-2F; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-211-203-2F?", "a": "Boundary dimensions: bore 55.5625 mm, sphered OD 100 mm, overall width 55.6 mm; weight 1000 g. Loads: dynamic 43.6 kN, static 29 kN, fatigue 1.25 kN; the only published speed is the 3,600 r/min limiting value." }, { "q": "What does the designation YAR 211-203-2F mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -203 decodes as 2\" +3/16, i.e. 55.563 mm; the metric coded size YAR 211 shares the same envelope but its bore is the metric value, not this one. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." }, { "q": "How is YAR-211-203-2F lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." } ], "cross_ref": [ { "equiv_sku": "YEL-211-203-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 55.5625x100x55.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 211-203-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-211-203-2F", "YAR 211-203-2F" ], "locale_variants": {} }, { "sku": "YAR-212-203-2F", "brand": "SKF", "manufacturer_designation": "YAR 212-203-2F", "series": "YAR2-series", "type": "insert", "d_mm": 55.5625, "D_mm": 110, "B_mm": 65.1, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 52.7, "static_load_kN": 36, "fatigue_load_limit_kN": 1.53, "limiting_speed_rpm": 3400, "max_rpm": 3400, "weight_g": 1600, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 212-203-2F is a SKF insert bearing (Y-bearing) for a 55.5625 mm (2.188 in) shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 110 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -203 decodes as 2\" +3/16, i.e. 55.563 mm; the metric coded size YAR 212 shares the same envelope but its bore is the metric value, not this one. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 55.5625x110x65.1 mm (2.188x4.331x2.563 in), outer ring 26 mm wide, C 52.7 kN, C0 36 kN, Pu 1.53 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,400 r/min; mass 1600 g. Grease-life arithmetic is dominated by speed: at dn approx 2.81x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Outer-vs-overall width: the outer ring is 26 mm wide inside the 65.1 mm total, so the extended inner ring accounts for 0.601 of the overall width (19.55 mm of axial projection per side). Selection figures for YAR 212-203-2F: C0/C is 0.683, Pu 1.53 kN is 2.903 % of the 52.7 kN dynamic rating, and the 1600 g catalogue mass works out to roughly 28.796 g per millimetre of the 55.5625 mm bore. Load balance for documentation: C0 36 kN against C 52.7 kN gives a 0.683 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Imperial procurement cross-check: 2.188 in bore, 4.331 in OD, 2.563 in overall width; the 1600 g mass converts to 1.600 kg (56.4 oz) for the bill of materials. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Set-screw geometry on this size: the two 120 deg screws bear on the 55.5625 mm shaft inside the 65.1 mm total width while the outer ring is only 26 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "agricultural harvesting machinery", "heavy fan and heater units", "crusher and screen auxiliary shafts" ], "failure_modes": [ "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "relubricated with incompatible grease that hardens the factory fill and drags the seals" ], "pitfalls": [ "Do not specify the 55.5625 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 39.7 mm s1 dimension is the screw seating geometry inside the 39.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Catalogue ratings belong to YAR 212-203-2F as the grub two f execution; other order numbers of the YAR 212-203 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-212-203-2F?", "a": "Boundary dimensions: bore 55.5625 mm, sphered OD 110 mm, overall width 65.1 mm; weight 1600 g. Loads: dynamic 52.7 kN, static 36 kN, fatigue 1.53 kN; the only published speed is the 3,400 r/min limiting value." }, { "q": "What does the designation YAR 212-203-2F mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -203 decodes as 2\" +3/16, i.e. 55.563 mm; the metric coded size YAR 212 shares the same envelope but its bore is the metric value, not this one. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAR", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-212-203-2F", "YAR 212-203-2F" ], "locale_variants": {} }, { "sku": "YAT-212-204", "brand": "SKF", "manufacturer_designation": "YAT 212-204", "series": "YAR2-series", "type": "insert", "d_mm": 57.15, "D_mm": 110, "B_mm": 48.5, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 52.7, "static_load_kN": 36, "fatigue_load_limit_kN": 1.53, "limiting_speed_rpm": 3400, "max_rpm": 3400, "weight_g": 1250, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YAT 212-204 is SKF's 57.15 mm-bore grub-screw insert bearing with the inner ring extended on one side in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 57.15x110x48.5 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAT prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring is extended on one side only. the three-digit -204 tail codes the bore in inches for inch-shaft bearings: 2 whole inch 4/16 in = 57.15 mm (first digit whole inches, next two sixteenths of an inch). this suffix-free execution is listed without the sealed external design: the 48.5 mm width is the one-side-extended inner ring alone, so protection depends on the housing seals and the relubrication routine rather than bearing-mounted contact seals. Envelope 57.15x110x48.5 mm (2.25x4.331x1.909 in), outer ring 26 mm wide, C 52.7 kN, C0 36 kN, Pu 1.53 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,400 r/min; mass 1250 g. At the printed limiting speed of 3,400 r/min the mean diameter dm = 83.575 mm implies dn about 2.84x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Fatigue-limit check: Pu 1.53 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YAT 212-204 — most belt-driven mounted-unit loads sit comfortably under 2.903 % of C. Grease-life arithmetic is dominated by speed: at dn approx 2.84x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Spherical-seat note in numbers: the 110 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 83.575 = 262.559 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Mass-to-load ratio for YAT-212-204: 23.719 g of catalogue mass per rated kN of C, and 21.872 g per millimetre of bore — useful when comparing executions of the same 57.15x110 mm envelope on the drawing. Single-extension fitting note: with the inner ring extended only on the locking side, orient the open (non-extended) face toward the shaft step or housing shoulder as the drawing shows — reversed, the set screws end up unsupported by the abutment and the shortened side offers no seal land at all. Set-screw geometry on this size: the two 120 deg screws bear on the 57.15 mm shaft inside the 48.5 mm total width while the outer ring is only 26 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "agricultural harvesting machinery", "crusher and screen auxiliary shafts", "heavy fan and heater units" ], "failure_modes": [ "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "Do not specify the 57.15 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 35 mm s1 dimension is the screw seating geometry inside the 22.5 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a one-side YAT insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Catalogue ratings belong to YAT 212-204 as the grub one open execution; other order numbers of the YAT 212-204 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAT-212-204?", "a": "YAT 212-204 measures 57.15 mm bore x 110 mm OD x 48.5 mm overall width (outer ring 26 mm wide), 2.25 x 4.331 x 1.909 in; mass about 1250 g. SKF 17000 ratings: C 52.7 kN, C0 36 kN, Pu 1.53 kN, limiting speed 3,400 r/min." }, { "q": "What does the designation YAT 212-204 mean?", "a": "the YAT prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring is extended on one side only. the three-digit -204 tail codes the bore in inches for inch-shaft bearings: 2 whole inch 4/16 in = 57.15 mm (first digit whole inches, next two sixteenths of an inch). this suffix-free execution is listed without the sealed external design: the 48.5 mm width is the one-side-extended inner ring alone, so protection depends on the housing seals and the relubrication routine rather than bearing-mounted contact seals." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." } ], "cross_ref": [ { "equiv_sku": "YAT", "equiv_brand": "ISO 15", "level": "full", "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAT-212-204", "YAT 212-204" ], "locale_variants": {} }, { "sku": "YAR-212-204-2F", "brand": "SKF", "manufacturer_designation": "YAR 212-204-2F", "series": "YAR2-series", "type": "insert", "d_mm": 57.15, "D_mm": 110, "B_mm": 65.1, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 52.7, "static_load_kN": 36, "fatigue_load_limit_kN": 1.53, "limiting_speed_rpm": 3400, "max_rpm": 3400, "weight_g": 1550, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YAR 212-204-2F is SKF's 57.15 mm-bore grub-screw insert bearing with the inner ring extended on both sides in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 57.15x110x65.1 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -204 tail codes the bore in inches for inch-shaft bearings: 2 whole inch 4/16 in = 57.15 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 57.15x110x65.1 mm (2.25x4.331x2.563 in), outer ring 26 mm wide, C 52.7 kN, C0 36 kN, Pu 1.53 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,400 r/min; mass 1550 g. Outer-vs-overall width: the outer ring is 26 mm wide inside the 65.1 mm total, so the extended inner ring accounts for 0.601 of the overall width (19.55 mm of axial projection per side). Envelope arithmetic: the radial section from 57.15 mm bore to 110 mm OD is 26.425 mm; dividing C 52.7 kN by that section gives 1.994 kN per section millimetre, and the 65.1 mm overall width is 2.464x the section. Fillet discipline: the printed r_min 1.5 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 57.15x110 mm insert on its chamfer tilts the whole spherical seat. Static-first planning: the 0.553 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 57.15 mm shaft, not the 52.7 kN L10 value. Pitch-diameter arithmetic: dm = (57.15+110)/2 = 83.575 mm; at the 3,400 r/min limiting speed the ball set runs at dn approx 2.84x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Service tip for YAR-212-204-2F: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 26.425 mm radial section.", "applications": [ "crusher and screen auxiliary shafts", "heavy fan and heater units", "bulk-handling conveyor drives" ], "failure_modes": [ "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "Do not specify the 57.15 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 39.7 mm s1 dimension is the screw seating geometry inside the 39.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Catalogue ratings belong to YAR 212-204-2F as the grub two f execution; other order numbers of the YAR 212-204 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-212-204-2F?", "a": "YAR 212-204-2F measures 57.15 mm bore x 110 mm OD x 65.1 mm overall width (outer ring 26 mm wide), 2.25 x 4.331 x 2.563 in; mass about 1550 g. SKF 17000 ratings: C 52.7 kN, C0 36 kN, Pu 1.53 kN, limiting speed 3,400 r/min." }, { "q": "What does the designation YAR 212-204-2F mean?", "a": "the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -204 tail codes the bore in inches for inch-shaft bearings: 2 whole inch 4/16 in = 57.15 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." } ], "cross_ref": [ { "equiv_sku": "YAR", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-212-204-2F", "YAR 212-204-2F" ], "locale_variants": {} }, { "sku": "YAT-212-207", "brand": "SKF", "manufacturer_designation": "YAT 212-207", "series": "YAR2-series", "type": "insert", "d_mm": 61.912499999999994, "D_mm": 110, "B_mm": 48.5, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 52.7, "static_load_kN": 36, "fatigue_load_limit_kN": 1.53, "limiting_speed_rpm": 3400, "max_rpm": 3400, "weight_g": 1100, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAT 212-207 is a SKF insert bearing (Y-bearing) for a 61.912499999999994 mm (2.438 in) shaft: grub-screw insert bearing with the inner ring extended on one side, built to the ISO 15 diameter-series envelope with a sphered OD of 110 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAT basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAT carries the one-side-extended inner ring. inch bore code -207 decodes as 2\" +7/16, i.e. 61.912 mm; the metric coded size YAT 212 shares the same envelope but its bore is the metric value, not this one. with no -2F/-2RF suffix the order number denotes the open external execution of the YAR2 size — add external exclusion at the housing and plan relubrication intervals for dusty or wet surroundings. Envelope 61.912499999999994x110x48.5 mm (2.438x4.331x1.909 in), outer ring 26 mm wide, C 52.7 kN, C0 36 kN, Pu 1.53 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,400 r/min; mass 1100 g. Pitch-diameter arithmetic: dm = (61.912499999999994+110)/2 = 85.956 mm; at the 3,400 r/min limiting speed the ball set runs at dn approx 2.92x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Load balance for documentation: C0 36 kN against C 52.7 kN gives a 0.683 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 75.6 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the inner flinger. Bore-to-OD planning: OD 110 over bore 61.912499999999994 is a 1.777x step, while bore/overall-width gives 1.277; the spherical seat in the matching Y-housing must be specified to the 110 mm OD, not to a cylindrical housing bore. Mass-to-load ratio for YAT-212-207: 20.873 g of catalogue mass per rated kN of C, and 17.767 g per millimetre of bore — useful when comparing executions of the same 61.912499999999994x110 mm envelope on the drawing. Single-extension fitting note: with the inner ring extended only on the locking side, orient the open (non-extended) face toward the shaft step or housing shoulder as the drawing shows — reversed, the set screws end up unsupported by the abutment and the shortened side offers no seal land at all. Set-screw geometry on this size: the two 120 deg screws bear on the 61.912499999999994 mm shaft inside the 48.5 mm total width while the outer ring is only 26 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "heavy fan and heater units", "bulk-handling conveyor drives", "crusher and screen auxiliary shafts" ], "failure_modes": [ "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "relubricated with incompatible grease that hardens the factory fill and drags the seals" ], "pitfalls": [ "Replacement discipline: a one-side YAT insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 61.912499999999994 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 35 mm s1 dimension is the screw seating geometry inside the 22.5 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Ordering discipline for the 61.912499999999994 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAT-212-207?", "a": "Boundary dimensions: bore 61.912499999999994 mm, sphered OD 110 mm, overall width 48.5 mm; weight 1100 g. Loads: dynamic 52.7 kN, static 36 kN, fatigue 1.53 kN; the only published speed is the 3,400 r/min limiting value." }, { "q": "What does the designation YAT 212-207 mean?", "a": "reading the YAT basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAT carries the one-side-extended inner ring. inch bore code -207 decodes as 2\" +7/16, i.e. 61.912 mm; the metric coded size YAT 212 shares the same envelope but its bore is the metric value, not this one. with no -2F/-2RF suffix the order number denotes the open external execution of the YAR2 size — add external exclusion at the housing and plan relubrication intervals for dusty or wet surroundings." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAT", "equiv_brand": "ISO 15", "level": "full", "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAT-212-207", "YAT 212-207" ], "locale_variants": {} }, { "sku": "YAR-212-207-2F", "brand": "SKF", "manufacturer_designation": "YAR 212-207-2F", "series": "YAR2-series", "type": "insert", "d_mm": 61.912499999999994, "D_mm": 110, "B_mm": 65.1, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 52.7, "static_load_kN": 36, "fatigue_load_limit_kN": 1.53, "limiting_speed_rpm": 3400, "max_rpm": 3400, "weight_g": 1300, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 212-207-2F is a SKF insert bearing (Y-bearing) for a 61.912499999999994 mm (2.438 in) shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 110 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -207 decodes as 2\" +7/16, i.e. 61.912 mm; the metric coded size YAR 212 shares the same envelope but its bore is the metric value, not this one. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 61.912499999999994x110x65.1 mm (2.438x4.331x2.563 in), outer ring 26 mm wide, C 52.7 kN, C0 36 kN, Pu 1.53 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,400 r/min; mass 1300 g. Fatigue-limit check: Pu 1.53 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YAR 212-207-2F — most belt-driven mounted-unit loads sit comfortably under 2.903 % of C. Width accounting on this execution: 65.1 mm overall and 26 mm outer-ring width leave the housing designer 39.1 mm of inner-ring projection to accommodate the locking arrangement. Outer-vs-overall width: the outer ring is 26 mm wide inside the 65.1 mm total, so the extended inner ring accounts for 0.601 of the overall width (19.55 mm of axial projection per side). Spherical-seat note in numbers: the 110 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 85.956 = 270.039 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Selection figures for YAR 212-207-2F: C0/C is 0.683, Pu 1.53 kN is 2.903 % of the 52.7 kN dynamic rating, and the 1300 g catalogue mass works out to roughly 20.997 g per millimetre of the 61.912499999999994 mm bore. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Set-screw geometry on this size: the two 120 deg screws bear on the 61.912499999999994 mm shaft inside the 65.1 mm total width while the outer ring is only 26 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "agricultural harvesting machinery", "heavy fan and heater units", "crusher and screen auxiliary shafts" ], "failure_modes": [ "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "The 39.7 mm s1 dimension is the screw seating geometry inside the 39.1 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 61.912499999999994 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 52.7/36 kN figures belong specifically to YAR 212-207-2F; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-212-207-2F?", "a": "Boundary dimensions: bore 61.912499999999994 mm, sphered OD 110 mm, overall width 65.1 mm; weight 1300 g. Loads: dynamic 52.7 kN, static 36 kN, fatigue 1.53 kN; the only published speed is the 3,400 r/min limiting value." }, { "q": "What does the designation YAR 212-207-2F mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -207 decodes as 2\" +7/16, i.e. 61.912 mm; the metric coded size YAR 212 shares the same envelope but its bore is the metric value, not this one. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." } ], "cross_ref": [ { "equiv_sku": "YAR", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-212-207-2F", "YAR 212-207-2F" ], "locale_variants": {} }, { "sku": "YAR-214-207-2F", "brand": "SKF", "manufacturer_designation": "YAR 214-207-2F", "series": "YAR2-series", "type": "insert", "d_mm": 61.912499999999994, "D_mm": 125, "B_mm": 69.9, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 62.4, "static_load_kN": 45, "fatigue_load_limit_kN": 1.86, "limiting_speed_rpm": 2800, "max_rpm": 2800, "weight_g": 2400, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAR 214-207-2F is a grub-screw insert bearing with the inner ring extended on both sides, 61.912499999999994x125x69.9 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -207 = 61.912 mm, which is why this row sits beside, not on, the metric bore size. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution. Envelope 61.912499999999994x125x69.9 mm (2.438x4.921x2.752 in), outer ring 28 mm wide, C 62.4 kN, C0 45 kN, Pu 1.86 kN. The catalogue publishes a single speed ceiling, the limiting speed: 2,800 r/min; mass 2400 g. Selection figures for YAR 214-207-2F: C0/C is 0.721, Pu 1.86 kN is 2.981 % of the 62.4 kN dynamic rating, and the 2400 g catalogue mass works out to roughly 38.764 g per millimetre of the 61.912499999999994 mm bore. At the printed limiting speed of 2,800 r/min the mean diameter dm = 93.456 mm implies dn about 2.62x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Outer-vs-overall width: the outer ring is 28 mm wide inside the 69.9 mm total, so the extended inner ring accounts for 0.599 of the overall width (20.95 mm of axial projection per side). Load balance for documentation: C0 45 kN against C 62.4 kN gives a 0.721 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Rating split for the maintenance file: dynamic 62.4 kN (L10), static 45 kN (s0 shock check), fatigue 1.86 kN (adjusted life) — three separate uses for YAR 214-207-2F, none interchangeable with another. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Set-screw geometry on this size: the two 120 deg screws bear on the 61.912499999999994 mm shaft inside the 69.9 mm total width while the outer ring is only 28 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "crusher and screen auxiliary shafts", "bulk-handling conveyor drives", "agricultural harvesting machinery" ], "failure_modes": [ "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 61.912499999999994 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 39.7 mm s1 dimension is the screw seating geometry inside the 41.9 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Ordering discipline for the 61.912499999999994 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-214-207-2F?", "a": "The catalogue envelope is 61.912499999999994x125x69.9 mm with a spherical outside surface; mass 2400 g. Ratings C 62.4/45 kN, Pu 1.86 kN, limiting speed 2,800 r/min." }, { "q": "What does the designation YAR 214-207-2F mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -207 = 61.912 mm, which is why this row sits beside, not on, the metric bore size. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution." }, { "q": "How is YAR-214-207-2F lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." }, { "q": "How do the set screws lock the 61.912499999999994 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." } ], "cross_ref": [ { "equiv_sku": "YAR", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-214-207-2F", "YAR 214-207-2F" ], "locale_variants": {} }, { "sku": "YAR-213-208-2RF", "brand": "SKF", "manufacturer_designation": "YAR 213-208-2RF", "series": "YAR2-series", "type": "insert", "d_mm": 63.5, "D_mm": 120, "B_mm": 68.3, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 57.2, "static_load_kN": 40, "fatigue_load_limit_kN": 1.7, "limiting_speed_rpm": 1600, "max_rpm": 1600, "weight_g": 1900, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 213-208-2RF is a SKF insert bearing (Y-bearing) for a 63.5 mm (2.5 in) shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 120 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -208 decodes as 2\" +8/16, i.e. 63.5 mm; the metric coded size YAR 213 shares the same envelope but its bore is the metric value, not this one. -2RF means an NBR contact lip plus a rubber-coated flinger at both sides, the catalogue step above -2F for wet, abrasive or washed-down environments. Envelope 63.5x120x68.3 mm (2.5x4.724x2.689 in), outer ring 27 mm wide, C 57.2 kN, C0 40 kN, Pu 1.7 kN. The catalogue publishes a single speed ceiling, the limiting speed: 1,600 r/min; mass 1900 g. Load balance for documentation: C0 40 kN against C 57.2 kN gives a 0.699 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 82.5 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the rubberized flinger. Envelope arithmetic: the radial section from 63.5 mm bore to 120 mm OD is 28.25 mm; dividing C 57.2 kN by that section gives 2.025 kN per section millimetre, and the 68.3 mm overall width is 2.418x the section. Bore-to-OD planning: OD 120 over bore 63.5 is a 1.89x step, while bore/overall-width gives 0.93; the spherical seat in the matching Y-housing must be specified to the 120 mm OD, not to a cylindrical housing bore. Capacity density: 57.2 kN from 1.900 kg of bearing steel is about 30.105 kN per kilogram, and per width millimetre the 68.3 mm unit carries 0.837 kN of dynamic capacity. Rubberized-flinger note: the -2RF coated throwers are vulcanized assemblies — never lever or hammer against the flinger when mounting, and press only on the inner ring when the bearing is fitted loose before the housing cap closes, or the flinger lip folds inward and grinds on the inner ring. Service tip for YAR-213-208-2RF: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 28.25 mm radial section.", "applications": [ "bulk-handling conveyor drives", "crusher and screen auxiliary shafts", "agricultural harvesting machinery" ], "failure_modes": [ "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "The 42.9 mm s1 dimension is the screw seating geometry inside the 41.3 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 63.5 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 57.2/40 kN figures belong specifically to YAR 213-208-2RF; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-213-208-2RF?", "a": "Boundary dimensions: bore 63.5 mm, sphered OD 120 mm, overall width 68.3 mm; weight 1900 g. Loads: dynamic 57.2 kN, static 40 kN, fatigue 1.7 kN; the only published speed is the 1,600 r/min limiting value." }, { "q": "What does the designation YAR 213-208-2RF mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -208 decodes as 2\" +8/16, i.e. 63.5 mm; the metric coded size YAR 213 shares the same envelope but its bore is the metric value, not this one. -2RF means an NBR contact lip plus a rubber-coated flinger at both sides, the catalogue step above -2F for wet, abrasive or washed-down environments." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." }, { "q": "How is YAR-213-208-2RF lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." } ], "cross_ref": [ { "equiv_sku": "YAR-213-208-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 63.5x120x68.3 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 213-208-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-213-208-2RF", "YAR 213-208-2RF" ], "locale_variants": {} }, { "sku": "YAR-213-208-2F", "brand": "SKF", "manufacturer_designation": "YAR 213-208-2F", "series": "YAR2-series", "type": "insert", "d_mm": 63.5, "D_mm": 120, "B_mm": 68.3, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 57.2, "static_load_kN": 40, "fatigue_load_limit_kN": 1.7, "limiting_speed_rpm": 3000, "max_rpm": 3000, "weight_g": 1850, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YAR 213-208-2F is SKF's 63.5 mm-bore grub-screw insert bearing with the inner ring extended on both sides in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 63.5x120x68.3 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -208 tail codes the bore in inches for inch-shaft bearings: 2 whole inch 8/16 in = 63.5 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 63.5x120x68.3 mm (2.5x4.724x2.689 in), outer ring 27 mm wide, C 57.2 kN, C0 40 kN, Pu 1.7 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,000 r/min; mass 1850 g. Outer-vs-overall width: the outer ring is 27 mm wide inside the 68.3 mm total, so the extended inner ring accounts for 0.605 of the overall width (20.65 mm of axial projection per side). Fatigue-limit check: Pu 1.7 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YAR 213-208-2F — most belt-driven mounted-unit loads sit comfortably under 2.972 % of C. Selection figures for YAR 213-208-2F: C0/C is 0.699, Pu 1.7 kN is 2.972 % of the 57.2 kN dynamic rating, and the 1850 g catalogue mass works out to roughly 29.134 g per millimetre of the 63.5 mm bore. The s1 42.9 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Grease-life arithmetic is dominated by speed: at dn approx 2.75x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Set-screw geometry on this size: the two 120 deg screws bear on the 63.5 mm shaft inside the 68.3 mm total width while the outer ring is only 27 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "crusher and screen auxiliary shafts", "bulk-handling conveyor drives", "agricultural harvesting machinery" ], "failure_modes": [ "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 63.5 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 42.9 mm s1 dimension is the screw seating geometry inside the 41.3 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Ordering discipline for the 63.5 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-213-208-2F?", "a": "YAR 213-208-2F measures 63.5 mm bore x 120 mm OD x 68.3 mm overall width (outer ring 27 mm wide), 2.5 x 4.724 x 2.689 in; mass about 1850 g. SKF 17000 ratings: C 57.2 kN, C0 40 kN, Pu 1.7 kN, limiting speed 3,000 r/min." }, { "q": "What does the designation YAR 213-208-2F mean?", "a": "the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -208 tail codes the bore in inches for inch-shaft bearings: 2 whole inch 8/16 in = 63.5 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." } ], "cross_ref": [ { "equiv_sku": "YAR-213-208-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 63.5x120x68.3 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 213-208-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-213-208-2F", "YAR 213-208-2F" ], "locale_variants": {} }, { "sku": "YAR-214-208-2F", "brand": "SKF", "manufacturer_designation": "YAR 214-208-2F", "series": "YAR2-series", "type": "insert", "d_mm": 63.5, "D_mm": 125, "B_mm": 69.9, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 62.4, "static_load_kN": 45, "fatigue_load_limit_kN": 1.86, "limiting_speed_rpm": 2800, "max_rpm": 2800, "weight_g": 2300, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YAR 214-208-2F is SKF's 63.5 mm-bore grub-screw insert bearing with the inner ring extended on both sides in the YAR2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 63.5x125x69.9 mm. Wide-inner-ring deep-groove ball geometry carries the load: the extended inner ring gives the shaft grip and the seal lands, while the outer ring stays narrow and spherically ground on its outside surface. the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -208 tail codes the bore in inches for inch-shaft bearings: 2 whole inch 8/16 in = 63.5 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 63.5x125x69.9 mm (2.5x4.921x2.752 in), outer ring 28 mm wide, C 62.4 kN, C0 45 kN, Pu 1.86 kN. The catalogue publishes a single speed ceiling, the limiting speed: 2,800 r/min; mass 2300 g. Bore-to-OD planning: OD 125 over bore 63.5 is a 1.969x step, while bore/overall-width gives 0.908; the spherical seat in the matching Y-housing must be specified to the 125 mm OD, not to a cylindrical housing bore. Spherical-seat note in numbers: the 125 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 94.25 = 296.095 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Fatigue-limit check: Pu 1.86 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YAR 214-208-2F — most belt-driven mounted-unit loads sit comfortably under 2.981 % of C. Envelope arithmetic: the radial section from 63.5 mm bore to 125 mm OD is 30.75 mm; dividing C 62.4 kN by that section gives 2.029 kN per section millimetre, and the 69.9 mm overall width is 2.273x the section. Outer-vs-overall width: the outer ring is 28 mm wide inside the 69.9 mm total, so the extended inner ring accounts for 0.599 of the overall width (20.95 mm of axial projection per side). Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Set-screw geometry on this size: the two 120 deg screws bear on the 63.5 mm shaft inside the 69.9 mm total width while the outer ring is only 28 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "heavy fan and heater units", "bulk-handling conveyor drives", "crusher and screen auxiliary shafts" ], "failure_modes": [ "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "The 39.7 mm s1 dimension is the screw seating geometry inside the 41.9 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 63.5 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 62.4/45 kN figures belong specifically to YAR 214-208-2F; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-214-208-2F?", "a": "YAR 214-208-2F measures 63.5 mm bore x 125 mm OD x 69.9 mm overall width (outer ring 28 mm wide), 2.5 x 4.921 x 2.752 in; mass about 2300 g. SKF 17000 ratings: C 62.4 kN, C0 45 kN, Pu 1.86 kN, limiting speed 2,800 r/min." }, { "q": "What does the designation YAR 214-208-2F mean?", "a": "the YAR prefix names SKF grub-screw Y-bearings: two set screws in the extended inner ring lock the shaft at a 120 deg angle, and the inner ring extends symmetrically on both sides. the three-digit -208 tail codes the bore in inches for inch-shaft bearings: 2 whole inch 8/16 in = 63.5 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." }, { "q": "How is YAR-214-208-2F lubricated?", "a": "It is grease-filled and sealed for life at the factory; the housing fitting allows re-greasing through the outer-ring arrangement where provided. Never mix grease types on the food-grade HV/VE495 executions." } ], "cross_ref": [ { "equiv_sku": "YAR", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-214-208-2F", "YAR 214-208-2F" ], "locale_variants": {} }, { "sku": "YAR-213-211-2F", "brand": "SKF", "manufacturer_designation": "YAR 213-211-2F", "series": "YAR2-series", "type": "insert", "d_mm": 68.2625, "D_mm": 120, "B_mm": 68.3, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 57.2, "static_load_kN": 40, "fatigue_load_limit_kN": 1.7, "limiting_speed_rpm": 3000, "max_rpm": 3000, "weight_g": 1600, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAR 213-211-2F is a SKF insert bearing (Y-bearing) for a 68.2625 mm (2.688 in) shaft: grub-screw insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 120 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -211 decodes as 2\" +11/16, i.e. 68.263 mm; the metric coded size YAR 213 shares the same envelope but its bore is the metric value, not this one. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 68.2625x120x68.3 mm (2.688x4.724x2.689 in), outer ring 27 mm wide, C 57.2 kN, C0 40 kN, Pu 1.7 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,000 r/min; mass 1600 g. Imperial procurement cross-check: 2.688 in bore, 4.724 in OD, 2.689 in overall width; the 1600 g mass converts to 1.600 kg (56.4 oz) for the bill of materials. Width accounting on this execution: 68.3 mm overall and 27 mm outer-ring width leave the housing designer 41.3 mm of inner-ring projection to accommodate the locking arrangement. Static-first planning: the 0.586 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 68.2625 mm shaft, not the 57.2 kN L10 value. Mass-to-load ratio for YAR-213-211-2F: 27.972 g of catalogue mass per rated kN of C, and 23.439 g per millimetre of bore — useful when comparing executions of the same 68.2625x120 mm envelope on the drawing. Rating split for the maintenance file: dynamic 57.2 kN (L10), static 40 kN (s0 shock check), fatigue 1.7 kN (adjusted life) — three separate uses for YAR 213-211-2F, none interchangeable with another. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Service tip for YAR-213-211-2F: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 25.869 mm radial section.", "applications": [ "bulk-handling conveyor drives", "agricultural harvesting machinery", "heavy fan and heater units" ], "failure_modes": [ "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "The 42.9 mm s1 dimension is the screw seating geometry inside the 41.3 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 68.2625 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 57.2/40 kN figures belong specifically to YAR 213-211-2F; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-213-211-2F?", "a": "Boundary dimensions: bore 68.2625 mm, sphered OD 120 mm, overall width 68.3 mm; weight 1600 g. Loads: dynamic 57.2 kN, static 40 kN, fatigue 1.7 kN; the only published speed is the 3,000 r/min limiting value." }, { "q": "What does the designation YAR 213-211-2F mean?", "a": "reading the YAR basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAR carries the symmetric, both-sides-extended inner ring. inch bore code -211 decodes as 2\" +11/16, i.e. 68.263 mm; the metric coded size YAR 213 shares the same envelope but its bore is the metric value, not this one. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." }, { "q": "Why is the outside surface spherical?", "a": "The convex spherical OD mates with a matching spherical bore in the SKF Y-housing, accommodating initial STATIC misalignment at mounting. It is not a continuous-oscillation pivot and it does not work in a cylindrical plain bore." } ], "cross_ref": [ { "equiv_sku": "YAR", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-213-211-2F", "YAR 213-211-2F" ], "locale_variants": {} }, { "sku": "YAT-215-215", "brand": "SKF", "manufacturer_designation": "YAT 215-215", "series": "YAR2-series", "type": "insert", "d_mm": 74.6125, "D_mm": 130, "B_mm": 53.5, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 66.3, "static_load_kN": 49, "fatigue_load_limit_kN": 2.04, "limiting_speed_rpm": 2600, "max_rpm": 2600, "weight_g": 1750, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YAR2 series order number YAT 215-215 is a SKF insert bearing (Y-bearing) for a 74.6125 mm (2.938 in) shaft: grub-screw insert bearing with the inner ring extended on one side, built to the ISO 15 diameter-series envelope with a sphered OD of 130 mm. Inside is a sealed deep-groove ball set with an extended inner ring, two set screws 120 deg apart doing the shaft locking, and the sphered outer ring providing the unit's static alignment pivot. reading the YAT basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAT carries the one-side-extended inner ring. inch bore code -215 decodes as 2\" +15/16, i.e. 74.612 mm; the metric coded size YAT 215 shares the same envelope but its bore is the metric value, not this one. with no -2F/-2RF suffix the order number denotes the open external execution of the YAR2 size — add external exclusion at the housing and plan relubrication intervals for dusty or wet surroundings. Envelope 74.6125x130x53.5 mm (2.938x5.118x2.106 in), outer ring 29 mm wide, C 66.3 kN, C0 49 kN, Pu 2.04 kN. The catalogue publishes a single speed ceiling, the limiting speed: 2,600 r/min; mass 1750 g. Bore-to-OD planning: OD 130 over bore 74.6125 is a 1.742x step, while bore/overall-width gives 1.395; the spherical seat in the matching Y-housing must be specified to the 130 mm OD, not to a cylindrical housing bore. Selection figures for YAT 215-215: C0/C is 0.739, Pu 2.04 kN is 3.077 % of the 66.3 kN dynamic rating, and the 1750 g catalogue mass works out to roughly 23.455 g per millimetre of the 74.6125 mm bore. Envelope arithmetic: the radial section from 74.6125 mm bore to 130 mm OD is 27.694 mm; dividing C 66.3 kN by that section gives 2.394 kN per section millimetre, and the 53.5 mm overall width is 1.932x the section. Spherical-seat note in numbers: the 130 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 102.306 = 321.404 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Fatigue-limit check: Pu 2.04 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YAT 215-215 — most belt-driven mounted-unit loads sit comfortably under 3.077 % of C. Single-extension fitting note: with the inner ring extended only on the locking side, orient the open (non-extended) face toward the shaft step or housing shoulder as the drawing shows — reversed, the set screws end up unsupported by the abutment and the shortened side offers no seal land at all. Set-screw geometry on this size: the two 120 deg screws bear on the 74.6125 mm shaft inside the 53.5 mm total width while the outer ring is only 29 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "heavy fan and heater units", "crusher and screen auxiliary shafts", "bulk-handling conveyor drives" ], "failure_modes": [ "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "The 39 mm s1 dimension is the screw seating geometry inside the 24.5 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Do not specify the 74.6125 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a one-side YAT insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 66.3/49 kN figures belong specifically to YAT 215-215; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAT-215-215?", "a": "Boundary dimensions: bore 74.6125 mm, sphered OD 130 mm, overall width 53.5 mm; weight 1750 g. Loads: dynamic 66.3 kN, static 49 kN, fatigue 2.04 kN; the only published speed is the 2,600 r/min limiting value." }, { "q": "What does the designation YAT 215-215 mean?", "a": "reading the YAT basic designation: set-screw shaft locking with the screws spaced 120 deg apart; YAT carries the one-side-extended inner ring. inch bore code -215 decodes as 2\" +15/16, i.e. 74.612 mm; the metric coded size YAT 215 shares the same envelope but its bore is the metric value, not this one. with no -2F/-2RF suffix the order number denotes the open external execution of the YAR2 size — add external exclusion at the housing and plan relubrication intervals for dusty or wet surroundings." }, { "q": "How do the set screws lock the 74.6125 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." } ], "cross_ref": [ { "equiv_sku": "YAT", "equiv_brand": "ISO 15", "level": "full", "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAT-215-215", "YAT 215-215" ], "locale_variants": {} }, { "sku": "YAR-215-215-2F", "brand": "SKF", "manufacturer_designation": "YAR 215-215-2F", "series": "YAR2-series", "type": "insert", "d_mm": 74.6125, "D_mm": 130, "B_mm": 73.3, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 66.3, "static_load_kN": 49, "fatigue_load_limit_kN": 2.04, "limiting_speed_rpm": 2600, "max_rpm": 2600, "weight_g": 2150, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAR 215-215-2F is a grub-screw insert bearing with the inner ring extended on both sides, 74.6125x130x73.3 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -215 = 74.612 mm, which is why this row sits beside, not on, the metric bore size. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution. Envelope 74.6125x130x73.3 mm (2.938x5.118x2.886 in), outer ring 29 mm wide, C 66.3 kN, C0 49 kN, Pu 2.04 kN. The catalogue publishes a single speed ceiling, the limiting speed: 2,600 r/min; mass 2150 g. Selection figures for YAR 215-215-2F: C0/C is 0.739, Pu 2.04 kN is 3.077 % of the 66.3 kN dynamic rating, and the 2150 g catalogue mass works out to roughly 28.816 g per millimetre of the 74.6125 mm bore. Grease-life arithmetic is dominated by speed: at dn approx 2.66x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Capacity density: 66.3 kN from 2.150 kg of bearing steel is about 30.837 kN per kilogram, and per width millimetre the 73.3 mm unit carries 0.905 kN of dynamic capacity. The s1 46.3 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 92 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the plain flinger. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Set-screw geometry on this size: the two 120 deg screws bear on the 74.6125 mm shaft inside the 73.3 mm total width while the outer ring is only 29 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "crusher and screen auxiliary shafts", "bulk-handling conveyor drives", "agricultural harvesting machinery" ], "failure_modes": [ "set screws loosen under vibration or reversing load, letting the inner ring spin and fret the shaft at the screw points", "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Do not specify the 74.6125 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 46.3 mm s1 dimension is the screw seating geometry inside the 44.3 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Ordering discipline for the 74.6125 mm size: the chapter lists several executions side by side (YAR2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-215-215-2F?", "a": "The catalogue envelope is 74.6125x130x73.3 mm with a spherical outside surface; mass 2150 g. Ratings C 66.3/49 kN, Pu 2.04 kN, limiting speed 2,600 r/min." }, { "q": "What does the designation YAR 215-215-2F mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -215 = 74.612 mm, which is why this row sits beside, not on, the metric bore size. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAR-215-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 74.6125x130x73.3 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 215-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 74.6125 mm vs 75 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-215-215-2F", "YAR 215-215-2F" ], "locale_variants": {} }, { "sku": "YAT-216-300", "brand": "SKF", "manufacturer_designation": "YAT 216-300", "series": "YAR2-series", "type": "insert", "d_mm": 76.19999999999999, "D_mm": 140, "B_mm": 55.5, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 72.8, "static_load_kN": 53, "fatigue_load_limit_kN": 2.16, "limiting_speed_rpm": 2400, "max_rpm": 2400, "weight_g": 2200, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAT 216-300 is a grub-screw insert bearing with the inner ring extended on one side, 76.19999999999999x140x55.5 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAT is SKF's grub-screw insert design — a single extended inner-ring side housing the two 120 deg set screws. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -300 = 76.2 mm, which is why this row sits beside, not on, the metric bore size. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units. Envelope 76.19999999999999x140x55.5 mm (3x5.512x2.185 in), outer ring 30 mm wide, C 72.8 kN, C0 53 kN, Pu 2.16 kN. The catalogue publishes a single speed ceiling, the limiting speed: 2,400 r/min; mass 2200 g. Static-first planning: the 0.955 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 76.19999999999999 mm shaft, not the 72.8 kN L10 value. Bore-to-OD planning: OD 140 over bore 76.19999999999999 is a 1.837x step, while bore/overall-width gives 1.373; the spherical seat in the matching Y-housing must be specified to the 140 mm OD, not to a cylindrical housing bore. Fatigue-limit check: Pu 2.16 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YAT 216-300 — most belt-driven mounted-unit loads sit comfortably under 2.967 % of C. Pitch-diameter arithmetic: dm = (76.19999999999999+140)/2 = 108.1 mm; at the 2,400 r/min limiting speed the ball set runs at dn approx 2.59x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Load balance for documentation: C0 53 kN against C 72.8 kN gives a 0.728 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Single-extension fitting note: with the inner ring extended only on the locking side, orient the open (non-extended) face toward the shaft step or housing shoulder as the drawing shows — reversed, the set screws end up unsupported by the abutment and the shortened side offers no seal land at all. Set-screw geometry on this size: the two 120 deg screws bear on the 76.19999999999999 mm shaft inside the 55.5 mm total width while the outer ring is only 30 mm wide, leaving the extended ring to carry the screw points clear of the ball track.", "applications": [ "bulk-handling conveyor drives", "heavy fan and heater units", "agricultural harvesting machinery" ], "failure_modes": [ "over-tightened screw points dimple the shaft so deeply that the bearing cannot be removed without machining", "loose screws back out into the seal/flinger gap, tearing the NBR lip and admitting abrasive dust", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "Do not specify the 76.19999999999999 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "The 39 mm s1 dimension is the screw seating geometry inside the 25.5 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Replacement discipline: a one-side YAT insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "Catalogue ratings belong to YAT 216-300 as the grub one open execution; other order numbers of the YAT 216-300 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAT-216-300?", "a": "The catalogue envelope is 76.19999999999999x140x55.5 mm with a spherical outside surface; mass 2200 g. Ratings C 72.8/53 kN, Pu 2.16 kN, limiting speed 2,400 r/min." }, { "q": "What does the designation YAT 216-300 mean?", "a": "YAT is SKF's grub-screw insert design — a single extended inner-ring side housing the two 120 deg set screws. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -300 = 76.2 mm, which is why this row sits beside, not on, the metric bore size. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units." }, { "q": "How do the set screws lock the 76.19999999999999 mm shaft?", "a": "Two set screws in the extended inner ring, spaced 120 deg apart, are tightened in sequence against the shaft; their points create small indentations that resist rotation and axial drift. Use the SKF mounting procedure and re-check after run-in, especially on vibrating conveyors." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." } ], "cross_ref": [ { "equiv_sku": "YAT", "equiv_brand": "ISO 15", "level": "full", "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAT-216-300", "YAT 216-300" ], "locale_variants": {} }, { "sku": "YAR-216-300-2F", "brand": "SKF", "manufacturer_designation": "YAR 216-300-2F", "series": "YAR2-series", "type": "insert", "d_mm": 76.19999999999999, "D_mm": 140, "B_mm": 77.8, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 72.8, "static_load_kN": 53, "fatigue_load_limit_kN": 2.16, "limiting_speed_rpm": 2400, "max_rpm": 2400, "weight_g": 2800, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YAR 216-300-2F is a grub-screw insert bearing with the inner ring extended on both sides, 76.19999999999999x140x77.8 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction follows the Y-bearing principle: a capped and flinger-protected deep-groove ball insert, inner ring elongated for the screw points, outer ring convex-spherical for the housing seat. YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -300 = 76.2 mm, which is why this row sits beside, not on, the metric bore size. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution. Envelope 76.19999999999999x140x77.8 mm (3x5.512x3.063 in), outer ring 30 mm wide, C 72.8 kN, C0 53 kN, Pu 2.16 kN. The catalogue publishes a single speed ceiling, the limiting speed: 2,400 r/min; mass 2800 g. Fillet discipline: the printed r_min 2 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 76.19999999999999x140 mm insert on its chamfer tilts the whole spherical seat. Grease-life arithmetic is dominated by speed: at dn approx 2.59x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Static-first planning: the 0.681 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 76.19999999999999 mm shaft, not the 72.8 kN L10 value. Envelope arithmetic: the radial section from 76.19999999999999 mm bore to 140 mm OD is 31.9 mm; dividing C 72.8 kN by that section gives 2.282 kN per section millimetre, and the 77.8 mm overall width is 2.439x the section. Speed ceiling of 2,400 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Both-sides sealed order-number note: the two set screws clamp through dimpled recesses in the extended inner ring; tighten alternately to the catalogue procedure and retighten after the first run-in period, because the -2F flingers keep dust out but cannot compensate for a screw that walked loose. Service tip for YAR-216-300-2F: dimpled or drilled shaft spots under the screw points are sometimes specified on shock duty, but the standard mounting relies on point indentation alone — never substitute longer screws that reach the 31.9 mm radial section.", "applications": [ "heavy fan and heater units", "crusher and screen auxiliary shafts", "bulk-handling conveyor drives" ], "failure_modes": [ "hammering the bearing onto a tight shaft through the outer ring brinells the ball tracks before first start-up", "shaft tolerance too loose for point locking: the screws deform the soft inner ring but never reach a rigid seat", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "Do not specify the 76.19999999999999 mm grub-screw insert for a shaft harder than about 45 HRC without dimples: the screw points skate on hard surfaces and the unit creeps regardless of tightening torque.", "Replacement discipline: a YAR insert is not interchangeable with an eccentric-collar unit of the same envelope — the shaft may need spot-facing or collar space that does not exist.", "The 47.6 mm s1 dimension is the screw seating geometry inside the 47.8 mm of extended inner ring; a shaft step that crowds that side prevents the screws reaching the shaft squarely.", "Catalogue ratings belong to YAR 216-300-2F as the grub two f execution; other order numbers of the YAR 216-300 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YAR-216-300-2F?", "a": "The catalogue envelope is 76.19999999999999x140x77.8 mm with a spherical outside surface; mass 2800 g. Ratings C 72.8/53 kN, Pu 2.16 kN, limiting speed 2,400 r/min." }, { "q": "What does the designation YAR 216-300-2F mean?", "a": "YAR is SKF's grub-screw insert design — an inner ring extended equally past the outer ring on both sides, the screws still 120 deg apart. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -300 = 76.2 mm, which is why this row sits beside, not on, the metric bore size. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution." }, { "q": "What is the difference between YAT and YAR?", "a": "YAT has the inner ring extended on ONE side (and in this chapter is the open execution); YAR extends the inner ring symmetrically on BOTH sides and is delivered with seal/flinger packages such as -2F or -2RF. Bore, OD and ball set are shared; overall width and sealing differ." }, { "q": "Can a grub-screw insert replace an eccentric-collar one?", "a": "Not without checking shaft and housing preparation: collar units need axial space for the collar and rely on rotation-direction self-tightening, while grub screws need clean shaft spots under the points. Same envelope does not mean same mounting." } ], "cross_ref": [ { "equiv_sku": "YAR", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YAR-216-300-2F", "YAR 216-300-2F" ], "locale_variants": {} }, { "sku": "YET-203-15", "brand": "SKF", "manufacturer_designation": "YET 203/15", "series": "YEL2-series", "type": "insert", "d_mm": 15, "D_mm": 40, "B_mm": 19.1, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 9.56, "static_load_kN": 4.75, "fatigue_load_limit_kN": 0.2, "limiting_speed_rpm": 9500, "max_rpm": 9500, "weight_g": 120, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YEL2 series order number YET 203/15 is a SKF insert bearing (Y-bearing) for a 15 mm shaft: eccentric-locking-collar insert bearing with a one-side-extended inner ring, built to the ISO 15 diameter-series envelope with a sphered OD of 40 mm. Inside sits a sealed ball insert with an eccentric collar on the extended ring: collar bite locks the shaft, the contact seals retain the life grease, and the spherical OD floats in the Y-housing. YET means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on one side. the slash tail names a non-standard metric bore directly: YET 203/15 is the 15 mm bore execution of the size series. with no -2F/-2RF suffix the order number denotes the open external execution of the YEL2 size — add external exclusion at the housing and plan relubrication intervals for dusty or wet surroundings. Envelope 15x40x19.1 mm (0.591x1.575x0.752 in), outer ring 12 mm wide, C 9.56 kN, C0 4.75 kN, Pu 0.2 kN. Mounted width B1 28.6 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 9,500 r/min; mass 120 g. Mass-to-load ratio for YET-203-15: 12.552 g of catalogue mass per rated kN of C, and 8 g per millimetre of bore — useful when comparing executions of the same 15x40 mm envelope on the drawing. Envelope arithmetic: the radial section from 15 mm bore to 40 mm OD is 12.5 mm; dividing C 9.56 kN by that section gives 0.765 kN per section millimetre, and the 19.1 mm overall width is 1.528x the section. Speed ceiling of 9,500 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Spherical-seat note in numbers: the 40 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 27.5 = 86.394 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Fatigue-limit check: Pu 0.2 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YET 203/15 — most belt-driven mounted-unit loads sit comfortably under 2.092 % of C. One-side collar note: the eccentric collar mounts on the extended side only and must turn in the shaft rotation direction to self-tighten; on reversing drives this design can loosen by design intent — choose grub-screw or ConCentra locking for true bidirectional shafts. Collar geometry for this size: over the 12 mm outer-ring width the inner ring runs to 19.1 mm overall (28.6 mm including the eccentric collar width), giving the collar its eccentric seating face clear of the seal.", "applications": [ "small garden machinery and rotavators", "light drive rollers with plain commercial shafts", "lawn and turf equipment" ], "failure_modes": [ "collar set screw not locked into its recess: the collar unwinds and the bearing walks off its seat", "eccentric collar mounted against rotation direction works loose and spins, fretting the shaft", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "relubricated with incompatible grease that hardens the factory fill and drags the seals" ], "pitfalls": [ "Overall width 28.6 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YET collar.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "The eccentric collar is handed to running direction; fit it wrong on the 15 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "The 9.56/4.75 kN figures belong specifically to YET 203/15; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YET-203-15?", "a": "Boundary dimensions: bore 15 mm, sphered OD 40 mm, overall width 19.1 mm (28.6 mm with the collar); weight 120 g. Loads: dynamic 9.56 kN, static 4.75 kN, fatigue 0.2 kN; the only published speed is the 9,500 r/min limiting value." }, { "q": "What does the designation YET 203/15 mean?", "a": "YET means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on one side. the slash tail names a non-standard metric bore directly: YET 203/15 is the 15 mm bore execution of the size series. with no -2F/-2RF suffix the order number denotes the open external execution of the YEL2 size — add external exclusion at the housing and plan relubrication intervals for dusty or wet surroundings." }, { "q": "How does the eccentric locking collar work?", "a": "The collar has an eccentric bore matching an eccentric on the inner ring extension. After sliding it on, turn it in the shaft's running direction until it grips, then tighten the collar's own set screw into its recess. Rotation then self-tightens rather than loosens the lock." }, { "q": "Why is the collar sometimes wider than the bearing (B1)?", "a": "The B1 dimension includes the eccentric collar's axial width, so the housing needs that extra space beside the bearing. Draw housings to B1, not B, when replacing a grub-screw unit with a collar unit." } ], "cross_ref": [ { "equiv_sku": "YET", "equiv_brand": "ISO 15", "level": "full", "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YET-203-15", "YET 203/15" ], "locale_variants": {} }, { "sku": "YET-203", "brand": "SKF", "manufacturer_designation": "YET 203", "series": "YEL2-series", "type": "insert", "d_mm": 17, "D_mm": 40, "B_mm": 19.1, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 9.56, "static_load_kN": 4.75, "fatigue_load_limit_kN": 0.2, "limiting_speed_rpm": 9500, "max_rpm": 9500, "weight_g": 110, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YET 203 is SKF's 17 mm-bore eccentric-locking-collar insert bearing with a one-side-extended inner ring in the YEL2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 17x40x19.1 mm. The deep-groove ball set is built into an extended inner ring carrying a separate eccentric locking collar; turning the collar against its eccentric seat pinches the shaft, and the sphered outer ring self-aligns in the housing. the YET prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended one side. the size code 203 carries the usual bore arithmetic — 17 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. this suffix-free execution is listed without the sealed external design: the 19.1 mm width is the one-side-extended inner ring alone, so protection depends on the housing seals and the relubrication routine rather than bearing-mounted contact seals. Envelope 17x40x19.1 mm (0.669x1.575x0.752 in), outer ring 12 mm wide, C 9.56 kN, C0 4.75 kN, Pu 0.2 kN. Mounted width B1 28.6 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 9,500 r/min; mass 110 g. Grease-life arithmetic is dominated by speed: at dn approx 2.71x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. At the printed limiting speed of 9,500 r/min the mean diameter dm = 28.5 mm implies dn about 2.71x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Load balance for documentation: C0 4.75 kN against C 9.56 kN gives a 0.497 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Bore-to-OD planning: OD 40 over bore 17 is a 2.353x step, while bore/overall-width gives 0.89; the spherical seat in the matching Y-housing must be specified to the 40 mm OD, not to a cylindrical housing bore. Speed ceiling of 9,500 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. One-side collar note: the eccentric collar mounts on the extended side only and must turn in the shaft rotation direction to self-tighten; on reversing drives this design can loosen by design intent — choose grub-screw or ConCentra locking for true bidirectional shafts. Collar geometry for this size: over the 12 mm outer-ring width the inner ring runs to 19.1 mm overall (28.6 mm including the eccentric collar width), giving the collar its eccentric seating face clear of the seal.", "applications": [ "lawn and turf equipment", "small garden machinery and rotavators", "light drive rollers with plain commercial shafts" ], "failure_modes": [ "burr or paint under the eccentric faces prevents full bite, leaving an eccentric preload that runs hot", "eccentric collar mounted against rotation direction works loose and spins, fretting the shaft", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "relubricated with incompatible grease that hardens the factory fill and drags the seals" ], "pitfalls": [ "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "Overall width 28.6 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YET collar.", "The eccentric collar is handed to running direction; fit it wrong on the 17 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Ordering discipline for the 17 mm size: the chapter lists several executions side by side (YEL2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YET-203?", "a": "YET 203 measures 17 mm bore x 40 mm OD x 19.1 mm overall width (outer ring 12 mm wide), 0.669 x 1.575 x 0.752 in; mass about 110 g. SKF 17000 ratings: C 9.56 kN, C0 4.75 kN, Pu 0.2 kN, limiting speed 9,500 r/min." }, { "q": "What does the designation YET 203 mean?", "a": "the YET prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended one side. the size code 203 carries the usual bore arithmetic — 17 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. this suffix-free execution is listed without the sealed external design: the 19.1 mm width is the one-side-extended inner ring alone, so protection depends on the housing seals and the relubrication routine rather than bearing-mounted contact seals." }, { "q": "Why is the collar sometimes wider than the bearing (B1)?", "a": "The B1 dimension includes the eccentric collar's axial width, so the housing needs that extra space beside the bearing. Draw housings to B1, not B, when replacing a grub-screw unit with a collar unit." }, { "q": "What is the difference between YET and YEL?", "a": "YET has the inner ring extended on one side; YEL extends it on both sides. Both lock with the eccentric collar and share bore/OD geometry; the sealed -2F executions sit in the YEL listings." } ], "cross_ref": [ { "equiv_sku": "YET", "equiv_brand": "ISO 15", "level": "full", "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YET-203", "YET 203" ], "locale_variants": {} }, { "sku": "YET-204", "brand": "SKF", "manufacturer_designation": "YET 204", "series": "YEL2-series", "type": "insert", "d_mm": 20, "D_mm": 47, "B_mm": 21, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 12.7, "static_load_kN": 6.55, "fatigue_load_limit_kN": 0.28, "limiting_speed_rpm": 8500, "max_rpm": 8500, "weight_g": 160, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YEL2 series order number YET 204 is a SKF insert bearing (Y-bearing) for a 20 mm shaft: eccentric-locking-collar insert bearing with a one-side-extended inner ring, built to the ISO 15 diameter-series envelope with a sphered OD of 47 mm. Inside sits a sealed ball insert with an eccentric collar on the extended ring: collar bite locks the shaft, the contact seals retain the life grease, and the spherical OD floats in the Y-housing. YET means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on one side. the size code 204 carries the usual bore arithmetic — 20 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. with no -2F/-2RF suffix the order number denotes the open external execution of the YEL2 size — add external exclusion at the housing and plan relubrication intervals for dusty or wet surroundings. Envelope 20x47x21 mm (0.787x1.85x0.827 in), outer ring 14 mm wide, C 12.7 kN, C0 6.55 kN, Pu 0.28 kN. Mounted width B1 30.5 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 8,500 r/min; mass 160 g. Bore-to-OD planning: OD 47 over bore 20 is a 2.35x step, while bore/overall-width gives 0.952; the spherical seat in the matching Y-housing must be specified to the 47 mm OD, not to a cylindrical housing bore. Pitch-diameter arithmetic: dm = (20+47)/2 = 33.5 mm; at the 8,500 r/min limiting speed the ball set runs at dn approx 2.85x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Outer-vs-overall width: the outer ring is 14 mm wide inside the 21 mm total, so the extended inner ring accounts for 0.333 of the overall width (7 mm of axial projection on the locking side). Envelope arithmetic: the radial section from 20 mm bore to 47 mm OD is 13.5 mm; dividing C 12.7 kN by that section gives 0.941 kN per section millimetre, and the 21 mm overall width is 1.556x the section. Imperial procurement cross-check: 0.787 in bore, 1.85 in OD, 0.827 in overall width; the 160 g mass converts to 0.160 kg (5.6 oz) for the bill of materials. One-side collar note: the eccentric collar mounts on the extended side only and must turn in the shaft rotation direction to self-tighten; on reversing drives this design can loosen by design intent — choose grub-screw or ConCentra locking for true bidirectional shafts. Collar geometry for this size: over the 14 mm outer-ring width the inner ring runs to 21 mm overall (30.5 mm including the eccentric collar width), giving the collar its eccentric seating face clear of the seal.", "applications": [ "light drive rollers with plain commercial shafts", "small garden machinery and rotavators", "lawn and turf equipment" ], "failure_modes": [ "collar set screw not locked into its recess: the collar unwinds and the bearing walks off its seat", "eccentric collar mounted against rotation direction works loose and spins, fretting the shaft", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "The eccentric collar is handed to running direction; fit it wrong on the 20 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "Overall width 30.5 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YET collar.", "Catalogue ratings belong to YET 204 as the ecc one open execution; other order numbers of the YET 204 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YET-204?", "a": "Boundary dimensions: bore 20 mm, sphered OD 47 mm, overall width 21 mm (30.5 mm with the collar); weight 160 g. Loads: dynamic 12.7 kN, static 6.55 kN, fatigue 0.28 kN; the only published speed is the 8,500 r/min limiting value." }, { "q": "What does the designation YET 204 mean?", "a": "YET means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on one side. the size code 204 carries the usual bore arithmetic — 20 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. with no -2F/-2RF suffix the order number denotes the open external execution of the YEL2 size — add external exclusion at the housing and plan relubrication intervals for dusty or wet surroundings." }, { "q": "How does the eccentric locking collar work?", "a": "The collar has an eccentric bore matching an eccentric on the inner ring extension. After sliding it on, turn it in the shaft's running direction until it grips, then tighten the collar's own set screw into its recess. Rotation then self-tightens rather than loosens the lock." }, { "q": "Why is the collar sometimes wider than the bearing (B1)?", "a": "The B1 dimension includes the eccentric collar's axial width, so the housing needs that extra space beside the bearing. Draw housings to B1, not B, when replacing a grub-screw unit with a collar unit." } ], "cross_ref": [ { "equiv_sku": "YET-204-VL065", "equiv_brand": "SKF", "level": "full", "note": "Same 20x47x21 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YET 204/VL065 is the eccentric collar locking, one-side-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YET-204", "YET 204" ], "locale_variants": {} }, { "sku": "YET-204-VL065", "brand": "SKF", "manufacturer_designation": "YET 204/VL065", "series": "YEL2-series", "type": "insert", "d_mm": 20, "D_mm": 47, "B_mm": 21, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 12.7, "static_load_kN": 6.55, "fatigue_load_limit_kN": 0.28, "limiting_speed_rpm": 8500, "max_rpm": 8500, "weight_g": 160, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YET 204/VL065 is SKF's 20 mm-bore eccentric-locking-collar insert bearing with a one-side-extended inner ring in the YEL2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 20x47x21 mm. The deep-groove ball set is built into an extended inner ring carrying a separate eccentric locking collar; turning the collar against its eccentric seat pinches the shaft, and the sphered outer ring self-aligns in the housing. the YET prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended one side. the size code 204 carries the usual bore arithmetic — 20 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. /VL065 means the inner-ring bore and side faces are zinc coated: corrosion protection on the shaft seating and abutment faces without changing the seal package or the carbon-steel outer ring. Envelope 20x47x21 mm (0.787x1.85x0.827 in), outer ring 14 mm wide, C 12.7 kN, C0 6.55 kN, Pu 0.28 kN. Mounted width B1 30.5 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 8,500 r/min; mass 160 g. Width accounting: B1 30.5 mm covers the bearing WITH its eccentric locking collar against 21 mm for the bearing itself and 14 mm outer-ring width; housing axial space is drawn to B1, seal replacement space to B. Capacity density: 12.7 kN from 0.160 kg of bearing steel is about 79.375 kN per kilogram, and per width millimetre the 21 mm unit carries 0.605 kN of dynamic capacity. At the printed limiting speed of 8,500 r/min the mean diameter dm = 33.5 mm implies dn about 2.85x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Load balance for documentation: C0 6.55 kN against C 12.7 kN gives a 0.516 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Selection figures for YET 204/VL065: C0/C is 0.516, Pu 0.28 kN is 2.205 % of the 12.7 kN dynamic rating, and the 160 g catalogue mass works out to roughly 8 g per millimetre of the 20 mm bore. Zinc-coated one-side collar note: the VL065 layer protects the inner-ring bore and abutment faces; the eccentric collar itself is uncoated, so grease the collar-back interface to keep the zinc-free face from corroding fast to the inner ring. Collar geometry for this size: over the 14 mm outer-ring width the inner ring runs to 21 mm overall (30.5 mm including the eccentric collar width), giving the collar its eccentric seating face clear of the seal.", "applications": [ "small garden machinery and rotavators", "lawn and turf equipment", "light drive rollers with plain commercial shafts" ], "failure_modes": [ "eccentric collar mounted against rotation direction works loose and spins, fretting the shaft", "burr or paint under the eccentric faces prevents full bite, leaving an eccentric preload that runs hot", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "Overall width 30.5 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YET collar.", "The eccentric collar is handed to running direction; fit it wrong on the 20 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Ordering discipline for the 20 mm size: the chapter lists several executions side by side (YEL2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YET-204-VL065?", "a": "YET 204/VL065 measures 20 mm bore x 47 mm OD x 21 mm overall width (outer ring 14 mm wide), 0.787 x 1.85 x 0.827 in; mass about 160 g. SKF 17000 ratings: C 12.7 kN, C0 6.55 kN, Pu 0.28 kN, limiting speed 8,500 r/min." }, { "q": "What does the designation YET 204/VL065 mean?", "a": "the YET prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended one side. the size code 204 carries the usual bore arithmetic — 20 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. /VL065 means the inner-ring bore and side faces are zinc coated: corrosion protection on the shaft seating and abutment faces without changing the seal package or the carbon-steel outer ring." }, { "q": "Can eccentric-collar bearings run in both directions?", "a": "They are intended for one predominant running direction; true reversing drives can unwind the eccentric. For bidirectional or vibrating shafts choose grub-screw or SKF ConCentra (YSP) locking." }, { "q": "How does the eccentric locking collar work?", "a": "The collar has an eccentric bore matching an eccentric on the inner ring extension. After sliding it on, turn it in the shaft's running direction until it grips, then tighten the collar's own set screw into its recess. Rotation then self-tightens rather than loosens the lock." } ], "cross_ref": [ { "equiv_sku": "YET-204", "equiv_brand": "SKF", "level": "full", "note": "Same 20x47x21 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YET 204 is the eccentric collar locking, one-side-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YET-204-VL065", "YET 204/VL065" ], "locale_variants": {} }, { "sku": "YELAG-204", "brand": "SKF", "manufacturer_designation": "YELAG 204", "series": "YEL2-series", "type": "insert", "d_mm": 20, "D_mm": 47, "B_mm": 34.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 12.7, "static_load_kN": 6.55, "fatigue_load_limit_kN": 0.28, "limiting_speed_rpm": 1800, "max_rpm": 1800, "weight_g": 200, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YEL2 series order number YELAG 204 is a SKF insert bearing (Y-bearing) for a 20 mm shaft: eccentric-locking-collar insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 47 mm. Inside sits a sealed ball insert with an eccentric collar on the extended ring: collar bite locks the shaft, the contact seals retain the life grease, and the spherical OD floats in the Y-housing. YEL means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on both sides. the size code 204 carries the usual bore arithmetic — 20 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the AG suffix identifies the farm-duty variant of the range: sealed and flinger-protected for chaff and dust, with the catalogue deliberately derating its permissible speed versus the industrial execution. Envelope 20x47x34.2 mm (0.787x1.85x1.346 in), outer ring 14 mm wide, C 12.7 kN, C0 6.55 kN, Pu 0.28 kN. Mounted width B1 43.7 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 1,800 r/min; mass 200 g. At the printed limiting speed of 1,800 r/min the mean diameter dm = 33.5 mm implies dn about 0.60x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Load balance for documentation: C0 6.55 kN against C 12.7 kN gives a 0.516 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Mass-to-load ratio for YELAG-204: 15.748 g of catalogue mass per rated kN of C, and 10 g per millimetre of bore — useful when comparing executions of the same 20x47 mm envelope on the drawing. Imperial procurement cross-check: 0.787 in bore, 1.85 in OD, 1.346 in overall width; the 200 g mass converts to 0.200 kg (7.1 oz) for the bill of materials. Rating split for the maintenance file: dynamic 12.7 kN (L10), static 6.55 kN (s0 shock check), fatigue 0.28 kN (adjusted life) — three separate uses for YELAG 204, none interchangeable with another. Direction rule for YELAG-204: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 20 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "small garden machinery and rotavators", "light drive rollers with plain commercial shafts", "lawn and turf equipment" ], "failure_modes": [ "burr or paint under the eccentric faces prevents full bite, leaving an eccentric preload that runs hot", "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "Overall width 43.7 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "The eccentric collar is handed to running direction; fit it wrong on the 20 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "The 12.7/6.55 kN figures belong specifically to YELAG 204; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YELAG-204?", "a": "Boundary dimensions: bore 20 mm, sphered OD 47 mm, overall width 34.2 mm (43.7 mm with the collar); weight 200 g. Loads: dynamic 12.7 kN, static 6.55 kN, fatigue 0.28 kN; the only published speed is the 1,800 r/min limiting value." }, { "q": "What does the designation YELAG 204 mean?", "a": "YEL means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on both sides. the size code 204 carries the usual bore arithmetic — 20 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the AG suffix identifies the farm-duty variant of the range: sealed and flinger-protected for chaff and dust, with the catalogue deliberately derating its permissible speed versus the industrial execution." }, { "q": "What is the difference between YET and YEL?", "a": "YET has the inner ring extended on one side; YEL extends it on both sides. Both lock with the eccentric collar and share bore/OD geometry; the sealed -2F executions sit in the YEL listings." }, { "q": "Can eccentric-collar bearings run in both directions?", "a": "They are intended for one predominant running direction; true reversing drives can unwind the eccentric. For bidirectional or vibrating shafts choose grub-screw or SKF ConCentra (YSP) locking." } ], "cross_ref": [ { "equiv_sku": "YEL-204-2RF-VL065", "equiv_brand": "SKF", "level": "full", "note": "Same 20x47x34.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 204-2RF/VL065 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YEL-204-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 20x47x34.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 204-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YELAG-204", "YELAG 204" ], "locale_variants": {} }, { "sku": "YEL-204-2RF-VL065", "brand": "SKF", "manufacturer_designation": "YEL 204-2RF/VL065", "series": "YEL2-series", "type": "insert", "d_mm": 20, "D_mm": 47, "B_mm": 34.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 12.7, "static_load_kN": 6.55, "fatigue_load_limit_kN": 0.28, "limiting_speed_rpm": 5000, "max_rpm": 5000, "weight_g": 200, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YEL 204-2RF/VL065 is a eccentric-locking-collar insert bearing with the inner ring extended on both sides, 20x47x34.2 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction pairs capped deep-groove geometry with a one-piece eccentric locking collar and a convex outer ring — quick to mount on plain commercial shafts and tolerant of initial static misalignment. reading YEL: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended symmetrically both sides. the size code 204 carries the usual bore arithmetic — 20 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. VL065 adds zinc coating exactly where the inner ring meets the shaft and abutments; the rest of the bearing follows the standard design of the YEL2 size. Envelope 20x47x34.2 mm (0.787x1.85x1.346 in), outer ring 14 mm wide, C 12.7 kN, C0 6.55 kN, Pu 0.28 kN. Mounted width B1 43.7 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 5,000 r/min; mass 200 g. Spherical-seat note in numbers: the 47 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 33.5 = 105.243 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Pitch-diameter arithmetic: dm = (20+47)/2 = 33.5 mm; at the 5,000 r/min limiting speed the ball set runs at dn approx 1.68x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. At the printed limiting speed of 5,000 r/min the mean diameter dm = 33.5 mm implies dn about 1.68x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Mass-to-load ratio for YEL-204-2RF-VL065: 15.748 g of catalogue mass per rated kN of C, and 10 g per millimetre of bore — useful when comparing executions of the same 20x47 mm envelope on the drawing. Load balance for documentation: C0 6.55 kN against C 12.7 kN gives a 0.516 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Sealed zinc-coated collar note: VL065 covers the inner-ring bore and side faces under the -2RF seal set; the galvanized bore is slightly larger after coating, so use shafts in the lower half of the SKF tolerance band to avoid a skrink-fit that prevents collar removal. Collar geometry for this size: over the 14 mm outer-ring width the inner ring runs to 34.2 mm overall (43.7 mm including the eccentric collar width), giving the collar its eccentric seating face clear of the seal.", "applications": [ "light drive rollers with plain commercial shafts", "lawn and turf equipment", "small garden machinery and rotavators" ], "failure_modes": [ "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "collar set screw not locked into its recess: the collar unwinds and the bearing walks off its seat", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "The eccentric collar is handed to running direction; fit it wrong on the 20 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Overall width 43.7 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "Ordering discipline for the 20 mm size: the chapter lists several executions side by side (YEL2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YEL-204-2RF-VL065?", "a": "The catalogue envelope is 20x47x34.2 mm with a spherical outside surface; mass 200 g. Ratings C 12.7/6.55 kN, Pu 0.28 kN, limiting speed 5,000 r/min." }, { "q": "What does the designation YEL 204-2RF/VL065 mean?", "a": "reading YEL: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended symmetrically both sides. the size code 204 carries the usual bore arithmetic — 20 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. VL065 adds zinc coating exactly where the inner ring meets the shaft and abutments; the rest of the bearing follows the standard design of the YEL2 size." }, { "q": "How does the eccentric locking collar work?", "a": "The collar has an eccentric bore matching an eccentric on the inner ring extension. After sliding it on, turn it in the shaft's running direction until it grips, then tighten the collar's own set screw into its recess. Rotation then self-tightens rather than loosens the lock." }, { "q": "Why is the collar sometimes wider than the bearing (B1)?", "a": "The B1 dimension includes the eccentric collar's axial width, so the housing needs that extra space beside the bearing. Draw housings to B1, not B, when replacing a grub-screw unit with a collar unit." } ], "cross_ref": [ { "equiv_sku": "YELAG-204", "equiv_brand": "SKF", "level": "full", "note": "Same 20x47x34.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 204 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YEL-204-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 20x47x34.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 204-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YEL-204-2RF-VL065", "YEL 204-2RF/VL065" ], "locale_variants": {} }, { "sku": "YEL-204-2F", "brand": "SKF", "manufacturer_designation": "YEL 204-2F", "series": "YEL2-series", "type": "insert", "d_mm": 20, "D_mm": 47, "B_mm": 34.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 12.7, "static_load_kN": 6.55, "fatigue_load_limit_kN": 0.28, "limiting_speed_rpm": 8500, "max_rpm": 8500, "weight_g": 200, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YEL 204-2F is a eccentric-locking-collar insert bearing with the inner ring extended on both sides, 20x47x34.2 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction pairs capped deep-groove geometry with a one-piece eccentric locking collar and a convex outer ring — quick to mount on plain commercial shafts and tolerant of initial static misalignment. reading YEL: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended symmetrically both sides. the size code 204 carries the usual bore arithmetic — 20 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution. Envelope 20x47x34.2 mm (0.787x1.85x1.346 in), outer ring 14 mm wide, C 12.7 kN, C0 6.55 kN, Pu 0.28 kN. Mounted width B1 43.7 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 8,500 r/min; mass 200 g. Rating split for the maintenance file: dynamic 12.7 kN (L10), static 6.55 kN (s0 shock check), fatigue 0.28 kN (adjusted life) — three separate uses for YEL 204-2F, none interchangeable with another. Capacity density: 12.7 kN from 0.200 kg of bearing steel is about 63.5 kN per kilogram, and per width millimetre the 34.2 mm unit carries 0.371 kN of dynamic capacity. Outer-vs-overall width: the outer ring is 14 mm wide inside the 34.2 mm total, so the extended inner ring accounts for 0.591 of the overall width (10.1 mm of axial projection per side). Static-first planning: the 0.192 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 20 mm shaft, not the 12.7 kN L10 value. Speed ceiling of 8,500 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Two-side sealed collar note: after driving the eccentric collar tight, lock the collar set screw against its recess and verify the collar cannot be turned by hand; a collar that was merely pressed on without the eccentric bite spins on the shaft and frets it within hours. Collar geometry for this size: over the 14 mm outer-ring width the inner ring runs to 34.2 mm overall (43.7 mm including the eccentric collar width), giving the collar its eccentric seating face clear of the seal.", "applications": [ "lawn and turf equipment", "light drive rollers with plain commercial shafts", "small garden machinery and rotavators" ], "failure_modes": [ "burr or paint under the eccentric faces prevents full bite, leaving an eccentric preload that runs hot", "collar set screw not locked into its recess: the collar unwinds and the bearing walks off its seat", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "Overall width 43.7 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "The eccentric collar is handed to running direction; fit it wrong on the 20 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "The 12.7/6.55 kN figures belong specifically to YEL 204-2F; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YEL-204-2F?", "a": "The catalogue envelope is 20x47x34.2 mm with a spherical outside surface; mass 200 g. Ratings C 12.7/6.55 kN, Pu 0.28 kN, limiting speed 8,500 r/min." }, { "q": "What does the designation YEL 204-2F mean?", "a": "reading YEL: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended symmetrically both sides. the size code 204 carries the usual bore arithmetic — 20 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution." }, { "q": "Can eccentric-collar bearings run in both directions?", "a": "They are intended for one predominant running direction; true reversing drives can unwind the eccentric. For bidirectional or vibrating shafts choose grub-screw or SKF ConCentra (YSP) locking." }, { "q": "How does the eccentric locking collar work?", "a": "The collar has an eccentric bore matching an eccentric on the inner ring extension. After sliding it on, turn it in the shaft's running direction until it grips, then tighten the collar's own set screw into its recess. Rotation then self-tightens rather than loosens the lock." } ], "cross_ref": [ { "equiv_sku": "YELAG-204", "equiv_brand": "SKF", "level": "full", "note": "Same 20x47x34.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 204 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YEL-204-2RF-VL065", "equiv_brand": "SKF", "level": "full", "note": "Same 20x47x34.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 204-2RF/VL065 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YEL-204-2F", "YEL 204-2F" ], "locale_variants": {} }, { "sku": "YET-205", "brand": "SKF", "manufacturer_designation": "YET 205", "series": "YEL2-series", "type": "insert", "d_mm": 25, "D_mm": 52, "B_mm": 21.5, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 14, "static_load_kN": 7.8, "fatigue_load_limit_kN": 0.335, "limiting_speed_rpm": 7000, "max_rpm": 7000, "weight_g": 200, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YET 205 is SKF's 25 mm-bore eccentric-locking-collar insert bearing with a one-side-extended inner ring in the YEL2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 25x52x21.5 mm. The deep-groove ball set is built into an extended inner ring carrying a separate eccentric locking collar; turning the collar against its eccentric seat pinches the shaft, and the sphered outer ring self-aligns in the housing. the YET prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended one side. the size code 205 carries the usual bore arithmetic — 25 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. this suffix-free execution is listed without the sealed external design: the 21.5 mm width is the one-side-extended inner ring alone, so protection depends on the housing seals and the relubrication routine rather than bearing-mounted contact seals. Envelope 25x52x21.5 mm (0.984x2.047x0.846 in), outer ring 15 mm wide, C 14 kN, C0 7.8 kN, Pu 0.335 kN. Mounted width B1 31 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 7,000 r/min; mass 200 g. Load balance for documentation: C0 7.8 kN against C 14 kN gives a 0.557 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Outer-vs-overall width: the outer ring is 15 mm wide inside the 21.5 mm total, so the extended inner ring accounts for 0.302 of the overall width (6.5 mm of axial projection on the locking side). Imperial procurement cross-check: 0.984 in bore, 2.047 in OD, 0.846 in overall width; the 200 g mass converts to 0.200 kg (7.1 oz) for the bill of materials. Pitch-diameter arithmetic: dm = (25+52)/2 = 38.5 mm; at the 7,000 r/min limiting speed the ball set runs at dn approx 2.69x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Fatigue-limit check: Pu 0.335 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YET 205 — most belt-driven mounted-unit loads sit comfortably under 2.393 % of C. One-side collar note: the eccentric collar mounts on the extended side only and must turn in the shaft rotation direction to self-tighten; on reversing drives this design can loosen by design intent — choose grub-screw or ConCentra locking for true bidirectional shafts. Direction rule for YET-205: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 25 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "agricultural machinery PTO-driven shafts", "ventilation equipment with frequent bearing changes", "tiller and cultivator rotors" ], "failure_modes": [ "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "burr or paint under the eccentric faces prevents full bite, leaving an eccentric preload that runs hot", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "The eccentric collar is handed to running direction; fit it wrong on the 25 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "Overall width 31 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YET collar.", "Catalogue ratings belong to YET 205 as the ecc one open execution; other order numbers of the YET 205 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YET-205?", "a": "YET 205 measures 25 mm bore x 52 mm OD x 21.5 mm overall width (outer ring 15 mm wide), 0.984 x 2.047 x 0.846 in; mass about 200 g. SKF 17000 ratings: C 14 kN, C0 7.8 kN, Pu 0.335 kN, limiting speed 7,000 r/min." }, { "q": "What does the designation YET 205 mean?", "a": "the YET prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended one side. the size code 205 carries the usual bore arithmetic — 25 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. this suffix-free execution is listed without the sealed external design: the 21.5 mm width is the one-side-extended inner ring alone, so protection depends on the housing seals and the relubrication routine rather than bearing-mounted contact seals." }, { "q": "Can eccentric-collar bearings run in both directions?", "a": "They are intended for one predominant running direction; true reversing drives can unwind the eccentric. For bidirectional or vibrating shafts choose grub-screw or SKF ConCentra (YSP) locking." }, { "q": "How does the eccentric locking collar work?", "a": "The collar has an eccentric bore matching an eccentric on the inner ring extension. After sliding it on, turn it in the shaft's running direction until it grips, then tighten the collar's own set screw into its recess. Rotation then self-tightens rather than loosens the lock." } ], "cross_ref": [ { "equiv_sku": "YET-205-VL065", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x21.5 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YET 205/VL065 is the eccentric collar locking, one-side-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YET-205-100", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x21.5 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YET 205-100 is the eccentric collar locking, one-side-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YET-205", "YET 205" ], "locale_variants": {} }, { "sku": "YET-205-VL065", "brand": "SKF", "manufacturer_designation": "YET 205/VL065", "series": "YEL2-series", "type": "insert", "d_mm": 25, "D_mm": 52, "B_mm": 21.5, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 14, "static_load_kN": 7.8, "fatigue_load_limit_kN": 0.335, "limiting_speed_rpm": 7000, "max_rpm": 7000, "weight_g": 200, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YET 205/VL065 is a eccentric-locking-collar insert bearing with a one-side-extended inner ring, 25x52x21.5 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction pairs capped deep-groove geometry with a one-piece eccentric locking collar and a convex outer ring — quick to mount on plain commercial shafts and tolerant of initial static misalignment. reading YET: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended on one side. the size code 205 carries the usual bore arithmetic — 25 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. VL065 adds zinc coating exactly where the inner ring meets the shaft and abutments; the rest of the bearing follows the standard design of the YEL2 size. Envelope 25x52x21.5 mm (0.984x2.047x0.846 in), outer ring 15 mm wide, C 14 kN, C0 7.8 kN, Pu 0.335 kN. Mounted width B1 31 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 7,000 r/min; mass 200 g. Grease-life arithmetic is dominated by speed: at dn approx 2.69x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Imperial procurement cross-check: 0.984 in bore, 2.047 in OD, 0.846 in overall width; the 200 g mass converts to 0.200 kg (7.1 oz) for the bill of materials. Fillet discipline: the printed r_min 0.6 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 25x52 mm insert on its chamfer tilts the whole spherical seat. The s1 23.5 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. At the printed limiting speed of 7,000 r/min the mean diameter dm = 38.5 mm implies dn about 2.69x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Zinc-coated one-side collar note: the VL065 layer protects the inner-ring bore and abutment faces; the eccentric collar itself is uncoated, so grease the collar-back interface to keep the zinc-free face from corroding fast to the inner ring. Direction rule for YET-205-VL065: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 25 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "ventilation equipment with frequent bearing changes", "agricultural machinery PTO-driven shafts", "tiller and cultivator rotors" ], "failure_modes": [ "burr or paint under the eccentric faces prevents full bite, leaving an eccentric preload that runs hot", "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "relubricated with incompatible grease that hardens the factory fill and drags the seals" ], "pitfalls": [ "The eccentric collar is handed to running direction; fit it wrong on the 25 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Overall width 31 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YET collar.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "Catalogue ratings belong to YET 205/VL065 as the ecc one vl065 execution; other order numbers of the YET 205 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YET-205-VL065?", "a": "The catalogue envelope is 25x52x21.5 mm with a spherical outside surface; mass 200 g. Ratings C 14/7.8 kN, Pu 0.335 kN, limiting speed 7,000 r/min." }, { "q": "What does the designation YET 205/VL065 mean?", "a": "reading YET: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended on one side. the size code 205 carries the usual bore arithmetic — 25 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. VL065 adds zinc coating exactly where the inner ring meets the shaft and abutments; the rest of the bearing follows the standard design of the YEL2 size." }, { "q": "What is the difference between YET and YEL?", "a": "YET has the inner ring extended on one side; YEL extends it on both sides. Both lock with the eccentric collar and share bore/OD geometry; the sealed -2F executions sit in the YEL listings." }, { "q": "Can eccentric-collar bearings run in both directions?", "a": "They are intended for one predominant running direction; true reversing drives can unwind the eccentric. For bidirectional or vibrating shafts choose grub-screw or SKF ConCentra (YSP) locking." } ], "cross_ref": [ { "equiv_sku": "YET-205", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x21.5 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YET 205 is the eccentric collar locking, one-side-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YET-205-100", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x21.5 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YET 205-100 is the eccentric collar locking, one-side-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YET-205-VL065", "YET 205/VL065" ], "locale_variants": {} }, { "sku": "YELAG-205", "brand": "SKF", "manufacturer_designation": "YELAG 205", "series": "YEL2-series", "type": "insert", "d_mm": 25, "D_mm": 52, "B_mm": 34.9, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 14, "static_load_kN": 7.8, "fatigue_load_limit_kN": 0.335, "limiting_speed_rpm": 1500, "max_rpm": 1500, "weight_g": 240, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YELAG 205 is a eccentric-locking-collar insert bearing with the inner ring extended on both sides, 25x52x34.9 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction pairs capped deep-groove geometry with a one-piece eccentric locking collar and a convex outer ring — quick to mount on plain commercial shafts and tolerant of initial static misalignment. reading YEL: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended symmetrically both sides. the size code 205 carries the usual bore arithmetic — 25 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery. Envelope 25x52x34.9 mm (0.984x2.047x1.374 in), outer ring 15 mm wide, C 14 kN, C0 7.8 kN, Pu 0.335 kN. Mounted width B1 44.4 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 1,500 r/min; mass 240 g. Grease-life arithmetic is dominated by speed: at dn approx 0.58x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the AG variant caps speed so aggressively, and high-temperature mounts shorten both even when load is light. At the printed limiting speed of 1,500 r/min the mean diameter dm = 38.5 mm implies dn about 0.58x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 33.7 mm, d2 37.4 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the inner flinger. Static-first planning: the 0.223 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 25 mm shaft, not the 14 kN L10 value. Fatigue-limit check: Pu 0.335 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YELAG 205 — most belt-driven mounted-unit loads sit comfortably under 2.393 % of C. Collar geometry for this size: over the 15 mm outer-ring width the inner ring runs to 34.9 mm overall (44.4 mm including the eccentric collar width), giving the collar its eccentric seating face clear of the seal.", "applications": [ "ventilation equipment with frequent bearing changes", "one-direction conveyor drives", "tiller and cultivator rotors" ], "failure_modes": [ "burr or paint under the eccentric faces prevents full bite, leaving an eccentric preload that runs hot", "eccentric collar mounted against rotation direction works loose and spins, fretting the shaft", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "The eccentric collar is handed to running direction; fit it wrong on the 25 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Overall width 44.4 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "Catalogue ratings belong to YELAG 205 as the ecc two ag execution; other order numbers of the YELAG 205 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YELAG-205?", "a": "The catalogue envelope is 25x52x34.9 mm with a spherical outside surface; mass 240 g. Ratings C 14/7.8 kN, Pu 0.335 kN, limiting speed 1,500 r/min." }, { "q": "What does the designation YELAG 205 mean?", "a": "reading YEL: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended symmetrically both sides. the size code 205 carries the usual bore arithmetic — 25 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery." }, { "q": "Why is the collar sometimes wider than the bearing (B1)?", "a": "The B1 dimension includes the eccentric collar's axial width, so the housing needs that extra space beside the bearing. Draw housings to B1, not B, when replacing a grub-screw unit with a collar unit." }, { "q": "What is the difference between YET and YEL?", "a": "YET has the inner ring extended on one side; YEL extends it on both sides. Both lock with the eccentric collar and share bore/OD geometry; the sealed -2F executions sit in the YEL listings." } ], "cross_ref": [ { "equiv_sku": "YEL-205-2RF-VL065", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 205-2RF/VL065 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YEL-205-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 205-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YELAG-205-100", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 205-100 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YEL-205-100-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 205-100-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YELAG-205", "YELAG 205" ], "locale_variants": {} }, { "sku": "YEL-205-2RF-VL065", "brand": "SKF", "manufacturer_designation": "YEL 205-2RF/VL065", "series": "YEL2-series", "type": "insert", "d_mm": 25, "D_mm": 52, "B_mm": 34.9, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 14, "static_load_kN": 7.8, "fatigue_load_limit_kN": 0.335, "limiting_speed_rpm": 4300, "max_rpm": 4300, "weight_g": 250, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YEL 205-2RF/VL065 is SKF's 25 mm-bore eccentric-locking-collar insert bearing with the inner ring extended on both sides in the YEL2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 25x52x34.9 mm. The deep-groove ball set is built into an extended inner ring carrying a separate eccentric locking collar; turning the collar against its eccentric seat pinches the shaft, and the sphered outer ring self-aligns in the housing. the YEL prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended both sides. the size code 205 carries the usual bore arithmetic — 25 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. /VL065 means the inner-ring bore and side faces are zinc coated: corrosion protection on the shaft seating and abutment faces without changing the seal package or the carbon-steel outer ring. Envelope 25x52x34.9 mm (0.984x2.047x1.374 in), outer ring 15 mm wide, C 14 kN, C0 7.8 kN, Pu 0.335 kN. Mounted width B1 44.4 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 4,300 r/min; mass 250 g. The s1 26.9 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. At the printed limiting speed of 4,300 r/min the mean diameter dm = 38.5 mm implies dn about 1.66x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Bore-to-OD planning: OD 52 over bore 25 is a 2.08x step, while bore/overall-width gives 0.716; the spherical seat in the matching Y-housing must be specified to the 52 mm OD, not to a cylindrical housing bore. Pitch-diameter arithmetic: dm = (25+52)/2 = 38.5 mm; at the 4,300 r/min limiting speed the ball set runs at dn approx 1.66x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Width accounting: B1 44.4 mm covers the bearing WITH its eccentric locking collar against 34.9 mm for the bearing itself and 15 mm outer-ring width; housing axial space is drawn to B1, seal replacement space to B. Sealed zinc-coated collar note: VL065 covers the inner-ring bore and side faces under the -2RF seal set; the galvanized bore is slightly larger after coating, so use shafts in the lower half of the SKF tolerance band to avoid a skrink-fit that prevents collar removal. Direction rule for YEL-205-2RF-VL065: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 25 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "agricultural machinery PTO-driven shafts", "one-direction conveyor drives", "ventilation equipment with frequent bearing changes" ], "failure_modes": [ "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "eccentric collar mounted against rotation direction works loose and spins, fretting the shaft", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "Overall width 44.4 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "The eccentric collar is handed to running direction; fit it wrong on the 25 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "The 14/7.8 kN figures belong specifically to YEL 205-2RF/VL065; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YEL-205-2RF-VL065?", "a": "YEL 205-2RF/VL065 measures 25 mm bore x 52 mm OD x 34.9 mm overall width (outer ring 15 mm wide), 0.984 x 2.047 x 1.374 in; mass about 250 g. SKF 17000 ratings: C 14 kN, C0 7.8 kN, Pu 0.335 kN, limiting speed 4,300 r/min." }, { "q": "What does the designation YEL 205-2RF/VL065 mean?", "a": "the YEL prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended both sides. the size code 205 carries the usual bore arithmetic — 25 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. /VL065 means the inner-ring bore and side faces are zinc coated: corrosion protection on the shaft seating and abutment faces without changing the seal package or the carbon-steel outer ring." }, { "q": "Why is the collar sometimes wider than the bearing (B1)?", "a": "The B1 dimension includes the eccentric collar's axial width, so the housing needs that extra space beside the bearing. Draw housings to B1, not B, when replacing a grub-screw unit with a collar unit." }, { "q": "What is the difference between YET and YEL?", "a": "YET has the inner ring extended on one side; YEL extends it on both sides. Both lock with the eccentric collar and share bore/OD geometry; the sealed -2F executions sit in the YEL listings." } ], "cross_ref": [ { "equiv_sku": "YELAG-205", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 205 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YEL-205-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 205-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YELAG-205-100", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 205-100 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YEL-205-100-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 205-100-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YEL-205-2RF-VL065", "YEL 205-2RF/VL065" ], "locale_variants": {} }, { "sku": "YEL-205-2F", "brand": "SKF", "manufacturer_designation": "YEL 205-2F", "series": "YEL2-series", "type": "insert", "d_mm": 25, "D_mm": 52, "B_mm": 34.9, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 14, "static_load_kN": 7.8, "fatigue_load_limit_kN": 0.335, "limiting_speed_rpm": 7000, "max_rpm": 7000, "weight_g": 240, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YEL2 series order number YEL 205-2F is a SKF insert bearing (Y-bearing) for a 25 mm shaft: eccentric-locking-collar insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 52 mm. Inside sits a sealed ball insert with an eccentric collar on the extended ring: collar bite locks the shaft, the contact seals retain the life grease, and the spherical OD floats in the Y-housing. YEL means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on both sides. the size code 205 carries the usual bore arithmetic — 25 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 25x52x34.9 mm (0.984x2.047x1.374 in), outer ring 15 mm wide, C 14 kN, C0 7.8 kN, Pu 0.335 kN. Mounted width B1 44.4 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 7,000 r/min; mass 240 g. Fillet discipline: the printed r_min 0.6 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 25x52 mm insert on its chamfer tilts the whole spherical seat. Bore-to-OD planning: OD 52 over bore 25 is a 2.08x step, while bore/overall-width gives 0.716; the spherical seat in the matching Y-housing must be specified to the 52 mm OD, not to a cylindrical housing bore. Width accounting: B1 44.4 mm covers the bearing WITH its eccentric locking collar against 34.9 mm for the bearing itself and 15 mm outer-ring width; housing axial space is drawn to B1, seal replacement space to B. Pitch-diameter arithmetic: dm = (25+52)/2 = 38.5 mm; at the 7,000 r/min limiting speed the ball set runs at dn approx 2.69x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Spherical-seat note in numbers: the 52 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 38.5 = 120.951 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Two-side sealed collar note: after driving the eccentric collar tight, lock the collar set screw against its recess and verify the collar cannot be turned by hand; a collar that was merely pressed on without the eccentric bite spins on the shaft and frets it within hours. Collar geometry for this size: over the 15 mm outer-ring width the inner ring runs to 34.9 mm overall (44.4 mm including the eccentric collar width), giving the collar its eccentric seating face clear of the seal.", "applications": [ "tiller and cultivator rotors", "one-direction conveyor drives", "agricultural machinery PTO-driven shafts" ], "failure_modes": [ "collar set screw not locked into its recess: the collar unwinds and the bearing walks off its seat", "eccentric collar mounted against rotation direction works loose and spins, fretting the shaft", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "relubricated with incompatible grease that hardens the factory fill and drags the seals" ], "pitfalls": [ "Overall width 44.4 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "The eccentric collar is handed to running direction; fit it wrong on the 25 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "The 14/7.8 kN figures belong specifically to YEL 205-2F; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YEL-205-2F?", "a": "Boundary dimensions: bore 25 mm, sphered OD 52 mm, overall width 34.9 mm (44.4 mm with the collar); weight 240 g. Loads: dynamic 14 kN, static 7.8 kN, fatigue 0.335 kN; the only published speed is the 7,000 r/min limiting value." }, { "q": "What does the designation YEL 205-2F mean?", "a": "YEL means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on both sides. the size code 205 carries the usual bore arithmetic — 25 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "How does the eccentric locking collar work?", "a": "The collar has an eccentric bore matching an eccentric on the inner ring extension. After sliding it on, turn it in the shaft's running direction until it grips, then tighten the collar's own set screw into its recess. Rotation then self-tightens rather than loosens the lock." }, { "q": "Why is the collar sometimes wider than the bearing (B1)?", "a": "The B1 dimension includes the eccentric collar's axial width, so the housing needs that extra space beside the bearing. Draw housings to B1, not B, when replacing a grub-screw unit with a collar unit." } ], "cross_ref": [ { "equiv_sku": "YELAG-205", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 205 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YEL-205-2RF-VL065", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 205-2RF/VL065 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YELAG-205-100", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 205-100 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YEL-205-100-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x34.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 205-100-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YEL-205-2F", "YEL 205-2F" ], "locale_variants": {} }, { "sku": "YET-206", "brand": "SKF", "manufacturer_designation": "YET 206", "series": "YEL2-series", "type": "insert", "d_mm": 30, "D_mm": 62, "B_mm": 23.8, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 19.5, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 6300, "max_rpm": 6300, "weight_g": 320, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YET 206 is SKF's 30 mm-bore eccentric-locking-collar insert bearing with a one-side-extended inner ring in the YEL2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 30x62x23.8 mm. The deep-groove ball set is built into an extended inner ring carrying a separate eccentric locking collar; turning the collar against its eccentric seat pinches the shaft, and the sphered outer ring self-aligns in the housing. the YET prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended one side. the size code 206 carries the usual bore arithmetic — 30 mm (code 06 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. this suffix-free execution is listed without the sealed external design: the 23.8 mm width is the one-side-extended inner ring alone, so protection depends on the housing seals and the relubrication routine rather than bearing-mounted contact seals. Envelope 30x62x23.8 mm (1.181x2.441x0.937 in), outer ring 18 mm wide, C 19.5 kN, C0 11.2 kN, Pu 0.475 kN. Mounted width B1 35.7 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 6,300 r/min; mass 320 g. Envelope arithmetic: the radial section from 30 mm bore to 62 mm OD is 16 mm; dividing C 19.5 kN by that section gives 1.219 kN per section millimetre, and the 23.8 mm overall width is 1.488x the section. The s1 26.7 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Rating split for the maintenance file: dynamic 19.5 kN (L10), static 11.2 kN (s0 shock check), fatigue 0.475 kN (adjusted life) — three separate uses for YET 206, none interchangeable with another. Bore-to-OD planning: OD 62 over bore 30 is a 2.067x step, while bore/overall-width gives 1.261; the spherical seat in the matching Y-housing must be specified to the 62 mm OD, not to a cylindrical housing bore. Speed ceiling of 6,300 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. One-side collar note: the eccentric collar mounts on the extended side only and must turn in the shaft rotation direction to self-tighten; on reversing drives this design can loosen by design intent — choose grub-screw or ConCentra locking for true bidirectional shafts. Collar geometry for this size: over the 18 mm outer-ring width the inner ring runs to 23.8 mm overall (35.7 mm including the eccentric collar width), giving the collar its eccentric seating face clear of the seal.", "applications": [ "tiller and cultivator rotors", "agricultural machinery PTO-driven shafts", "one-direction conveyor drives" ], "failure_modes": [ "collar set screw not locked into its recess: the collar unwinds and the bearing walks off its seat", "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "The eccentric collar is handed to running direction; fit it wrong on the 30 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Overall width 35.7 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YET collar.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "Catalogue ratings belong to YET 206 as the ecc one open execution; other order numbers of the YET 206 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YET-206?", "a": "YET 206 measures 30 mm bore x 62 mm OD x 23.8 mm overall width (outer ring 18 mm wide), 1.181 x 2.441 x 0.937 in; mass about 320 g. SKF 17000 ratings: C 19.5 kN, C0 11.2 kN, Pu 0.475 kN, limiting speed 6,300 r/min." }, { "q": "What does the designation YET 206 mean?", "a": "the YET prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended one side. the size code 206 carries the usual bore arithmetic — 30 mm (code 06 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. this suffix-free execution is listed without the sealed external design: the 23.8 mm width is the one-side-extended inner ring alone, so protection depends on the housing seals and the relubrication routine rather than bearing-mounted contact seals." }, { "q": "What is the difference between YET and YEL?", "a": "YET has the inner ring extended on one side; YEL extends it on both sides. Both lock with the eccentric collar and share bore/OD geometry; the sealed -2F executions sit in the YEL listings." }, { "q": "Can eccentric-collar bearings run in both directions?", "a": "They are intended for one predominant running direction; true reversing drives can unwind the eccentric. For bidirectional or vibrating shafts choose grub-screw or SKF ConCentra (YSP) locking." } ], "cross_ref": [ { "equiv_sku": "YET-206-VL065", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x23.8 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YET 206/VL065 is the eccentric collar locking, one-side-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YET-206-103", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x23.8 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YET 206-103 is the eccentric collar locking, one-side-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YET-206", "YET 206" ], "locale_variants": {} }, { "sku": "YET-206-VL065", "brand": "SKF", "manufacturer_designation": "YET 206/VL065", "series": "YEL2-series", "type": "insert", "d_mm": 30, "D_mm": 62, "B_mm": 23.8, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 19.5, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 6300, "max_rpm": 6300, "weight_g": 320, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YET 206/VL065 is SKF's 30 mm-bore eccentric-locking-collar insert bearing with a one-side-extended inner ring in the YEL2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 30x62x23.8 mm. The deep-groove ball set is built into an extended inner ring carrying a separate eccentric locking collar; turning the collar against its eccentric seat pinches the shaft, and the sphered outer ring self-aligns in the housing. the YET prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended one side. the size code 206 carries the usual bore arithmetic — 30 mm (code 06 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. /VL065 means the inner-ring bore and side faces are zinc coated: corrosion protection on the shaft seating and abutment faces without changing the seal package or the carbon-steel outer ring. Envelope 30x62x23.8 mm (1.181x2.441x0.937 in), outer ring 18 mm wide, C 19.5 kN, C0 11.2 kN, Pu 0.475 kN. Mounted width B1 35.7 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 6,300 r/min; mass 320 g. Outer-vs-overall width: the outer ring is 18 mm wide inside the 23.8 mm total, so the extended inner ring accounts for 0.244 of the overall width (5.8 mm of axial projection on the locking side). Grease-life arithmetic is dominated by speed: at dn approx 2.90x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Width accounting: B1 35.7 mm covers the bearing WITH its eccentric locking collar against 23.8 mm for the bearing itself and 18 mm outer-ring width; housing axial space is drawn to B1, seal replacement space to B. Static-first planning: the 0.471 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 30 mm shaft, not the 19.5 kN L10 value. Bore-to-OD planning: OD 62 over bore 30 is a 2.067x step, while bore/overall-width gives 1.261; the spherical seat in the matching Y-housing must be specified to the 62 mm OD, not to a cylindrical housing bore. Zinc-coated one-side collar note: the VL065 layer protects the inner-ring bore and abutment faces; the eccentric collar itself is uncoated, so grease the collar-back interface to keep the zinc-free face from corroding fast to the inner ring. Collar geometry for this size: over the 18 mm outer-ring width the inner ring runs to 23.8 mm overall (35.7 mm including the eccentric collar width), giving the collar its eccentric seating face clear of the seal.", "applications": [ "one-direction conveyor drives", "agricultural machinery PTO-driven shafts", "ventilation equipment with frequent bearing changes" ], "failure_modes": [ "eccentric collar mounted against rotation direction works loose and spins, fretting the shaft", "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "relubricated with incompatible grease that hardens the factory fill and drags the seals" ], "pitfalls": [ "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "Overall width 35.7 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YET collar.", "The eccentric collar is handed to running direction; fit it wrong on the 30 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Ordering discipline for the 30 mm size: the chapter lists several executions side by side (YEL2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YET-206-VL065?", "a": "YET 206/VL065 measures 30 mm bore x 62 mm OD x 23.8 mm overall width (outer ring 18 mm wide), 1.181 x 2.441 x 0.937 in; mass about 320 g. SKF 17000 ratings: C 19.5 kN, C0 11.2 kN, Pu 0.475 kN, limiting speed 6,300 r/min." }, { "q": "What does the designation YET 206/VL065 mean?", "a": "the YET prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended one side. the size code 206 carries the usual bore arithmetic — 30 mm (code 06 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. /VL065 means the inner-ring bore and side faces are zinc coated: corrosion protection on the shaft seating and abutment faces without changing the seal package or the carbon-steel outer ring." }, { "q": "Why is the collar sometimes wider than the bearing (B1)?", "a": "The B1 dimension includes the eccentric collar's axial width, so the housing needs that extra space beside the bearing. Draw housings to B1, not B, when replacing a grub-screw unit with a collar unit." }, { "q": "What is the difference between YET and YEL?", "a": "YET has the inner ring extended on one side; YEL extends it on both sides. Both lock with the eccentric collar and share bore/OD geometry; the sealed -2F executions sit in the YEL listings." } ], "cross_ref": [ { "equiv_sku": "YET-206", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x23.8 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YET 206 is the eccentric collar locking, one-side-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YET-206-103", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x23.8 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YET 206-103 is the eccentric collar locking, one-side-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YET-206-VL065", "YET 206/VL065" ], "locale_variants": {} }, { "sku": "YELAG-206", "brand": "SKF", "manufacturer_designation": "YELAG 206", "series": "YEL2-series", "type": "insert", "d_mm": 30, "D_mm": 62, "B_mm": 36.5, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 19.5, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 1200, "max_rpm": 1200, "weight_g": 380, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YELAG 206 is SKF's 30 mm-bore eccentric-locking-collar insert bearing with the inner ring extended on both sides in the YEL2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 30x62x36.5 mm. The deep-groove ball set is built into an extended inner ring carrying a separate eccentric locking collar; turning the collar against its eccentric seat pinches the shaft, and the sphered outer ring self-aligns in the housing. the YEL prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended both sides. the size code 206 carries the usual bore arithmetic — 30 mm (code 06 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. AG marks the agricultural-machinery application execution, built on the sealed both-sides-extended geometry and tuned for the low-speed, shock-laden duty of harvesters, balers and spreaders — note the catalogue prints a much reduced limiting speed for this variant. Envelope 30x62x36.5 mm (1.181x2.441x1.437 in), outer ring 18 mm wide, C 19.5 kN, C0 11.2 kN, Pu 0.475 kN. Mounted width B1 48.4 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 1,200 r/min; mass 380 g. Width accounting: B1 48.4 mm covers the bearing WITH its eccentric locking collar against 36.5 mm for the bearing itself and 18 mm outer-ring width; housing axial space is drawn to B1, seal replacement space to B. Pitch-diameter arithmetic: dm = (30+62)/2 = 46 mm; at the 1,200 r/min limiting speed the ball set runs at dn approx 0.55x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Fillet discipline: the printed r_min 0.6 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 30x62 mm insert on its chamfer tilts the whole spherical seat. Load balance for documentation: C0 11.2 kN against C 19.5 kN gives a 0.574 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Bore-to-OD planning: OD 62 over bore 30 is a 2.067x step, while bore/overall-width gives 0.822; the spherical seat in the matching Y-housing must be specified to the 62 mm OD, not to a cylindrical housing bore. Direction rule for YELAG-206: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 30 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "one-direction conveyor drives", "tiller and cultivator rotors", "agricultural machinery PTO-driven shafts" ], "failure_modes": [ "eccentric collar mounted against rotation direction works loose and spins, fretting the shaft", "collar set screw not locked into its recess: the collar unwinds and the bearing walks off its seat", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "The eccentric collar is handed to running direction; fit it wrong on the 30 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "Overall width 48.4 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "Catalogue ratings belong to YELAG 206 as the ecc two ag execution; other order numbers of the YELAG 206 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YELAG-206?", "a": "YELAG 206 measures 30 mm bore x 62 mm OD x 36.5 mm overall width (outer ring 18 mm wide), 1.181 x 2.441 x 1.437 in; mass about 380 g. SKF 17000 ratings: C 19.5 kN, C0 11.2 kN, Pu 0.475 kN, limiting speed 1,200 r/min." }, { "q": "What does the designation YELAG 206 mean?", "a": "the YEL prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended both sides. the size code 206 carries the usual bore arithmetic — 30 mm (code 06 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. AG marks the agricultural-machinery application execution, built on the sealed both-sides-extended geometry and tuned for the low-speed, shock-laden duty of harvesters, balers and spreaders — note the catalogue prints a much reduced limiting speed for this variant." }, { "q": "How does the eccentric locking collar work?", "a": "The collar has an eccentric bore matching an eccentric on the inner ring extension. After sliding it on, turn it in the shaft's running direction until it grips, then tighten the collar's own set screw into its recess. Rotation then self-tightens rather than loosens the lock." }, { "q": "Why is the collar sometimes wider than the bearing (B1)?", "a": "The B1 dimension includes the eccentric collar's axial width, so the housing needs that extra space beside the bearing. Draw housings to B1, not B, when replacing a grub-screw unit with a collar unit." } ], "cross_ref": [ { "equiv_sku": "YEL-206-2RF-VL065", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x36.5 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 206-2RF/VL065 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YEL-206-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x36.5 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 206-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YELAG-206-103", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x36.5 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 206-103 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YEL-206-103-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x36.5 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 206-103-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YELAG-206", "YELAG 206" ], "locale_variants": {} }, { "sku": "YEL-206-2RF-VL065", "brand": "SKF", "manufacturer_designation": "YEL 206-2RF/VL065", "series": "YEL2-series", "type": "insert", "d_mm": 30, "D_mm": 62, "B_mm": 36.5, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 19.5, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 3800, "max_rpm": 3800, "weight_g": 380, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YEL 206-2RF/VL065 is SKF's 30 mm-bore eccentric-locking-collar insert bearing with the inner ring extended on both sides in the YEL2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 30x62x36.5 mm. The deep-groove ball set is built into an extended inner ring carrying a separate eccentric locking collar; turning the collar against its eccentric seat pinches the shaft, and the sphered outer ring self-aligns in the housing. the YEL prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended both sides. the size code 206 carries the usual bore arithmetic — 30 mm (code 06 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. /VL065 means the inner-ring bore and side faces are zinc coated: corrosion protection on the shaft seating and abutment faces without changing the seal package or the carbon-steel outer ring. Envelope 30x62x36.5 mm (1.181x2.441x1.437 in), outer ring 18 mm wide, C 19.5 kN, C0 11.2 kN, Pu 0.475 kN. Mounted width B1 48.4 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 3,800 r/min; mass 380 g. Imperial procurement cross-check: 1.181 in bore, 2.441 in OD, 1.437 in overall width; the 380 g mass converts to 0.380 kg (13.4 oz) for the bill of materials. Speed ceiling of 3,800 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Bore-to-OD planning: OD 62 over bore 30 is a 2.067x step, while bore/overall-width gives 0.822; the spherical seat in the matching Y-housing must be specified to the 62 mm OD, not to a cylindrical housing bore. Pitch-diameter arithmetic: dm = (30+62)/2 = 46 mm; at the 3,800 r/min limiting speed the ball set runs at dn approx 1.75x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Width accounting: B1 48.4 mm covers the bearing WITH its eccentric locking collar against 36.5 mm for the bearing itself and 18 mm outer-ring width; housing axial space is drawn to B1, seal replacement space to B. Sealed zinc-coated collar note: VL065 covers the inner-ring bore and side faces under the -2RF seal set; the galvanized bore is slightly larger after coating, so use shafts in the lower half of the SKF tolerance band to avoid a skrink-fit that prevents collar removal. Collar geometry for this size: over the 18 mm outer-ring width the inner ring runs to 36.5 mm overall (48.4 mm including the eccentric collar width), giving the collar its eccentric seating face clear of the seal.", "applications": [ "agricultural machinery PTO-driven shafts", "ventilation equipment with frequent bearing changes", "tiller and cultivator rotors" ], "failure_modes": [ "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "burr or paint under the eccentric faces prevents full bite, leaving an eccentric preload that runs hot", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "The eccentric collar is handed to running direction; fit it wrong on the 30 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Overall width 48.4 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "Catalogue ratings belong to YEL 206-2RF/VL065 as the ecc two vl065 execution; other order numbers of the YEL 206 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YEL-206-2RF-VL065?", "a": "YEL 206-2RF/VL065 measures 30 mm bore x 62 mm OD x 36.5 mm overall width (outer ring 18 mm wide), 1.181 x 2.441 x 1.437 in; mass about 380 g. SKF 17000 ratings: C 19.5 kN, C0 11.2 kN, Pu 0.475 kN, limiting speed 3,800 r/min." }, { "q": "What does the designation YEL 206-2RF/VL065 mean?", "a": "the YEL prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended both sides. the size code 206 carries the usual bore arithmetic — 30 mm (code 06 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. /VL065 means the inner-ring bore and side faces are zinc coated: corrosion protection on the shaft seating and abutment faces without changing the seal package or the carbon-steel outer ring." }, { "q": "What is the difference between YET and YEL?", "a": "YET has the inner ring extended on one side; YEL extends it on both sides. Both lock with the eccentric collar and share bore/OD geometry; the sealed -2F executions sit in the YEL listings." }, { "q": "Can eccentric-collar bearings run in both directions?", "a": "They are intended for one predominant running direction; true reversing drives can unwind the eccentric. For bidirectional or vibrating shafts choose grub-screw or SKF ConCentra (YSP) locking." } ], "cross_ref": [ { "equiv_sku": "YELAG-206", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x36.5 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 206 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YEL-206-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x36.5 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 206-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YELAG-206-103", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x36.5 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 206-103 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YEL-206-103-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x36.5 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 206-103-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YEL-206-2RF-VL065", "YEL 206-2RF/VL065" ], "locale_variants": {} }, { "sku": "YEL-206-2F", "brand": "SKF", "manufacturer_designation": "YEL 206-2F", "series": "YEL2-series", "type": "insert", "d_mm": 30, "D_mm": 62, "B_mm": 36.5, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 19.5, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 6300, "max_rpm": 6300, "weight_g": 380, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YEL 206-2F is SKF's 30 mm-bore eccentric-locking-collar insert bearing with the inner ring extended on both sides in the YEL2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 30x62x36.5 mm. The deep-groove ball set is built into an extended inner ring carrying a separate eccentric locking collar; turning the collar against its eccentric seat pinches the shaft, and the sphered outer ring self-aligns in the housing. the YEL prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended both sides. the size code 206 carries the usual bore arithmetic — 30 mm (code 06 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 30x62x36.5 mm (1.181x2.441x1.437 in), outer ring 18 mm wide, C 19.5 kN, C0 11.2 kN, Pu 0.475 kN. Mounted width B1 48.4 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 6,300 r/min; mass 380 g. Grease-life arithmetic is dominated by speed: at dn approx 2.90x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Rating split for the maintenance file: dynamic 19.5 kN (L10), static 11.2 kN (s0 shock check), fatigue 0.475 kN (adjusted life) — three separate uses for YEL 206-2F, none interchangeable with another. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 39.7 mm, d2 44.1 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the plain flinger. Load balance for documentation: C0 11.2 kN against C 19.5 kN gives a 0.574 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Envelope arithmetic: the radial section from 30 mm bore to 62 mm OD is 16 mm; dividing C 19.5 kN by that section gives 1.219 kN per section millimetre, and the 36.5 mm overall width is 2.281x the section. Two-side sealed collar note: after driving the eccentric collar tight, lock the collar set screw against its recess and verify the collar cannot be turned by hand; a collar that was merely pressed on without the eccentric bite spins on the shaft and frets it within hours. Collar geometry for this size: over the 18 mm outer-ring width the inner ring runs to 36.5 mm overall (48.4 mm including the eccentric collar width), giving the collar its eccentric seating face clear of the seal.", "applications": [ "ventilation equipment with frequent bearing changes", "one-direction conveyor drives", "tiller and cultivator rotors" ], "failure_modes": [ "burr or paint under the eccentric faces prevents full bite, leaving an eccentric preload that runs hot", "eccentric collar mounted against rotation direction works loose and spins, fretting the shaft", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "Overall width 48.4 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "The eccentric collar is handed to running direction; fit it wrong on the 30 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Ordering discipline for the 30 mm size: the chapter lists several executions side by side (YEL2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YEL-206-2F?", "a": "YEL 206-2F measures 30 mm bore x 62 mm OD x 36.5 mm overall width (outer ring 18 mm wide), 1.181 x 2.441 x 1.437 in; mass about 380 g. SKF 17000 ratings: C 19.5 kN, C0 11.2 kN, Pu 0.475 kN, limiting speed 6,300 r/min." }, { "q": "What does the designation YEL 206-2F mean?", "a": "the YEL prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended both sides. the size code 206 carries the usual bore arithmetic — 30 mm (code 06 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "Why is the collar sometimes wider than the bearing (B1)?", "a": "The B1 dimension includes the eccentric collar's axial width, so the housing needs that extra space beside the bearing. Draw housings to B1, not B, when replacing a grub-screw unit with a collar unit." }, { "q": "What is the difference between YET and YEL?", "a": "YET has the inner ring extended on one side; YEL extends it on both sides. Both lock with the eccentric collar and share bore/OD geometry; the sealed -2F executions sit in the YEL listings." } ], "cross_ref": [ { "equiv_sku": "YELAG-206", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x36.5 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 206 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YEL-206-2RF-VL065", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x36.5 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 206-2RF/VL065 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YELAG-206-103", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x36.5 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 206-103 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YEL-206-103-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x36.5 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 206-103-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YEL-206-2F", "YEL 206-2F" ], "locale_variants": {} }, { "sku": "YET-207", "brand": "SKF", "manufacturer_designation": "YET 207", "series": "YEL2-series", "type": "insert", "d_mm": 35, "D_mm": 72, "B_mm": 25.4, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 5300, "max_rpm": 5300, "weight_g": 460, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YEL2 series order number YET 207 is a SKF insert bearing (Y-bearing) for a 35 mm shaft: eccentric-locking-collar insert bearing with a one-side-extended inner ring, built to the ISO 15 diameter-series envelope with a sphered OD of 72 mm. Inside sits a sealed ball insert with an eccentric collar on the extended ring: collar bite locks the shaft, the contact seals retain the life grease, and the spherical OD floats in the Y-housing. YET means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on one side. the size code 207 carries the usual bore arithmetic — 35 mm (code 07 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. with no -2F/-2RF suffix the order number denotes the open external execution of the YEL2 size — add external exclusion at the housing and plan relubrication intervals for dusty or wet surroundings. Envelope 35x72x25.4 mm (1.378x2.835x1 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. Mounted width B1 38.9 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 5,300 r/min; mass 460 g. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 35x72 mm insert on its chamfer tilts the whole spherical seat. Fatigue-limit check: Pu 0.655 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YET 207 — most belt-driven mounted-unit loads sit comfortably under 2.569 % of C. Spherical-seat note in numbers: the 72 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 53.5 = 168.075 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Capacity density: 25.5 kN from 0.460 kg of bearing steel is about 55.435 kN per kilogram, and per width millimetre the 25.4 mm unit carries 1.004 kN of dynamic capacity. Static-first planning: the 0.602 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 35 mm shaft, not the 25.5 kN L10 value. One-side collar note: the eccentric collar mounts on the extended side only and must turn in the shaft rotation direction to self-tighten; on reversing drives this design can loosen by design intent — choose grub-screw or ConCentra locking for true bidirectional shafts. Direction rule for YET-207: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 35 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "tiller and cultivator rotors", "one-direction conveyor drives", "agricultural machinery PTO-driven shafts" ], "failure_modes": [ "collar set screw not locked into its recess: the collar unwinds and the bearing walks off its seat", "eccentric collar mounted against rotation direction works loose and spins, fretting the shaft", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "Overall width 38.9 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YET collar.", "The eccentric collar is handed to running direction; fit it wrong on the 35 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Ordering discipline for the 35 mm size: the chapter lists several executions side by side (YEL2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YET-207?", "a": "Boundary dimensions: bore 35 mm, sphered OD 72 mm, overall width 25.4 mm (38.9 mm with the collar); weight 460 g. Loads: dynamic 25.5 kN, static 15.3 kN, fatigue 0.655 kN; the only published speed is the 5,300 r/min limiting value." }, { "q": "What does the designation YET 207 mean?", "a": "YET means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on one side. the size code 207 carries the usual bore arithmetic — 35 mm (code 07 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. with no -2F/-2RF suffix the order number denotes the open external execution of the YEL2 size — add external exclusion at the housing and plan relubrication intervals for dusty or wet surroundings." }, { "q": "Why is the collar sometimes wider than the bearing (B1)?", "a": "The B1 dimension includes the eccentric collar's axial width, so the housing needs that extra space beside the bearing. Draw housings to B1, not B, when replacing a grub-screw unit with a collar unit." }, { "q": "What is the difference between YET and YEL?", "a": "YET has the inner ring extended on one side; YEL extends it on both sides. Both lock with the eccentric collar and share bore/OD geometry; the sealed -2F executions sit in the YEL listings." } ], "cross_ref": [ { "equiv_sku": "YET-207-VL065", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x25.4 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YET 207/VL065 is the eccentric collar locking, one-side-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YET-207-106", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x25.4 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YET 207-106 is the eccentric collar locking, one-side-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YET-207", "YET 207" ], "locale_variants": {} }, { "sku": "YET-207-VL065", "brand": "SKF", "manufacturer_designation": "YET 207/VL065", "series": "YEL2-series", "type": "insert", "d_mm": 35, "D_mm": 72, "B_mm": 25.4, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 5300, "max_rpm": 5300, "weight_g": 460, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YET 207/VL065 is SKF's 35 mm-bore eccentric-locking-collar insert bearing with a one-side-extended inner ring in the YEL2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 35x72x25.4 mm. The deep-groove ball set is built into an extended inner ring carrying a separate eccentric locking collar; turning the collar against its eccentric seat pinches the shaft, and the sphered outer ring self-aligns in the housing. the YET prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended one side. the size code 207 carries the usual bore arithmetic — 35 mm (code 07 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. /VL065 means the inner-ring bore and side faces are zinc coated: corrosion protection on the shaft seating and abutment faces without changing the seal package or the carbon-steel outer ring. Envelope 35x72x25.4 mm (1.378x2.835x1 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. Mounted width B1 38.9 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 5,300 r/min; mass 460 g. Width accounting: B1 38.9 mm covers the bearing WITH its eccentric locking collar against 25.4 mm for the bearing itself and 19 mm outer-ring width; housing axial space is drawn to B1, seal replacement space to B. Envelope arithmetic: the radial section from 35 mm bore to 72 mm OD is 18.5 mm; dividing C 25.5 kN by that section gives 1.378 kN per section millimetre, and the 25.4 mm overall width is 1.373x the section. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 35x72 mm insert on its chamfer tilts the whole spherical seat. Static-first planning: the 0.602 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 35 mm shaft, not the 25.5 kN L10 value. Capacity density: 25.5 kN from 0.460 kg of bearing steel is about 55.435 kN per kilogram, and per width millimetre the 25.4 mm unit carries 1.004 kN of dynamic capacity. Zinc-coated one-side collar note: the VL065 layer protects the inner-ring bore and abutment faces; the eccentric collar itself is uncoated, so grease the collar-back interface to keep the zinc-free face from corroding fast to the inner ring. Direction rule for YET-207-VL065: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 35 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "one-direction conveyor drives", "tiller and cultivator rotors", "agricultural machinery PTO-driven shafts" ], "failure_modes": [ "eccentric collar mounted against rotation direction works loose and spins, fretting the shaft", "collar set screw not locked into its recess: the collar unwinds and the bearing walks off its seat", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "relubricated with incompatible grease that hardens the factory fill and drags the seals" ], "pitfalls": [ "Overall width 38.9 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YET collar.", "The eccentric collar is handed to running direction; fit it wrong on the 35 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "The 25.5/15.3 kN figures belong specifically to YET 207/VL065; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YET-207-VL065?", "a": "YET 207/VL065 measures 35 mm bore x 72 mm OD x 25.4 mm overall width (outer ring 19 mm wide), 1.378 x 2.835 x 1 in; mass about 460 g. SKF 17000 ratings: C 25.5 kN, C0 15.3 kN, Pu 0.655 kN, limiting speed 5,300 r/min." }, { "q": "What does the designation YET 207/VL065 mean?", "a": "the YET prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended one side. the size code 207 carries the usual bore arithmetic — 35 mm (code 07 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. /VL065 means the inner-ring bore and side faces are zinc coated: corrosion protection on the shaft seating and abutment faces without changing the seal package or the carbon-steel outer ring." }, { "q": "How does the eccentric locking collar work?", "a": "The collar has an eccentric bore matching an eccentric on the inner ring extension. After sliding it on, turn it in the shaft's running direction until it grips, then tighten the collar's own set screw into its recess. Rotation then self-tightens rather than loosens the lock." }, { "q": "Why is the collar sometimes wider than the bearing (B1)?", "a": "The B1 dimension includes the eccentric collar's axial width, so the housing needs that extra space beside the bearing. Draw housings to B1, not B, when replacing a grub-screw unit with a collar unit." } ], "cross_ref": [ { "equiv_sku": "YET-207", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x25.4 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YET 207 is the eccentric collar locking, one-side-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YET-207-106", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x25.4 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YET 207-106 is the eccentric collar locking, one-side-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YET-207-VL065", "YET 207/VL065" ], "locale_variants": {} }, { "sku": "YELAG-207", "brand": "SKF", "manufacturer_designation": "YELAG 207", "series": "YEL2-series", "type": "insert", "d_mm": 35, "D_mm": 72, "B_mm": 37.6, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 1100, "max_rpm": 1100, "weight_g": 530, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YELAG 207 is a eccentric-locking-collar insert bearing with the inner ring extended on both sides, 35x72x37.6 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction pairs capped deep-groove geometry with a one-piece eccentric locking collar and a convex outer ring — quick to mount on plain commercial shafts and tolerant of initial static misalignment. reading YEL: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended symmetrically both sides. the size code 207 carries the usual bore arithmetic — 35 mm (code 07 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery. Envelope 35x72x37.6 mm (1.378x2.835x1.48 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. Mounted width B1 51.1 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 1,100 r/min; mass 530 g. Imperial procurement cross-check: 1.378 in bore, 2.835 in OD, 1.48 in overall width; the 530 g mass converts to 0.530 kg (18.7 oz) for the bill of materials. Outer-vs-overall width: the outer ring is 19 mm wide inside the 37.6 mm total, so the extended inner ring accounts for 0.495 of the overall width (9.3 mm of axial projection per side). Load balance for documentation: C0 15.3 kN against C 25.5 kN gives a 0.6 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 35x72 mm insert on its chamfer tilts the whole spherical seat. Grease-life arithmetic is dominated by speed: at dn approx 0.59x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the AG variant caps speed so aggressively, and high-temperature mounts shorten both even when load is light. Direction rule for YELAG-207: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 35 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "agricultural machinery PTO-driven shafts", "ventilation equipment with frequent bearing changes", "tiller and cultivator rotors" ], "failure_modes": [ "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "burr or paint under the eccentric faces prevents full bite, leaving an eccentric preload that runs hot", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "Overall width 51.1 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "The eccentric collar is handed to running direction; fit it wrong on the 35 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "The 25.5/15.3 kN figures belong specifically to YELAG 207; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YELAG-207?", "a": "The catalogue envelope is 35x72x37.6 mm with a spherical outside surface; mass 530 g. Ratings C 25.5/15.3 kN, Pu 0.655 kN, limiting speed 1,100 r/min." }, { "q": "What does the designation YELAG 207 mean?", "a": "reading YEL: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended symmetrically both sides. the size code 207 carries the usual bore arithmetic — 35 mm (code 07 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery." }, { "q": "Can eccentric-collar bearings run in both directions?", "a": "They are intended for one predominant running direction; true reversing drives can unwind the eccentric. For bidirectional or vibrating shafts choose grub-screw or SKF ConCentra (YSP) locking." }, { "q": "How does the eccentric locking collar work?", "a": "The collar has an eccentric bore matching an eccentric on the inner ring extension. After sliding it on, turn it in the shaft's running direction until it grips, then tighten the collar's own set screw into its recess. Rotation then self-tightens rather than loosens the lock." } ], "cross_ref": [ { "equiv_sku": "YEL-207-2RF-VL065", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x37.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 207-2RF/VL065 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YEL-207-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x37.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 207-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YELAG-207-106", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x37.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 207-106 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YEL-207-106-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x37.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 207-106-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YELAG-207", "YELAG 207" ], "locale_variants": {} }, { "sku": "YEL-207-2RF-VL065", "brand": "SKF", "manufacturer_designation": "YEL 207-2RF/VL065", "series": "YEL2-series", "type": "insert", "d_mm": 35, "D_mm": 72, "B_mm": 37.6, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 3200, "max_rpm": 3200, "weight_g": 540, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YEL 207-2RF/VL065 is a eccentric-locking-collar insert bearing with the inner ring extended on both sides, 35x72x37.6 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction pairs capped deep-groove geometry with a one-piece eccentric locking collar and a convex outer ring — quick to mount on plain commercial shafts and tolerant of initial static misalignment. reading YEL: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended symmetrically both sides. the size code 207 carries the usual bore arithmetic — 35 mm (code 07 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. VL065 adds zinc coating exactly where the inner ring meets the shaft and abutments; the rest of the bearing follows the standard design of the YEL2 size. Envelope 35x72x37.6 mm (1.378x2.835x1.48 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. Mounted width B1 51.1 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 3,200 r/min; mass 540 g. Selection figures for YEL 207-2RF/VL065: C0/C is 0.6, Pu 0.655 kN is 2.569 % of the 25.5 kN dynamic rating, and the 540 g catalogue mass works out to roughly 15.429 g per millimetre of the 35 mm bore. Capacity density: 25.5 kN from 0.540 kg of bearing steel is about 47.222 kN per kilogram, and per width millimetre the 37.6 mm unit carries 0.678 kN of dynamic capacity. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 46.1 mm, d2 51.1 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the inner flinger. Spherical-seat note in numbers: the 72 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 53.5 = 168.075 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Imperial procurement cross-check: 1.378 in bore, 2.835 in OD, 1.48 in overall width; the 540 g mass converts to 0.540 kg (19.0 oz) for the bill of materials. Sealed zinc-coated collar note: VL065 covers the inner-ring bore and side faces under the -2RF seal set; the galvanized bore is slightly larger after coating, so use shafts in the lower half of the SKF tolerance band to avoid a skrink-fit that prevents collar removal. Collar geometry for this size: over the 19 mm outer-ring width the inner ring runs to 37.6 mm overall (51.1 mm including the eccentric collar width), giving the collar its eccentric seating face clear of the seal.", "applications": [ "one-direction conveyor drives", "ventilation equipment with frequent bearing changes", "agricultural machinery PTO-driven shafts" ], "failure_modes": [ "eccentric collar mounted against rotation direction works loose and spins, fretting the shaft", "burr or paint under the eccentric faces prevents full bite, leaving an eccentric preload that runs hot", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "The eccentric collar is handed to running direction; fit it wrong on the 35 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Overall width 51.1 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "Catalogue ratings belong to YEL 207-2RF/VL065 as the ecc two vl065 execution; other order numbers of the YEL 207 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YEL-207-2RF-VL065?", "a": "The catalogue envelope is 35x72x37.6 mm with a spherical outside surface; mass 540 g. Ratings C 25.5/15.3 kN, Pu 0.655 kN, limiting speed 3,200 r/min." }, { "q": "What does the designation YEL 207-2RF/VL065 mean?", "a": "reading YEL: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended symmetrically both sides. the size code 207 carries the usual bore arithmetic — 35 mm (code 07 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. VL065 adds zinc coating exactly where the inner ring meets the shaft and abutments; the rest of the bearing follows the standard design of the YEL2 size." }, { "q": "Can eccentric-collar bearings run in both directions?", "a": "They are intended for one predominant running direction; true reversing drives can unwind the eccentric. For bidirectional or vibrating shafts choose grub-screw or SKF ConCentra (YSP) locking." }, { "q": "How does the eccentric locking collar work?", "a": "The collar has an eccentric bore matching an eccentric on the inner ring extension. After sliding it on, turn it in the shaft's running direction until it grips, then tighten the collar's own set screw into its recess. Rotation then self-tightens rather than loosens the lock." } ], "cross_ref": [ { "equiv_sku": "YELAG-207", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x37.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 207 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YEL-207-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x37.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 207-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YELAG-207-106", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x37.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 207-106 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YEL-207-106-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x37.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 207-106-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YEL-207-2RF-VL065", "YEL 207-2RF/VL065" ], "locale_variants": {} }, { "sku": "YEL-207-2F", "brand": "SKF", "manufacturer_designation": "YEL 207-2F", "series": "YEL2-series", "type": "insert", "d_mm": 35, "D_mm": 72, "B_mm": 37.6, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 5300, "max_rpm": 5300, "weight_g": 540, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YEL 207-2F is a eccentric-locking-collar insert bearing with the inner ring extended on both sides, 35x72x37.6 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction pairs capped deep-groove geometry with a one-piece eccentric locking collar and a convex outer ring — quick to mount on plain commercial shafts and tolerant of initial static misalignment. reading YEL: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended symmetrically both sides. the size code 207 carries the usual bore arithmetic — 35 mm (code 07 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution. Envelope 35x72x37.6 mm (1.378x2.835x1.48 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. Mounted width B1 51.1 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 5,300 r/min; mass 540 g. At the printed limiting speed of 5,300 r/min the mean diameter dm = 53.5 mm implies dn about 2.84x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Load balance for documentation: C0 15.3 kN against C 25.5 kN gives a 0.6 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 35x72 mm insert on its chamfer tilts the whole spherical seat. Spherical-seat note in numbers: the 72 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 53.5 = 168.075 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. The s1 32.3 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Two-side sealed collar note: after driving the eccentric collar tight, lock the collar set screw against its recess and verify the collar cannot be turned by hand; a collar that was merely pressed on without the eccentric bite spins on the shaft and frets it within hours. Direction rule for YEL-207-2F: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 35 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "ventilation equipment with frequent bearing changes", "agricultural machinery PTO-driven shafts", "tiller and cultivator rotors" ], "failure_modes": [ "burr or paint under the eccentric faces prevents full bite, leaving an eccentric preload that runs hot", "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "The eccentric collar is handed to running direction; fit it wrong on the 35 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Overall width 51.1 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "Catalogue ratings belong to YEL 207-2F as the ecc two f execution; other order numbers of the YEL 207 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YEL-207-2F?", "a": "The catalogue envelope is 35x72x37.6 mm with a spherical outside surface; mass 540 g. Ratings C 25.5/15.3 kN, Pu 0.655 kN, limiting speed 5,300 r/min." }, { "q": "What does the designation YEL 207-2F mean?", "a": "reading YEL: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended symmetrically both sides. the size code 207 carries the usual bore arithmetic — 35 mm (code 07 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution." }, { "q": "What is the difference between YET and YEL?", "a": "YET has the inner ring extended on one side; YEL extends it on both sides. Both lock with the eccentric collar and share bore/OD geometry; the sealed -2F executions sit in the YEL listings." }, { "q": "Can eccentric-collar bearings run in both directions?", "a": "They are intended for one predominant running direction; true reversing drives can unwind the eccentric. For bidirectional or vibrating shafts choose grub-screw or SKF ConCentra (YSP) locking." } ], "cross_ref": [ { "equiv_sku": "YELAG-207", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x37.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 207 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YEL-207-2RF-VL065", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x37.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 207-2RF/VL065 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YELAG-207-106", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x37.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 207-106 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YEL-207-106-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x37.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 207-106-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YEL-207-2F", "YEL 207-2F" ], "locale_variants": {} }, { "sku": "YET-208", "brand": "SKF", "manufacturer_designation": "YET 208", "series": "YEL2-series", "type": "insert", "d_mm": 40, "D_mm": 80, "B_mm": 29.7, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 30.7, "static_load_kN": 19, "fatigue_load_limit_kN": 0.8, "limiting_speed_rpm": 4800, "max_rpm": 4800, "weight_g": 600, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YET 208 is SKF's 40 mm-bore eccentric-locking-collar insert bearing with a one-side-extended inner ring in the YEL2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 40x80x29.7 mm. The deep-groove ball set is built into an extended inner ring carrying a separate eccentric locking collar; turning the collar against its eccentric seat pinches the shaft, and the sphered outer ring self-aligns in the housing. the YET prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended one side. the size code 208 carries the usual bore arithmetic — 40 mm (code 08 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. this suffix-free execution is listed without the sealed external design: the 29.7 mm width is the one-side-extended inner ring alone, so protection depends on the housing seals and the relubrication routine rather than bearing-mounted contact seals. Envelope 40x80x29.7 mm (1.575x3.15x1.169 in), outer ring 21 mm wide, C 30.7 kN, C0 19 kN, Pu 0.8 kN. Mounted width B1 43.2 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 4,800 r/min; mass 600 g. Imperial procurement cross-check: 1.575 in bore, 3.15 in OD, 1.169 in overall width; the 600 g mass converts to 0.600 kg (21.2 oz) for the bill of materials. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 40x80 mm insert on its chamfer tilts the whole spherical seat. At the printed limiting speed of 4,800 r/min the mean diameter dm = 60 mm implies dn about 2.88x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Bore-to-OD planning: OD 80 over bore 40 is a 2x step, while bore/overall-width gives 1.347; the spherical seat in the matching Y-housing must be specified to the 80 mm OD, not to a cylindrical housing bore. Spherical-seat note in numbers: the 80 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 60 = 188.496 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. One-side collar note: the eccentric collar mounts on the extended side only and must turn in the shaft rotation direction to self-tighten; on reversing drives this design can loosen by design intent — choose grub-screw or ConCentra locking for true bidirectional shafts. Collar geometry for this size: over the 21 mm outer-ring width the inner ring runs to 29.7 mm overall (43.2 mm including the eccentric collar width), giving the collar its eccentric seating face clear of the seal.", "applications": [ "agricultural machinery PTO-driven shafts", "tiller and cultivator rotors", "ventilation equipment with frequent bearing changes" ], "failure_modes": [ "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "collar set screw not locked into its recess: the collar unwinds and the bearing walks off its seat", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "Overall width 43.2 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YET collar.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "The eccentric collar is handed to running direction; fit it wrong on the 40 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "The 30.7/19 kN figures belong specifically to YET 208; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YET-208?", "a": "YET 208 measures 40 mm bore x 80 mm OD x 29.7 mm overall width (outer ring 21 mm wide), 1.575 x 3.15 x 1.169 in; mass about 600 g. SKF 17000 ratings: C 30.7 kN, C0 19 kN, Pu 0.8 kN, limiting speed 4,800 r/min." }, { "q": "What does the designation YET 208 mean?", "a": "the YET prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended one side. the size code 208 carries the usual bore arithmetic — 40 mm (code 08 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. this suffix-free execution is listed without the sealed external design: the 29.7 mm width is the one-side-extended inner ring alone, so protection depends on the housing seals and the relubrication routine rather than bearing-mounted contact seals." }, { "q": "How does the eccentric locking collar work?", "a": "The collar has an eccentric bore matching an eccentric on the inner ring extension. After sliding it on, turn it in the shaft's running direction until it grips, then tighten the collar's own set screw into its recess. Rotation then self-tightens rather than loosens the lock." }, { "q": "Why is the collar sometimes wider than the bearing (B1)?", "a": "The B1 dimension includes the eccentric collar's axial width, so the housing needs that extra space beside the bearing. Draw housings to B1, not B, when replacing a grub-screw unit with a collar unit." } ], "cross_ref": [ { "equiv_sku": "YET-208-VL065", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x29.7 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YET 208/VL065 is the eccentric collar locking, one-side-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YET-208", "YET 208" ], "locale_variants": {} }, { "sku": "YET-208-VL065", "brand": "SKF", "manufacturer_designation": "YET 208/VL065", "series": "YEL2-series", "type": "insert", "d_mm": 40, "D_mm": 80, "B_mm": 29.7, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 30.7, "static_load_kN": 19, "fatigue_load_limit_kN": 0.8, "limiting_speed_rpm": 4800, "max_rpm": 4800, "weight_g": 600, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YET 208/VL065 is a eccentric-locking-collar insert bearing with a one-side-extended inner ring, 40x80x29.7 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction pairs capped deep-groove geometry with a one-piece eccentric locking collar and a convex outer ring — quick to mount on plain commercial shafts and tolerant of initial static misalignment. reading YET: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended on one side. the size code 208 carries the usual bore arithmetic — 40 mm (code 08 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. VL065 adds zinc coating exactly where the inner ring meets the shaft and abutments; the rest of the bearing follows the standard design of the YEL2 size. Envelope 40x80x29.7 mm (1.575x3.15x1.169 in), outer ring 21 mm wide, C 30.7 kN, C0 19 kN, Pu 0.8 kN. Mounted width B1 43.2 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 4,800 r/min; mass 600 g. Spherical-seat note in numbers: the 80 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 60 = 188.496 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Capacity density: 30.7 kN from 0.600 kg of bearing steel is about 51.167 kN per kilogram, and per width millimetre the 29.7 mm unit carries 1.034 kN of dynamic capacity. Static-first planning: the 0.64 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 40 mm shaft, not the 30.7 kN L10 value. Bore-to-OD planning: OD 80 over bore 40 is a 2x step, while bore/overall-width gives 1.347; the spherical seat in the matching Y-housing must be specified to the 80 mm OD, not to a cylindrical housing bore. Rating split for the maintenance file: dynamic 30.7 kN (L10), static 19 kN (s0 shock check), fatigue 0.8 kN (adjusted life) — three separate uses for YET 208/VL065, none interchangeable with another. Zinc-coated one-side collar note: the VL065 layer protects the inner-ring bore and abutment faces; the eccentric collar itself is uncoated, so grease the collar-back interface to keep the zinc-free face from corroding fast to the inner ring. Direction rule for YET-208-VL065: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 40 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "agricultural machinery PTO-driven shafts", "ventilation equipment with frequent bearing changes", "tiller and cultivator rotors" ], "failure_modes": [ "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "burr or paint under the eccentric faces prevents full bite, leaving an eccentric preload that runs hot", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "Overall width 43.2 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YET collar.", "The eccentric collar is handed to running direction; fit it wrong on the 40 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "The 30.7/19 kN figures belong specifically to YET 208/VL065; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YET-208-VL065?", "a": "The catalogue envelope is 40x80x29.7 mm with a spherical outside surface; mass 600 g. Ratings C 30.7/19 kN, Pu 0.8 kN, limiting speed 4,800 r/min." }, { "q": "What does the designation YET 208/VL065 mean?", "a": "reading YET: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended on one side. the size code 208 carries the usual bore arithmetic — 40 mm (code 08 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. VL065 adds zinc coating exactly where the inner ring meets the shaft and abutments; the rest of the bearing follows the standard design of the YEL2 size." }, { "q": "Can eccentric-collar bearings run in both directions?", "a": "They are intended for one predominant running direction; true reversing drives can unwind the eccentric. For bidirectional or vibrating shafts choose grub-screw or SKF ConCentra (YSP) locking." }, { "q": "How does the eccentric locking collar work?", "a": "The collar has an eccentric bore matching an eccentric on the inner ring extension. After sliding it on, turn it in the shaft's running direction until it grips, then tighten the collar's own set screw into its recess. Rotation then self-tightens rather than loosens the lock." } ], "cross_ref": [ { "equiv_sku": "YET-208", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x29.7 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YET 208 is the eccentric collar locking, one-side-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YET-208-VL065", "YET 208/VL065" ], "locale_variants": {} }, { "sku": "YELAG-208", "brand": "SKF", "manufacturer_designation": "YELAG 208", "series": "YEL2-series", "type": "insert", "d_mm": 40, "D_mm": 80, "B_mm": 42.8, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 30.7, "static_load_kN": 19, "fatigue_load_limit_kN": 0.8, "limiting_speed_rpm": 950, "max_rpm": 950, "weight_g": 690, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YEL2 series order number YELAG 208 is a SKF insert bearing (Y-bearing) for a 40 mm shaft: eccentric-locking-collar insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 80 mm. Inside sits a sealed ball insert with an eccentric collar on the extended ring: collar bite locks the shaft, the contact seals retain the life grease, and the spherical OD floats in the Y-housing. YEL means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on both sides. the size code 208 carries the usual bore arithmetic — 40 mm (code 08 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the AG suffix identifies the farm-duty variant of the range: sealed and flinger-protected for chaff and dust, with the catalogue deliberately derating its permissible speed versus the industrial execution. Envelope 40x80x42.8 mm (1.575x3.15x1.685 in), outer ring 21 mm wide, C 30.7 kN, C0 19 kN, Pu 0.8 kN. Mounted width B1 56.3 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 950 r/min; mass 690 g. Outer-vs-overall width: the outer ring is 21 mm wide inside the 42.8 mm total, so the extended inner ring accounts for 0.509 of the overall width (10.9 mm of axial projection per side). Spherical-seat note in numbers: the 80 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 60 = 188.496 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Load balance for documentation: C0 19 kN against C 30.7 kN gives a 0.619 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Static-first planning: the 0.444 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 40 mm shaft, not the 30.7 kN L10 value. The s1 34.9 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Direction rule for YELAG-208: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 40 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "one-direction conveyor drives", "agricultural machinery PTO-driven shafts", "ventilation equipment with frequent bearing changes" ], "failure_modes": [ "eccentric collar mounted against rotation direction works loose and spins, fretting the shaft", "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "The eccentric collar is handed to running direction; fit it wrong on the 40 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Overall width 56.3 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "Catalogue ratings belong to YELAG 208 as the ecc two ag execution; other order numbers of the YELAG 208 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YELAG-208?", "a": "Boundary dimensions: bore 40 mm, sphered OD 80 mm, overall width 42.8 mm (56.3 mm with the collar); weight 690 g. Loads: dynamic 30.7 kN, static 19 kN, fatigue 0.8 kN; the only published speed is the 950 r/min limiting value." }, { "q": "What does the designation YELAG 208 mean?", "a": "YEL means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on both sides. the size code 208 carries the usual bore arithmetic — 40 mm (code 08 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the AG suffix identifies the farm-duty variant of the range: sealed and flinger-protected for chaff and dust, with the catalogue deliberately derating its permissible speed versus the industrial execution." }, { "q": "What is the difference between YET and YEL?", "a": "YET has the inner ring extended on one side; YEL extends it on both sides. Both lock with the eccentric collar and share bore/OD geometry; the sealed -2F executions sit in the YEL listings." }, { "q": "Can eccentric-collar bearings run in both directions?", "a": "They are intended for one predominant running direction; true reversing drives can unwind the eccentric. For bidirectional or vibrating shafts choose grub-screw or SKF ConCentra (YSP) locking." } ], "cross_ref": [ { "equiv_sku": "YEL-208-2RF-VL065", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x42.8 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 208-2RF/VL065 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YEL-208-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x42.8 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 208-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YSPAG-208", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x42.8 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSPAG 208 is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YSP-208-SB-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x42.8 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSP 208 SB-2F is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YELAG-208", "YELAG 208" ], "locale_variants": {} }, { "sku": "YEL-208-2RF-VL065", "brand": "SKF", "manufacturer_designation": "YEL 208-2RF/VL065", "series": "YEL2-series", "type": "insert", "d_mm": 40, "D_mm": 80, "B_mm": 42.8, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 30.7, "static_load_kN": 19, "fatigue_load_limit_kN": 0.8, "limiting_speed_rpm": 2800, "max_rpm": 2800, "weight_g": 710, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YEL2 series order number YEL 208-2RF/VL065 is a SKF insert bearing (Y-bearing) for a 40 mm shaft: eccentric-locking-collar insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 80 mm. Inside sits a sealed ball insert with an eccentric collar on the extended ring: collar bite locks the shaft, the contact seals retain the life grease, and the spherical OD floats in the Y-housing. YEL means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on both sides. the size code 208 carries the usual bore arithmetic — 40 mm (code 08 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the VL065 treatment galvanizes the bore and both side faces of the inner ring — a targeted anti-rust option for shafts and housings in damp air, used here with the printed seal execution. Envelope 40x80x42.8 mm (1.575x3.15x1.685 in), outer ring 21 mm wide, C 30.7 kN, C0 19 kN, Pu 0.8 kN. Mounted width B1 56.3 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 2,800 r/min; mass 710 g. Width accounting: B1 56.3 mm covers the bearing WITH its eccentric locking collar against 42.8 mm for the bearing itself and 21 mm outer-ring width; housing axial space is drawn to B1, seal replacement space to B. Bore-to-OD planning: OD 80 over bore 40 is a 2x step, while bore/overall-width gives 0.935; the spherical seat in the matching Y-housing must be specified to the 80 mm OD, not to a cylindrical housing bore. Pitch-diameter arithmetic: dm = (40+80)/2 = 60 mm; at the 2,800 r/min limiting speed the ball set runs at dn approx 1.68x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Load balance for documentation: C0 19 kN against C 30.7 kN gives a 0.619 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 40x80 mm insert on its chamfer tilts the whole spherical seat. Sealed zinc-coated collar note: VL065 covers the inner-ring bore and side faces under the -2RF seal set; the galvanized bore is slightly larger after coating, so use shafts in the lower half of the SKF tolerance band to avoid a skrink-fit that prevents collar removal. Direction rule for YEL-208-2RF-VL065: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 40 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "one-direction conveyor drives", "tiller and cultivator rotors", "agricultural machinery PTO-driven shafts" ], "failure_modes": [ "eccentric collar mounted against rotation direction works loose and spins, fretting the shaft", "collar set screw not locked into its recess: the collar unwinds and the bearing walks off its seat", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "relubricated with incompatible grease that hardens the factory fill and drags the seals" ], "pitfalls": [ "The eccentric collar is handed to running direction; fit it wrong on the 40 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "Overall width 56.3 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "Catalogue ratings belong to YEL 208-2RF/VL065 as the ecc two vl065 execution; other order numbers of the YEL 208 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YEL-208-2RF-VL065?", "a": "Boundary dimensions: bore 40 mm, sphered OD 80 mm, overall width 42.8 mm (56.3 mm with the collar); weight 710 g. Loads: dynamic 30.7 kN, static 19 kN, fatigue 0.8 kN; the only published speed is the 2,800 r/min limiting value." }, { "q": "What does the designation YEL 208-2RF/VL065 mean?", "a": "YEL means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on both sides. the size code 208 carries the usual bore arithmetic — 40 mm (code 08 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the VL065 treatment galvanizes the bore and both side faces of the inner ring — a targeted anti-rust option for shafts and housings in damp air, used here with the printed seal execution." }, { "q": "How does the eccentric locking collar work?", "a": "The collar has an eccentric bore matching an eccentric on the inner ring extension. After sliding it on, turn it in the shaft's running direction until it grips, then tighten the collar's own set screw into its recess. Rotation then self-tightens rather than loosens the lock." }, { "q": "Why is the collar sometimes wider than the bearing (B1)?", "a": "The B1 dimension includes the eccentric collar's axial width, so the housing needs that extra space beside the bearing. Draw housings to B1, not B, when replacing a grub-screw unit with a collar unit." } ], "cross_ref": [ { "equiv_sku": "YELAG-208", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x42.8 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 208 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YEL-208-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x42.8 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 208-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YSPAG-208", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x42.8 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSPAG 208 is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YSP-208-SB-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x42.8 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSP 208 SB-2F is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YEL-208-2RF-VL065", "YEL 208-2RF/VL065" ], "locale_variants": {} }, { "sku": "YEL-208-2F", "brand": "SKF", "manufacturer_designation": "YEL 208-2F", "series": "YEL2-series", "type": "insert", "d_mm": 40, "D_mm": 80, "B_mm": 42.8, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 30.7, "static_load_kN": 19, "fatigue_load_limit_kN": 0.8, "limiting_speed_rpm": 4800, "max_rpm": 4800, "weight_g": 700, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YEL2 series order number YEL 208-2F is a SKF insert bearing (Y-bearing) for a 40 mm shaft: eccentric-locking-collar insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 80 mm. Inside sits a sealed ball insert with an eccentric collar on the extended ring: collar bite locks the shaft, the contact seals retain the life grease, and the spherical OD floats in the Y-housing. YEL means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on both sides. the size code 208 carries the usual bore arithmetic — 40 mm (code 08 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 40x80x42.8 mm (1.575x3.15x1.685 in), outer ring 21 mm wide, C 30.7 kN, C0 19 kN, Pu 0.8 kN. Mounted width B1 56.3 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 4,800 r/min; mass 700 g. Pitch-diameter arithmetic: dm = (40+80)/2 = 60 mm; at the 4,800 r/min limiting speed the ball set runs at dn approx 2.88x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Speed ceiling of 4,800 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 40x80 mm insert on its chamfer tilts the whole spherical seat. Bore-to-OD planning: OD 80 over bore 40 is a 2x step, while bore/overall-width gives 0.935; the spherical seat in the matching Y-housing must be specified to the 80 mm OD, not to a cylindrical housing bore. Fatigue-limit check: Pu 0.8 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YEL 208-2F — most belt-driven mounted-unit loads sit comfortably under 2.606 % of C. Two-side sealed collar note: after driving the eccentric collar tight, lock the collar set screw against its recess and verify the collar cannot be turned by hand; a collar that was merely pressed on without the eccentric bite spins on the shaft and frets it within hours. Direction rule for YEL-208-2F: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 40 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "tiller and cultivator rotors", "ventilation equipment with frequent bearing changes", "one-direction conveyor drives" ], "failure_modes": [ "collar set screw not locked into its recess: the collar unwinds and the bearing walks off its seat", "burr or paint under the eccentric faces prevents full bite, leaving an eccentric preload that runs hot", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "The eccentric collar is handed to running direction; fit it wrong on the 40 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Overall width 56.3 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "Ordering discipline for the 40 mm size: the chapter lists several executions side by side (YEL2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YEL-208-2F?", "a": "Boundary dimensions: bore 40 mm, sphered OD 80 mm, overall width 42.8 mm (56.3 mm with the collar); weight 700 g. Loads: dynamic 30.7 kN, static 19 kN, fatigue 0.8 kN; the only published speed is the 4,800 r/min limiting value." }, { "q": "What does the designation YEL 208-2F mean?", "a": "YEL means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on both sides. the size code 208 carries the usual bore arithmetic — 40 mm (code 08 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "Can eccentric-collar bearings run in both directions?", "a": "They are intended for one predominant running direction; true reversing drives can unwind the eccentric. For bidirectional or vibrating shafts choose grub-screw or SKF ConCentra (YSP) locking." }, { "q": "How does the eccentric locking collar work?", "a": "The collar has an eccentric bore matching an eccentric on the inner ring extension. After sliding it on, turn it in the shaft's running direction until it grips, then tighten the collar's own set screw into its recess. Rotation then self-tightens rather than loosens the lock." } ], "cross_ref": [ { "equiv_sku": "YELAG-208", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x42.8 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 208 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YEL-208-2RF-VL065", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x42.8 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 208-2RF/VL065 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YSPAG-208", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x42.8 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSPAG 208 is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YSP-208-SB-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x42.8 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSP 208 SB-2F is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YEL-208-2F", "YEL 208-2F" ], "locale_variants": {} }, { "sku": "YET-209", "brand": "SKF", "manufacturer_designation": "YET 209", "series": "YEL2-series", "type": "insert", "d_mm": 45, "D_mm": 85, "B_mm": 30.2, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 33.2, "static_load_kN": 21.6, "fatigue_load_limit_kN": 0.915, "limiting_speed_rpm": 4300, "max_rpm": 4300, "weight_g": 680, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YET 209 is a eccentric-locking-collar insert bearing with a one-side-extended inner ring, 45x85x30.2 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction pairs capped deep-groove geometry with a one-piece eccentric locking collar and a convex outer ring — quick to mount on plain commercial shafts and tolerant of initial static misalignment. reading YET: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended on one side. the size code 209 carries the usual bore arithmetic — 45 mm (code 09 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units. Envelope 45x85x30.2 mm (1.772x3.346x1.189 in), outer ring 22 mm wide, C 33.2 kN, C0 21.6 kN, Pu 0.915 kN. Mounted width B1 43.7 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 4,300 r/min; mass 680 g. Pitch-diameter arithmetic: dm = (45+85)/2 = 65 mm; at the 4,300 r/min limiting speed the ball set runs at dn approx 2.79x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Outer-vs-overall width: the outer ring is 22 mm wide inside the 30.2 mm total, so the extended inner ring accounts for 0.272 of the overall width (8.2 mm of axial projection on the locking side). Bore-to-OD planning: OD 85 over bore 45 is a 1.889x step, while bore/overall-width gives 1.49; the spherical seat in the matching Y-housing must be specified to the 85 mm OD, not to a cylindrical housing bore. Mass-to-load ratio for YET-209: 20.482 g of catalogue mass per rated kN of C, and 15.111 g per millimetre of bore — useful when comparing executions of the same 45x85 mm envelope on the drawing. Fatigue-limit check: Pu 0.915 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YET 209 — most belt-driven mounted-unit loads sit comfortably under 2.756 % of C. One-side collar note: the eccentric collar mounts on the extended side only and must turn in the shaft rotation direction to self-tighten; on reversing drives this design can loosen by design intent — choose grub-screw or ConCentra locking for true bidirectional shafts. Direction rule for YET-209: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 45 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "tiller and cultivator rotors", "ventilation equipment with frequent bearing changes", "one-direction conveyor drives" ], "failure_modes": [ "collar set screw not locked into its recess: the collar unwinds and the bearing walks off its seat", "burr or paint under the eccentric faces prevents full bite, leaving an eccentric preload that runs hot", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "Overall width 43.7 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YET collar.", "The eccentric collar is handed to running direction; fit it wrong on the 45 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "The 33.2/21.6 kN figures belong specifically to YET 209; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YET-209?", "a": "The catalogue envelope is 45x85x30.2 mm with a spherical outside surface; mass 680 g. Ratings C 33.2/21.6 kN, Pu 0.915 kN, limiting speed 4,300 r/min." }, { "q": "What does the designation YET 209 mean?", "a": "reading YET: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended on one side. the size code 209 carries the usual bore arithmetic — 45 mm (code 09 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units." }, { "q": "Can eccentric-collar bearings run in both directions?", "a": "They are intended for one predominant running direction; true reversing drives can unwind the eccentric. For bidirectional or vibrating shafts choose grub-screw or SKF ConCentra (YSP) locking." }, { "q": "How does the eccentric locking collar work?", "a": "The collar has an eccentric bore matching an eccentric on the inner ring extension. After sliding it on, turn it in the shaft's running direction until it grips, then tighten the collar's own set screw into its recess. Rotation then self-tightens rather than loosens the lock." } ], "cross_ref": [ { "equiv_sku": "YET", "equiv_brand": "ISO 15", "level": "full", "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YET-209", "YET 209" ], "locale_variants": {} }, { "sku": "YELAG-209", "brand": "SKF", "manufacturer_designation": "YELAG 209", "series": "YEL2-series", "type": "insert", "d_mm": 45, "D_mm": 85, "B_mm": 42.8, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 33.2, "static_load_kN": 21.6, "fatigue_load_limit_kN": 0.915, "limiting_speed_rpm": 850, "max_rpm": 850, "weight_g": 780, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YEL2 series order number YELAG 209 is a SKF insert bearing (Y-bearing) for a 45 mm shaft: eccentric-locking-collar insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 85 mm. Inside sits a sealed ball insert with an eccentric collar on the extended ring: collar bite locks the shaft, the contact seals retain the life grease, and the spherical OD floats in the Y-housing. YEL means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on both sides. the size code 209 carries the usual bore arithmetic — 45 mm (code 09 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the AG suffix identifies the farm-duty variant of the range: sealed and flinger-protected for chaff and dust, with the catalogue deliberately derating its permissible speed versus the industrial execution. Envelope 45x85x42.8 mm (1.772x3.346x1.685 in), outer ring 22 mm wide, C 33.2 kN, C0 21.6 kN, Pu 0.915 kN. Mounted width B1 56.3 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 850 r/min; mass 780 g. Load balance for documentation: C0 21.6 kN against C 33.2 kN gives a 0.651 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Rating split for the maintenance file: dynamic 33.2 kN (L10), static 21.6 kN (s0 shock check), fatigue 0.915 kN (adjusted life) — three separate uses for YELAG 209, none interchangeable with another. Bore-to-OD planning: OD 85 over bore 45 is a 1.889x step, while bore/overall-width gives 1.051; the spherical seat in the matching Y-housing must be specified to the 85 mm OD, not to a cylindrical housing bore. Envelope arithmetic: the radial section from 45 mm bore to 85 mm OD is 20 mm; dividing C 33.2 kN by that section gives 1.66 kN per section millimetre, and the 42.8 mm overall width is 2.14x the section. Speed ceiling of 850 r/min is the catalogue mechanical limit for THIS execution; the AG agricultural derate is deliberate, so real fan duty is planned well below it. Direction rule for YELAG-209: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 45 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "agricultural machinery PTO-driven shafts", "one-direction conveyor drives", "ventilation equipment with frequent bearing changes" ], "failure_modes": [ "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "eccentric collar mounted against rotation direction works loose and spins, fretting the shaft", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "Overall width 56.3 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "The eccentric collar is handed to running direction; fit it wrong on the 45 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "The 33.2/21.6 kN figures belong specifically to YELAG 209; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YELAG-209?", "a": "Boundary dimensions: bore 45 mm, sphered OD 85 mm, overall width 42.8 mm (56.3 mm with the collar); weight 780 g. Loads: dynamic 33.2 kN, static 21.6 kN, fatigue 0.915 kN; the only published speed is the 850 r/min limiting value." }, { "q": "What does the designation YELAG 209 mean?", "a": "YEL means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on both sides. the size code 209 carries the usual bore arithmetic — 45 mm (code 09 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the AG suffix identifies the farm-duty variant of the range: sealed and flinger-protected for chaff and dust, with the catalogue deliberately derating its permissible speed versus the industrial execution." }, { "q": "Why is the collar sometimes wider than the bearing (B1)?", "a": "The B1 dimension includes the eccentric collar's axial width, so the housing needs that extra space beside the bearing. Draw housings to B1, not B, when replacing a grub-screw unit with a collar unit." }, { "q": "What is the difference between YET and YEL?", "a": "YET has the inner ring extended on one side; YEL extends it on both sides. Both lock with the eccentric collar and share bore/OD geometry; the sealed -2F executions sit in the YEL listings." } ], "cross_ref": [ { "equiv_sku": "YEL-209-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 45x85x42.8 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 209-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YELAG-209", "YELAG 209" ], "locale_variants": {} }, { "sku": "YEL-209-2F", "brand": "SKF", "manufacturer_designation": "YEL 209-2F", "series": "YEL2-series", "type": "insert", "d_mm": 45, "D_mm": 85, "B_mm": 42.8, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 33.2, "static_load_kN": 21.6, "fatigue_load_limit_kN": 0.915, "limiting_speed_rpm": 4300, "max_rpm": 4300, "weight_g": 790, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YEL 209-2F is SKF's 45 mm-bore eccentric-locking-collar insert bearing with the inner ring extended on both sides in the YEL2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 45x85x42.8 mm. The deep-groove ball set is built into an extended inner ring carrying a separate eccentric locking collar; turning the collar against its eccentric seat pinches the shaft, and the sphered outer ring self-aligns in the housing. the YEL prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended both sides. the size code 209 carries the usual bore arithmetic — 45 mm (code 09 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 45x85x42.8 mm (1.772x3.346x1.685 in), outer ring 22 mm wide, C 33.2 kN, C0 21.6 kN, Pu 0.915 kN. Mounted width B1 56.3 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 4,300 r/min; mass 790 g. At the printed limiting speed of 4,300 r/min the mean diameter dm = 65 mm implies dn about 2.79x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Bore-to-OD planning: OD 85 over bore 45 is a 1.889x step, while bore/overall-width gives 1.051; the spherical seat in the matching Y-housing must be specified to the 85 mm OD, not to a cylindrical housing bore. The s1 34.9 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Static-first planning: the 0.505 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 45 mm shaft, not the 33.2 kN L10 value. Envelope arithmetic: the radial section from 45 mm bore to 85 mm OD is 20 mm; dividing C 33.2 kN by that section gives 1.66 kN per section millimetre, and the 42.8 mm overall width is 2.14x the section. Two-side sealed collar note: after driving the eccentric collar tight, lock the collar set screw against its recess and verify the collar cannot be turned by hand; a collar that was merely pressed on without the eccentric bite spins on the shaft and frets it within hours. Direction rule for YEL-209-2F: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 45 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "ventilation equipment with frequent bearing changes", "tiller and cultivator rotors", "one-direction conveyor drives" ], "failure_modes": [ "burr or paint under the eccentric faces prevents full bite, leaving an eccentric preload that runs hot", "collar set screw not locked into its recess: the collar unwinds and the bearing walks off its seat", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "Overall width 56.3 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "The eccentric collar is handed to running direction; fit it wrong on the 45 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Ordering discipline for the 45 mm size: the chapter lists several executions side by side (YEL2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YEL-209-2F?", "a": "YEL 209-2F measures 45 mm bore x 85 mm OD x 42.8 mm overall width (outer ring 22 mm wide), 1.772 x 3.346 x 1.685 in; mass about 790 g. SKF 17000 ratings: C 33.2 kN, C0 21.6 kN, Pu 0.915 kN, limiting speed 4,300 r/min." }, { "q": "What does the designation YEL 209-2F mean?", "a": "the YEL prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended both sides. the size code 209 carries the usual bore arithmetic — 45 mm (code 09 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "How does the eccentric locking collar work?", "a": "The collar has an eccentric bore matching an eccentric on the inner ring extension. After sliding it on, turn it in the shaft's running direction until it grips, then tighten the collar's own set screw into its recess. Rotation then self-tightens rather than loosens the lock." }, { "q": "Why is the collar sometimes wider than the bearing (B1)?", "a": "The B1 dimension includes the eccentric collar's axial width, so the housing needs that extra space beside the bearing. Draw housings to B1, not B, when replacing a grub-screw unit with a collar unit." } ], "cross_ref": [ { "equiv_sku": "YELAG-209", "equiv_brand": "SKF", "level": "full", "note": "Same 45x85x42.8 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 209 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YEL-209-2F", "YEL 209-2F" ], "locale_variants": {} }, { "sku": "YET-210", "brand": "SKF", "manufacturer_designation": "YET 210", "series": "YEL2-series", "type": "insert", "d_mm": 50, "D_mm": 90, "B_mm": 30.2, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 35.1, "static_load_kN": 23.2, "fatigue_load_limit_kN": 0.98, "limiting_speed_rpm": 4000, "max_rpm": 4000, "weight_g": 740, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YET 210 is a eccentric-locking-collar insert bearing with a one-side-extended inner ring, 50x90x30.2 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction pairs capped deep-groove geometry with a one-piece eccentric locking collar and a convex outer ring — quick to mount on plain commercial shafts and tolerant of initial static misalignment. reading YET: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended on one side. the size code 210 carries the usual bore arithmetic — 50 mm (code 10 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units. Envelope 50x90x30.2 mm (1.969x3.543x1.189 in), outer ring 22 mm wide, C 35.1 kN, C0 23.2 kN, Pu 0.98 kN. Mounted width B1 43.7 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 4,000 r/min; mass 740 g. Speed ceiling of 4,000 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 62.5 mm, d2 67.2 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the inner flinger. Width accounting: B1 43.7 mm covers the bearing WITH its eccentric locking collar against 30.2 mm for the bearing itself and 22 mm outer-ring width; housing axial space is drawn to B1, seal replacement space to B. The s1 32.7 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Grease-life arithmetic is dominated by speed: at dn approx 2.80x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. One-side collar note: the eccentric collar mounts on the extended side only and must turn in the shaft rotation direction to self-tighten; on reversing drives this design can loosen by design intent — choose grub-screw or ConCentra locking for true bidirectional shafts. Collar geometry for this size: over the 22 mm outer-ring width the inner ring runs to 30.2 mm overall (43.7 mm including the eccentric collar width), giving the collar its eccentric seating face clear of the seal.", "applications": [ "one-direction conveyor drives", "agricultural machinery PTO-driven shafts", "ventilation equipment with frequent bearing changes" ], "failure_modes": [ "eccentric collar mounted against rotation direction works loose and spins, fretting the shaft", "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "Overall width 43.7 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YET collar.", "The eccentric collar is handed to running direction; fit it wrong on the 50 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "The 35.1/23.2 kN figures belong specifically to YET 210; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YET-210?", "a": "The catalogue envelope is 50x90x30.2 mm with a spherical outside surface; mass 740 g. Ratings C 35.1/23.2 kN, Pu 0.98 kN, limiting speed 4,000 r/min." }, { "q": "What does the designation YET 210 mean?", "a": "reading YET: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended on one side. the size code 210 carries the usual bore arithmetic — 50 mm (code 10 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units." }, { "q": "Why is the collar sometimes wider than the bearing (B1)?", "a": "The B1 dimension includes the eccentric collar's axial width, so the housing needs that extra space beside the bearing. Draw housings to B1, not B, when replacing a grub-screw unit with a collar unit." }, { "q": "What is the difference between YET and YEL?", "a": "YET has the inner ring extended on one side; YEL extends it on both sides. Both lock with the eccentric collar and share bore/OD geometry; the sealed -2F executions sit in the YEL listings." } ], "cross_ref": [ { "equiv_sku": "YET", "equiv_brand": "ISO 15", "level": "full", "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YET-210", "YET 210" ], "locale_variants": {} }, { "sku": "YELAG-210", "brand": "SKF", "manufacturer_designation": "YELAG 210", "series": "YEL2-series", "type": "insert", "d_mm": 50, "D_mm": 90, "B_mm": 49.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 35.1, "static_load_kN": 23.2, "fatigue_load_limit_kN": 0.98, "limiting_speed_rpm": 800, "max_rpm": 800, "weight_g": 900, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YELAG 210 is SKF's 50 mm-bore eccentric-locking-collar insert bearing with the inner ring extended on both sides in the YEL2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 50x90x49.2 mm. The deep-groove ball set is built into an extended inner ring carrying a separate eccentric locking collar; turning the collar against its eccentric seat pinches the shaft, and the sphered outer ring self-aligns in the housing. the YEL prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended both sides. the size code 210 carries the usual bore arithmetic — 50 mm (code 10 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. AG marks the agricultural-machinery application execution, built on the sealed both-sides-extended geometry and tuned for the low-speed, shock-laden duty of harvesters, balers and spreaders — note the catalogue prints a much reduced limiting speed for this variant. Envelope 50x90x49.2 mm (1.969x3.543x1.937 in), outer ring 22 mm wide, C 35.1 kN, C0 23.2 kN, Pu 0.98 kN. Mounted width B1 62.7 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 800 r/min; mass 900 g. At the printed limiting speed of 800 r/min the mean diameter dm = 70 mm implies dn about 0.56x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Speed ceiling of 800 r/min is the catalogue mechanical limit for THIS execution; the AG agricultural derate is deliberate, so real fan duty is planned well below it. Selection figures for YELAG 210: C0/C is 0.661, Pu 0.98 kN is 2.792 % of the 35.1 kN dynamic rating, and the 900 g catalogue mass works out to roughly 18 g per millimetre of the 50 mm bore. Spherical-seat note in numbers: the 90 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 70 = 219.911 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Outer-vs-overall width: the outer ring is 22 mm wide inside the 49.2 mm total, so the extended inner ring accounts for 0.553 of the overall width (13.6 mm of axial projection per side). Collar geometry for this size: over the 22 mm outer-ring width the inner ring runs to 49.2 mm overall (62.7 mm including the eccentric collar width), giving the collar its eccentric seating face clear of the seal.", "applications": [ "ventilation equipment with frequent bearing changes", "tiller and cultivator rotors", "one-direction conveyor drives" ], "failure_modes": [ "burr or paint under the eccentric faces prevents full bite, leaving an eccentric preload that runs hot", "collar set screw not locked into its recess: the collar unwinds and the bearing walks off its seat", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "Overall width 62.7 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "The eccentric collar is handed to running direction; fit it wrong on the 50 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "The 35.1/23.2 kN figures belong specifically to YELAG 210; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YELAG-210?", "a": "YELAG 210 measures 50 mm bore x 90 mm OD x 49.2 mm overall width (outer ring 22 mm wide), 1.969 x 3.543 x 1.937 in; mass about 900 g. SKF 17000 ratings: C 35.1 kN, C0 23.2 kN, Pu 0.98 kN, limiting speed 800 r/min." }, { "q": "What does the designation YELAG 210 mean?", "a": "the YEL prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended both sides. the size code 210 carries the usual bore arithmetic — 50 mm (code 10 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. AG marks the agricultural-machinery application execution, built on the sealed both-sides-extended geometry and tuned for the low-speed, shock-laden duty of harvesters, balers and spreaders — note the catalogue prints a much reduced limiting speed for this variant." }, { "q": "Can eccentric-collar bearings run in both directions?", "a": "They are intended for one predominant running direction; true reversing drives can unwind the eccentric. For bidirectional or vibrating shafts choose grub-screw or SKF ConCentra (YSP) locking." }, { "q": "How does the eccentric locking collar work?", "a": "The collar has an eccentric bore matching an eccentric on the inner ring extension. After sliding it on, turn it in the shaft's running direction until it grips, then tighten the collar's own set screw into its recess. Rotation then self-tightens rather than loosens the lock." } ], "cross_ref": [ { "equiv_sku": "YEL-210-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 50x90x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 210-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YELAG-210", "YELAG 210" ], "locale_variants": {} }, { "sku": "YEL-210-2F", "brand": "SKF", "manufacturer_designation": "YEL 210-2F", "series": "YEL2-series", "type": "insert", "d_mm": 50, "D_mm": 90, "B_mm": 49.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 35.1, "static_load_kN": 23.2, "fatigue_load_limit_kN": 0.98, "limiting_speed_rpm": 4000, "max_rpm": 4000, "weight_g": 920, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YEL 210-2F is a eccentric-locking-collar insert bearing with the inner ring extended on both sides, 50x90x49.2 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction pairs capped deep-groove geometry with a one-piece eccentric locking collar and a convex outer ring — quick to mount on plain commercial shafts and tolerant of initial static misalignment. reading YEL: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended symmetrically both sides. the size code 210 carries the usual bore arithmetic — 50 mm (code 10 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution. Envelope 50x90x49.2 mm (1.969x3.543x1.937 in), outer ring 22 mm wide, C 35.1 kN, C0 23.2 kN, Pu 0.98 kN. Mounted width B1 62.7 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 4,000 r/min; mass 920 g. Rating split for the maintenance file: dynamic 35.1 kN (L10), static 23.2 kN (s0 shock check), fatigue 0.98 kN (adjusted life) — three separate uses for YEL 210-2F, none interchangeable with another. Static-first planning: the 0.472 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 50 mm shaft, not the 35.1 kN L10 value. Envelope arithmetic: the radial section from 50 mm bore to 90 mm OD is 20 mm; dividing C 35.1 kN by that section gives 1.755 kN per section millimetre, and the 49.2 mm overall width is 2.46x the section. Load balance for documentation: C0 23.2 kN against C 35.1 kN gives a 0.661 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 50x90 mm insert on its chamfer tilts the whole spherical seat. Two-side sealed collar note: after driving the eccentric collar tight, lock the collar set screw against its recess and verify the collar cannot be turned by hand; a collar that was merely pressed on without the eccentric bite spins on the shaft and frets it within hours. Direction rule for YEL-210-2F: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 50 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "ventilation equipment with frequent bearing changes", "agricultural machinery PTO-driven shafts", "tiller and cultivator rotors" ], "failure_modes": [ "burr or paint under the eccentric faces prevents full bite, leaving an eccentric preload that runs hot", "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "Overall width 62.7 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "The eccentric collar is handed to running direction; fit it wrong on the 50 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "The 35.1/23.2 kN figures belong specifically to YEL 210-2F; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YEL-210-2F?", "a": "The catalogue envelope is 50x90x49.2 mm with a spherical outside surface; mass 920 g. Ratings C 35.1/23.2 kN, Pu 0.98 kN, limiting speed 4,000 r/min." }, { "q": "What does the designation YEL 210-2F mean?", "a": "reading YEL: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended symmetrically both sides. the size code 210 carries the usual bore arithmetic — 50 mm (code 10 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution." }, { "q": "What is the difference between YET and YEL?", "a": "YET has the inner ring extended on one side; YEL extends it on both sides. Both lock with the eccentric collar and share bore/OD geometry; the sealed -2F executions sit in the YEL listings." }, { "q": "Can eccentric-collar bearings run in both directions?", "a": "They are intended for one predominant running direction; true reversing drives can unwind the eccentric. For bidirectional or vibrating shafts choose grub-screw or SKF ConCentra (YSP) locking." } ], "cross_ref": [ { "equiv_sku": "YELAG-210", "equiv_brand": "SKF", "level": "full", "note": "Same 50x90x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 210 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YEL-210-2F", "YEL 210-2F" ], "locale_variants": {} }, { "sku": "YET-211", "brand": "SKF", "manufacturer_designation": "YET 211", "series": "YEL2-series", "type": "insert", "d_mm": 55, "D_mm": 100, "B_mm": 32.6, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 43.6, "static_load_kN": 29, "fatigue_load_limit_kN": 1.25, "limiting_speed_rpm": 3600, "max_rpm": 3600, "weight_g": 1050, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YET 211 is a eccentric-locking-collar insert bearing with a one-side-extended inner ring, 55x100x32.6 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction pairs capped deep-groove geometry with a one-piece eccentric locking collar and a convex outer ring — quick to mount on plain commercial shafts and tolerant of initial static misalignment. reading YET: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended on one side. the size code 211 carries the usual bore arithmetic — 55 mm (code 11 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units. Envelope 55x100x32.6 mm (2.165x3.937x1.283 in), outer ring 25 mm wide, C 43.6 kN, C0 29 kN, Pu 1.25 kN. Mounted width B1 48.4 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 3,600 r/min; mass 1050 g. Capacity density: 43.6 kN from 1.050 kg of bearing steel is about 41.524 kN per kilogram, and per width millimetre the 32.6 mm unit carries 1.337 kN of dynamic capacity. Spherical-seat note in numbers: the 100 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 77.5 = 243.473 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Load balance for documentation: C0 29 kN against C 43.6 kN gives a 0.665 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Static-first planning: the 0.89 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 55 mm shaft, not the 43.6 kN L10 value. Grease-life arithmetic is dominated by speed: at dn approx 2.79x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. One-side collar note: the eccentric collar mounts on the extended side only and must turn in the shaft rotation direction to self-tighten; on reversing drives this design can loosen by design intent — choose grub-screw or ConCentra locking for true bidirectional shafts. Direction rule for YET-211: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 55 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "one-direction conveyor drives", "agricultural machinery PTO-driven shafts", "ventilation equipment with frequent bearing changes" ], "failure_modes": [ "eccentric collar mounted against rotation direction works loose and spins, fretting the shaft", "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "The eccentric collar is handed to running direction; fit it wrong on the 55 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Overall width 48.4 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YET collar.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "Catalogue ratings belong to YET 211 as the ecc one open execution; other order numbers of the YET 211 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YET-211?", "a": "The catalogue envelope is 55x100x32.6 mm with a spherical outside surface; mass 1050 g. Ratings C 43.6/29 kN, Pu 1.25 kN, limiting speed 3,600 r/min." }, { "q": "What does the designation YET 211 mean?", "a": "reading YET: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended on one side. the size code 211 carries the usual bore arithmetic — 55 mm (code 11 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units." }, { "q": "What is the difference between YET and YEL?", "a": "YET has the inner ring extended on one side; YEL extends it on both sides. Both lock with the eccentric collar and share bore/OD geometry; the sealed -2F executions sit in the YEL listings." }, { "q": "Can eccentric-collar bearings run in both directions?", "a": "They are intended for one predominant running direction; true reversing drives can unwind the eccentric. For bidirectional or vibrating shafts choose grub-screw or SKF ConCentra (YSP) locking." } ], "cross_ref": [ { "equiv_sku": "YET", "equiv_brand": "ISO 15", "level": "full", "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YET-211", "YET 211" ], "locale_variants": {} }, { "sku": "YEL-211-2F", "brand": "SKF", "manufacturer_designation": "YEL 211-2F", "series": "YEL2-series", "type": "insert", "d_mm": 55, "D_mm": 100, "B_mm": 55.6, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 43.6, "static_load_kN": 29, "fatigue_load_limit_kN": 1.25, "limiting_speed_rpm": 3600, "max_rpm": 3600, "weight_g": 1300, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YEL 211-2F is a eccentric-locking-collar insert bearing with the inner ring extended on both sides, 55x100x55.6 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction pairs capped deep-groove geometry with a one-piece eccentric locking collar and a convex outer ring — quick to mount on plain commercial shafts and tolerant of initial static misalignment. reading YEL: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended symmetrically both sides. the size code 211 carries the usual bore arithmetic — 55 mm (code 11 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution. Envelope 55x100x55.6 mm (2.165x3.937x2.189 in), outer ring 25 mm wide, C 43.6 kN, C0 29 kN, Pu 1.25 kN. Mounted width B1 71.4 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 3,600 r/min; mass 1300 g. Selection figures for YEL 211-2F: C0/C is 0.665, Pu 1.25 kN is 2.867 % of the 43.6 kN dynamic rating, and the 1300 g catalogue mass works out to roughly 23.636 g per millimetre of the 55 mm bore. Fatigue-limit check: Pu 1.25 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YEL 211-2F — most belt-driven mounted-unit loads sit comfortably under 2.867 % of C. The s1 43.6 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Rating split for the maintenance file: dynamic 43.6 kN (L10), static 29 kN (s0 shock check), fatigue 1.25 kN (adjusted life) — three separate uses for YEL 211-2F, none interchangeable with another. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 55x100 mm insert on its chamfer tilts the whole spherical seat. Two-side sealed collar note: after driving the eccentric collar tight, lock the collar set screw against its recess and verify the collar cannot be turned by hand; a collar that was merely pressed on without the eccentric bite spins on the shaft and frets it within hours. Collar geometry for this size: over the 25 mm outer-ring width the inner ring runs to 55.6 mm overall (71.4 mm including the eccentric collar width), giving the collar its eccentric seating face clear of the seal.", "applications": [ "one-direction conveyor drives", "agricultural machinery PTO-driven shafts", "ventilation equipment with frequent bearing changes" ], "failure_modes": [ "eccentric collar mounted against rotation direction works loose and spins, fretting the shaft", "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "Overall width 71.4 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "The eccentric collar is handed to running direction; fit it wrong on the 55 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "The 43.6/29 kN figures belong specifically to YEL 211-2F; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YEL-211-2F?", "a": "The catalogue envelope is 55x100x55.6 mm with a spherical outside surface; mass 1300 g. Ratings C 43.6/29 kN, Pu 1.25 kN, limiting speed 3,600 r/min." }, { "q": "What does the designation YEL 211-2F mean?", "a": "reading YEL: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended symmetrically both sides. the size code 211 carries the usual bore arithmetic — 55 mm (code 11 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution." }, { "q": "Why is the collar sometimes wider than the bearing (B1)?", "a": "The B1 dimension includes the eccentric collar's axial width, so the housing needs that extra space beside the bearing. Draw housings to B1, not B, when replacing a grub-screw unit with a collar unit." }, { "q": "What is the difference between YET and YEL?", "a": "YET has the inner ring extended on one side; YEL extends it on both sides. Both lock with the eccentric collar and share bore/OD geometry; the sealed -2F executions sit in the YEL listings." } ], "cross_ref": [ { "equiv_sku": "YAR-211-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 55x100x55.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 211-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-211-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 55x100x55.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 211-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YEL-211-2F", "YEL 211-2F" ], "locale_variants": {} }, { "sku": "YET-212", "brand": "SKF", "manufacturer_designation": "YET 212", "series": "YEL2-series", "type": "insert", "d_mm": 60, "D_mm": 110, "B_mm": 36.7, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 52.7, "static_load_kN": 36, "fatigue_load_limit_kN": 1.53, "limiting_speed_rpm": 3400, "max_rpm": 3400, "weight_g": 1350, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YEL2 series order number YET 212 is a SKF insert bearing (Y-bearing) for a 60 mm shaft: eccentric-locking-collar insert bearing with a one-side-extended inner ring, built to the ISO 15 diameter-series envelope with a sphered OD of 110 mm. Inside sits a sealed ball insert with an eccentric collar on the extended ring: collar bite locks the shaft, the contact seals retain the life grease, and the spherical OD floats in the Y-housing. YET means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on one side. the size code 212 carries the usual bore arithmetic — 60 mm (code 12 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. with no -2F/-2RF suffix the order number denotes the open external execution of the YEL2 size — add external exclusion at the housing and plan relubrication intervals for dusty or wet surroundings. Envelope 60x110x36.7 mm (2.362x4.331x1.445 in), outer ring 26 mm wide, C 52.7 kN, C0 36 kN, Pu 1.53 kN. Mounted width B1 52.6 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 3,400 r/min; mass 1350 g. Load balance for documentation: C0 36 kN against C 52.7 kN gives a 0.683 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Selection figures for YET 212: C0/C is 0.683, Pu 1.53 kN is 2.903 % of the 52.7 kN dynamic rating, and the 1350 g catalogue mass works out to roughly 22.5 g per millimetre of the 60 mm bore. Bore-to-OD planning: OD 110 over bore 60 is a 1.833x step, while bore/overall-width gives 1.635; the spherical seat in the matching Y-housing must be specified to the 110 mm OD, not to a cylindrical housing bore. Fatigue-limit check: Pu 1.53 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YET 212 — most belt-driven mounted-unit loads sit comfortably under 2.903 % of C. Mass-to-load ratio for YET-212: 25.617 g of catalogue mass per rated kN of C, and 22.5 g per millimetre of bore — useful when comparing executions of the same 60x110 mm envelope on the drawing. One-side collar note: the eccentric collar mounts on the extended side only and must turn in the shaft rotation direction to self-tighten; on reversing drives this design can loosen by design intent — choose grub-screw or ConCentra locking for true bidirectional shafts. Direction rule for YET-212: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 60 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "heavy agricultural and harvesting equipment", "one-direction bulk conveyor shafts", "forestry and chipper drives" ], "failure_modes": [ "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "burr or paint under the eccentric faces prevents full bite, leaving an eccentric preload that runs hot", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "The eccentric collar is handed to running direction; fit it wrong on the 60 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Overall width 52.6 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YET collar.", "Ordering discipline for the 60 mm size: the chapter lists several executions side by side (YEL2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YET-212?", "a": "Boundary dimensions: bore 60 mm, sphered OD 110 mm, overall width 36.7 mm (52.6 mm with the collar); weight 1350 g. Loads: dynamic 52.7 kN, static 36 kN, fatigue 1.53 kN; the only published speed is the 3,400 r/min limiting value." }, { "q": "What does the designation YET 212 mean?", "a": "YET means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on one side. the size code 212 carries the usual bore arithmetic — 60 mm (code 12 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. with no -2F/-2RF suffix the order number denotes the open external execution of the YEL2 size — add external exclusion at the housing and plan relubrication intervals for dusty or wet surroundings." }, { "q": "Can eccentric-collar bearings run in both directions?", "a": "They are intended for one predominant running direction; true reversing drives can unwind the eccentric. For bidirectional or vibrating shafts choose grub-screw or SKF ConCentra (YSP) locking." }, { "q": "How does the eccentric locking collar work?", "a": "The collar has an eccentric bore matching an eccentric on the inner ring extension. After sliding it on, turn it in the shaft's running direction until it grips, then tighten the collar's own set screw into its recess. Rotation then self-tightens rather than loosens the lock." } ], "cross_ref": [ { "equiv_sku": "YET", "equiv_brand": "ISO 15", "level": "full", "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YET-212", "YET 212" ], "locale_variants": {} }, { "sku": "YEL-212-2F", "brand": "SKF", "manufacturer_designation": "YEL 212-2F", "series": "YEL2-series", "type": "insert", "d_mm": 60, "D_mm": 110, "B_mm": 61.9, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 52.7, "static_load_kN": 36, "fatigue_load_limit_kN": 1.53, "limiting_speed_rpm": 3400, "max_rpm": 3400, "weight_g": 1700, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YEL 212-2F is SKF's 60 mm-bore eccentric-locking-collar insert bearing with the inner ring extended on both sides in the YEL2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 60x110x61.9 mm. The deep-groove ball set is built into an extended inner ring carrying a separate eccentric locking collar; turning the collar against its eccentric seat pinches the shaft, and the sphered outer ring self-aligns in the housing. the YEL prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended both sides. the size code 212 carries the usual bore arithmetic — 60 mm (code 12 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 60x110x61.9 mm (2.362x4.331x2.437 in), outer ring 26 mm wide, C 52.7 kN, C0 36 kN, Pu 1.53 kN. Mounted width B1 77.8 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 3,400 r/min; mass 1700 g. Fatigue-limit check: Pu 1.53 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YEL 212-2F — most belt-driven mounted-unit loads sit comfortably under 2.903 % of C. Bore-to-OD planning: OD 110 over bore 60 is a 1.833x step, while bore/overall-width gives 0.969; the spherical seat in the matching Y-housing must be specified to the 110 mm OD, not to a cylindrical housing bore. The s1 46.8 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Static-first planning: the 0.582 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 60 mm shaft, not the 52.7 kN L10 value. Speed ceiling of 3,400 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Two-side sealed collar note: after driving the eccentric collar tight, lock the collar set screw against its recess and verify the collar cannot be turned by hand; a collar that was merely pressed on without the eccentric bite spins on the shaft and frets it within hours. Direction rule for YEL-212-2F: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 60 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "heavy agricultural and harvesting equipment", "one-direction bulk conveyor shafts", "forestry and chipper drives" ], "failure_modes": [ "burr or paint under the eccentric faces prevents full bite, leaving an eccentric preload that runs hot", "collar set screw not locked into its recess: the collar unwinds and the bearing walks off its seat", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "The eccentric collar is handed to running direction; fit it wrong on the 60 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "Overall width 77.8 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "Catalogue ratings belong to YEL 212-2F as the ecc two f execution; other order numbers of the YEL 212 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YEL-212-2F?", "a": "YEL 212-2F measures 60 mm bore x 110 mm OD x 61.9 mm overall width (outer ring 26 mm wide), 2.362 x 4.331 x 2.437 in; mass about 1700 g. SKF 17000 ratings: C 52.7 kN, C0 36 kN, Pu 1.53 kN, limiting speed 3,400 r/min." }, { "q": "What does the designation YEL 212-2F mean?", "a": "the YEL prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended both sides. the size code 212 carries the usual bore arithmetic — 60 mm (code 12 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "How does the eccentric locking collar work?", "a": "The collar has an eccentric bore matching an eccentric on the inner ring extension. After sliding it on, turn it in the shaft's running direction until it grips, then tighten the collar's own set screw into its recess. Rotation then self-tightens rather than loosens the lock." }, { "q": "Why is the collar sometimes wider than the bearing (B1)?", "a": "The B1 dimension includes the eccentric collar's axial width, so the housing needs that extra space beside the bearing. Draw housings to B1, not B, when replacing a grub-screw unit with a collar unit." } ], "cross_ref": [ { "equiv_sku": "YEL", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YEL-212-2F", "YEL 212-2F" ], "locale_variants": {} }, { "sku": "YET-203-008", "brand": "SKF", "manufacturer_designation": "YET 203-008", "series": "YEL2-series", "type": "insert", "d_mm": 12.7, "D_mm": 40, "B_mm": 19.1, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 9.56, "static_load_kN": 4.75, "fatigue_load_limit_kN": 0.2, "limiting_speed_rpm": 9500, "max_rpm": 9500, "weight_g": 130, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YEL2 series order number YET 203-008 is a SKF insert bearing (Y-bearing) for a 12.7 mm (0.5 in) shaft: eccentric-locking-collar insert bearing with a one-side-extended inner ring, built to the ISO 15 diameter-series envelope with a sphered OD of 40 mm. Inside sits a sealed ball insert with an eccentric collar on the extended ring: collar bite locks the shaft, the contact seals retain the life grease, and the spherical OD floats in the Y-housing. YET means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on one side. inch bore code -008 decodes as 0\" +8/16, i.e. 12.7 mm; the metric coded size YET 203 shares the same envelope but its bore is the metric value, not this one. with no -2F/-2RF suffix the order number denotes the open external execution of the YEL2 size — add external exclusion at the housing and plan relubrication intervals for dusty or wet surroundings. Envelope 12.7x40x19.1 mm (0.5x1.575x0.752 in), outer ring 12 mm wide, C 9.56 kN, C0 4.75 kN, Pu 0.2 kN. Mounted width B1 28.6 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 9,500 r/min; mass 130 g. Mass-to-load ratio for YET-203-008: 13.598 g of catalogue mass per rated kN of C, and 10.236 g per millimetre of bore — useful when comparing executions of the same 12.7x40 mm envelope on the drawing. Width accounting: B1 28.6 mm covers the bearing WITH its eccentric locking collar against 19.1 mm for the bearing itself and 12 mm outer-ring width; housing axial space is drawn to B1, seal replacement space to B. Envelope arithmetic: the radial section from 12.7 mm bore to 40 mm OD is 13.65 mm; dividing C 9.56 kN by that section gives 0.7 kN per section millimetre, and the 19.1 mm overall width is 1.399x the section. Load balance for documentation: C0 4.75 kN against C 9.56 kN gives a 0.497 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Rating split for the maintenance file: dynamic 9.56 kN (L10), static 4.75 kN (s0 shock check), fatigue 0.2 kN (adjusted life) — three separate uses for YET 203-008, none interchangeable with another. One-side collar note: the eccentric collar mounts on the extended side only and must turn in the shaft rotation direction to self-tighten; on reversing drives this design can loosen by design intent — choose grub-screw or ConCentra locking for true bidirectional shafts. Collar geometry for this size: over the 12 mm outer-ring width the inner ring runs to 19.1 mm overall (28.6 mm including the eccentric collar width), giving the collar its eccentric seating face clear of the seal.", "applications": [ "light drive rollers with plain commercial shafts", "small garden machinery and rotavators", "lawn and turf equipment" ], "failure_modes": [ "collar set screw not locked into its recess: the collar unwinds and the bearing walks off its seat", "eccentric collar mounted against rotation direction works loose and spins, fretting the shaft", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "The eccentric collar is handed to running direction; fit it wrong on the 12.7 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "Overall width 28.6 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YET collar.", "Catalogue ratings belong to YET 203-008 as the ecc one open execution; other order numbers of the YET 203-008 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YET-203-008?", "a": "Boundary dimensions: bore 12.7 mm, sphered OD 40 mm, overall width 19.1 mm (28.6 mm with the collar); weight 130 g. Loads: dynamic 9.56 kN, static 4.75 kN, fatigue 0.2 kN; the only published speed is the 9,500 r/min limiting value." }, { "q": "What does the designation YET 203-008 mean?", "a": "YET means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on one side. inch bore code -008 decodes as 0\" +8/16, i.e. 12.7 mm; the metric coded size YET 203 shares the same envelope but its bore is the metric value, not this one. with no -2F/-2RF suffix the order number denotes the open external execution of the YEL2 size — add external exclusion at the housing and plan relubrication intervals for dusty or wet surroundings." }, { "q": "How does the eccentric locking collar work?", "a": "The collar has an eccentric bore matching an eccentric on the inner ring extension. After sliding it on, turn it in the shaft's running direction until it grips, then tighten the collar's own set screw into its recess. Rotation then self-tightens rather than loosens the lock." }, { "q": "Why is the collar sometimes wider than the bearing (B1)?", "a": "The B1 dimension includes the eccentric collar's axial width, so the housing needs that extra space beside the bearing. Draw housings to B1, not B, when replacing a grub-screw unit with a collar unit." } ], "cross_ref": [ { "equiv_sku": "YET", "equiv_brand": "ISO 15", "level": "full", "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YET-203-008", "YET 203-008" ], "locale_variants": {} }, { "sku": "YET-204-012", "brand": "SKF", "manufacturer_designation": "YET 204-012", "series": "YEL2-series", "type": "insert", "d_mm": 19.049999999999997, "D_mm": 47, "B_mm": 21, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 12.7, "static_load_kN": 6.55, "fatigue_load_limit_kN": 0.28, "limiting_speed_rpm": 8500, "max_rpm": 8500, "weight_g": 170, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YET 204-012 is SKF's 19.049999999999997 mm-bore eccentric-locking-collar insert bearing with a one-side-extended inner ring in the YEL2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 19.049999999999997x47x21 mm. The deep-groove ball set is built into an extended inner ring carrying a separate eccentric locking collar; turning the collar against its eccentric seat pinches the shaft, and the sphered outer ring self-aligns in the housing. the YET prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended one side. the three-digit -012 tail codes the bore in inches for inch-shaft bearings: 0 whole inch 12/16 in = 19.05 mm (first digit whole inches, next two sixteenths of an inch). this suffix-free execution is listed without the sealed external design: the 21 mm width is the one-side-extended inner ring alone, so protection depends on the housing seals and the relubrication routine rather than bearing-mounted contact seals. Envelope 19.049999999999997x47x21 mm (0.75x1.85x0.827 in), outer ring 14 mm wide, C 12.7 kN, C0 6.55 kN, Pu 0.28 kN. Mounted width B1 30.5 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 8,500 r/min; mass 170 g. Selection figures for YET 204-012: C0/C is 0.516, Pu 0.28 kN is 2.205 % of the 12.7 kN dynamic rating, and the 170 g catalogue mass works out to roughly 8.924 g per millimetre of the 19.049999999999997 mm bore. The s1 23.5 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Spherical-seat note in numbers: the 47 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 33.025 = 103.751 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Load balance for documentation: C0 6.55 kN against C 12.7 kN gives a 0.516 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Static-first planning: the 0.312 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 19.049999999999997 mm shaft, not the 12.7 kN L10 value. One-side collar note: the eccentric collar mounts on the extended side only and must turn in the shaft rotation direction to self-tighten; on reversing drives this design can loosen by design intent — choose grub-screw or ConCentra locking for true bidirectional shafts. Direction rule for YET-204-012: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 19.049999999999997 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "lawn and turf equipment", "light drive rollers with plain commercial shafts", "small garden machinery and rotavators" ], "failure_modes": [ "eccentric collar mounted against rotation direction works loose and spins, fretting the shaft", "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "Overall width 30.5 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YET collar.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "The eccentric collar is handed to running direction; fit it wrong on the 19.049999999999997 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "The 12.7/6.55 kN figures belong specifically to YET 204-012; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YET-204-012?", "a": "YET 204-012 measures 19.049999999999997 mm bore x 47 mm OD x 21 mm overall width (outer ring 14 mm wide), 0.75 x 1.85 x 0.827 in; mass about 170 g. SKF 17000 ratings: C 12.7 kN, C0 6.55 kN, Pu 0.28 kN, limiting speed 8,500 r/min." }, { "q": "What does the designation YET 204-012 mean?", "a": "the YET prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended one side. the three-digit -012 tail codes the bore in inches for inch-shaft bearings: 0 whole inch 12/16 in = 19.05 mm (first digit whole inches, next two sixteenths of an inch). this suffix-free execution is listed without the sealed external design: the 21 mm width is the one-side-extended inner ring alone, so protection depends on the housing seals and the relubrication routine rather than bearing-mounted contact seals." }, { "q": "What is the difference between YET and YEL?", "a": "YET has the inner ring extended on one side; YEL extends it on both sides. Both lock with the eccentric collar and share bore/OD geometry; the sealed -2F executions sit in the YEL listings." }, { "q": "Can eccentric-collar bearings run in both directions?", "a": "They are intended for one predominant running direction; true reversing drives can unwind the eccentric. For bidirectional or vibrating shafts choose grub-screw or SKF ConCentra (YSP) locking." } ], "cross_ref": [ { "equiv_sku": "YET", "equiv_brand": "ISO 15", "level": "full", "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YET-204-012", "YET 204-012" ], "locale_variants": {} }, { "sku": "YEL-204-012-2F", "brand": "SKF", "manufacturer_designation": "YEL 204-012-2F", "series": "YEL2-series", "type": "insert", "d_mm": 19.049999999999997, "D_mm": 47, "B_mm": 34.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 12.7, "static_load_kN": 6.55, "fatigue_load_limit_kN": 0.28, "limiting_speed_rpm": 8500, "max_rpm": 8500, "weight_g": 210, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YEL 204-012-2F is SKF's 19.049999999999997 mm-bore eccentric-locking-collar insert bearing with the inner ring extended on both sides in the YEL2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 19.049999999999997x47x34.2 mm. The deep-groove ball set is built into an extended inner ring carrying a separate eccentric locking collar; turning the collar against its eccentric seat pinches the shaft, and the sphered outer ring self-aligns in the housing. the YEL prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended both sides. the three-digit -012 tail codes the bore in inches for inch-shaft bearings: 0 whole inch 12/16 in = 19.05 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 19.049999999999997x47x34.2 mm (0.75x1.85x1.346 in), outer ring 14 mm wide, C 12.7 kN, C0 6.55 kN, Pu 0.28 kN. Mounted width B1 43.7 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 8,500 r/min; mass 210 g. Static-first planning: the 0.192 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 19.049999999999997 mm shaft, not the 12.7 kN L10 value. Grease-life arithmetic is dominated by speed: at dn approx 2.81x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Pitch-diameter arithmetic: dm = (19.049999999999997+47)/2 = 33.025 mm; at the 8,500 r/min limiting speed the ball set runs at dn approx 2.81x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Bore-to-OD planning: OD 47 over bore 19.049999999999997 is a 2.467x step, while bore/overall-width gives 0.557; the spherical seat in the matching Y-housing must be specified to the 47 mm OD, not to a cylindrical housing bore. Selection figures for YEL 204-012-2F: C0/C is 0.516, Pu 0.28 kN is 2.205 % of the 12.7 kN dynamic rating, and the 210 g catalogue mass works out to roughly 11.024 g per millimetre of the 19.049999999999997 mm bore. Two-side sealed collar note: after driving the eccentric collar tight, lock the collar set screw against its recess and verify the collar cannot be turned by hand; a collar that was merely pressed on without the eccentric bite spins on the shaft and frets it within hours. Direction rule for YEL-204-012-2F: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 19.049999999999997 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "small garden machinery and rotavators", "lawn and turf equipment", "light drive rollers with plain commercial shafts" ], "failure_modes": [ "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "eccentric collar mounted against rotation direction works loose and spins, fretting the shaft", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "The eccentric collar is handed to running direction; fit it wrong on the 19.049999999999997 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "Overall width 43.7 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "Catalogue ratings belong to YEL 204-012-2F as the ecc two f execution; other order numbers of the YEL 204-012 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YEL-204-012-2F?", "a": "YEL 204-012-2F measures 19.049999999999997 mm bore x 47 mm OD x 34.2 mm overall width (outer ring 14 mm wide), 0.75 x 1.85 x 1.346 in; mass about 210 g. SKF 17000 ratings: C 12.7 kN, C0 6.55 kN, Pu 0.28 kN, limiting speed 8,500 r/min." }, { "q": "What does the designation YEL 204-012-2F mean?", "a": "the YEL prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended both sides. the three-digit -012 tail codes the bore in inches for inch-shaft bearings: 0 whole inch 12/16 in = 19.05 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "Why is the collar sometimes wider than the bearing (B1)?", "a": "The B1 dimension includes the eccentric collar's axial width, so the housing needs that extra space beside the bearing. Draw housings to B1, not B, when replacing a grub-screw unit with a collar unit." }, { "q": "What is the difference between YET and YEL?", "a": "YET has the inner ring extended on one side; YEL extends it on both sides. Both lock with the eccentric collar and share bore/OD geometry; the sealed -2F executions sit in the YEL listings." } ], "cross_ref": [ { "equiv_sku": "YEL", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YEL-204-012-2F", "YEL 204-012-2F" ], "locale_variants": {} }, { "sku": "YET-205-100", "brand": "SKF", "manufacturer_designation": "YET 205-100", "series": "YEL2-series", "type": "insert", "d_mm": 25.4, "D_mm": 52, "B_mm": 21.5, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 14, "static_load_kN": 7.8, "fatigue_load_limit_kN": 0.335, "limiting_speed_rpm": 7000, "max_rpm": 7000, "weight_g": 190, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YET 205-100 is a eccentric-locking-collar insert bearing with a one-side-extended inner ring, 25.4x52x21.5 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction pairs capped deep-groove geometry with a one-piece eccentric locking collar and a convex outer ring — quick to mount on plain commercial shafts and tolerant of initial static misalignment. reading YET: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended on one side. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -100 = 25.4 mm, which is why this row sits beside, not on, the metric bore size. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units. Envelope 25.4x52x21.5 mm (1x2.047x0.846 in), outer ring 15 mm wide, C 14 kN, C0 7.8 kN, Pu 0.335 kN. Mounted width B1 31 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 7,000 r/min; mass 190 g. The s1 23.5 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Rating split for the maintenance file: dynamic 14 kN (L10), static 7.8 kN (s0 shock check), fatigue 0.335 kN (adjusted life) — three separate uses for YET 205-100, none interchangeable with another. Envelope arithmetic: the radial section from 25.4 mm bore to 52 mm OD is 13.3 mm; dividing C 14 kN by that section gives 1.053 kN per section millimetre, and the 21.5 mm overall width is 1.617x the section. Pitch-diameter arithmetic: dm = (25.4+52)/2 = 38.7 mm; at the 7,000 r/min limiting speed the ball set runs at dn approx 2.71x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Speed ceiling of 7,000 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. One-side collar note: the eccentric collar mounts on the extended side only and must turn in the shaft rotation direction to self-tighten; on reversing drives this design can loosen by design intent — choose grub-screw or ConCentra locking for true bidirectional shafts. Direction rule for YET-205-100: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 25.4 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "agricultural machinery PTO-driven shafts", "one-direction conveyor drives", "ventilation equipment with frequent bearing changes" ], "failure_modes": [ "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "eccentric collar mounted against rotation direction works loose and spins, fretting the shaft", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "Overall width 31 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YET collar.", "The eccentric collar is handed to running direction; fit it wrong on the 25.4 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "The 14/7.8 kN figures belong specifically to YET 205-100; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YET-205-100?", "a": "The catalogue envelope is 25.4x52x21.5 mm with a spherical outside surface; mass 190 g. Ratings C 14/7.8 kN, Pu 0.335 kN, limiting speed 7,000 r/min." }, { "q": "What does the designation YET 205-100 mean?", "a": "reading YET: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended on one side. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -100 = 25.4 mm, which is why this row sits beside, not on, the metric bore size. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units." }, { "q": "Why is the collar sometimes wider than the bearing (B1)?", "a": "The B1 dimension includes the eccentric collar's axial width, so the housing needs that extra space beside the bearing. Draw housings to B1, not B, when replacing a grub-screw unit with a collar unit." }, { "q": "What is the difference between YET and YEL?", "a": "YET has the inner ring extended on one side; YEL extends it on both sides. Both lock with the eccentric collar and share bore/OD geometry; the sealed -2F executions sit in the YEL listings." } ], "cross_ref": [ { "equiv_sku": "YET-205", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x21.5 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YET 205 is the eccentric collar locking, one-side-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YET-205-VL065", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x21.5 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YET 205/VL065 is the eccentric collar locking, one-side-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YET-205-100", "YET 205-100" ], "locale_variants": {} }, { "sku": "YELAG-205-100", "brand": "SKF", "manufacturer_designation": "YELAG 205-100", "series": "YEL2-series", "type": "insert", "d_mm": 25.4, "D_mm": 52, "B_mm": 34.9, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 14, "static_load_kN": 7.8, "fatigue_load_limit_kN": 0.335, "limiting_speed_rpm": 1500, "max_rpm": 1500, "weight_g": 230, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YEL2 series order number YELAG 205-100 is a SKF insert bearing (Y-bearing) for a 25.4 mm (1 in) shaft: eccentric-locking-collar insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 52 mm. Inside sits a sealed ball insert with an eccentric collar on the extended ring: collar bite locks the shaft, the contact seals retain the life grease, and the spherical OD floats in the Y-housing. YEL means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on both sides. inch bore code -100 decodes as 1\", i.e. 25.4 mm; the metric coded size YELAG 205 shares the same envelope but its bore is the metric value, not this one. the AG suffix identifies the farm-duty variant of the range: sealed and flinger-protected for chaff and dust, with the catalogue deliberately derating its permissible speed versus the industrial execution. Envelope 25.4x52x34.9 mm (1x2.047x1.374 in), outer ring 15 mm wide, C 14 kN, C0 7.8 kN, Pu 0.335 kN. Mounted width B1 44.4 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 1,500 r/min; mass 230 g. Imperial procurement cross-check: 1 in bore, 2.047 in OD, 1.374 in overall width; the 230 g mass converts to 0.230 kg (8.1 oz) for the bill of materials. Selection figures for YELAG 205-100: C0/C is 0.557, Pu 0.335 kN is 2.393 % of the 14 kN dynamic rating, and the 230 g catalogue mass works out to roughly 9.055 g per millimetre of the 25.4 mm bore. Fillet discipline: the printed r_min 0.6 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 25.4x52 mm insert on its chamfer tilts the whole spherical seat. At the printed limiting speed of 1,500 r/min the mean diameter dm = 38.7 mm implies dn about 0.58x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Pitch-diameter arithmetic: dm = (25.4+52)/2 = 38.7 mm; at the 1,500 r/min limiting speed the ball set runs at dn approx 0.58x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Direction rule for YELAG-205-100: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 25.4 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "agricultural machinery PTO-driven shafts", "ventilation equipment with frequent bearing changes", "tiller and cultivator rotors" ], "failure_modes": [ "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "burr or paint under the eccentric faces prevents full bite, leaving an eccentric preload that runs hot", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "Overall width 44.4 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "The eccentric collar is handed to running direction; fit it wrong on the 25.4 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "The 14/7.8 kN figures belong specifically to YELAG 205-100; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YELAG-205-100?", "a": "Boundary dimensions: bore 25.4 mm, sphered OD 52 mm, overall width 34.9 mm (44.4 mm with the collar); weight 230 g. Loads: dynamic 14 kN, static 7.8 kN, fatigue 0.335 kN; the only published speed is the 1,500 r/min limiting value." }, { "q": "What does the designation YELAG 205-100 mean?", "a": "YEL means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on both sides. inch bore code -100 decodes as 1\", i.e. 25.4 mm; the metric coded size YELAG 205 shares the same envelope but its bore is the metric value, not this one. the AG suffix identifies the farm-duty variant of the range: sealed and flinger-protected for chaff and dust, with the catalogue deliberately derating its permissible speed versus the industrial execution." }, { "q": "Can eccentric-collar bearings run in both directions?", "a": "They are intended for one predominant running direction; true reversing drives can unwind the eccentric. For bidirectional or vibrating shafts choose grub-screw or SKF ConCentra (YSP) locking." }, { "q": "How does the eccentric locking collar work?", "a": "The collar has an eccentric bore matching an eccentric on the inner ring extension. After sliding it on, turn it in the shaft's running direction until it grips, then tighten the collar's own set screw into its recess. Rotation then self-tightens rather than loosens the lock." } ], "cross_ref": [ { "equiv_sku": "YELAG-205", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 205 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YEL-205-2RF-VL065", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 205-2RF/VL065 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YEL-205-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 205-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YEL-205-100-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 205-100-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YELAG-205-100", "YELAG 205-100" ], "locale_variants": {} }, { "sku": "YEL-205-100-2F", "brand": "SKF", "manufacturer_designation": "YEL 205-100-2F", "series": "YEL2-series", "type": "insert", "d_mm": 25.4, "D_mm": 52, "B_mm": 34.9, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 14, "static_load_kN": 7.8, "fatigue_load_limit_kN": 0.335, "limiting_speed_rpm": 7000, "max_rpm": 7000, "weight_g": 240, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YEL2 series order number YEL 205-100-2F is a SKF insert bearing (Y-bearing) for a 25.4 mm (1 in) shaft: eccentric-locking-collar insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 52 mm. Inside sits a sealed ball insert with an eccentric collar on the extended ring: collar bite locks the shaft, the contact seals retain the life grease, and the spherical OD floats in the Y-housing. YEL means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on both sides. inch bore code -100 decodes as 1\", i.e. 25.4 mm; the metric coded size YEL 205 shares the same envelope but its bore is the metric value, not this one. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 25.4x52x34.9 mm (1x2.047x1.374 in), outer ring 15 mm wide, C 14 kN, C0 7.8 kN, Pu 0.335 kN. Mounted width B1 44.4 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 7,000 r/min; mass 240 g. Bore-to-OD planning: OD 52 over bore 25.4 is a 2.047x step, while bore/overall-width gives 0.728; the spherical seat in the matching Y-housing must be specified to the 52 mm OD, not to a cylindrical housing bore. Static-first planning: the 0.223 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 25.4 mm shaft, not the 14 kN L10 value. Rating split for the maintenance file: dynamic 14 kN (L10), static 7.8 kN (s0 shock check), fatigue 0.335 kN (adjusted life) — three separate uses for YEL 205-100-2F, none interchangeable with another. Speed ceiling of 7,000 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Spherical-seat note in numbers: the 52 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 38.7 = 121.58 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Two-side sealed collar note: after driving the eccentric collar tight, lock the collar set screw against its recess and verify the collar cannot be turned by hand; a collar that was merely pressed on without the eccentric bite spins on the shaft and frets it within hours. Collar geometry for this size: over the 15 mm outer-ring width the inner ring runs to 34.9 mm overall (44.4 mm including the eccentric collar width), giving the collar its eccentric seating face clear of the seal.", "applications": [ "tiller and cultivator rotors", "agricultural machinery PTO-driven shafts", "one-direction conveyor drives" ], "failure_modes": [ "collar set screw not locked into its recess: the collar unwinds and the bearing walks off its seat", "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "The eccentric collar is handed to running direction; fit it wrong on the 25.4 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "Overall width 44.4 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "Catalogue ratings belong to YEL 205-100-2F as the ecc two f execution; other order numbers of the YEL 205-100 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YEL-205-100-2F?", "a": "Boundary dimensions: bore 25.4 mm, sphered OD 52 mm, overall width 34.9 mm (44.4 mm with the collar); weight 240 g. Loads: dynamic 14 kN, static 7.8 kN, fatigue 0.335 kN; the only published speed is the 7,000 r/min limiting value." }, { "q": "What does the designation YEL 205-100-2F mean?", "a": "YEL means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on both sides. inch bore code -100 decodes as 1\", i.e. 25.4 mm; the metric coded size YEL 205 shares the same envelope but its bore is the metric value, not this one. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "What is the difference between YET and YEL?", "a": "YET has the inner ring extended on one side; YEL extends it on both sides. Both lock with the eccentric collar and share bore/OD geometry; the sealed -2F executions sit in the YEL listings." }, { "q": "Can eccentric-collar bearings run in both directions?", "a": "They are intended for one predominant running direction; true reversing drives can unwind the eccentric. For bidirectional or vibrating shafts choose grub-screw or SKF ConCentra (YSP) locking." } ], "cross_ref": [ { "equiv_sku": "YELAG-205", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 205 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YEL-205-2RF-VL065", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 205-2RF/VL065 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YEL-205-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 205-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YELAG-205-100", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x34.9 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 205-100 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YEL-205-100-2F", "YEL 205-100-2F" ], "locale_variants": {} }, { "sku": "YET-206-102", "brand": "SKF", "manufacturer_designation": "YET 206-102", "series": "YEL2-series", "type": "insert", "d_mm": 28.575, "D_mm": 62, "B_mm": 23.8, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 19.5, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 6300, "max_rpm": 6300, "weight_g": 340, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YET 206-102 is a eccentric-locking-collar insert bearing with a one-side-extended inner ring, 28.575x62x23.8 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction pairs capped deep-groove geometry with a one-piece eccentric locking collar and a convex outer ring — quick to mount on plain commercial shafts and tolerant of initial static misalignment. reading YET: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended on one side. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -102 = 28.575 mm, which is why this row sits beside, not on, the metric bore size. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units. Envelope 28.575x62x23.8 mm (1.125x2.441x0.937 in), outer ring 18 mm wide, C 19.5 kN, C0 11.2 kN, Pu 0.475 kN. Mounted width B1 35.7 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 6,300 r/min; mass 340 g. The s1 26.7 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Load balance for documentation: C0 11.2 kN against C 19.5 kN gives a 0.574 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Outer-vs-overall width: the outer ring is 18 mm wide inside the 23.8 mm total, so the extended inner ring accounts for 0.244 of the overall width (5.8 mm of axial projection on the locking side). Fillet discipline: the printed r_min 0.6 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 28.575x62 mm insert on its chamfer tilts the whole spherical seat. Envelope arithmetic: the radial section from 28.575 mm bore to 62 mm OD is 16.712 mm; dividing C 19.5 kN by that section gives 1.167 kN per section millimetre, and the 23.8 mm overall width is 1.424x the section. One-side collar note: the eccentric collar mounts on the extended side only and must turn in the shaft rotation direction to self-tighten; on reversing drives this design can loosen by design intent — choose grub-screw or ConCentra locking for true bidirectional shafts. Collar geometry for this size: over the 18 mm outer-ring width the inner ring runs to 23.8 mm overall (35.7 mm including the eccentric collar width), giving the collar its eccentric seating face clear of the seal.", "applications": [ "agricultural machinery PTO-driven shafts", "ventilation equipment with frequent bearing changes", "tiller and cultivator rotors" ], "failure_modes": [ "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "burr or paint under the eccentric faces prevents full bite, leaving an eccentric preload that runs hot", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "The eccentric collar is handed to running direction; fit it wrong on the 28.575 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Overall width 35.7 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YET collar.", "Ordering discipline for the 28.575 mm size: the chapter lists several executions side by side (YEL2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YET-206-102?", "a": "The catalogue envelope is 28.575x62x23.8 mm with a spherical outside surface; mass 340 g. Ratings C 19.5/11.2 kN, Pu 0.475 kN, limiting speed 6,300 r/min." }, { "q": "What does the designation YET 206-102 mean?", "a": "reading YET: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended on one side. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -102 = 28.575 mm, which is why this row sits beside, not on, the metric bore size. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units." }, { "q": "What is the difference between YET and YEL?", "a": "YET has the inner ring extended on one side; YEL extends it on both sides. Both lock with the eccentric collar and share bore/OD geometry; the sealed -2F executions sit in the YEL listings." }, { "q": "Can eccentric-collar bearings run in both directions?", "a": "They are intended for one predominant running direction; true reversing drives can unwind the eccentric. For bidirectional or vibrating shafts choose grub-screw or SKF ConCentra (YSP) locking." } ], "cross_ref": [ { "equiv_sku": "YET", "equiv_brand": "ISO 15", "level": "full", "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YET-206-102", "YET 206-102" ], "locale_variants": {} }, { "sku": "YELAG-206-102", "brand": "SKF", "manufacturer_designation": "YELAG 206-102", "series": "YEL2-series", "type": "insert", "d_mm": 28.575, "D_mm": 62, "B_mm": 36.5, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 19.5, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 1200, "max_rpm": 1200, "weight_g": 400, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YELAG 206-102 is SKF's 28.575 mm-bore eccentric-locking-collar insert bearing with the inner ring extended on both sides in the YEL2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 28.575x62x36.5 mm. The deep-groove ball set is built into an extended inner ring carrying a separate eccentric locking collar; turning the collar against its eccentric seat pinches the shaft, and the sphered outer ring self-aligns in the housing. the YEL prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended both sides. the three-digit -102 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 2/16 in = 28.575 mm (first digit whole inches, next two sixteenths of an inch). AG marks the agricultural-machinery application execution, built on the sealed both-sides-extended geometry and tuned for the low-speed, shock-laden duty of harvesters, balers and spreaders — note the catalogue prints a much reduced limiting speed for this variant. Envelope 28.575x62x36.5 mm (1.125x2.441x1.437 in), outer ring 18 mm wide, C 19.5 kN, C0 11.2 kN, Pu 0.475 kN. Mounted width B1 48.4 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 1,200 r/min; mass 400 g. Pitch-diameter arithmetic: dm = (28.575+62)/2 = 45.288 mm; at the 1,200 r/min limiting speed the ball set runs at dn approx 0.54x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Capacity density: 19.5 kN from 0.400 kg of bearing steel is about 48.75 kN per kilogram, and per width millimetre the 36.5 mm unit carries 0.534 kN of dynamic capacity. Spherical-seat note in numbers: the 62 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 45.288 = 142.276 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Fatigue-limit check: Pu 0.475 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YELAG 206-102 — most belt-driven mounted-unit loads sit comfortably under 2.436 % of C. Mass-to-load ratio for YELAG-206-102: 20.513 g of catalogue mass per rated kN of C, and 13.998 g per millimetre of bore — useful when comparing executions of the same 28.575x62 mm envelope on the drawing. Collar geometry for this size: over the 18 mm outer-ring width the inner ring runs to 36.5 mm overall (48.4 mm including the eccentric collar width), giving the collar its eccentric seating face clear of the seal.", "applications": [ "tiller and cultivator rotors", "one-direction conveyor drives", "agricultural machinery PTO-driven shafts" ], "failure_modes": [ "collar set screw not locked into its recess: the collar unwinds and the bearing walks off its seat", "eccentric collar mounted against rotation direction works loose and spins, fretting the shaft", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "Overall width 48.4 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "The eccentric collar is handed to running direction; fit it wrong on the 28.575 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "The 19.5/11.2 kN figures belong specifically to YELAG 206-102; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YELAG-206-102?", "a": "YELAG 206-102 measures 28.575 mm bore x 62 mm OD x 36.5 mm overall width (outer ring 18 mm wide), 1.125 x 2.441 x 1.437 in; mass about 400 g. SKF 17000 ratings: C 19.5 kN, C0 11.2 kN, Pu 0.475 kN, limiting speed 1,200 r/min." }, { "q": "What does the designation YELAG 206-102 mean?", "a": "the YEL prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended both sides. the three-digit -102 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 2/16 in = 28.575 mm (first digit whole inches, next two sixteenths of an inch). AG marks the agricultural-machinery application execution, built on the sealed both-sides-extended geometry and tuned for the low-speed, shock-laden duty of harvesters, balers and spreaders — note the catalogue prints a much reduced limiting speed for this variant." }, { "q": "How does the eccentric locking collar work?", "a": "The collar has an eccentric bore matching an eccentric on the inner ring extension. After sliding it on, turn it in the shaft's running direction until it grips, then tighten the collar's own set screw into its recess. Rotation then self-tightens rather than loosens the lock." }, { "q": "Why is the collar sometimes wider than the bearing (B1)?", "a": "The B1 dimension includes the eccentric collar's axial width, so the housing needs that extra space beside the bearing. Draw housings to B1, not B, when replacing a grub-screw unit with a collar unit." } ], "cross_ref": [ { "equiv_sku": "YEL-206-102-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 28.575x62x36.5 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 206-102-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YELAG-206-102", "YELAG 206-102" ], "locale_variants": {} }, { "sku": "YEL-206-102-2F", "brand": "SKF", "manufacturer_designation": "YEL 206-102-2F", "series": "YEL2-series", "type": "insert", "d_mm": 28.575, "D_mm": 62, "B_mm": 36.5, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 19.5, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 6300, "max_rpm": 6300, "weight_g": 410, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YEL2 series order number YEL 206-102-2F is a SKF insert bearing (Y-bearing) for a 28.575 mm (1.125 in) shaft: eccentric-locking-collar insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 62 mm. Inside sits a sealed ball insert with an eccentric collar on the extended ring: collar bite locks the shaft, the contact seals retain the life grease, and the spherical OD floats in the Y-housing. YEL means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on both sides. inch bore code -102 decodes as 1\" +2/16, i.e. 28.575 mm; the metric coded size YEL 206 shares the same envelope but its bore is the metric value, not this one. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 28.575x62x36.5 mm (1.125x2.441x1.437 in), outer ring 18 mm wide, C 19.5 kN, C0 11.2 kN, Pu 0.475 kN. Mounted width B1 48.4 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 6,300 r/min; mass 410 g. Static-first planning: the 0.307 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 28.575 mm shaft, not the 19.5 kN L10 value. At the printed limiting speed of 6,300 r/min the mean diameter dm = 45.288 mm implies dn about 2.85x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Mass-to-load ratio for YEL-206-102-2F: 21.026 g of catalogue mass per rated kN of C, and 14.348 g per millimetre of bore — useful when comparing executions of the same 28.575x62 mm envelope on the drawing. Width accounting: B1 48.4 mm covers the bearing WITH its eccentric locking collar against 36.5 mm for the bearing itself and 18 mm outer-ring width; housing axial space is drawn to B1, seal replacement space to B. Load balance for documentation: C0 11.2 kN against C 19.5 kN gives a 0.574 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Two-side sealed collar note: after driving the eccentric collar tight, lock the collar set screw against its recess and verify the collar cannot be turned by hand; a collar that was merely pressed on without the eccentric bite spins on the shaft and frets it within hours. Direction rule for YEL-206-102-2F: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 28.575 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "agricultural machinery PTO-driven shafts", "one-direction conveyor drives", "ventilation equipment with frequent bearing changes" ], "failure_modes": [ "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "eccentric collar mounted against rotation direction works loose and spins, fretting the shaft", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "The eccentric collar is handed to running direction; fit it wrong on the 28.575 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Overall width 48.4 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "Ordering discipline for the 28.575 mm size: the chapter lists several executions side by side (YEL2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YEL-206-102-2F?", "a": "Boundary dimensions: bore 28.575 mm, sphered OD 62 mm, overall width 36.5 mm (48.4 mm with the collar); weight 410 g. Loads: dynamic 19.5 kN, static 11.2 kN, fatigue 0.475 kN; the only published speed is the 6,300 r/min limiting value." }, { "q": "What does the designation YEL 206-102-2F mean?", "a": "YEL means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on both sides. inch bore code -102 decodes as 1\" +2/16, i.e. 28.575 mm; the metric coded size YEL 206 shares the same envelope but its bore is the metric value, not this one. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "Why is the collar sometimes wider than the bearing (B1)?", "a": "The B1 dimension includes the eccentric collar's axial width, so the housing needs that extra space beside the bearing. Draw housings to B1, not B, when replacing a grub-screw unit with a collar unit." }, { "q": "What is the difference between YET and YEL?", "a": "YET has the inner ring extended on one side; YEL extends it on both sides. Both lock with the eccentric collar and share bore/OD geometry; the sealed -2F executions sit in the YEL listings." } ], "cross_ref": [ { "equiv_sku": "YELAG-206-102", "equiv_brand": "SKF", "level": "full", "note": "Same 28.575x62x36.5 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 206-102 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YEL-206-102-2F", "YEL 206-102-2F" ], "locale_variants": {} }, { "sku": "YET-206-103", "brand": "SKF", "manufacturer_designation": "YET 206-103", "series": "YEL2-series", "type": "insert", "d_mm": 30.162499999999998, "D_mm": 62, "B_mm": 23.8, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 19.5, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 6300, "max_rpm": 6300, "weight_g": 320, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YET 206-103 is SKF's 30.162499999999998 mm-bore eccentric-locking-collar insert bearing with a one-side-extended inner ring in the YEL2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 30.162499999999998x62x23.8 mm. The deep-groove ball set is built into an extended inner ring carrying a separate eccentric locking collar; turning the collar against its eccentric seat pinches the shaft, and the sphered outer ring self-aligns in the housing. the YET prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended one side. the three-digit -103 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 3/16 in = 30.162 mm (first digit whole inches, next two sixteenths of an inch). this suffix-free execution is listed without the sealed external design: the 23.8 mm width is the one-side-extended inner ring alone, so protection depends on the housing seals and the relubrication routine rather than bearing-mounted contact seals. Envelope 30.162499999999998x62x23.8 mm (1.188x2.441x0.937 in), outer ring 18 mm wide, C 19.5 kN, C0 11.2 kN, Pu 0.475 kN. Mounted width B1 35.7 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 6,300 r/min; mass 320 g. The s1 26.7 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 39.7 mm, d2 44.1 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the inner flinger. Pitch-diameter arithmetic: dm = (30.162499999999998+62)/2 = 46.081 mm; at the 6,300 r/min limiting speed the ball set runs at dn approx 2.90x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Selection figures for YET 206-103: C0/C is 0.574, Pu 0.475 kN is 2.436 % of the 19.5 kN dynamic rating, and the 320 g catalogue mass works out to roughly 10.609 g per millimetre of the 30.162499999999998 mm bore. Imperial procurement cross-check: 1.188 in bore, 2.441 in OD, 0.937 in overall width; the 320 g mass converts to 0.320 kg (11.3 oz) for the bill of materials. One-side collar note: the eccentric collar mounts on the extended side only and must turn in the shaft rotation direction to self-tighten; on reversing drives this design can loosen by design intent — choose grub-screw or ConCentra locking for true bidirectional shafts. Direction rule for YET-206-103: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 30.162499999999998 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "agricultural machinery PTO-driven shafts", "one-direction conveyor drives", "ventilation equipment with frequent bearing changes" ], "failure_modes": [ "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "eccentric collar mounted against rotation direction works loose and spins, fretting the shaft", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "The eccentric collar is handed to running direction; fit it wrong on the 30.162499999999998 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Overall width 35.7 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YET collar.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "Catalogue ratings belong to YET 206-103 as the ecc one open execution; other order numbers of the YET 206-103 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YET-206-103?", "a": "YET 206-103 measures 30.162499999999998 mm bore x 62 mm OD x 23.8 mm overall width (outer ring 18 mm wide), 1.188 x 2.441 x 0.937 in; mass about 320 g. SKF 17000 ratings: C 19.5 kN, C0 11.2 kN, Pu 0.475 kN, limiting speed 6,300 r/min." }, { "q": "What does the designation YET 206-103 mean?", "a": "the YET prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended one side. the three-digit -103 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 3/16 in = 30.162 mm (first digit whole inches, next two sixteenths of an inch). this suffix-free execution is listed without the sealed external design: the 23.8 mm width is the one-side-extended inner ring alone, so protection depends on the housing seals and the relubrication routine rather than bearing-mounted contact seals." }, { "q": "Why is the collar sometimes wider than the bearing (B1)?", "a": "The B1 dimension includes the eccentric collar's axial width, so the housing needs that extra space beside the bearing. Draw housings to B1, not B, when replacing a grub-screw unit with a collar unit." }, { "q": "What is the difference between YET and YEL?", "a": "YET has the inner ring extended on one side; YEL extends it on both sides. Both lock with the eccentric collar and share bore/OD geometry; the sealed -2F executions sit in the YEL listings." } ], "cross_ref": [ { "equiv_sku": "YET-206", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x23.8 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YET 206 is the eccentric collar locking, one-side-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YET-206-VL065", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x23.8 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YET 206/VL065 is the eccentric collar locking, one-side-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YET-206-103", "YET 206-103" ], "locale_variants": {} }, { "sku": "YELAG-206-103", "brand": "SKF", "manufacturer_designation": "YELAG 206-103", "series": "YEL2-series", "type": "insert", "d_mm": 30.162499999999998, "D_mm": 62, "B_mm": 36.5, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 19.5, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 1200, "max_rpm": 1200, "weight_g": 370, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YELAG 206-103 is a eccentric-locking-collar insert bearing with the inner ring extended on both sides, 30.162499999999998x62x36.5 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction pairs capped deep-groove geometry with a one-piece eccentric locking collar and a convex outer ring — quick to mount on plain commercial shafts and tolerant of initial static misalignment. reading YEL: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended symmetrically both sides. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -103 = 30.162 mm, which is why this row sits beside, not on, the metric bore size. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery. Envelope 30.162499999999998x62x36.5 mm (1.188x2.441x1.437 in), outer ring 18 mm wide, C 19.5 kN, C0 11.2 kN, Pu 0.475 kN. Mounted width B1 48.4 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 1,200 r/min; mass 370 g. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 39.7 mm, d2 44.1 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the inner flinger. Outer-vs-overall width: the outer ring is 18 mm wide inside the 36.5 mm total, so the extended inner ring accounts for 0.507 of the overall width (9.25 mm of axial projection per side). Imperial procurement cross-check: 1.188 in bore, 2.441 in OD, 1.437 in overall width; the 370 g mass converts to 0.370 kg (13.1 oz) for the bill of materials. Selection figures for YELAG 206-103: C0/C is 0.574, Pu 0.475 kN is 2.436 % of the 19.5 kN dynamic rating, and the 370 g catalogue mass works out to roughly 12.267 g per millimetre of the 30.162499999999998 mm bore. Envelope arithmetic: the radial section from 30.162499999999998 mm bore to 62 mm OD is 15.919 mm; dividing C 19.5 kN by that section gives 1.225 kN per section millimetre, and the 36.5 mm overall width is 2.293x the section. Collar geometry for this size: over the 18 mm outer-ring width the inner ring runs to 36.5 mm overall (48.4 mm including the eccentric collar width), giving the collar its eccentric seating face clear of the seal.", "applications": [ "ventilation equipment with frequent bearing changes", "tiller and cultivator rotors", "one-direction conveyor drives" ], "failure_modes": [ "burr or paint under the eccentric faces prevents full bite, leaving an eccentric preload that runs hot", "collar set screw not locked into its recess: the collar unwinds and the bearing walks off its seat", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "Overall width 48.4 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "The eccentric collar is handed to running direction; fit it wrong on the 30.162499999999998 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Ordering discipline for the 30.162499999999998 mm size: the chapter lists several executions side by side (YEL2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YELAG-206-103?", "a": "The catalogue envelope is 30.162499999999998x62x36.5 mm with a spherical outside surface; mass 370 g. Ratings C 19.5/11.2 kN, Pu 0.475 kN, limiting speed 1,200 r/min." }, { "q": "What does the designation YELAG 206-103 mean?", "a": "reading YEL: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended symmetrically both sides. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -103 = 30.162 mm, which is why this row sits beside, not on, the metric bore size. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery." }, { "q": "Can eccentric-collar bearings run in both directions?", "a": "They are intended for one predominant running direction; true reversing drives can unwind the eccentric. For bidirectional or vibrating shafts choose grub-screw or SKF ConCentra (YSP) locking." }, { "q": "How does the eccentric locking collar work?", "a": "The collar has an eccentric bore matching an eccentric on the inner ring extension. After sliding it on, turn it in the shaft's running direction until it grips, then tighten the collar's own set screw into its recess. Rotation then self-tightens rather than loosens the lock." } ], "cross_ref": [ { "equiv_sku": "YELAG-206", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x36.5 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 206 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YEL-206-2RF-VL065", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x36.5 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 206-2RF/VL065 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YEL-206-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x36.5 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 206-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YEL-206-103-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x36.5 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 206-103-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YELAG-206-103", "YELAG 206-103" ], "locale_variants": {} }, { "sku": "YEL-206-103-2F", "brand": "SKF", "manufacturer_designation": "YEL 206-103-2F", "series": "YEL2-series", "type": "insert", "d_mm": 30.162499999999998, "D_mm": 62, "B_mm": 36.5, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 19.5, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 6300, "max_rpm": 6300, "weight_g": 380, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YEL 206-103-2F is a eccentric-locking-collar insert bearing with the inner ring extended on both sides, 30.162499999999998x62x36.5 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction pairs capped deep-groove geometry with a one-piece eccentric locking collar and a convex outer ring — quick to mount on plain commercial shafts and tolerant of initial static misalignment. reading YEL: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended symmetrically both sides. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -103 = 30.162 mm, which is why this row sits beside, not on, the metric bore size. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution. Envelope 30.162499999999998x62x36.5 mm (1.188x2.441x1.437 in), outer ring 18 mm wide, C 19.5 kN, C0 11.2 kN, Pu 0.475 kN. Mounted width B1 48.4 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 6,300 r/min; mass 380 g. Load balance for documentation: C0 11.2 kN against C 19.5 kN gives a 0.574 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Selection figures for YEL 206-103-2F: C0/C is 0.574, Pu 0.475 kN is 2.436 % of the 19.5 kN dynamic rating, and the 380 g catalogue mass works out to roughly 12.598 g per millimetre of the 30.162499999999998 mm bore. Mass-to-load ratio for YEL-206-103-2F: 19.487 g of catalogue mass per rated kN of C, and 12.598 g per millimetre of bore — useful when comparing executions of the same 30.162499999999998x62 mm envelope on the drawing. Bore-to-OD planning: OD 62 over bore 30.162499999999998 is a 2.056x step, while bore/overall-width gives 0.826; the spherical seat in the matching Y-housing must be specified to the 62 mm OD, not to a cylindrical housing bore. Speed ceiling of 6,300 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Two-side sealed collar note: after driving the eccentric collar tight, lock the collar set screw against its recess and verify the collar cannot be turned by hand; a collar that was merely pressed on without the eccentric bite spins on the shaft and frets it within hours. Collar geometry for this size: over the 18 mm outer-ring width the inner ring runs to 36.5 mm overall (48.4 mm including the eccentric collar width), giving the collar its eccentric seating face clear of the seal.", "applications": [ "agricultural machinery PTO-driven shafts", "ventilation equipment with frequent bearing changes", "tiller and cultivator rotors" ], "failure_modes": [ "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "burr or paint under the eccentric faces prevents full bite, leaving an eccentric preload that runs hot", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "The eccentric collar is handed to running direction; fit it wrong on the 30.162499999999998 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Overall width 48.4 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "Catalogue ratings belong to YEL 206-103-2F as the ecc two f execution; other order numbers of the YEL 206-103 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YEL-206-103-2F?", "a": "The catalogue envelope is 30.162499999999998x62x36.5 mm with a spherical outside surface; mass 380 g. Ratings C 19.5/11.2 kN, Pu 0.475 kN, limiting speed 6,300 r/min." }, { "q": "What does the designation YEL 206-103-2F mean?", "a": "reading YEL: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended symmetrically both sides. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -103 = 30.162 mm, which is why this row sits beside, not on, the metric bore size. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution." }, { "q": "What is the difference between YET and YEL?", "a": "YET has the inner ring extended on one side; YEL extends it on both sides. Both lock with the eccentric collar and share bore/OD geometry; the sealed -2F executions sit in the YEL listings." }, { "q": "Can eccentric-collar bearings run in both directions?", "a": "They are intended for one predominant running direction; true reversing drives can unwind the eccentric. For bidirectional or vibrating shafts choose grub-screw or SKF ConCentra (YSP) locking." } ], "cross_ref": [ { "equiv_sku": "YELAG-206", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x36.5 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 206 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YEL-206-2RF-VL065", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x36.5 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 206-2RF/VL065 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YEL-206-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x36.5 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 206-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YELAG-206-103", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x36.5 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 206-103 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YEL-206-103-2F", "YEL 206-103-2F" ], "locale_variants": {} }, { "sku": "YET-206-104", "brand": "SKF", "manufacturer_designation": "YET 206-104", "series": "YEL2-series", "type": "insert", "d_mm": 31.75, "D_mm": 62, "B_mm": 23.8, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 19.5, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 6300, "max_rpm": 6300, "weight_g": 300, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YET 206-104 is SKF's 31.75 mm-bore eccentric-locking-collar insert bearing with a one-side-extended inner ring in the YEL2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 31.75x62x23.8 mm. The deep-groove ball set is built into an extended inner ring carrying a separate eccentric locking collar; turning the collar against its eccentric seat pinches the shaft, and the sphered outer ring self-aligns in the housing. the YET prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended one side. the three-digit -104 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 4/16 in = 31.75 mm (first digit whole inches, next two sixteenths of an inch). this suffix-free execution is listed without the sealed external design: the 23.8 mm width is the one-side-extended inner ring alone, so protection depends on the housing seals and the relubrication routine rather than bearing-mounted contact seals. Envelope 31.75x62x23.8 mm (1.25x2.441x0.937 in), outer ring 18 mm wide, C 19.5 kN, C0 11.2 kN, Pu 0.475 kN. Mounted width B1 35.7 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 6,300 r/min; mass 300 g. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 39.7 mm, d2 44.1 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the inner flinger. Fillet discipline: the printed r_min 0.6 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 31.75x62 mm insert on its chamfer tilts the whole spherical seat. Spherical-seat note in numbers: the 62 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 46.875 = 147.262 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Static-first planning: the 0.471 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 31.75 mm shaft, not the 19.5 kN L10 value. Capacity density: 19.5 kN from 0.300 kg of bearing steel is about 65 kN per kilogram, and per width millimetre the 23.8 mm unit carries 0.819 kN of dynamic capacity. One-side collar note: the eccentric collar mounts on the extended side only and must turn in the shaft rotation direction to self-tighten; on reversing drives this design can loosen by design intent — choose grub-screw or ConCentra locking for true bidirectional shafts. Direction rule for YET-206-104: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 31.75 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "ventilation equipment with frequent bearing changes", "tiller and cultivator rotors", "one-direction conveyor drives" ], "failure_modes": [ "burr or paint under the eccentric faces prevents full bite, leaving an eccentric preload that runs hot", "collar set screw not locked into its recess: the collar unwinds and the bearing walks off its seat", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "The eccentric collar is handed to running direction; fit it wrong on the 31.75 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Overall width 35.7 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YET collar.", "Ordering discipline for the 31.75 mm size: the chapter lists several executions side by side (YEL2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YET-206-104?", "a": "YET 206-104 measures 31.75 mm bore x 62 mm OD x 23.8 mm overall width (outer ring 18 mm wide), 1.25 x 2.441 x 0.937 in; mass about 300 g. SKF 17000 ratings: C 19.5 kN, C0 11.2 kN, Pu 0.475 kN, limiting speed 6,300 r/min." }, { "q": "What does the designation YET 206-104 mean?", "a": "the YET prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended one side. the three-digit -104 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 4/16 in = 31.75 mm (first digit whole inches, next two sixteenths of an inch). this suffix-free execution is listed without the sealed external design: the 23.8 mm width is the one-side-extended inner ring alone, so protection depends on the housing seals and the relubrication routine rather than bearing-mounted contact seals." }, { "q": "How does the eccentric locking collar work?", "a": "The collar has an eccentric bore matching an eccentric on the inner ring extension. After sliding it on, turn it in the shaft's running direction until it grips, then tighten the collar's own set screw into its recess. Rotation then self-tightens rather than loosens the lock." }, { "q": "Why is the collar sometimes wider than the bearing (B1)?", "a": "The B1 dimension includes the eccentric collar's axial width, so the housing needs that extra space beside the bearing. Draw housings to B1, not B, when replacing a grub-screw unit with a collar unit." } ], "cross_ref": [ { "equiv_sku": "YET", "equiv_brand": "ISO 15", "level": "full", "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YET-206-104", "YET 206-104" ], "locale_variants": {} }, { "sku": "YET-207-104", "brand": "SKF", "manufacturer_designation": "YET 207-104", "series": "YEL2-series", "type": "insert", "d_mm": 31.75, "D_mm": 72, "B_mm": 25.4, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 5300, "max_rpm": 5300, "weight_g": 510, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YET 207-104 is a eccentric-locking-collar insert bearing with a one-side-extended inner ring, 31.75x72x25.4 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction pairs capped deep-groove geometry with a one-piece eccentric locking collar and a convex outer ring — quick to mount on plain commercial shafts and tolerant of initial static misalignment. reading YET: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended on one side. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -104 = 31.75 mm, which is why this row sits beside, not on, the metric bore size. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units. Envelope 31.75x72x25.4 mm (1.25x2.835x1 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. Mounted width B1 38.9 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 5,300 r/min; mass 510 g. Mass-to-load ratio for YET-207-104: 20 g of catalogue mass per rated kN of C, and 16.063 g per millimetre of bore — useful when comparing executions of the same 31.75x72 mm envelope on the drawing. Capacity density: 25.5 kN from 0.510 kg of bearing steel is about 50 kN per kilogram, and per width millimetre the 25.4 mm unit carries 1.004 kN of dynamic capacity. Envelope arithmetic: the radial section from 31.75 mm bore to 72 mm OD is 20.125 mm; dividing C 25.5 kN by that section gives 1.267 kN per section millimetre, and the 25.4 mm overall width is 1.262x the section. Rating split for the maintenance file: dynamic 25.5 kN (L10), static 15.3 kN (s0 shock check), fatigue 0.655 kN (adjusted life) — three separate uses for YET 207-104, none interchangeable with another. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 31.75x72 mm insert on its chamfer tilts the whole spherical seat. One-side collar note: the eccentric collar mounts on the extended side only and must turn in the shaft rotation direction to self-tighten; on reversing drives this design can loosen by design intent — choose grub-screw or ConCentra locking for true bidirectional shafts. Direction rule for YET-207-104: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 31.75 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "tiller and cultivator rotors", "ventilation equipment with frequent bearing changes", "one-direction conveyor drives" ], "failure_modes": [ "collar set screw not locked into its recess: the collar unwinds and the bearing walks off its seat", "burr or paint under the eccentric faces prevents full bite, leaving an eccentric preload that runs hot", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "The eccentric collar is handed to running direction; fit it wrong on the 31.75 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "Overall width 38.9 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YET collar.", "Catalogue ratings belong to YET 207-104 as the ecc one open execution; other order numbers of the YET 207-104 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YET-207-104?", "a": "The catalogue envelope is 31.75x72x25.4 mm with a spherical outside surface; mass 510 g. Ratings C 25.5/15.3 kN, Pu 0.655 kN, limiting speed 5,300 r/min." }, { "q": "What does the designation YET 207-104 mean?", "a": "reading YET: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended on one side. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -104 = 31.75 mm, which is why this row sits beside, not on, the metric bore size. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units." }, { "q": "Can eccentric-collar bearings run in both directions?", "a": "They are intended for one predominant running direction; true reversing drives can unwind the eccentric. For bidirectional or vibrating shafts choose grub-screw or SKF ConCentra (YSP) locking." }, { "q": "How does the eccentric locking collar work?", "a": "The collar has an eccentric bore matching an eccentric on the inner ring extension. After sliding it on, turn it in the shaft's running direction until it grips, then tighten the collar's own set screw into its recess. Rotation then self-tightens rather than loosens the lock." } ], "cross_ref": [ { "equiv_sku": "YET", "equiv_brand": "ISO 15", "level": "full", "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YET-207-104", "YET 207-104" ], "locale_variants": {} }, { "sku": "YELAG-207-104", "brand": "SKF", "manufacturer_designation": "YELAG 207-104", "series": "YEL2-series", "type": "insert", "d_mm": 31.75, "D_mm": 72, "B_mm": 37.6, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 1100, "max_rpm": 1100, "weight_g": 600, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YELAG 207-104 is a eccentric-locking-collar insert bearing with the inner ring extended on both sides, 31.75x72x37.6 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction pairs capped deep-groove geometry with a one-piece eccentric locking collar and a convex outer ring — quick to mount on plain commercial shafts and tolerant of initial static misalignment. reading YEL: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended symmetrically both sides. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -104 = 31.75 mm, which is why this row sits beside, not on, the metric bore size. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery. Envelope 31.75x72x37.6 mm (1.25x2.835x1.48 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. Mounted width B1 51.1 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 1,100 r/min; mass 600 g. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 46.1 mm, d2 51.1 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the inner flinger. Fatigue-limit check: Pu 0.655 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YELAG 207-104 — most belt-driven mounted-unit loads sit comfortably under 2.569 % of C. Rating split for the maintenance file: dynamic 25.5 kN (L10), static 15.3 kN (s0 shock check), fatigue 0.655 kN (adjusted life) — three separate uses for YELAG 207-104, none interchangeable with another. The s1 32.3 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Envelope arithmetic: the radial section from 31.75 mm bore to 72 mm OD is 20.125 mm; dividing C 25.5 kN by that section gives 1.267 kN per section millimetre, and the 37.6 mm overall width is 1.868x the section. Collar geometry for this size: over the 19 mm outer-ring width the inner ring runs to 37.6 mm overall (51.1 mm including the eccentric collar width), giving the collar its eccentric seating face clear of the seal.", "applications": [ "ventilation equipment with frequent bearing changes", "one-direction conveyor drives", "tiller and cultivator rotors" ], "failure_modes": [ "burr or paint under the eccentric faces prevents full bite, leaving an eccentric preload that runs hot", "eccentric collar mounted against rotation direction works loose and spins, fretting the shaft", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "The eccentric collar is handed to running direction; fit it wrong on the 31.75 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Overall width 51.1 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "Catalogue ratings belong to YELAG 207-104 as the ecc two ag execution; other order numbers of the YELAG 207-104 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YELAG-207-104?", "a": "The catalogue envelope is 31.75x72x37.6 mm with a spherical outside surface; mass 600 g. Ratings C 25.5/15.3 kN, Pu 0.655 kN, limiting speed 1,100 r/min." }, { "q": "What does the designation YELAG 207-104 mean?", "a": "reading YEL: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended symmetrically both sides. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -104 = 31.75 mm, which is why this row sits beside, not on, the metric bore size. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery." }, { "q": "Why is the collar sometimes wider than the bearing (B1)?", "a": "The B1 dimension includes the eccentric collar's axial width, so the housing needs that extra space beside the bearing. Draw housings to B1, not B, when replacing a grub-screw unit with a collar unit." }, { "q": "What is the difference between YET and YEL?", "a": "YET has the inner ring extended on one side; YEL extends it on both sides. Both lock with the eccentric collar and share bore/OD geometry; the sealed -2F executions sit in the YEL listings." } ], "cross_ref": [ { "equiv_sku": "YEL-207-104-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 31.75x72x37.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 207-104-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YELAG-207-104", "YELAG 207-104" ], "locale_variants": {} }, { "sku": "YEL-207-104-2F", "brand": "SKF", "manufacturer_designation": "YEL 207-104-2F", "series": "YEL2-series", "type": "insert", "d_mm": 31.75, "D_mm": 72, "B_mm": 37.6, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 5300, "max_rpm": 5300, "weight_g": 610, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YEL 207-104-2F is a eccentric-locking-collar insert bearing with the inner ring extended on both sides, 31.75x72x37.6 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction pairs capped deep-groove geometry with a one-piece eccentric locking collar and a convex outer ring — quick to mount on plain commercial shafts and tolerant of initial static misalignment. reading YEL: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended symmetrically both sides. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -104 = 31.75 mm, which is why this row sits beside, not on, the metric bore size. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution. Envelope 31.75x72x37.6 mm (1.25x2.835x1.48 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. Mounted width B1 51.1 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 5,300 r/min; mass 610 g. Load balance for documentation: C0 15.3 kN against C 25.5 kN gives a 0.6 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Bore-to-OD planning: OD 72 over bore 31.75 is a 2.268x step, while bore/overall-width gives 0.844; the spherical seat in the matching Y-housing must be specified to the 72 mm OD, not to a cylindrical housing bore. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 46.1 mm, d2 51.1 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the plain flinger. Mass-to-load ratio for YEL-207-104-2F: 23.922 g of catalogue mass per rated kN of C, and 19.213 g per millimetre of bore — useful when comparing executions of the same 31.75x72 mm envelope on the drawing. Spherical-seat note in numbers: the 72 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 51.875 = 162.97 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Two-side sealed collar note: after driving the eccentric collar tight, lock the collar set screw against its recess and verify the collar cannot be turned by hand; a collar that was merely pressed on without the eccentric bite spins on the shaft and frets it within hours. Collar geometry for this size: over the 19 mm outer-ring width the inner ring runs to 37.6 mm overall (51.1 mm including the eccentric collar width), giving the collar its eccentric seating face clear of the seal.", "applications": [ "agricultural machinery PTO-driven shafts", "tiller and cultivator rotors", "ventilation equipment with frequent bearing changes" ], "failure_modes": [ "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "collar set screw not locked into its recess: the collar unwinds and the bearing walks off its seat", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "The eccentric collar is handed to running direction; fit it wrong on the 31.75 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Overall width 51.1 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "Ordering discipline for the 31.75 mm size: the chapter lists several executions side by side (YEL2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YEL-207-104-2F?", "a": "The catalogue envelope is 31.75x72x37.6 mm with a spherical outside surface; mass 610 g. Ratings C 25.5/15.3 kN, Pu 0.655 kN, limiting speed 5,300 r/min." }, { "q": "What does the designation YEL 207-104-2F mean?", "a": "reading YEL: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended symmetrically both sides. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -104 = 31.75 mm, which is why this row sits beside, not on, the metric bore size. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution." }, { "q": "How does the eccentric locking collar work?", "a": "The collar has an eccentric bore matching an eccentric on the inner ring extension. After sliding it on, turn it in the shaft's running direction until it grips, then tighten the collar's own set screw into its recess. Rotation then self-tightens rather than loosens the lock." }, { "q": "Why is the collar sometimes wider than the bearing (B1)?", "a": "The B1 dimension includes the eccentric collar's axial width, so the housing needs that extra space beside the bearing. Draw housings to B1, not B, when replacing a grub-screw unit with a collar unit." } ], "cross_ref": [ { "equiv_sku": "YELAG-207-104", "equiv_brand": "SKF", "level": "full", "note": "Same 31.75x72x37.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 207-104 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YEL-207-104-2F", "YEL 207-104-2F" ], "locale_variants": {} }, { "sku": "YET-207-105", "brand": "SKF", "manufacturer_designation": "YET 207-105", "series": "YEL2-series", "type": "insert", "d_mm": 33.3375, "D_mm": 72, "B_mm": 25.4, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 5300, "max_rpm": 5300, "weight_g": 490, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YET 207-105 is a eccentric-locking-collar insert bearing with a one-side-extended inner ring, 33.3375x72x25.4 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction pairs capped deep-groove geometry with a one-piece eccentric locking collar and a convex outer ring — quick to mount on plain commercial shafts and tolerant of initial static misalignment. reading YET: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended on one side. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -105 = 33.337 mm, which is why this row sits beside, not on, the metric bore size. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units. Envelope 33.3375x72x25.4 mm (1.313x2.835x1 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. Mounted width B1 38.9 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 5,300 r/min; mass 490 g. Envelope arithmetic: the radial section from 33.3375 mm bore to 72 mm OD is 19.331 mm; dividing C 25.5 kN by that section gives 1.319 kN per section millimetre, and the 25.4 mm overall width is 1.314x the section. Bore-to-OD planning: OD 72 over bore 33.3375 is a 2.16x step, while bore/overall-width gives 1.313; the spherical seat in the matching Y-housing must be specified to the 72 mm OD, not to a cylindrical housing bore. Outer-vs-overall width: the outer ring is 19 mm wide inside the 25.4 mm total, so the extended inner ring accounts for 0.252 of the overall width (6.4 mm of axial projection on the locking side). Spherical-seat note in numbers: the 72 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 52.669 = 165.465 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Fatigue-limit check: Pu 0.655 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YET 207-105 — most belt-driven mounted-unit loads sit comfortably under 2.569 % of C. One-side collar note: the eccentric collar mounts on the extended side only and must turn in the shaft rotation direction to self-tighten; on reversing drives this design can loosen by design intent — choose grub-screw or ConCentra locking for true bidirectional shafts. Collar geometry for this size: over the 19 mm outer-ring width the inner ring runs to 25.4 mm overall (38.9 mm including the eccentric collar width), giving the collar its eccentric seating face clear of the seal.", "applications": [ "tiller and cultivator rotors", "one-direction conveyor drives", "agricultural machinery PTO-driven shafts" ], "failure_modes": [ "collar set screw not locked into its recess: the collar unwinds and the bearing walks off its seat", "eccentric collar mounted against rotation direction works loose and spins, fretting the shaft", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "The eccentric collar is handed to running direction; fit it wrong on the 33.3375 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Overall width 38.9 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YET collar.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "Catalogue ratings belong to YET 207-105 as the ecc one open execution; other order numbers of the YET 207-105 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YET-207-105?", "a": "The catalogue envelope is 33.3375x72x25.4 mm with a spherical outside surface; mass 490 g. Ratings C 25.5/15.3 kN, Pu 0.655 kN, limiting speed 5,300 r/min." }, { "q": "What does the designation YET 207-105 mean?", "a": "reading YET: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended on one side. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -105 = 33.337 mm, which is why this row sits beside, not on, the metric bore size. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units." }, { "q": "How does the eccentric locking collar work?", "a": "The collar has an eccentric bore matching an eccentric on the inner ring extension. After sliding it on, turn it in the shaft's running direction until it grips, then tighten the collar's own set screw into its recess. Rotation then self-tightens rather than loosens the lock." }, { "q": "Why is the collar sometimes wider than the bearing (B1)?", "a": "The B1 dimension includes the eccentric collar's axial width, so the housing needs that extra space beside the bearing. Draw housings to B1, not B, when replacing a grub-screw unit with a collar unit." } ], "cross_ref": [ { "equiv_sku": "YET", "equiv_brand": "ISO 15", "level": "full", "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YET-207-105", "YET 207-105" ], "locale_variants": {} }, { "sku": "YET-207-106", "brand": "SKF", "manufacturer_designation": "YET 207-106", "series": "YEL2-series", "type": "insert", "d_mm": 34.925, "D_mm": 72, "B_mm": 25.4, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 5300, "max_rpm": 5300, "weight_g": 460, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YEL2 series order number YET 207-106 is a SKF insert bearing (Y-bearing) for a 34.925 mm (1.375 in) shaft: eccentric-locking-collar insert bearing with a one-side-extended inner ring, built to the ISO 15 diameter-series envelope with a sphered OD of 72 mm. Inside sits a sealed ball insert with an eccentric collar on the extended ring: collar bite locks the shaft, the contact seals retain the life grease, and the spherical OD floats in the Y-housing. YET means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on one side. inch bore code -106 decodes as 1\" +6/16, i.e. 34.925 mm; the metric coded size YET 207 shares the same envelope but its bore is the metric value, not this one. with no -2F/-2RF suffix the order number denotes the open external execution of the YEL2 size — add external exclusion at the housing and plan relubrication intervals for dusty or wet surroundings. Envelope 34.925x72x25.4 mm (1.375x2.835x1 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. Mounted width B1 38.9 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 5,300 r/min; mass 460 g. Outer-vs-overall width: the outer ring is 19 mm wide inside the 25.4 mm total, so the extended inner ring accounts for 0.252 of the overall width (6.4 mm of axial projection on the locking side). Rating split for the maintenance file: dynamic 25.5 kN (L10), static 15.3 kN (s0 shock check), fatigue 0.655 kN (adjusted life) — three separate uses for YET 207-106, none interchangeable with another. Speed ceiling of 5,300 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Imperial procurement cross-check: 1.375 in bore, 2.835 in OD, 1 in overall width; the 460 g mass converts to 0.460 kg (16.2 oz) for the bill of materials. Grease-life arithmetic is dominated by speed: at dn approx 2.83x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. One-side collar note: the eccentric collar mounts on the extended side only and must turn in the shaft rotation direction to self-tighten; on reversing drives this design can loosen by design intent — choose grub-screw or ConCentra locking for true bidirectional shafts. Collar geometry for this size: over the 19 mm outer-ring width the inner ring runs to 25.4 mm overall (38.9 mm including the eccentric collar width), giving the collar its eccentric seating face clear of the seal.", "applications": [ "one-direction conveyor drives", "agricultural machinery PTO-driven shafts", "ventilation equipment with frequent bearing changes" ], "failure_modes": [ "eccentric collar mounted against rotation direction works loose and spins, fretting the shaft", "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "Overall width 38.9 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YET collar.", "The eccentric collar is handed to running direction; fit it wrong on the 34.925 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Ordering discipline for the 34.925 mm size: the chapter lists several executions side by side (YEL2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YET-207-106?", "a": "Boundary dimensions: bore 34.925 mm, sphered OD 72 mm, overall width 25.4 mm (38.9 mm with the collar); weight 460 g. Loads: dynamic 25.5 kN, static 15.3 kN, fatigue 0.655 kN; the only published speed is the 5,300 r/min limiting value." }, { "q": "What does the designation YET 207-106 mean?", "a": "YET means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on one side. inch bore code -106 decodes as 1\" +6/16, i.e. 34.925 mm; the metric coded size YET 207 shares the same envelope but its bore is the metric value, not this one. with no -2F/-2RF suffix the order number denotes the open external execution of the YEL2 size — add external exclusion at the housing and plan relubrication intervals for dusty or wet surroundings." }, { "q": "Why is the collar sometimes wider than the bearing (B1)?", "a": "The B1 dimension includes the eccentric collar's axial width, so the housing needs that extra space beside the bearing. Draw housings to B1, not B, when replacing a grub-screw unit with a collar unit." }, { "q": "What is the difference between YET and YEL?", "a": "YET has the inner ring extended on one side; YEL extends it on both sides. Both lock with the eccentric collar and share bore/OD geometry; the sealed -2F executions sit in the YEL listings." } ], "cross_ref": [ { "equiv_sku": "YET-207", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x25.4 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YET 207 is the eccentric collar locking, one-side-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YET-207-VL065", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x25.4 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YET 207/VL065 is the eccentric collar locking, one-side-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YET-207-106", "YET 207-106" ], "locale_variants": {} }, { "sku": "YELAG-207-106", "brand": "SKF", "manufacturer_designation": "YELAG 207-106", "series": "YEL2-series", "type": "insert", "d_mm": 34.925, "D_mm": 72, "B_mm": 37.6, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 1100, "max_rpm": 1100, "weight_g": 540, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YEL2 series order number YELAG 207-106 is a SKF insert bearing (Y-bearing) for a 34.925 mm (1.375 in) shaft: eccentric-locking-collar insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 72 mm. Inside sits a sealed ball insert with an eccentric collar on the extended ring: collar bite locks the shaft, the contact seals retain the life grease, and the spherical OD floats in the Y-housing. YEL means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on both sides. inch bore code -106 decodes as 1\" +6/16, i.e. 34.925 mm; the metric coded size YELAG 207 shares the same envelope but its bore is the metric value, not this one. the AG suffix identifies the farm-duty variant of the range: sealed and flinger-protected for chaff and dust, with the catalogue deliberately derating its permissible speed versus the industrial execution. Envelope 34.925x72x37.6 mm (1.375x2.835x1.48 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. Mounted width B1 51.1 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 1,100 r/min; mass 540 g. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 46.1 mm, d2 51.1 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the inner flinger. Width accounting: B1 51.1 mm covers the bearing WITH its eccentric locking collar against 37.6 mm for the bearing itself and 19 mm outer-ring width; housing axial space is drawn to B1, seal replacement space to B. Speed ceiling of 1,100 r/min is the catalogue mechanical limit for THIS execution; the AG agricultural derate is deliberate, so real fan duty is planned well below it. Static-first planning: the 0.407 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 34.925 mm shaft, not the 25.5 kN L10 value. Selection figures for YELAG 207-106: C0/C is 0.6, Pu 0.655 kN is 2.569 % of the 25.5 kN dynamic rating, and the 540 g catalogue mass works out to roughly 15.462 g per millimetre of the 34.925 mm bore. Collar geometry for this size: over the 19 mm outer-ring width the inner ring runs to 37.6 mm overall (51.1 mm including the eccentric collar width), giving the collar its eccentric seating face clear of the seal.", "applications": [ "ventilation equipment with frequent bearing changes", "tiller and cultivator rotors", "one-direction conveyor drives" ], "failure_modes": [ "burr or paint under the eccentric faces prevents full bite, leaving an eccentric preload that runs hot", "collar set screw not locked into its recess: the collar unwinds and the bearing walks off its seat", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "The eccentric collar is handed to running direction; fit it wrong on the 34.925 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Overall width 51.1 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "Ordering discipline for the 34.925 mm size: the chapter lists several executions side by side (YEL2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YELAG-207-106?", "a": "Boundary dimensions: bore 34.925 mm, sphered OD 72 mm, overall width 37.6 mm (51.1 mm with the collar); weight 540 g. Loads: dynamic 25.5 kN, static 15.3 kN, fatigue 0.655 kN; the only published speed is the 1,100 r/min limiting value." }, { "q": "What does the designation YELAG 207-106 mean?", "a": "YEL means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on both sides. inch bore code -106 decodes as 1\" +6/16, i.e. 34.925 mm; the metric coded size YELAG 207 shares the same envelope but its bore is the metric value, not this one. the AG suffix identifies the farm-duty variant of the range: sealed and flinger-protected for chaff and dust, with the catalogue deliberately derating its permissible speed versus the industrial execution." }, { "q": "Can eccentric-collar bearings run in both directions?", "a": "They are intended for one predominant running direction; true reversing drives can unwind the eccentric. For bidirectional or vibrating shafts choose grub-screw or SKF ConCentra (YSP) locking." }, { "q": "How does the eccentric locking collar work?", "a": "The collar has an eccentric bore matching an eccentric on the inner ring extension. After sliding it on, turn it in the shaft's running direction until it grips, then tighten the collar's own set screw into its recess. Rotation then self-tightens rather than loosens the lock." } ], "cross_ref": [ { "equiv_sku": "YELAG-207", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x37.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 207 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YEL-207-2RF-VL065", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x37.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 207-2RF/VL065 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YEL-207-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x37.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 207-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YEL-207-106-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x37.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 207-106-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YELAG-207-106", "YELAG 207-106" ], "locale_variants": {} }, { "sku": "YEL-207-106-2F", "brand": "SKF", "manufacturer_designation": "YEL 207-106-2F", "series": "YEL2-series", "type": "insert", "d_mm": 34.925, "D_mm": 72, "B_mm": 37.6, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 5300, "max_rpm": 5300, "weight_g": 550, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YEL 207-106-2F is SKF's 34.925 mm-bore eccentric-locking-collar insert bearing with the inner ring extended on both sides in the YEL2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 34.925x72x37.6 mm. The deep-groove ball set is built into an extended inner ring carrying a separate eccentric locking collar; turning the collar against its eccentric seat pinches the shaft, and the sphered outer ring self-aligns in the housing. the YEL prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended both sides. the three-digit -106 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 6/16 in = 34.925 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 34.925x72x37.6 mm (1.375x2.835x1.48 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. Mounted width B1 51.1 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 5,300 r/min; mass 550 g. Spherical-seat note in numbers: the 72 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 53.462 = 167.956 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Imperial procurement cross-check: 1.375 in bore, 2.835 in OD, 1.48 in overall width; the 550 g mass converts to 0.550 kg (19.4 oz) for the bill of materials. Width accounting: B1 51.1 mm covers the bearing WITH its eccentric locking collar against 37.6 mm for the bearing itself and 19 mm outer-ring width; housing axial space is drawn to B1, seal replacement space to B. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 34.925x72 mm insert on its chamfer tilts the whole spherical seat. Mass-to-load ratio for YEL-207-106-2F: 21.569 g of catalogue mass per rated kN of C, and 15.748 g per millimetre of bore — useful when comparing executions of the same 34.925x72 mm envelope on the drawing. Two-side sealed collar note: after driving the eccentric collar tight, lock the collar set screw against its recess and verify the collar cannot be turned by hand; a collar that was merely pressed on without the eccentric bite spins on the shaft and frets it within hours. Collar geometry for this size: over the 19 mm outer-ring width the inner ring runs to 37.6 mm overall (51.1 mm including the eccentric collar width), giving the collar its eccentric seating face clear of the seal.", "applications": [ "agricultural machinery PTO-driven shafts", "ventilation equipment with frequent bearing changes", "tiller and cultivator rotors" ], "failure_modes": [ "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "burr or paint under the eccentric faces prevents full bite, leaving an eccentric preload that runs hot", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "Overall width 51.1 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "The eccentric collar is handed to running direction; fit it wrong on the 34.925 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Ordering discipline for the 34.925 mm size: the chapter lists several executions side by side (YEL2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YEL-207-106-2F?", "a": "YEL 207-106-2F measures 34.925 mm bore x 72 mm OD x 37.6 mm overall width (outer ring 19 mm wide), 1.375 x 2.835 x 1.48 in; mass about 550 g. SKF 17000 ratings: C 25.5 kN, C0 15.3 kN, Pu 0.655 kN, limiting speed 5,300 r/min." }, { "q": "What does the designation YEL 207-106-2F mean?", "a": "the YEL prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended both sides. the three-digit -106 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 6/16 in = 34.925 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "What is the difference between YET and YEL?", "a": "YET has the inner ring extended on one side; YEL extends it on both sides. Both lock with the eccentric collar and share bore/OD geometry; the sealed -2F executions sit in the YEL listings." }, { "q": "Can eccentric-collar bearings run in both directions?", "a": "They are intended for one predominant running direction; true reversing drives can unwind the eccentric. For bidirectional or vibrating shafts choose grub-screw or SKF ConCentra (YSP) locking." } ], "cross_ref": [ { "equiv_sku": "YELAG-207", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x37.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 207 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YEL-207-2RF-VL065", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x37.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 207-2RF/VL065 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YEL-207-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x37.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 207-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YELAG-207-106", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x37.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 207-106 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YEL-207-106-2F", "YEL 207-106-2F" ], "locale_variants": {} }, { "sku": "YET-207-107", "brand": "SKF", "manufacturer_designation": "YET 207-107", "series": "YEL2-series", "type": "insert", "d_mm": 36.512499999999996, "D_mm": 72, "B_mm": 25.4, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 5300, "max_rpm": 5300, "weight_g": 440, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YET 207-107 is SKF's 36.512499999999996 mm-bore eccentric-locking-collar insert bearing with a one-side-extended inner ring in the YEL2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 36.512499999999996x72x25.4 mm. The deep-groove ball set is built into an extended inner ring carrying a separate eccentric locking collar; turning the collar against its eccentric seat pinches the shaft, and the sphered outer ring self-aligns in the housing. the YET prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended one side. the three-digit -107 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 7/16 in = 36.512 mm (first digit whole inches, next two sixteenths of an inch). this suffix-free execution is listed without the sealed external design: the 25.4 mm width is the one-side-extended inner ring alone, so protection depends on the housing seals and the relubrication routine rather than bearing-mounted contact seals. Envelope 36.512499999999996x72x25.4 mm (1.438x2.835x1 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. Mounted width B1 38.9 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 5,300 r/min; mass 440 g. Grease-life arithmetic is dominated by speed: at dn approx 2.88x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Static-first planning: the 0.602 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 36.512499999999996 mm shaft, not the 25.5 kN L10 value. Envelope arithmetic: the radial section from 36.512499999999996 mm bore to 72 mm OD is 17.744 mm; dividing C 25.5 kN by that section gives 1.437 kN per section millimetre, and the 25.4 mm overall width is 1.431x the section. Load balance for documentation: C0 15.3 kN against C 25.5 kN gives a 0.6 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Bore-to-OD planning: OD 72 over bore 36.512499999999996 is a 1.972x step, while bore/overall-width gives 1.438; the spherical seat in the matching Y-housing must be specified to the 72 mm OD, not to a cylindrical housing bore. One-side collar note: the eccentric collar mounts on the extended side only and must turn in the shaft rotation direction to self-tighten; on reversing drives this design can loosen by design intent — choose grub-screw or ConCentra locking for true bidirectional shafts. Direction rule for YET-207-107: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 36.512499999999996 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "ventilation equipment with frequent bearing changes", "agricultural machinery PTO-driven shafts", "tiller and cultivator rotors" ], "failure_modes": [ "burr or paint under the eccentric faces prevents full bite, leaving an eccentric preload that runs hot", "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "The eccentric collar is handed to running direction; fit it wrong on the 36.512499999999996 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Overall width 38.9 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YET collar.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "Catalogue ratings belong to YET 207-107 as the ecc one open execution; other order numbers of the YET 207-107 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YET-207-107?", "a": "YET 207-107 measures 36.512499999999996 mm bore x 72 mm OD x 25.4 mm overall width (outer ring 19 mm wide), 1.438 x 2.835 x 1 in; mass about 440 g. SKF 17000 ratings: C 25.5 kN, C0 15.3 kN, Pu 0.655 kN, limiting speed 5,300 r/min." }, { "q": "What does the designation YET 207-107 mean?", "a": "the YET prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended one side. the three-digit -107 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 7/16 in = 36.512 mm (first digit whole inches, next two sixteenths of an inch). this suffix-free execution is listed without the sealed external design: the 25.4 mm width is the one-side-extended inner ring alone, so protection depends on the housing seals and the relubrication routine rather than bearing-mounted contact seals." }, { "q": "What is the difference between YET and YEL?", "a": "YET has the inner ring extended on one side; YEL extends it on both sides. Both lock with the eccentric collar and share bore/OD geometry; the sealed -2F executions sit in the YEL listings." }, { "q": "Can eccentric-collar bearings run in both directions?", "a": "They are intended for one predominant running direction; true reversing drives can unwind the eccentric. For bidirectional or vibrating shafts choose grub-screw or SKF ConCentra (YSP) locking." } ], "cross_ref": [ { "equiv_sku": "YET", "equiv_brand": "ISO 15", "level": "full", "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YET-207-107", "YET 207-107" ], "locale_variants": {} }, { "sku": "YELAG-207-107", "brand": "SKF", "manufacturer_designation": "YELAG 207-107", "series": "YEL2-series", "type": "insert", "d_mm": 36.512499999999996, "D_mm": 72, "B_mm": 37.6, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 1100, "max_rpm": 1100, "weight_g": 500, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YELAG 207-107 is SKF's 36.512499999999996 mm-bore eccentric-locking-collar insert bearing with the inner ring extended on both sides in the YEL2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 36.512499999999996x72x37.6 mm. The deep-groove ball set is built into an extended inner ring carrying a separate eccentric locking collar; turning the collar against its eccentric seat pinches the shaft, and the sphered outer ring self-aligns in the housing. the YEL prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended both sides. the three-digit -107 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 7/16 in = 36.512 mm (first digit whole inches, next two sixteenths of an inch). AG marks the agricultural-machinery application execution, built on the sealed both-sides-extended geometry and tuned for the low-speed, shock-laden duty of harvesters, balers and spreaders — note the catalogue prints a much reduced limiting speed for this variant. Envelope 36.512499999999996x72x37.6 mm (1.438x2.835x1.48 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. Mounted width B1 51.1 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 1,100 r/min; mass 500 g. Speed ceiling of 1,100 r/min is the catalogue mechanical limit for THIS execution; the AG agricultural derate is deliberate, so real fan duty is planned well below it. Pitch-diameter arithmetic: dm = (36.512499999999996+72)/2 = 54.256 mm; at the 1,100 r/min limiting speed the ball set runs at dn approx 0.60x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Mass-to-load ratio for YELAG-207-107: 19.608 g of catalogue mass per rated kN of C, and 13.694 g per millimetre of bore — useful when comparing executions of the same 36.512499999999996x72 mm envelope on the drawing. Static-first planning: the 0.407 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 36.512499999999996 mm shaft, not the 25.5 kN L10 value. Width accounting: B1 51.1 mm covers the bearing WITH its eccentric locking collar against 37.6 mm for the bearing itself and 19 mm outer-ring width; housing axial space is drawn to B1, seal replacement space to B. Direction rule for YELAG-207-107: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 36.512499999999996 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "one-direction conveyor drives", "tiller and cultivator rotors", "agricultural machinery PTO-driven shafts" ], "failure_modes": [ "eccentric collar mounted against rotation direction works loose and spins, fretting the shaft", "collar set screw not locked into its recess: the collar unwinds and the bearing walks off its seat", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "relubricated with incompatible grease that hardens the factory fill and drags the seals" ], "pitfalls": [ "Overall width 51.1 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "The eccentric collar is handed to running direction; fit it wrong on the 36.512499999999996 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "The 25.5/15.3 kN figures belong specifically to YELAG 207-107; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YELAG-207-107?", "a": "YELAG 207-107 measures 36.512499999999996 mm bore x 72 mm OD x 37.6 mm overall width (outer ring 19 mm wide), 1.438 x 2.835 x 1.48 in; mass about 500 g. SKF 17000 ratings: C 25.5 kN, C0 15.3 kN, Pu 0.655 kN, limiting speed 1,100 r/min." }, { "q": "What does the designation YELAG 207-107 mean?", "a": "the YEL prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended both sides. the three-digit -107 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 7/16 in = 36.512 mm (first digit whole inches, next two sixteenths of an inch). AG marks the agricultural-machinery application execution, built on the sealed both-sides-extended geometry and tuned for the low-speed, shock-laden duty of harvesters, balers and spreaders — note the catalogue prints a much reduced limiting speed for this variant." }, { "q": "How does the eccentric locking collar work?", "a": "The collar has an eccentric bore matching an eccentric on the inner ring extension. After sliding it on, turn it in the shaft's running direction until it grips, then tighten the collar's own set screw into its recess. Rotation then self-tightens rather than loosens the lock." }, { "q": "Why is the collar sometimes wider than the bearing (B1)?", "a": "The B1 dimension includes the eccentric collar's axial width, so the housing needs that extra space beside the bearing. Draw housings to B1, not B, when replacing a grub-screw unit with a collar unit." } ], "cross_ref": [ { "equiv_sku": "YEL-207-107-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 36.512499999999996x72x37.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 207-107-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YELAG-207-107", "YELAG 207-107" ], "locale_variants": {} }, { "sku": "YEL-207-107-2F", "brand": "SKF", "manufacturer_designation": "YEL 207-107-2F", "series": "YEL2-series", "type": "insert", "d_mm": 36.512499999999996, "D_mm": 72, "B_mm": 37.6, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 5300, "max_rpm": 5300, "weight_g": 510, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YEL 207-107-2F is a eccentric-locking-collar insert bearing with the inner ring extended on both sides, 36.512499999999996x72x37.6 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction pairs capped deep-groove geometry with a one-piece eccentric locking collar and a convex outer ring — quick to mount on plain commercial shafts and tolerant of initial static misalignment. reading YEL: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended symmetrically both sides. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -107 = 36.512 mm, which is why this row sits beside, not on, the metric bore size. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution. Envelope 36.512499999999996x72x37.6 mm (1.438x2.835x1.48 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. Mounted width B1 51.1 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 5,300 r/min; mass 510 g. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 36.512499999999996x72 mm insert on its chamfer tilts the whole spherical seat. At the printed limiting speed of 5,300 r/min the mean diameter dm = 54.256 mm implies dn about 2.88x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Imperial procurement cross-check: 1.438 in bore, 2.835 in OD, 1.48 in overall width; the 510 g mass converts to 0.510 kg (18.0 oz) for the bill of materials. Bore-to-OD planning: OD 72 over bore 36.512499999999996 is a 1.972x step, while bore/overall-width gives 0.971; the spherical seat in the matching Y-housing must be specified to the 72 mm OD, not to a cylindrical housing bore. Capacity density: 25.5 kN from 0.510 kg of bearing steel is about 50 kN per kilogram, and per width millimetre the 37.6 mm unit carries 0.678 kN of dynamic capacity. Two-side sealed collar note: after driving the eccentric collar tight, lock the collar set screw against its recess and verify the collar cannot be turned by hand; a collar that was merely pressed on without the eccentric bite spins on the shaft and frets it within hours. Direction rule for YEL-207-107-2F: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 36.512499999999996 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "tiller and cultivator rotors", "one-direction conveyor drives", "agricultural machinery PTO-driven shafts" ], "failure_modes": [ "collar set screw not locked into its recess: the collar unwinds and the bearing walks off its seat", "eccentric collar mounted against rotation direction works loose and spins, fretting the shaft", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "The eccentric collar is handed to running direction; fit it wrong on the 36.512499999999996 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "Overall width 51.1 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "Catalogue ratings belong to YEL 207-107-2F as the ecc two f execution; other order numbers of the YEL 207-107 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YEL-207-107-2F?", "a": "The catalogue envelope is 36.512499999999996x72x37.6 mm with a spherical outside surface; mass 510 g. Ratings C 25.5/15.3 kN, Pu 0.655 kN, limiting speed 5,300 r/min." }, { "q": "What does the designation YEL 207-107-2F mean?", "a": "reading YEL: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended symmetrically both sides. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -107 = 36.512 mm, which is why this row sits beside, not on, the metric bore size. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution." }, { "q": "Why is the collar sometimes wider than the bearing (B1)?", "a": "The B1 dimension includes the eccentric collar's axial width, so the housing needs that extra space beside the bearing. Draw housings to B1, not B, when replacing a grub-screw unit with a collar unit." }, { "q": "What is the difference between YET and YEL?", "a": "YET has the inner ring extended on one side; YEL extends it on both sides. Both lock with the eccentric collar and share bore/OD geometry; the sealed -2F executions sit in the YEL listings." } ], "cross_ref": [ { "equiv_sku": "YELAG-207-107", "equiv_brand": "SKF", "level": "full", "note": "Same 36.512499999999996x72x37.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 207-107 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YEL-207-107-2F", "YEL 207-107-2F" ], "locale_variants": {} }, { "sku": "YET-208-108", "brand": "SKF", "manufacturer_designation": "YET 208-108", "series": "YEL2-series", "type": "insert", "d_mm": 38.099999999999994, "D_mm": 80, "B_mm": 29.7, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 30.7, "static_load_kN": 19, "fatigue_load_limit_kN": 0.8, "limiting_speed_rpm": 4800, "max_rpm": 4800, "weight_g": 640, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YET 208-108 is a eccentric-locking-collar insert bearing with a one-side-extended inner ring, 38.099999999999994x80x29.7 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction pairs capped deep-groove geometry with a one-piece eccentric locking collar and a convex outer ring — quick to mount on plain commercial shafts and tolerant of initial static misalignment. reading YET: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended on one side. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -108 = 38.1 mm, which is why this row sits beside, not on, the metric bore size. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units. Envelope 38.099999999999994x80x29.7 mm (1.5x3.15x1.169 in), outer ring 21 mm wide, C 30.7 kN, C0 19 kN, Pu 0.8 kN. Mounted width B1 43.2 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 4,800 r/min; mass 640 g. Selection figures for YET 208-108: C0/C is 0.619, Pu 0.8 kN is 2.606 % of the 30.7 kN dynamic rating, and the 640 g catalogue mass works out to roughly 16.798 g per millimetre of the 38.099999999999994 mm bore. Load balance for documentation: C0 19 kN against C 30.7 kN gives a 0.619 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Imperial procurement cross-check: 1.5 in bore, 3.15 in OD, 1.169 in overall width; the 640 g mass converts to 0.640 kg (22.6 oz) for the bill of materials. Static-first planning: the 0.64 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 38.099999999999994 mm shaft, not the 30.7 kN L10 value. Grease-life arithmetic is dominated by speed: at dn approx 2.83x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. One-side collar note: the eccentric collar mounts on the extended side only and must turn in the shaft rotation direction to self-tighten; on reversing drives this design can loosen by design intent — choose grub-screw or ConCentra locking for true bidirectional shafts. Direction rule for YET-208-108: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 38.099999999999994 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "one-direction conveyor drives", "agricultural machinery PTO-driven shafts", "ventilation equipment with frequent bearing changes" ], "failure_modes": [ "eccentric collar mounted against rotation direction works loose and spins, fretting the shaft", "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "The eccentric collar is handed to running direction; fit it wrong on the 38.099999999999994 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Overall width 43.2 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YET collar.", "Ordering discipline for the 38.099999999999994 mm size: the chapter lists several executions side by side (YEL2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YET-208-108?", "a": "The catalogue envelope is 38.099999999999994x80x29.7 mm with a spherical outside surface; mass 640 g. Ratings C 30.7/19 kN, Pu 0.8 kN, limiting speed 4,800 r/min." }, { "q": "What does the designation YET 208-108 mean?", "a": "reading YET: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended on one side. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -108 = 38.1 mm, which is why this row sits beside, not on, the metric bore size. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units." }, { "q": "What is the difference between YET and YEL?", "a": "YET has the inner ring extended on one side; YEL extends it on both sides. Both lock with the eccentric collar and share bore/OD geometry; the sealed -2F executions sit in the YEL listings." }, { "q": "Can eccentric-collar bearings run in both directions?", "a": "They are intended for one predominant running direction; true reversing drives can unwind the eccentric. For bidirectional or vibrating shafts choose grub-screw or SKF ConCentra (YSP) locking." } ], "cross_ref": [ { "equiv_sku": "YET", "equiv_brand": "ISO 15", "level": "full", "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YET-208-108", "YET 208-108" ], "locale_variants": {} }, { "sku": "YELAG-208-108", "brand": "SKF", "manufacturer_designation": "YELAG 208-108", "series": "YEL2-series", "type": "insert", "d_mm": 38.099999999999994, "D_mm": 80, "B_mm": 42.8, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 30.7, "static_load_kN": 19, "fatigue_load_limit_kN": 0.8, "limiting_speed_rpm": 950, "max_rpm": 950, "weight_g": 740, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YELAG 208-108 is a eccentric-locking-collar insert bearing with the inner ring extended on both sides, 38.099999999999994x80x42.8 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction pairs capped deep-groove geometry with a one-piece eccentric locking collar and a convex outer ring — quick to mount on plain commercial shafts and tolerant of initial static misalignment. reading YEL: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended symmetrically both sides. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -108 = 38.1 mm, which is why this row sits beside, not on, the metric bore size. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery. Envelope 38.099999999999994x80x42.8 mm (1.5x3.15x1.685 in), outer ring 21 mm wide, C 30.7 kN, C0 19 kN, Pu 0.8 kN. Mounted width B1 56.3 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 950 r/min; mass 740 g. Envelope arithmetic: the radial section from 38.099999999999994 mm bore to 80 mm OD is 20.95 mm; dividing C 30.7 kN by that section gives 1.465 kN per section millimetre, and the 42.8 mm overall width is 2.043x the section. Bore-to-OD planning: OD 80 over bore 38.099999999999994 is a 2.1x step, while bore/overall-width gives 0.89; the spherical seat in the matching Y-housing must be specified to the 80 mm OD, not to a cylindrical housing bore. Outer-vs-overall width: the outer ring is 21 mm wide inside the 42.8 mm total, so the extended inner ring accounts for 0.509 of the overall width (10.9 mm of axial projection per side). Spherical-seat note in numbers: the 80 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 59.05 = 185.511 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Fatigue-limit check: Pu 0.8 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YELAG 208-108 — most belt-driven mounted-unit loads sit comfortably under 2.606 % of C. Collar geometry for this size: over the 21 mm outer-ring width the inner ring runs to 42.8 mm overall (56.3 mm including the eccentric collar width), giving the collar its eccentric seating face clear of the seal.", "applications": [ "tiller and cultivator rotors", "one-direction conveyor drives", "agricultural machinery PTO-driven shafts" ], "failure_modes": [ "collar set screw not locked into its recess: the collar unwinds and the bearing walks off its seat", "eccentric collar mounted against rotation direction works loose and spins, fretting the shaft", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "Overall width 56.3 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "The eccentric collar is handed to running direction; fit it wrong on the 38.099999999999994 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Ordering discipline for the 38.099999999999994 mm size: the chapter lists several executions side by side (YEL2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YELAG-208-108?", "a": "The catalogue envelope is 38.099999999999994x80x42.8 mm with a spherical outside surface; mass 740 g. Ratings C 30.7/19 kN, Pu 0.8 kN, limiting speed 950 r/min." }, { "q": "What does the designation YELAG 208-108 mean?", "a": "reading YEL: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended symmetrically both sides. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -108 = 38.1 mm, which is why this row sits beside, not on, the metric bore size. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery." }, { "q": "How does the eccentric locking collar work?", "a": "The collar has an eccentric bore matching an eccentric on the inner ring extension. After sliding it on, turn it in the shaft's running direction until it grips, then tighten the collar's own set screw into its recess. Rotation then self-tightens rather than loosens the lock." }, { "q": "Why is the collar sometimes wider than the bearing (B1)?", "a": "The B1 dimension includes the eccentric collar's axial width, so the housing needs that extra space beside the bearing. Draw housings to B1, not B, when replacing a grub-screw unit with a collar unit." } ], "cross_ref": [ { "equiv_sku": "YEL-208-108-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 38.099999999999994x80x42.8 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 208-108-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YSPAG-208-108", "equiv_brand": "SKF", "level": "full", "note": "Same 38.099999999999994x80x42.8 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSPAG 208-108 is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YSP-208-108-SB-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 38.099999999999994x80x42.8 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSP 208-108 SB-2F is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YELAG-208-108", "YELAG 208-108" ], "locale_variants": {} }, { "sku": "YEL-208-108-2F", "brand": "SKF", "manufacturer_designation": "YEL 208-108-2F", "series": "YEL2-series", "type": "insert", "d_mm": 38.099999999999994, "D_mm": 80, "B_mm": 42.8, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 30.7, "static_load_kN": 19, "fatigue_load_limit_kN": 0.8, "limiting_speed_rpm": 4800, "max_rpm": 4800, "weight_g": 760, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YEL 208-108-2F is SKF's 38.099999999999994 mm-bore eccentric-locking-collar insert bearing with the inner ring extended on both sides in the YEL2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 38.099999999999994x80x42.8 mm. The deep-groove ball set is built into an extended inner ring carrying a separate eccentric locking collar; turning the collar against its eccentric seat pinches the shaft, and the sphered outer ring self-aligns in the housing. the YEL prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended both sides. the three-digit -108 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 8/16 in = 38.1 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 38.099999999999994x80x42.8 mm (1.5x3.15x1.685 in), outer ring 21 mm wide, C 30.7 kN, C0 19 kN, Pu 0.8 kN. Mounted width B1 56.3 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 4,800 r/min; mass 760 g. Spherical-seat note in numbers: the 80 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 59.05 = 185.511 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 51.8 mm, d2 56.5 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the plain flinger. Bore-to-OD planning: OD 80 over bore 38.099999999999994 is a 2.1x step, while bore/overall-width gives 0.89; the spherical seat in the matching Y-housing must be specified to the 80 mm OD, not to a cylindrical housing bore. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 38.099999999999994x80 mm insert on its chamfer tilts the whole spherical seat. Speed ceiling of 4,800 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Two-side sealed collar note: after driving the eccentric collar tight, lock the collar set screw against its recess and verify the collar cannot be turned by hand; a collar that was merely pressed on without the eccentric bite spins on the shaft and frets it within hours. Direction rule for YEL-208-108-2F: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 38.099999999999994 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "agricultural machinery PTO-driven shafts", "one-direction conveyor drives", "ventilation equipment with frequent bearing changes" ], "failure_modes": [ "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "eccentric collar mounted against rotation direction works loose and spins, fretting the shaft", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "Overall width 56.3 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "The eccentric collar is handed to running direction; fit it wrong on the 38.099999999999994 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Ordering discipline for the 38.099999999999994 mm size: the chapter lists several executions side by side (YEL2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YEL-208-108-2F?", "a": "YEL 208-108-2F measures 38.099999999999994 mm bore x 80 mm OD x 42.8 mm overall width (outer ring 21 mm wide), 1.5 x 3.15 x 1.685 in; mass about 760 g. SKF 17000 ratings: C 30.7 kN, C0 19 kN, Pu 0.8 kN, limiting speed 4,800 r/min." }, { "q": "What does the designation YEL 208-108-2F mean?", "a": "the YEL prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended both sides. the three-digit -108 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 8/16 in = 38.1 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "Why is the collar sometimes wider than the bearing (B1)?", "a": "The B1 dimension includes the eccentric collar's axial width, so the housing needs that extra space beside the bearing. Draw housings to B1, not B, when replacing a grub-screw unit with a collar unit." }, { "q": "What is the difference between YET and YEL?", "a": "YET has the inner ring extended on one side; YEL extends it on both sides. Both lock with the eccentric collar and share bore/OD geometry; the sealed -2F executions sit in the YEL listings." } ], "cross_ref": [ { "equiv_sku": "YELAG-208-108", "equiv_brand": "SKF", "level": "full", "note": "Same 38.099999999999994x80x42.8 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 208-108 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YSPAG-208-108", "equiv_brand": "SKF", "level": "full", "note": "Same 38.099999999999994x80x42.8 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSPAG 208-108 is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YSP-208-108-SB-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 38.099999999999994x80x42.8 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSP 208-108 SB-2F is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YEL-208-108-2F", "YEL 208-108-2F" ], "locale_variants": {} }, { "sku": "YET-209-111", "brand": "SKF", "manufacturer_designation": "YET 209-111", "series": "YEL2-series", "type": "insert", "d_mm": 42.8625, "D_mm": 85, "B_mm": 30.2, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 33.2, "static_load_kN": 21.6, "fatigue_load_limit_kN": 0.915, "limiting_speed_rpm": 4300, "max_rpm": 4300, "weight_g": 730, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YET 209-111 is SKF's 42.8625 mm-bore eccentric-locking-collar insert bearing with a one-side-extended inner ring in the YEL2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 42.8625x85x30.2 mm. The deep-groove ball set is built into an extended inner ring carrying a separate eccentric locking collar; turning the collar against its eccentric seat pinches the shaft, and the sphered outer ring self-aligns in the housing. the YET prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended one side. the three-digit -111 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 11/16 in = 42.862 mm (first digit whole inches, next two sixteenths of an inch). this suffix-free execution is listed without the sealed external design: the 30.2 mm width is the one-side-extended inner ring alone, so protection depends on the housing seals and the relubrication routine rather than bearing-mounted contact seals. Envelope 42.8625x85x30.2 mm (1.688x3.346x1.189 in), outer ring 22 mm wide, C 33.2 kN, C0 21.6 kN, Pu 0.915 kN. Mounted width B1 43.7 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 4,300 r/min; mass 730 g. The s1 32.7 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Width accounting: B1 43.7 mm covers the bearing WITH its eccentric locking collar against 30.2 mm for the bearing itself and 22 mm outer-ring width; housing axial space is drawn to B1, seal replacement space to B. Bore-to-OD planning: OD 85 over bore 42.8625 is a 1.983x step, while bore/overall-width gives 1.419; the spherical seat in the matching Y-housing must be specified to the 85 mm OD, not to a cylindrical housing bore. Rating split for the maintenance file: dynamic 33.2 kN (L10), static 21.6 kN (s0 shock check), fatigue 0.915 kN (adjusted life) — three separate uses for YET 209-111, none interchangeable with another. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 42.8625x85 mm insert on its chamfer tilts the whole spherical seat. One-side collar note: the eccentric collar mounts on the extended side only and must turn in the shaft rotation direction to self-tighten; on reversing drives this design can loosen by design intent — choose grub-screw or ConCentra locking for true bidirectional shafts. Direction rule for YET-209-111: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 42.8625 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "agricultural machinery PTO-driven shafts", "ventilation equipment with frequent bearing changes", "tiller and cultivator rotors" ], "failure_modes": [ "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "burr or paint under the eccentric faces prevents full bite, leaving an eccentric preload that runs hot", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "The eccentric collar is handed to running direction; fit it wrong on the 42.8625 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Overall width 43.7 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YET collar.", "Ordering discipline for the 42.8625 mm size: the chapter lists several executions side by side (YEL2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YET-209-111?", "a": "YET 209-111 measures 42.8625 mm bore x 85 mm OD x 30.2 mm overall width (outer ring 22 mm wide), 1.688 x 3.346 x 1.189 in; mass about 730 g. SKF 17000 ratings: C 33.2 kN, C0 21.6 kN, Pu 0.915 kN, limiting speed 4,300 r/min." }, { "q": "What does the designation YET 209-111 mean?", "a": "the YET prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended one side. the three-digit -111 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 11/16 in = 42.862 mm (first digit whole inches, next two sixteenths of an inch). this suffix-free execution is listed without the sealed external design: the 30.2 mm width is the one-side-extended inner ring alone, so protection depends on the housing seals and the relubrication routine rather than bearing-mounted contact seals." }, { "q": "Can eccentric-collar bearings run in both directions?", "a": "They are intended for one predominant running direction; true reversing drives can unwind the eccentric. For bidirectional or vibrating shafts choose grub-screw or SKF ConCentra (YSP) locking." }, { "q": "How does the eccentric locking collar work?", "a": "The collar has an eccentric bore matching an eccentric on the inner ring extension. After sliding it on, turn it in the shaft's running direction until it grips, then tighten the collar's own set screw into its recess. Rotation then self-tightens rather than loosens the lock." } ], "cross_ref": [ { "equiv_sku": "YET", "equiv_brand": "ISO 15", "level": "full", "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YET-209-111", "YET 209-111" ], "locale_variants": {} }, { "sku": "YELAG-209-111", "brand": "SKF", "manufacturer_designation": "YELAG 209-111", "series": "YEL2-series", "type": "insert", "d_mm": 42.8625, "D_mm": 85, "B_mm": 42.8, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 33.2, "static_load_kN": 21.6, "fatigue_load_limit_kN": 0.915, "limiting_speed_rpm": 850, "max_rpm": 850, "weight_g": 840, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YELAG 209-111 is a eccentric-locking-collar insert bearing with the inner ring extended on both sides, 42.8625x85x42.8 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction pairs capped deep-groove geometry with a one-piece eccentric locking collar and a convex outer ring — quick to mount on plain commercial shafts and tolerant of initial static misalignment. reading YEL: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended symmetrically both sides. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -111 = 42.862 mm, which is why this row sits beside, not on, the metric bore size. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery. Envelope 42.8625x85x42.8 mm (1.688x3.346x1.685 in), outer ring 22 mm wide, C 33.2 kN, C0 21.6 kN, Pu 0.915 kN. Mounted width B1 56.3 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 850 r/min; mass 840 g. Mass-to-load ratio for YELAG-209-111: 25.301 g of catalogue mass per rated kN of C, and 19.598 g per millimetre of bore — useful when comparing executions of the same 42.8625x85 mm envelope on the drawing. Grease-life arithmetic is dominated by speed: at dn approx 0.54x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the AG variant caps speed so aggressively, and high-temperature mounts shorten both even when load is light. Load balance for documentation: C0 21.6 kN against C 33.2 kN gives a 0.651 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 42.8625x85 mm insert on its chamfer tilts the whole spherical seat. Capacity density: 33.2 kN from 0.840 kg of bearing steel is about 39.524 kN per kilogram, and per width millimetre the 42.8 mm unit carries 0.776 kN of dynamic capacity. Direction rule for YELAG-209-111: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 42.8625 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "tiller and cultivator rotors", "one-direction conveyor drives", "agricultural machinery PTO-driven shafts" ], "failure_modes": [ "collar set screw not locked into its recess: the collar unwinds and the bearing walks off its seat", "eccentric collar mounted against rotation direction works loose and spins, fretting the shaft", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "Overall width 56.3 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "The eccentric collar is handed to running direction; fit it wrong on the 42.8625 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Ordering discipline for the 42.8625 mm size: the chapter lists several executions side by side (YEL2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YELAG-209-111?", "a": "The catalogue envelope is 42.8625x85x42.8 mm with a spherical outside surface; mass 840 g. Ratings C 33.2/21.6 kN, Pu 0.915 kN, limiting speed 850 r/min." }, { "q": "What does the designation YELAG 209-111 mean?", "a": "reading YEL: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended symmetrically both sides. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -111 = 42.862 mm, which is why this row sits beside, not on, the metric bore size. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery." }, { "q": "Why is the collar sometimes wider than the bearing (B1)?", "a": "The B1 dimension includes the eccentric collar's axial width, so the housing needs that extra space beside the bearing. Draw housings to B1, not B, when replacing a grub-screw unit with a collar unit." }, { "q": "What is the difference between YET and YEL?", "a": "YET has the inner ring extended on one side; YEL extends it on both sides. Both lock with the eccentric collar and share bore/OD geometry; the sealed -2F executions sit in the YEL listings." } ], "cross_ref": [ { "equiv_sku": "YEL-209-111-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 42.8625x85x42.8 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 209-111-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YELAG-209-111", "YELAG 209-111" ], "locale_variants": {} }, { "sku": "YEL-209-111-2F", "brand": "SKF", "manufacturer_designation": "YEL 209-111-2F", "series": "YEL2-series", "type": "insert", "d_mm": 42.8625, "D_mm": 85, "B_mm": 42.8, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 33.2, "static_load_kN": 21.6, "fatigue_load_limit_kN": 0.915, "limiting_speed_rpm": 4300, "max_rpm": 4300, "weight_g": 860, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YEL 209-111-2F is SKF's 42.8625 mm-bore eccentric-locking-collar insert bearing with the inner ring extended on both sides in the YEL2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 42.8625x85x42.8 mm. The deep-groove ball set is built into an extended inner ring carrying a separate eccentric locking collar; turning the collar against its eccentric seat pinches the shaft, and the sphered outer ring self-aligns in the housing. the YEL prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended both sides. the three-digit -111 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 11/16 in = 42.862 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 42.8625x85x42.8 mm (1.688x3.346x1.685 in), outer ring 22 mm wide, C 33.2 kN, C0 21.6 kN, Pu 0.915 kN. Mounted width B1 56.3 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 4,300 r/min; mass 860 g. Capacity density: 33.2 kN from 0.860 kg of bearing steel is about 38.605 kN per kilogram, and per width millimetre the 42.8 mm unit carries 0.776 kN of dynamic capacity. Bore-to-OD planning: OD 85 over bore 42.8625 is a 1.983x step, while bore/overall-width gives 1.001; the spherical seat in the matching Y-housing must be specified to the 85 mm OD, not to a cylindrical housing bore. Envelope arithmetic: the radial section from 42.8625 mm bore to 85 mm OD is 21.069 mm; dividing C 33.2 kN by that section gives 1.576 kN per section millimetre, and the 42.8 mm overall width is 2.031x the section. Spherical-seat note in numbers: the 85 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 63.931 = 200.845 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Outer-vs-overall width: the outer ring is 22 mm wide inside the 42.8 mm total, so the extended inner ring accounts for 0.486 of the overall width (10.4 mm of axial projection per side). Two-side sealed collar note: after driving the eccentric collar tight, lock the collar set screw against its recess and verify the collar cannot be turned by hand; a collar that was merely pressed on without the eccentric bite spins on the shaft and frets it within hours. Direction rule for YEL-209-111-2F: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 42.8625 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "one-direction conveyor drives", "tiller and cultivator rotors", "agricultural machinery PTO-driven shafts" ], "failure_modes": [ "eccentric collar mounted against rotation direction works loose and spins, fretting the shaft", "collar set screw not locked into its recess: the collar unwinds and the bearing walks off its seat", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "The eccentric collar is handed to running direction; fit it wrong on the 42.8625 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Overall width 56.3 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "Catalogue ratings belong to YEL 209-111-2F as the ecc two f execution; other order numbers of the YEL 209-111 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YEL-209-111-2F?", "a": "YEL 209-111-2F measures 42.8625 mm bore x 85 mm OD x 42.8 mm overall width (outer ring 22 mm wide), 1.688 x 3.346 x 1.685 in; mass about 860 g. SKF 17000 ratings: C 33.2 kN, C0 21.6 kN, Pu 0.915 kN, limiting speed 4,300 r/min." }, { "q": "What does the designation YEL 209-111-2F mean?", "a": "the YEL prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended both sides. the three-digit -111 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 11/16 in = 42.862 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "How does the eccentric locking collar work?", "a": "The collar has an eccentric bore matching an eccentric on the inner ring extension. After sliding it on, turn it in the shaft's running direction until it grips, then tighten the collar's own set screw into its recess. Rotation then self-tightens rather than loosens the lock." }, { "q": "Why is the collar sometimes wider than the bearing (B1)?", "a": "The B1 dimension includes the eccentric collar's axial width, so the housing needs that extra space beside the bearing. Draw housings to B1, not B, when replacing a grub-screw unit with a collar unit." } ], "cross_ref": [ { "equiv_sku": "YELAG-209-111", "equiv_brand": "SKF", "level": "full", "note": "Same 42.8625x85x42.8 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 209-111 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YEL-209-111-2F", "YEL 209-111-2F" ], "locale_variants": {} }, { "sku": "YET-209-112", "brand": "SKF", "manufacturer_designation": "YET 209-112", "series": "YEL2-series", "type": "insert", "d_mm": 44.449999999999996, "D_mm": 85, "B_mm": 30.2, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 33.2, "static_load_kN": 21.6, "fatigue_load_limit_kN": 0.915, "limiting_speed_rpm": 4300, "max_rpm": 4300, "weight_g": 690, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YET 209-112 is SKF's 44.449999999999996 mm-bore eccentric-locking-collar insert bearing with a one-side-extended inner ring in the YEL2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 44.449999999999996x85x30.2 mm. The deep-groove ball set is built into an extended inner ring carrying a separate eccentric locking collar; turning the collar against its eccentric seat pinches the shaft, and the sphered outer ring self-aligns in the housing. the YET prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended one side. the three-digit -112 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 12/16 in = 44.45 mm (first digit whole inches, next two sixteenths of an inch). this suffix-free execution is listed without the sealed external design: the 30.2 mm width is the one-side-extended inner ring alone, so protection depends on the housing seals and the relubrication routine rather than bearing-mounted contact seals. Envelope 44.449999999999996x85x30.2 mm (1.75x3.346x1.189 in), outer ring 22 mm wide, C 33.2 kN, C0 21.6 kN, Pu 0.915 kN. Mounted width B1 43.7 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 4,300 r/min; mass 690 g. Pitch-diameter arithmetic: dm = (44.449999999999996+85)/2 = 64.725 mm; at the 4,300 r/min limiting speed the ball set runs at dn approx 2.78x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. The s1 32.7 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Rating split for the maintenance file: dynamic 33.2 kN (L10), static 21.6 kN (s0 shock check), fatigue 0.915 kN (adjusted life) — three separate uses for YET 209-112, none interchangeable with another. Envelope arithmetic: the radial section from 44.449999999999996 mm bore to 85 mm OD is 20.275 mm; dividing C 33.2 kN by that section gives 1.637 kN per section millimetre, and the 30.2 mm overall width is 1.49x the section. Mass-to-load ratio for YET-209-112: 20.783 g of catalogue mass per rated kN of C, and 15.523 g per millimetre of bore — useful when comparing executions of the same 44.449999999999996x85 mm envelope on the drawing. One-side collar note: the eccentric collar mounts on the extended side only and must turn in the shaft rotation direction to self-tighten; on reversing drives this design can loosen by design intent — choose grub-screw or ConCentra locking for true bidirectional shafts. Collar geometry for this size: over the 22 mm outer-ring width the inner ring runs to 30.2 mm overall (43.7 mm including the eccentric collar width), giving the collar its eccentric seating face clear of the seal.", "applications": [ "tiller and cultivator rotors", "agricultural machinery PTO-driven shafts", "one-direction conveyor drives" ], "failure_modes": [ "collar set screw not locked into its recess: the collar unwinds and the bearing walks off its seat", "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "Overall width 43.7 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YET collar.", "The eccentric collar is handed to running direction; fit it wrong on the 44.449999999999996 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Ordering discipline for the 44.449999999999996 mm size: the chapter lists several executions side by side (YEL2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YET-209-112?", "a": "YET 209-112 measures 44.449999999999996 mm bore x 85 mm OD x 30.2 mm overall width (outer ring 22 mm wide), 1.75 x 3.346 x 1.189 in; mass about 690 g. SKF 17000 ratings: C 33.2 kN, C0 21.6 kN, Pu 0.915 kN, limiting speed 4,300 r/min." }, { "q": "What does the designation YET 209-112 mean?", "a": "the YET prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended one side. the three-digit -112 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 12/16 in = 44.45 mm (first digit whole inches, next two sixteenths of an inch). this suffix-free execution is listed without the sealed external design: the 30.2 mm width is the one-side-extended inner ring alone, so protection depends on the housing seals and the relubrication routine rather than bearing-mounted contact seals." }, { "q": "What is the difference between YET and YEL?", "a": "YET has the inner ring extended on one side; YEL extends it on both sides. Both lock with the eccentric collar and share bore/OD geometry; the sealed -2F executions sit in the YEL listings." }, { "q": "Can eccentric-collar bearings run in both directions?", "a": "They are intended for one predominant running direction; true reversing drives can unwind the eccentric. For bidirectional or vibrating shafts choose grub-screw or SKF ConCentra (YSP) locking." } ], "cross_ref": [ { "equiv_sku": "YET", "equiv_brand": "ISO 15", "level": "full", "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YET-209-112", "YET 209-112" ], "locale_variants": {} }, { "sku": "YELAG-209-112", "brand": "SKF", "manufacturer_designation": "YELAG 209-112", "series": "YEL2-series", "type": "insert", "d_mm": 44.449999999999996, "D_mm": 85, "B_mm": 42.8, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 33.2, "static_load_kN": 21.6, "fatigue_load_limit_kN": 0.915, "limiting_speed_rpm": 850, "max_rpm": 850, "weight_g": 800, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YELAG 209-112 is a eccentric-locking-collar insert bearing with the inner ring extended on both sides, 44.449999999999996x85x42.8 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction pairs capped deep-groove geometry with a one-piece eccentric locking collar and a convex outer ring — quick to mount on plain commercial shafts and tolerant of initial static misalignment. reading YEL: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended symmetrically both sides. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -112 = 44.45 mm, which is why this row sits beside, not on, the metric bore size. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery. Envelope 44.449999999999996x85x42.8 mm (1.75x3.346x1.685 in), outer ring 22 mm wide, C 33.2 kN, C0 21.6 kN, Pu 0.915 kN. Mounted width B1 56.3 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 850 r/min; mass 800 g. Imperial procurement cross-check: 1.75 in bore, 3.346 in OD, 1.685 in overall width; the 800 g mass converts to 0.800 kg (28.2 oz) for the bill of materials. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 44.449999999999996x85 mm insert on its chamfer tilts the whole spherical seat. Fatigue-limit check: Pu 0.915 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YELAG 209-112 — most belt-driven mounted-unit loads sit comfortably under 2.756 % of C. Static-first planning: the 0.505 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 44.449999999999996 mm shaft, not the 33.2 kN L10 value. Grease-life arithmetic is dominated by speed: at dn approx 0.55x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the AG variant caps speed so aggressively, and high-temperature mounts shorten both even when load is light. Collar geometry for this size: over the 22 mm outer-ring width the inner ring runs to 42.8 mm overall (56.3 mm including the eccentric collar width), giving the collar its eccentric seating face clear of the seal.", "applications": [ "agricultural machinery PTO-driven shafts", "tiller and cultivator rotors", "ventilation equipment with frequent bearing changes" ], "failure_modes": [ "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "collar set screw not locked into its recess: the collar unwinds and the bearing walks off its seat", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "Overall width 56.3 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "The eccentric collar is handed to running direction; fit it wrong on the 44.449999999999996 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "The 33.2/21.6 kN figures belong specifically to YELAG 209-112; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YELAG-209-112?", "a": "The catalogue envelope is 44.449999999999996x85x42.8 mm with a spherical outside surface; mass 800 g. Ratings C 33.2/21.6 kN, Pu 0.915 kN, limiting speed 850 r/min." }, { "q": "What does the designation YELAG 209-112 mean?", "a": "reading YEL: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended symmetrically both sides. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -112 = 44.45 mm, which is why this row sits beside, not on, the metric bore size. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery." }, { "q": "How does the eccentric locking collar work?", "a": "The collar has an eccentric bore matching an eccentric on the inner ring extension. After sliding it on, turn it in the shaft's running direction until it grips, then tighten the collar's own set screw into its recess. Rotation then self-tightens rather than loosens the lock." }, { "q": "Why is the collar sometimes wider than the bearing (B1)?", "a": "The B1 dimension includes the eccentric collar's axial width, so the housing needs that extra space beside the bearing. Draw housings to B1, not B, when replacing a grub-screw unit with a collar unit." } ], "cross_ref": [ { "equiv_sku": "YEL-209-112-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 44.449999999999996x85x42.8 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 209-112-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YELAG-209-112", "YELAG 209-112" ], "locale_variants": {} }, { "sku": "YEL-209-112-2F", "brand": "SKF", "manufacturer_designation": "YEL 209-112-2F", "series": "YEL2-series", "type": "insert", "d_mm": 44.449999999999996, "D_mm": 85, "B_mm": 42.8, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 33.2, "static_load_kN": 21.6, "fatigue_load_limit_kN": 0.915, "limiting_speed_rpm": 4300, "max_rpm": 4300, "weight_g": 810, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YEL 209-112-2F is a eccentric-locking-collar insert bearing with the inner ring extended on both sides, 44.449999999999996x85x42.8 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction pairs capped deep-groove geometry with a one-piece eccentric locking collar and a convex outer ring — quick to mount on plain commercial shafts and tolerant of initial static misalignment. reading YEL: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended symmetrically both sides. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -112 = 44.45 mm, which is why this row sits beside, not on, the metric bore size. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution. Envelope 44.449999999999996x85x42.8 mm (1.75x3.346x1.685 in), outer ring 22 mm wide, C 33.2 kN, C0 21.6 kN, Pu 0.915 kN. Mounted width B1 56.3 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 4,300 r/min; mass 810 g. Rating split for the maintenance file: dynamic 33.2 kN (L10), static 21.6 kN (s0 shock check), fatigue 0.915 kN (adjusted life) — three separate uses for YEL 209-112-2F, none interchangeable with another. At the printed limiting speed of 4,300 r/min the mean diameter dm = 64.725 mm implies dn about 2.78x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. The s1 34.9 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Pitch-diameter arithmetic: dm = (44.449999999999996+85)/2 = 64.725 mm; at the 4,300 r/min limiting speed the ball set runs at dn approx 2.78x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Width accounting: B1 56.3 mm covers the bearing WITH its eccentric locking collar against 42.8 mm for the bearing itself and 22 mm outer-ring width; housing axial space is drawn to B1, seal replacement space to B. Two-side sealed collar note: after driving the eccentric collar tight, lock the collar set screw against its recess and verify the collar cannot be turned by hand; a collar that was merely pressed on without the eccentric bite spins on the shaft and frets it within hours. Collar geometry for this size: over the 22 mm outer-ring width the inner ring runs to 42.8 mm overall (56.3 mm including the eccentric collar width), giving the collar its eccentric seating face clear of the seal.", "applications": [ "ventilation equipment with frequent bearing changes", "one-direction conveyor drives", "tiller and cultivator rotors" ], "failure_modes": [ "burr or paint under the eccentric faces prevents full bite, leaving an eccentric preload that runs hot", "eccentric collar mounted against rotation direction works loose and spins, fretting the shaft", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "The eccentric collar is handed to running direction; fit it wrong on the 44.449999999999996 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Overall width 56.3 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "Ordering discipline for the 44.449999999999996 mm size: the chapter lists several executions side by side (YEL2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YEL-209-112-2F?", "a": "The catalogue envelope is 44.449999999999996x85x42.8 mm with a spherical outside surface; mass 810 g. Ratings C 33.2/21.6 kN, Pu 0.915 kN, limiting speed 4,300 r/min." }, { "q": "What does the designation YEL 209-112-2F mean?", "a": "reading YEL: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended symmetrically both sides. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -112 = 44.45 mm, which is why this row sits beside, not on, the metric bore size. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution." }, { "q": "Why is the collar sometimes wider than the bearing (B1)?", "a": "The B1 dimension includes the eccentric collar's axial width, so the housing needs that extra space beside the bearing. Draw housings to B1, not B, when replacing a grub-screw unit with a collar unit." }, { "q": "What is the difference between YET and YEL?", "a": "YET has the inner ring extended on one side; YEL extends it on both sides. Both lock with the eccentric collar and share bore/OD geometry; the sealed -2F executions sit in the YEL listings." } ], "cross_ref": [ { "equiv_sku": "YELAG-209-112", "equiv_brand": "SKF", "level": "full", "note": "Same 44.449999999999996x85x42.8 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 209-112 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YEL-209-112-2F", "YEL 209-112-2F" ], "locale_variants": {} }, { "sku": "YELAG-210-115", "brand": "SKF", "manufacturer_designation": "YELAG 210-115", "series": "YEL2-series", "type": "insert", "d_mm": 49.2125, "D_mm": 90, "B_mm": 49.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 35.1, "static_load_kN": 23.2, "fatigue_load_limit_kN": 0.98, "limiting_speed_rpm": 800, "max_rpm": 800, "weight_g": 940, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YEL2 series order number YELAG 210-115 is a SKF insert bearing (Y-bearing) for a 49.2125 mm (1.938 in) shaft: eccentric-locking-collar insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 90 mm. Inside sits a sealed ball insert with an eccentric collar on the extended ring: collar bite locks the shaft, the contact seals retain the life grease, and the spherical OD floats in the Y-housing. YEL means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on both sides. inch bore code -115 decodes as 1\" +15/16, i.e. 49.212 mm; the metric coded size YELAG 210 shares the same envelope but its bore is the metric value, not this one. the AG suffix identifies the farm-duty variant of the range: sealed and flinger-protected for chaff and dust, with the catalogue deliberately derating its permissible speed versus the industrial execution. Envelope 49.2125x90x49.2 mm (1.938x3.543x1.937 in), outer ring 22 mm wide, C 35.1 kN, C0 23.2 kN, Pu 0.98 kN. Mounted width B1 62.7 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 800 r/min; mass 940 g. Bore-to-OD planning: OD 90 over bore 49.2125 is a 1.829x step, while bore/overall-width gives 1; the spherical seat in the matching Y-housing must be specified to the 90 mm OD, not to a cylindrical housing bore. Speed ceiling of 800 r/min is the catalogue mechanical limit for THIS execution; the AG agricultural derate is deliberate, so real fan duty is planned well below it. Pitch-diameter arithmetic: dm = (49.2125+90)/2 = 69.606 mm; at the 800 r/min limiting speed the ball set runs at dn approx 0.56x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Fatigue-limit check: Pu 0.98 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YELAG 210-115 — most belt-driven mounted-unit loads sit comfortably under 2.792 % of C. Mass-to-load ratio for YELAG-210-115: 26.781 g of catalogue mass per rated kN of C, and 19.101 g per millimetre of bore — useful when comparing executions of the same 49.2125x90 mm envelope on the drawing. Direction rule for YELAG-210-115: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 49.2125 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "tiller and cultivator rotors", "ventilation equipment with frequent bearing changes", "one-direction conveyor drives" ], "failure_modes": [ "collar set screw not locked into its recess: the collar unwinds and the bearing walks off its seat", "burr or paint under the eccentric faces prevents full bite, leaving an eccentric preload that runs hot", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "Overall width 62.7 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "The eccentric collar is handed to running direction; fit it wrong on the 49.2125 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "The 35.1/23.2 kN figures belong specifically to YELAG 210-115; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YELAG-210-115?", "a": "Boundary dimensions: bore 49.2125 mm, sphered OD 90 mm, overall width 49.2 mm (62.7 mm with the collar); weight 940 g. Loads: dynamic 35.1 kN, static 23.2 kN, fatigue 0.98 kN; the only published speed is the 800 r/min limiting value." }, { "q": "What does the designation YELAG 210-115 mean?", "a": "YEL means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on both sides. inch bore code -115 decodes as 1\" +15/16, i.e. 49.212 mm; the metric coded size YELAG 210 shares the same envelope but its bore is the metric value, not this one. the AG suffix identifies the farm-duty variant of the range: sealed and flinger-protected for chaff and dust, with the catalogue deliberately derating its permissible speed versus the industrial execution." }, { "q": "Can eccentric-collar bearings run in both directions?", "a": "They are intended for one predominant running direction; true reversing drives can unwind the eccentric. For bidirectional or vibrating shafts choose grub-screw or SKF ConCentra (YSP) locking." }, { "q": "How does the eccentric locking collar work?", "a": "The collar has an eccentric bore matching an eccentric on the inner ring extension. After sliding it on, turn it in the shaft's running direction until it grips, then tighten the collar's own set screw into its recess. Rotation then self-tightens rather than loosens the lock." } ], "cross_ref": [ { "equiv_sku": "YEL-210-115-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 49.2125x90x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 210-115-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YELAG-210-115", "YELAG 210-115" ], "locale_variants": {} }, { "sku": "YEL-210-115-2F", "brand": "SKF", "manufacturer_designation": "YEL 210-115-2F", "series": "YEL2-series", "type": "insert", "d_mm": 49.2125, "D_mm": 90, "B_mm": 49.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 35.1, "static_load_kN": 23.2, "fatigue_load_limit_kN": 0.98, "limiting_speed_rpm": 4000, "max_rpm": 4000, "weight_g": 950, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YEL2 series order number YEL 210-115-2F is a SKF insert bearing (Y-bearing) for a 49.2125 mm (1.938 in) shaft: eccentric-locking-collar insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 90 mm. Inside sits a sealed ball insert with an eccentric collar on the extended ring: collar bite locks the shaft, the contact seals retain the life grease, and the spherical OD floats in the Y-housing. YEL means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on both sides. inch bore code -115 decodes as 1\" +15/16, i.e. 49.212 mm; the metric coded size YEL 210 shares the same envelope but its bore is the metric value, not this one. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 49.2125x90x49.2 mm (1.938x3.543x1.937 in), outer ring 22 mm wide, C 35.1 kN, C0 23.2 kN, Pu 0.98 kN. Mounted width B1 62.7 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 4,000 r/min; mass 950 g. Pitch-diameter arithmetic: dm = (49.2125+90)/2 = 69.606 mm; at the 4,000 r/min limiting speed the ball set runs at dn approx 2.78x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. The s1 38.1 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Fatigue-limit check: Pu 0.98 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YEL 210-115-2F — most belt-driven mounted-unit loads sit comfortably under 2.792 % of C. Envelope arithmetic: the radial section from 49.2125 mm bore to 90 mm OD is 20.394 mm; dividing C 35.1 kN by that section gives 1.721 kN per section millimetre, and the 49.2 mm overall width is 2.413x the section. Outer-vs-overall width: the outer ring is 22 mm wide inside the 49.2 mm total, so the extended inner ring accounts for 0.553 of the overall width (13.6 mm of axial projection per side). Two-side sealed collar note: after driving the eccentric collar tight, lock the collar set screw against its recess and verify the collar cannot be turned by hand; a collar that was merely pressed on without the eccentric bite spins on the shaft and frets it within hours. Collar geometry for this size: over the 22 mm outer-ring width the inner ring runs to 49.2 mm overall (62.7 mm including the eccentric collar width), giving the collar its eccentric seating face clear of the seal.", "applications": [ "tiller and cultivator rotors", "agricultural machinery PTO-driven shafts", "one-direction conveyor drives" ], "failure_modes": [ "collar set screw not locked into its recess: the collar unwinds and the bearing walks off its seat", "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "relubricated with incompatible grease that hardens the factory fill and drags the seals" ], "pitfalls": [ "Overall width 62.7 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "The eccentric collar is handed to running direction; fit it wrong on the 49.2125 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "The 35.1/23.2 kN figures belong specifically to YEL 210-115-2F; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YEL-210-115-2F?", "a": "Boundary dimensions: bore 49.2125 mm, sphered OD 90 mm, overall width 49.2 mm (62.7 mm with the collar); weight 950 g. Loads: dynamic 35.1 kN, static 23.2 kN, fatigue 0.98 kN; the only published speed is the 4,000 r/min limiting value." }, { "q": "What does the designation YEL 210-115-2F mean?", "a": "YEL means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on both sides. inch bore code -115 decodes as 1\" +15/16, i.e. 49.212 mm; the metric coded size YEL 210 shares the same envelope but its bore is the metric value, not this one. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "What is the difference between YET and YEL?", "a": "YET has the inner ring extended on one side; YEL extends it on both sides. Both lock with the eccentric collar and share bore/OD geometry; the sealed -2F executions sit in the YEL listings." }, { "q": "Can eccentric-collar bearings run in both directions?", "a": "They are intended for one predominant running direction; true reversing drives can unwind the eccentric. For bidirectional or vibrating shafts choose grub-screw or SKF ConCentra (YSP) locking." } ], "cross_ref": [ { "equiv_sku": "YELAG-210-115", "equiv_brand": "SKF", "level": "full", "note": "Same 49.2125x90x49.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 210-115 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YEL-210-115-2F", "YEL 210-115-2F" ], "locale_variants": {} }, { "sku": "YEL-211-200-2F", "brand": "SKF", "manufacturer_designation": "YEL 211-200-2F", "series": "YEL2-series", "type": "insert", "d_mm": 50.8, "D_mm": 100, "B_mm": 55.6, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 43.6, "static_load_kN": 29, "fatigue_load_limit_kN": 1.25, "limiting_speed_rpm": 3600, "max_rpm": 3600, "weight_g": 1500, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YEL2 series order number YEL 211-200-2F is a SKF insert bearing (Y-bearing) for a 50.8 mm (2 in) shaft: eccentric-locking-collar insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 100 mm. Inside sits a sealed ball insert with an eccentric collar on the extended ring: collar bite locks the shaft, the contact seals retain the life grease, and the spherical OD floats in the Y-housing. YEL means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on both sides. inch bore code -200 decodes as 2\", i.e. 50.8 mm; the metric coded size YEL 211 shares the same envelope but its bore is the metric value, not this one. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 50.8x100x55.6 mm (2x3.937x2.189 in), outer ring 25 mm wide, C 43.6 kN, C0 29 kN, Pu 1.25 kN. Mounted width B1 71.4 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 3,600 r/min; mass 1500 g. Static-first planning: the 0.522 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 50.8 mm shaft, not the 43.6 kN L10 value. The s1 43.6 mm dimension is printed for the locking zone — the set-screw/collar seating reference — and it is verified at mounting, not recoverable from d/D/B alone. Selection figures for YEL 211-200-2F: C0/C is 0.665, Pu 1.25 kN is 2.867 % of the 43.6 kN dynamic rating, and the 1500 g catalogue mass works out to roughly 29.528 g per millimetre of the 50.8 mm bore. Envelope arithmetic: the radial section from 50.8 mm bore to 100 mm OD is 24.6 mm; dividing C 43.6 kN by that section gives 1.772 kN per section millimetre, and the 55.6 mm overall width is 2.26x the section. Bore-to-OD planning: OD 100 over bore 50.8 is a 1.969x step, while bore/overall-width gives 0.914; the spherical seat in the matching Y-housing must be specified to the 100 mm OD, not to a cylindrical housing bore. Two-side sealed collar note: after driving the eccentric collar tight, lock the collar set screw against its recess and verify the collar cannot be turned by hand; a collar that was merely pressed on without the eccentric bite spins on the shaft and frets it within hours. Collar geometry for this size: over the 25 mm outer-ring width the inner ring runs to 55.6 mm overall (71.4 mm including the eccentric collar width), giving the collar its eccentric seating face clear of the seal.", "applications": [ "agricultural machinery PTO-driven shafts", "ventilation equipment with frequent bearing changes", "tiller and cultivator rotors" ], "failure_modes": [ "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "burr or paint under the eccentric faces prevents full bite, leaving an eccentric preload that runs hot", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "Overall width 71.4 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "The eccentric collar is handed to running direction; fit it wrong on the 50.8 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Ordering discipline for the 50.8 mm size: the chapter lists several executions side by side (YEL2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YEL-211-200-2F?", "a": "Boundary dimensions: bore 50.8 mm, sphered OD 100 mm, overall width 55.6 mm (71.4 mm with the collar); weight 1500 g. Loads: dynamic 43.6 kN, static 29 kN, fatigue 1.25 kN; the only published speed is the 3,600 r/min limiting value." }, { "q": "What does the designation YEL 211-200-2F mean?", "a": "YEL means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on both sides. inch bore code -200 decodes as 2\", i.e. 50.8 mm; the metric coded size YEL 211 shares the same envelope but its bore is the metric value, not this one. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "What is the difference between YET and YEL?", "a": "YET has the inner ring extended on one side; YEL extends it on both sides. Both lock with the eccentric collar and share bore/OD geometry; the sealed -2F executions sit in the YEL listings." }, { "q": "Can eccentric-collar bearings run in both directions?", "a": "They are intended for one predominant running direction; true reversing drives can unwind the eccentric. For bidirectional or vibrating shafts choose grub-screw or SKF ConCentra (YSP) locking." } ], "cross_ref": [ { "equiv_sku": "YAR-211-200-2RF", "equiv_brand": "SKF", "level": "full", "note": "Same 50.8x100x55.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 211-200-2RF is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YAR-211-200-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 50.8x100x55.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 211-200-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YEL-211-200-2F", "YEL 211-200-2F" ], "locale_variants": {} }, { "sku": "YEL-211-203-2F", "brand": "SKF", "manufacturer_designation": "YEL 211-203-2F", "series": "YEL2-series", "type": "insert", "d_mm": 55.5625, "D_mm": 100, "B_mm": 55.6, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 43.6, "static_load_kN": 29, "fatigue_load_limit_kN": 1.25, "limiting_speed_rpm": 3600, "max_rpm": 3600, "weight_g": 1250, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YEL2 series order number YEL 211-203-2F is a SKF insert bearing (Y-bearing) for a 55.5625 mm (2.188 in) shaft: eccentric-locking-collar insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 100 mm. Inside sits a sealed ball insert with an eccentric collar on the extended ring: collar bite locks the shaft, the contact seals retain the life grease, and the spherical OD floats in the Y-housing. YEL means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on both sides. inch bore code -203 decodes as 2\" +3/16, i.e. 55.563 mm; the metric coded size YEL 211 shares the same envelope but its bore is the metric value, not this one. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 55.5625x100x55.6 mm (2.188x3.937x2.189 in), outer ring 25 mm wide, C 43.6 kN, C0 29 kN, Pu 1.25 kN. Mounted width B1 71.4 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 3,600 r/min; mass 1250 g. Spherical-seat note in numbers: the 100 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 77.781 = 244.356 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Outer-vs-overall width: the outer ring is 25 mm wide inside the 55.6 mm total, so the extended inner ring accounts for 0.55 of the overall width (15.3 mm of axial projection per side). Imperial procurement cross-check: 2.188 in bore, 3.937 in OD, 2.189 in overall width; the 1250 g mass converts to 1.250 kg (44.1 oz) for the bill of materials. Pitch-diameter arithmetic: dm = (55.5625+100)/2 = 77.781 mm; at the 3,600 r/min limiting speed the ball set runs at dn approx 2.80x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. At the printed limiting speed of 3,600 r/min the mean diameter dm = 77.781 mm implies dn about 2.80x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Two-side sealed collar note: after driving the eccentric collar tight, lock the collar set screw against its recess and verify the collar cannot be turned by hand; a collar that was merely pressed on without the eccentric bite spins on the shaft and frets it within hours. Direction rule for YEL-211-203-2F: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 55.5625 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "heavy agricultural and harvesting equipment", "one-direction bulk conveyor shafts", "forestry and chipper drives" ], "failure_modes": [ "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "burr or paint under the eccentric faces prevents full bite, leaving an eccentric preload that runs hot", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "The eccentric collar is handed to running direction; fit it wrong on the 55.5625 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Overall width 71.4 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "Ordering discipline for the 55.5625 mm size: the chapter lists several executions side by side (YEL2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YEL-211-203-2F?", "a": "Boundary dimensions: bore 55.5625 mm, sphered OD 100 mm, overall width 55.6 mm (71.4 mm with the collar); weight 1250 g. Loads: dynamic 43.6 kN, static 29 kN, fatigue 1.25 kN; the only published speed is the 3,600 r/min limiting value." }, { "q": "What does the designation YEL 211-203-2F mean?", "a": "YEL means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on both sides. inch bore code -203 decodes as 2\" +3/16, i.e. 55.563 mm; the metric coded size YEL 211 shares the same envelope but its bore is the metric value, not this one. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "Can eccentric-collar bearings run in both directions?", "a": "They are intended for one predominant running direction; true reversing drives can unwind the eccentric. For bidirectional or vibrating shafts choose grub-screw or SKF ConCentra (YSP) locking." }, { "q": "How does the eccentric locking collar work?", "a": "The collar has an eccentric bore matching an eccentric on the inner ring extension. After sliding it on, turn it in the shaft's running direction until it grips, then tighten the collar's own set screw into its recess. Rotation then self-tightens rather than loosens the lock." } ], "cross_ref": [ { "equiv_sku": "YAR-211-203-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 55.5625x100x55.6 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YAR 211-203-2F is the grub-screw locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YEL-211-203-2F", "YEL 211-203-2F" ], "locale_variants": {} }, { "sku": "YET-212-207", "brand": "SKF", "manufacturer_designation": "YET 212-207", "series": "YEL2-series", "type": "insert", "d_mm": 61.912499999999994, "D_mm": 110, "B_mm": 36.7, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 52.7, "static_load_kN": 36, "fatigue_load_limit_kN": 1.53, "limiting_speed_rpm": 3400, "max_rpm": 3400, "weight_g": 1250, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YET 212-207 is a eccentric-locking-collar insert bearing with a one-side-extended inner ring, 61.912499999999994x110x36.7 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction pairs capped deep-groove geometry with a one-piece eccentric locking collar and a convex outer ring — quick to mount on plain commercial shafts and tolerant of initial static misalignment. reading YET: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended on one side. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -207 = 61.912 mm, which is why this row sits beside, not on, the metric bore size. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units. Envelope 61.912499999999994x110x36.7 mm (2.438x4.331x1.445 in), outer ring 26 mm wide, C 52.7 kN, C0 36 kN, Pu 1.53 kN. Mounted width B1 52.6 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 3,400 r/min; mass 1250 g. Static-first planning: the 0.981 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 61.912499999999994 mm shaft, not the 52.7 kN L10 value. At the printed limiting speed of 3,400 r/min the mean diameter dm = 85.956 mm implies dn about 2.92x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Mass-to-load ratio for YET-212-207: 23.719 g of catalogue mass per rated kN of C, and 20.19 g per millimetre of bore — useful when comparing executions of the same 61.912499999999994x110 mm envelope on the drawing. Width accounting: B1 52.6 mm covers the bearing WITH its eccentric locking collar against 36.7 mm for the bearing itself and 26 mm outer-ring width; housing axial space is drawn to B1, seal replacement space to B. Load balance for documentation: C0 36 kN against C 52.7 kN gives a 0.683 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. One-side collar note: the eccentric collar mounts on the extended side only and must turn in the shaft rotation direction to self-tighten; on reversing drives this design can loosen by design intent — choose grub-screw or ConCentra locking for true bidirectional shafts. Direction rule for YET-212-207: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 61.912499999999994 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "heavy agricultural and harvesting equipment", "forestry and chipper drives", "one-direction bulk conveyor shafts" ], "failure_modes": [ "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "eccentric collar mounted against rotation direction works loose and spins, fretting the shaft", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "The eccentric collar is handed to running direction; fit it wrong on the 61.912499999999994 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "Overall width 52.6 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YET collar.", "Ordering discipline for the 61.912499999999994 mm size: the chapter lists several executions side by side (YEL2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YET-212-207?", "a": "The catalogue envelope is 61.912499999999994x110x36.7 mm with a spherical outside surface; mass 1250 g. Ratings C 52.7/36 kN, Pu 1.53 kN, limiting speed 3,400 r/min." }, { "q": "What does the designation YET 212-207 mean?", "a": "reading YET: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended on one side. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -207 = 61.912 mm, which is why this row sits beside, not on, the metric bore size. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units." }, { "q": "Why is the collar sometimes wider than the bearing (B1)?", "a": "The B1 dimension includes the eccentric collar's axial width, so the housing needs that extra space beside the bearing. Draw housings to B1, not B, when replacing a grub-screw unit with a collar unit." }, { "q": "What is the difference between YET and YEL?", "a": "YET has the inner ring extended on one side; YEL extends it on both sides. Both lock with the eccentric collar and share bore/OD geometry; the sealed -2F executions sit in the YEL listings." } ], "cross_ref": [ { "equiv_sku": "YET", "equiv_brand": "ISO 15", "level": "full", "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YET-212-207", "YET 212-207" ], "locale_variants": {} }, { "sku": "YEL-212-207-2F", "brand": "SKF", "manufacturer_designation": "YEL 212-207-2F", "series": "YEL2-series", "type": "insert", "d_mm": 61.912499999999994, "D_mm": 110, "B_mm": 61.9, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 52.7, "static_load_kN": 36, "fatigue_load_limit_kN": 1.53, "limiting_speed_rpm": 3400, "max_rpm": 3400, "weight_g": 1600, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YEL2 series order number YEL 212-207-2F is a SKF insert bearing (Y-bearing) for a 61.912499999999994 mm (2.438 in) shaft: eccentric-locking-collar insert bearing with the inner ring extended on both sides, built to the ISO 15 diameter-series envelope with a sphered OD of 110 mm. Inside sits a sealed ball insert with an eccentric collar on the extended ring: collar bite locks the shaft, the contact seals retain the life grease, and the spherical OD floats in the Y-housing. YEL means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on both sides. inch bore code -207 decodes as 2\" +7/16, i.e. 61.912 mm; the metric coded size YEL 212 shares the same envelope but its bore is the metric value, not this one. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 61.912499999999994x110x61.9 mm (2.438x4.331x2.437 in), outer ring 26 mm wide, C 52.7 kN, C0 36 kN, Pu 1.53 kN. Mounted width B1 77.8 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 3,400 r/min; mass 1600 g. Fatigue-limit check: Pu 1.53 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YEL 212-207-2F — most belt-driven mounted-unit loads sit comfortably under 2.903 % of C. Spherical-seat note in numbers: the 110 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 85.956 = 270.039 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Bore-to-OD planning: OD 110 over bore 61.912499999999994 is a 1.777x step, while bore/overall-width gives 1; the spherical seat in the matching Y-housing must be specified to the 110 mm OD, not to a cylindrical housing bore. Imperial procurement cross-check: 2.438 in bore, 4.331 in OD, 2.437 in overall width; the 1600 g mass converts to 1.600 kg (56.4 oz) for the bill of materials. Mass-to-load ratio for YEL-212-207-2F: 30.361 g of catalogue mass per rated kN of C, and 25.843 g per millimetre of bore — useful when comparing executions of the same 61.912499999999994x110 mm envelope on the drawing. Two-side sealed collar note: after driving the eccentric collar tight, lock the collar set screw against its recess and verify the collar cannot be turned by hand; a collar that was merely pressed on without the eccentric bite spins on the shaft and frets it within hours. Direction rule for YEL-212-207-2F: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 61.912499999999994 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.", "applications": [ "heavy agricultural and harvesting equipment", "forestry and chipper drives", "one-direction bulk conveyor shafts" ], "failure_modes": [ "burr or paint under the eccentric faces prevents full bite, leaving an eccentric preload that runs hot", "collar forced on a reversing application repeatedly loads and unloads the eccentric, fretting both parts", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "Overall width 77.8 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.", "Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.", "The eccentric collar is handed to running direction; fit it wrong on the 61.912499999999994 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.", "The 52.7/36 kN figures belong specifically to YEL 212-207-2F; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YEL-212-207-2F?", "a": "Boundary dimensions: bore 61.912499999999994 mm, sphered OD 110 mm, overall width 61.9 mm (77.8 mm with the collar); weight 1600 g. Loads: dynamic 52.7 kN, static 36 kN, fatigue 1.53 kN; the only published speed is the 3,400 r/min limiting value." }, { "q": "What does the designation YEL 212-207-2F mean?", "a": "YEL means collar locking instead of grub screws — fit the eccentric collar, turn it in the rotation direction until it grips, then lock the collar's own setscrew; the inner ring is extended on both sides. inch bore code -207 decodes as 2\" +7/16, i.e. 61.912 mm; the metric coded size YEL 212 shares the same envelope but its bore is the metric value, not this one. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "What is the difference between YET and YEL?", "a": "YET has the inner ring extended on one side; YEL extends it on both sides. Both lock with the eccentric collar and share bore/OD geometry; the sealed -2F executions sit in the YEL listings." }, { "q": "Can eccentric-collar bearings run in both directions?", "a": "They are intended for one predominant running direction; true reversing drives can unwind the eccentric. For bidirectional or vibrating shafts choose grub-screw or SKF ConCentra (YSP) locking." } ], "cross_ref": [ { "equiv_sku": "YEL", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YEL-212-207-2F", "YEL 212-207-2F" ], "locale_variants": {} }, { "sku": "YSPAG-205", "brand": "SKF", "manufacturer_designation": "YSPAG 205", "series": "YSP2-series", "type": "insert", "d_mm": 25, "D_mm": 52, "B_mm": 33.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 14, "static_load_kN": 7.8, "fatigue_load_limit_kN": 0.335, "limiting_speed_rpm": 1500, "max_rpm": 1500, "weight_g": 180, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YSPAG 205 is SKF's 25 mm-bore SKF ConCentra insert bearing with concentric stepped-sleeve locking and symmetrically extended inner ring in the YSP2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 25x52x33.2 mm. The ConCentra principle replaces point or eccentric clamping: a stepped sleeve between shaft and inner ring is driven axially to contract uniformly, concentric with the sphered-OD sealed ball insert. the YSP prefix names SKF ConCentra locking: a stepped (multi-diameter) sleeve between shaft and inner ring is driven axially to grip concentrically, avoiding the local shaft fretting of set screws or the imbalance of an eccentric collar. the size code 205 carries the usual bore arithmetic — 25 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. AG marks the agricultural-machinery application execution, built on the sealed both-sides-extended geometry and tuned for the low-speed, shock-laden duty of harvesters, balers and spreaders — note the catalogue prints a much reduced limiting speed for this variant. Envelope 25x52x33.2 mm (0.984x2.047x1.307 in), outer ring 15 mm wide, C 14 kN, C0 7.8 kN, Pu 0.335 kN. The catalogue publishes a single speed ceiling, the limiting speed: 1,500 r/min; mass 180 g. Capacity density: 14 kN from 0.180 kg of bearing steel is about 77.778 kN per kilogram, and per width millimetre the 33.2 mm unit carries 0.422 kN of dynamic capacity. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 33.7 mm, d2 41.7 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the inner flinger. Spherical-seat note in numbers: the 52 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 38.5 = 120.951 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Envelope arithmetic: the radial section from 25 mm bore to 52 mm OD is 13.5 mm; dividing C 14 kN by that section gives 1.037 kN per section millimetre, and the 33.2 mm overall width is 2.459x the section. Outer-vs-overall width: the outer ring is 15 mm wide inside the 33.2 mm total, so the extended inner ring accounts for 0.548 of the overall width (9.1 mm of axial projection per side). Sleeve geometry: the ConCentra stepped sleeve occupies the symmetric extension up to the 33.2 mm overall width while the sphered outer ring stays 15 mm wide — uniform sleeve contraction is why run-out stays low at 25 mm bore.", "applications": [ "vibrating conveyors and sieves where screws loosen", "high-speed textile and processing rollers", "fan and blower positions sensitive to imbalance" ], "failure_modes": [ "stepped sleeve driven crooked scores the shaft and leaves one clamping arc unloaded", "undersized/over-toleranced shaft never reaches full sleeve grip despite correct drive-up", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "ConCentra solves run-out and fretting but not gross misalignment — the housing spherical seat still carries that function; do not use the sleeve grip as an excuse to skip housing alignment.", "The SB shortened-inner-ring ConCentra unit needs its matching mounting sleeve and procedure; substituting a standard YSP sleeve or a generic drift is the usual cause of crooked drive-up on the 25 mm shaft.", "Inspect the shaft before sleeve mounting: a single deep keyway burr or old screw-point dimple under the 33.2 mm-wide sleeve causes a local unclamped arc that later frets.", "Ordering discipline for the 25 mm size: the chapter lists several executions side by side (YSP2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSPAG-205?", "a": "YSPAG 205 measures 25 mm bore x 52 mm OD x 33.2 mm overall width (outer ring 15 mm wide), 0.984 x 2.047 x 1.307 in; mass about 180 g. SKF 17000 ratings: C 14 kN, C0 7.8 kN, Pu 0.335 kN, limiting speed 1,500 r/min." }, { "q": "What does the designation YSPAG 205 mean?", "a": "the YSP prefix names SKF ConCentra locking: a stepped (multi-diameter) sleeve between shaft and inner ring is driven axially to grip concentrically, avoiding the local shaft fretting of set screws or the imbalance of an eccentric collar. the size code 205 carries the usual bore arithmetic — 25 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. AG marks the agricultural-machinery application execution, built on the sealed both-sides-extended geometry and tuned for the low-speed, shock-laden duty of harvesters, balers and spreaders — note the catalogue prints a much reduced limiting speed for this variant." }, { "q": "Can the locking sleeve be reused?", "a": "Usually not after a full service life or an over-torqued first mounting: the stepped sleeve takes a permanent set. SKF recommends a new sleeve whenever the bearing is replaced on the same shaft." }, { "q": "When should I choose YSP over YAR or YEL?", "a": "Choose ConCentra for high run-out accuracy, vibrating or reversing shafts, and shafts that must not be marked: fans, vibrating conveyors, sieves and balanced rotors. It needs the correct sleeve and drive procedure rather than simple screw tightening." } ], "cross_ref": [ { "equiv_sku": "YSP-205-SB-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x33.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSP 205 SB-2F is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YSPAG-205-100", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x33.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSPAG 205-100 is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YSP-205-100-SB-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x33.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSP 205-100 SB-2F is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSPAG-205", "YSPAG 205" ], "locale_variants": {} }, { "sku": "YSP-205-SB-2F", "brand": "SKF", "manufacturer_designation": "YSP 205 SB-2F", "series": "YSP2-series", "type": "insert", "d_mm": 25, "D_mm": 52, "B_mm": 33.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 14, "static_load_kN": 7.8, "fatigue_load_limit_kN": 0.335, "limiting_speed_rpm": 7000, "max_rpm": 7000, "weight_g": 190, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YSP 205 SB-2F is SKF's 25 mm-bore SKF ConCentra insert bearing with concentric stepped-sleeve locking and symmetrically extended inner ring in the YSP2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 25x52x33.2 mm. The ConCentra principle replaces point or eccentric clamping: a stepped sleeve between shaft and inner ring is driven axially to contract uniformly, concentric with the sphered-OD sealed ball insert. the YSP prefix names SKF ConCentra locking: a stepped (multi-diameter) sleeve between shaft and inner ring is driven axially to grip concentrically, avoiding the local shaft fretting of set screws or the imbalance of an eccentric collar. the size code 205 carries the usual bore arithmetic — 25 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 25x52x33.2 mm (0.984x2.047x1.307 in), outer ring 15 mm wide, C 14 kN, C0 7.8 kN, Pu 0.335 kN. The catalogue publishes a single speed ceiling, the limiting speed: 7,000 r/min; mass 190 g. Grease-life arithmetic is dominated by speed: at dn approx 2.69x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Imperial procurement cross-check: 0.984 in bore, 2.047 in OD, 1.307 in overall width; the 190 g mass converts to 0.190 kg (6.7 oz) for the bill of materials. Bore-to-OD planning: OD 52 over bore 25 is a 2.08x step, while bore/overall-width gives 0.753; the spherical seat in the matching Y-housing must be specified to the 52 mm OD, not to a cylindrical housing bore. Spherical-seat note in numbers: the 52 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 38.5 = 120.951 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Fatigue-limit check: Pu 0.335 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YSP 205 SB-2F — most belt-driven mounted-unit loads sit comfortably under 2.393 % of C. ConCentra mounting note: the SB shortened-inner-ring sleeve is driven AXIALLY with the proper sleeve/drift until it seats against the abutment — driving at an angle burrs the stepped sleeve and destroys the concentricity advantage; removal needs the matching withdrawal technique, never a puller on the flingers. Reuse note for YSP-205-SB-2F: the stepped locking sleeve is a one-time clamping component in most over-torque cases; if the 25 mm shaft shows a polished sleeve imprint after withdrawal, fit a new sleeve rather than re-driving the old one.", "applications": [ "fan and blower positions sensitive to imbalance", "high-speed textile and processing rollers", "food and packaging conveyors" ], "failure_modes": [ "puller applied to the sealed outer side during removal destroys flingers and seals instead of releasing the sleeve", "undersized/over-toleranced shaft never reaches full sleeve grip despite correct drive-up", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "The SB shortened-inner-ring ConCentra unit needs its matching mounting sleeve and procedure; substituting a standard YSP sleeve or a generic drift is the usual cause of crooked drive-up on the 25 mm shaft.", "ConCentra solves run-out and fretting but not gross misalignment — the housing spherical seat still carries that function; do not use the sleeve grip as an excuse to skip housing alignment.", "Inspect the shaft before sleeve mounting: a single deep keyway burr or old screw-point dimple under the 33.2 mm-wide sleeve causes a local unclamped arc that later frets.", "Catalogue ratings belong to YSP 205 SB-2F as the concentra two f execution; other order numbers of the YSP 205 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSP-205-SB-2F?", "a": "YSP 205 SB-2F measures 25 mm bore x 52 mm OD x 33.2 mm overall width (outer ring 15 mm wide), 0.984 x 2.047 x 1.307 in; mass about 190 g. SKF 17000 ratings: C 14 kN, C0 7.8 kN, Pu 0.335 kN, limiting speed 7,000 r/min." }, { "q": "What does the designation YSP 205 SB-2F mean?", "a": "the YSP prefix names SKF ConCentra locking: a stepped (multi-diameter) sleeve between shaft and inner ring is driven axially to grip concentrically, avoiding the local shaft fretting of set screws or the imbalance of an eccentric collar. the size code 205 carries the usual bore arithmetic — 25 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "When should I choose YSP over YAR or YEL?", "a": "Choose ConCentra for high run-out accuracy, vibrating or reversing shafts, and shafts that must not be marked: fans, vibrating conveyors, sieves and balanced rotors. It needs the correct sleeve and drive procedure rather than simple screw tightening." }, { "q": "What does SB mean in YSP 205 SB-2F?", "a": "SB identifies the ConCentra ball bearing with a shortened inner ring; the overall width is shorter than the non-SB ConCentra design while keeping the concentric sleeve lock and the -2F seal/flinger package." } ], "cross_ref": [ { "equiv_sku": "YSPAG-205", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x33.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSPAG 205 is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YSPAG-205-100", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x33.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSPAG 205-100 is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YSP-205-100-SB-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 25x52x33.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSP 205-100 SB-2F is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSP-205-SB-2F", "YSP 205 SB-2F" ], "locale_variants": {} }, { "sku": "YSPAG-206", "brand": "SKF", "manufacturer_designation": "YSPAG 206", "series": "YSP2-series", "type": "insert", "d_mm": 30, "D_mm": 62, "B_mm": 37.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 19.5, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 1200, "max_rpm": 1200, "weight_g": 300, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YSPAG 206 is a SKF ConCentra insert bearing with concentric stepped-sleeve locking and symmetrically extended inner ring, 30x62x37.2 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction is a sealed deep-groove insert, a symmetrically extended inner ring and the stepped ConCentra sleeve — uniform grip, minimal run-out, no shaft damage from screw points or an eccentric mass. reading YSP: SKF ConCentra technology locks the shaft through a stepped sleeve that contracts uniformly, chosen for high run-out accuracy and for shafts that must not be marked by screw points or an eccentric. the size code 206 carries the usual bore arithmetic — 30 mm (code 06 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery. Envelope 30x62x37.2 mm (1.181x2.441x1.465 in), outer ring 18 mm wide, C 19.5 kN, C0 11.2 kN, Pu 0.475 kN. The catalogue publishes a single speed ceiling, the limiting speed: 1,200 r/min; mass 300 g. Imperial procurement cross-check: 1.181 in bore, 2.441 in OD, 1.465 in overall width; the 300 g mass converts to 0.300 kg (10.6 oz) for the bill of materials. Fillet discipline: the printed minimum-fillet limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 30x62 mm insert on its chamfer tilts the whole spherical seat. Grease-life arithmetic is dominated by speed: at dn approx 0.55x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the AG variant caps speed so aggressively, and high-temperature mounts shorten both even when load is light. Mass-to-load ratio for YSPAG-206: 15.385 g of catalogue mass per rated kN of C, and 10 g per millimetre of bore — useful when comparing executions of the same 30x62 mm envelope on the drawing. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 39.7 mm, d2 48 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the inner flinger. Sleeve geometry: the ConCentra stepped sleeve occupies the symmetric extension up to the 37.2 mm overall width while the sphered outer ring stays 18 mm wide — uniform sleeve contraction is why run-out stays low at 30 mm bore.", "applications": [ "high-speed textile and processing rollers", "food and packaging conveyors", "fan and blower positions sensitive to imbalance" ], "failure_modes": [ "undersized/over-toleranced shaft never reaches full sleeve grip despite correct drive-up", "sleeve re-driven after a first seating without cleaning gives false drive-up and creep under load", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "The SB shortened-inner-ring ConCentra unit needs its matching mounting sleeve and procedure; substituting a standard YSP sleeve or a generic drift is the usual cause of crooked drive-up on the 30 mm shaft.", "ConCentra solves run-out and fretting but not gross misalignment — the housing spherical seat still carries that function; do not use the sleeve grip as an excuse to skip housing alignment.", "Inspect the shaft before sleeve mounting: a single deep keyway burr or old screw-point dimple under the 37.2 mm-wide sleeve causes a local unclamped arc that later frets.", "Catalogue ratings belong to YSPAG 206 as the concentra two ag execution; other order numbers of the YSPAG 206 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSPAG-206?", "a": "The catalogue envelope is 30x62x37.2 mm with a spherical outside surface; mass 300 g. Ratings C 19.5/11.2 kN, Pu 0.475 kN, limiting speed 1,200 r/min." }, { "q": "What does the designation YSPAG 206 mean?", "a": "reading YSP: SKF ConCentra technology locks the shaft through a stepped sleeve that contracts uniformly, chosen for high run-out accuracy and for shafts that must not be marked by screw points or an eccentric. the size code 206 carries the usual bore arithmetic — 30 mm (code 06 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery." }, { "q": "What is SKF ConCentra locking?", "a": "A stepped (multi-diameter) sleeve between the shaft and the tapered/stepped inner-ring seat is driven axially until it contracts uniformly around the shaft — full-circumference grip, low run-out and no screw-point indentations or eccentric imbalance." }, { "q": "Can the locking sleeve be reused?", "a": "Usually not after a full service life or an over-torqued first mounting: the stepped sleeve takes a permanent set. SKF recommends a new sleeve whenever the bearing is replaced on the same shaft." } ], "cross_ref": [ { "equiv_sku": "YSP-206-SB-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x37.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSP 206 SB-2F is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YSPAG-206-103", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x37.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSPAG 206-103 is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YSP-206-103-SB-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x37.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSP 206-103 SB-2F is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSPAG-206", "YSPAG 206" ], "locale_variants": {} }, { "sku": "YSP-206-SB-2F", "brand": "SKF", "manufacturer_designation": "YSP 206 SB-2F", "series": "YSP2-series", "type": "insert", "d_mm": 30, "D_mm": 62, "B_mm": 37.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 19.5, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 6300, "max_rpm": 6300, "weight_g": 310, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YSP 206 SB-2F is a SKF ConCentra insert bearing with concentric stepped-sleeve locking and symmetrically extended inner ring, 30x62x37.2 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction is a sealed deep-groove insert, a symmetrically extended inner ring and the stepped ConCentra sleeve — uniform grip, minimal run-out, no shaft damage from screw points or an eccentric mass. reading YSP: SKF ConCentra technology locks the shaft through a stepped sleeve that contracts uniformly, chosen for high run-out accuracy and for shafts that must not be marked by screw points or an eccentric. the size code 206 carries the usual bore arithmetic — 30 mm (code 06 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution. Envelope 30x62x37.2 mm (1.181x2.441x1.465 in), outer ring 18 mm wide, C 19.5 kN, C0 11.2 kN, Pu 0.475 kN. The catalogue publishes a single speed ceiling, the limiting speed: 6,300 r/min; mass 310 g. The s1 23.2 mm dimension is printed for the locking zone — the pre-drive position of the ConCentra stepped sleeve — and it is verified at mounting, not recoverable from d/D/B alone. Grease-life arithmetic is dominated by speed: at dn approx 2.90x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Envelope arithmetic: the radial section from 30 mm bore to 62 mm OD is 16 mm; dividing C 19.5 kN by that section gives 1.219 kN per section millimetre, and the 37.2 mm overall width is 2.325x the section. Selection figures for YSP 206 SB-2F: C0/C is 0.574, Pu 0.475 kN is 2.436 % of the 19.5 kN dynamic rating, and the 310 g catalogue mass works out to roughly 10.333 g per millimetre of the 30 mm bore. Imperial procurement cross-check: 1.181 in bore, 2.441 in OD, 1.465 in overall width; the 310 g mass converts to 0.310 kg (10.9 oz) for the bill of materials. ConCentra mounting note: the SB shortened-inner-ring sleeve is driven AXIALLY with the proper sleeve/drift until it seats against the abutment — driving at an angle burrs the stepped sleeve and destroys the concentricity advantage; removal needs the matching withdrawal technique, never a puller on the flingers. Reuse note for YSP-206-SB-2F: the stepped locking sleeve is a one-time clamping component in most over-torque cases; if the 30 mm shaft shows a polished sleeve imprint after withdrawal, fit a new sleeve rather than re-driving the old one.", "applications": [ "high-speed textile and processing rollers", "vibrating conveyors and sieves where screws loosen", "fan and blower positions sensitive to imbalance" ], "failure_modes": [ "undersized/over-toleranced shaft never reaches full sleeve grip despite correct drive-up", "stepped sleeve driven crooked scores the shaft and leaves one clamping arc unloaded", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "The SB shortened-inner-ring ConCentra unit needs its matching mounting sleeve and procedure; substituting a standard YSP sleeve or a generic drift is the usual cause of crooked drive-up on the 30 mm shaft.", "Inspect the shaft before sleeve mounting: a single deep keyway burr or old screw-point dimple under the 37.2 mm-wide sleeve causes a local unclamped arc that later frets.", "ConCentra solves run-out and fretting but not gross misalignment — the housing spherical seat still carries that function; do not use the sleeve grip as an excuse to skip housing alignment.", "Catalogue ratings belong to YSP 206 SB-2F as the concentra two f execution; other order numbers of the YSP 206 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSP-206-SB-2F?", "a": "The catalogue envelope is 30x62x37.2 mm with a spherical outside surface; mass 310 g. Ratings C 19.5/11.2 kN, Pu 0.475 kN, limiting speed 6,300 r/min." }, { "q": "What does the designation YSP 206 SB-2F mean?", "a": "reading YSP: SKF ConCentra technology locks the shaft through a stepped sleeve that contracts uniformly, chosen for high run-out accuracy and for shafts that must not be marked by screw points or an eccentric. the size code 206 carries the usual bore arithmetic — 30 mm (code 06 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution." }, { "q": "Can the locking sleeve be reused?", "a": "Usually not after a full service life or an over-torqued first mounting: the stepped sleeve takes a permanent set. SKF recommends a new sleeve whenever the bearing is replaced on the same shaft." }, { "q": "When should I choose YSP over YAR or YEL?", "a": "Choose ConCentra for high run-out accuracy, vibrating or reversing shafts, and shafts that must not be marked: fans, vibrating conveyors, sieves and balanced rotors. It needs the correct sleeve and drive procedure rather than simple screw tightening." } ], "cross_ref": [ { "equiv_sku": "YSPAG-206", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x37.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSPAG 206 is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YSPAG-206-103", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x37.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSPAG 206-103 is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YSP-206-103-SB-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 30x62x37.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSP 206-103 SB-2F is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30 mm vs 30.162499999999998 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSP-206-SB-2F", "YSP 206 SB-2F" ], "locale_variants": {} }, { "sku": "YSPAG-207", "brand": "SKF", "manufacturer_designation": "YSPAG 207", "series": "YSP2-series", "type": "insert", "d_mm": 35, "D_mm": 72, "B_mm": 39.7, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 1100, "max_rpm": 1100, "weight_g": 440, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YSPAG 207 is a SKF ConCentra insert bearing with concentric stepped-sleeve locking and symmetrically extended inner ring, 35x72x39.7 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction is a sealed deep-groove insert, a symmetrically extended inner ring and the stepped ConCentra sleeve — uniform grip, minimal run-out, no shaft damage from screw points or an eccentric mass. reading YSP: SKF ConCentra technology locks the shaft through a stepped sleeve that contracts uniformly, chosen for high run-out accuracy and for shafts that must not be marked by screw points or an eccentric. the size code 207 carries the usual bore arithmetic — 35 mm (code 07 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery. Envelope 35x72x39.7 mm (1.378x2.835x1.563 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. The catalogue publishes a single speed ceiling, the limiting speed: 1,100 r/min; mass 440 g. Outer-vs-overall width: the outer ring is 19 mm wide inside the 39.7 mm total, so the extended inner ring accounts for 0.521 of the overall width (10.35 mm of axial projection per side). Capacity density: 25.5 kN from 0.440 kg of bearing steel is about 57.955 kN per kilogram, and per width millimetre the 39.7 mm unit carries 0.642 kN of dynamic capacity. Fatigue-limit check: Pu 0.655 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YSPAG 207 — most belt-driven mounted-unit loads sit comfortably under 2.569 % of C. The s1 24.5 mm dimension is printed for the locking zone — the pre-drive position of the ConCentra stepped sleeve — and it is verified at mounting, not recoverable from d/D/B alone. Static-first planning: the 0.385 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 35 mm shaft, not the 25.5 kN L10 value. Sleeve geometry: the ConCentra stepped sleeve occupies the symmetric extension up to the 39.7 mm overall width while the sphered outer ring stays 19 mm wide — uniform sleeve contraction is why run-out stays low at 35 mm bore.", "applications": [ "vibrating conveyors and sieves where screws loosen", "fan and blower positions sensitive to imbalance", "high-speed textile and processing rollers" ], "failure_modes": [ "stepped sleeve driven crooked scores the shaft and leaves one clamping arc unloaded", "puller applied to the sealed outer side during removal destroys flingers and seals instead of releasing the sleeve", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "Inspect the shaft before sleeve mounting: a single deep keyway burr or old screw-point dimple under the 39.7 mm-wide sleeve causes a local unclamped arc that later frets.", "The SB shortened-inner-ring ConCentra unit needs its matching mounting sleeve and procedure; substituting a standard YSP sleeve or a generic drift is the usual cause of crooked drive-up on the 35 mm shaft.", "ConCentra solves run-out and fretting but not gross misalignment — the housing spherical seat still carries that function; do not use the sleeve grip as an excuse to skip housing alignment.", "The 25.5/15.3 kN figures belong specifically to YSPAG 207; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSPAG-207?", "a": "The catalogue envelope is 35x72x39.7 mm with a spherical outside surface; mass 440 g. Ratings C 25.5/15.3 kN, Pu 0.655 kN, limiting speed 1,100 r/min." }, { "q": "What does the designation YSPAG 207 mean?", "a": "reading YSP: SKF ConCentra technology locks the shaft through a stepped sleeve that contracts uniformly, chosen for high run-out accuracy and for shafts that must not be marked by screw points or an eccentric. the size code 207 carries the usual bore arithmetic — 35 mm (code 07 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery." }, { "q": "What does SB mean in YSPAG 207?", "a": "SB identifies the ConCentra ball bearing with a shortened inner ring; the overall width is shorter than the non-SB ConCentra design while keeping the concentric sleeve lock and the -2F seal/flinger package." }, { "q": "What is SKF ConCentra locking?", "a": "A stepped (multi-diameter) sleeve between the shaft and the tapered/stepped inner-ring seat is driven axially until it contracts uniformly around the shaft — full-circumference grip, low run-out and no screw-point indentations or eccentric imbalance." } ], "cross_ref": [ { "equiv_sku": "YSP-207-SB-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x39.7 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSP 207 SB-2F is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YSPAG-207-106", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x39.7 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSPAG 207-106 is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YSP-207-106-SB-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x39.7 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSP 207-106 SB-2F is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSPAG-207", "YSPAG 207" ], "locale_variants": {} }, { "sku": "YSP-207-SB-2F", "brand": "SKF", "manufacturer_designation": "YSP 207 SB-2F", "series": "YSP2-series", "type": "insert", "d_mm": 35, "D_mm": 72, "B_mm": 39.7, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 5300, "max_rpm": 5300, "weight_g": 450, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YSP 207 SB-2F is a SKF ConCentra insert bearing with concentric stepped-sleeve locking and symmetrically extended inner ring, 35x72x39.7 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction is a sealed deep-groove insert, a symmetrically extended inner ring and the stepped ConCentra sleeve — uniform grip, minimal run-out, no shaft damage from screw points or an eccentric mass. reading YSP: SKF ConCentra technology locks the shaft through a stepped sleeve that contracts uniformly, chosen for high run-out accuracy and for shafts that must not be marked by screw points or an eccentric. the size code 207 carries the usual bore arithmetic — 35 mm (code 07 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution. Envelope 35x72x39.7 mm (1.378x2.835x1.563 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. The catalogue publishes a single speed ceiling, the limiting speed: 5,300 r/min; mass 450 g. Grease-life arithmetic is dominated by speed: at dn approx 2.84x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Bore-to-OD planning: OD 72 over bore 35 is a 2.057x step, while bore/overall-width gives 0.882; the spherical seat in the matching Y-housing must be specified to the 72 mm OD, not to a cylindrical housing bore. Imperial procurement cross-check: 1.378 in bore, 2.835 in OD, 1.563 in overall width; the 450 g mass converts to 0.450 kg (15.9 oz) for the bill of materials. Mass-to-load ratio for YSP-207-SB-2F: 17.647 g of catalogue mass per rated kN of C, and 12.857 g per millimetre of bore — useful when comparing executions of the same 35x72 mm envelope on the drawing. Selection figures for YSP 207 SB-2F: C0/C is 0.6, Pu 0.655 kN is 2.569 % of the 25.5 kN dynamic rating, and the 450 g catalogue mass works out to roughly 12.857 g per millimetre of the 35 mm bore. ConCentra mounting note: the SB shortened-inner-ring sleeve is driven AXIALLY with the proper sleeve/drift until it seats against the abutment — driving at an angle burrs the stepped sleeve and destroys the concentricity advantage; removal needs the matching withdrawal technique, never a puller on the flingers. Reuse note for YSP-207-SB-2F: the stepped locking sleeve is a one-time clamping component in most over-torque cases; if the 35 mm shaft shows a polished sleeve imprint after withdrawal, fit a new sleeve rather than re-driving the old one.", "applications": [ "fan and blower positions sensitive to imbalance", "food and packaging conveyors", "vibrating conveyors and sieves where screws loosen" ], "failure_modes": [ "puller applied to the sealed outer side during removal destroys flingers and seals instead of releasing the sleeve", "sleeve re-driven after a first seating without cleaning gives false drive-up and creep under load", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "Inspect the shaft before sleeve mounting: a single deep keyway burr or old screw-point dimple under the 39.7 mm-wide sleeve causes a local unclamped arc that later frets.", "The SB shortened-inner-ring ConCentra unit needs its matching mounting sleeve and procedure; substituting a standard YSP sleeve or a generic drift is the usual cause of crooked drive-up on the 35 mm shaft.", "ConCentra solves run-out and fretting but not gross misalignment — the housing spherical seat still carries that function; do not use the sleeve grip as an excuse to skip housing alignment.", "The 25.5/15.3 kN figures belong specifically to YSP 207 SB-2F; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSP-207-SB-2F?", "a": "The catalogue envelope is 35x72x39.7 mm with a spherical outside surface; mass 450 g. Ratings C 25.5/15.3 kN, Pu 0.655 kN, limiting speed 5,300 r/min." }, { "q": "What does the designation YSP 207 SB-2F mean?", "a": "reading YSP: SKF ConCentra technology locks the shaft through a stepped sleeve that contracts uniformly, chosen for high run-out accuracy and for shafts that must not be marked by screw points or an eccentric. the size code 207 carries the usual bore arithmetic — 35 mm (code 07 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution." }, { "q": "What is SKF ConCentra locking?", "a": "A stepped (multi-diameter) sleeve between the shaft and the tapered/stepped inner-ring seat is driven axially until it contracts uniformly around the shaft — full-circumference grip, low run-out and no screw-point indentations or eccentric imbalance." }, { "q": "Can the locking sleeve be reused?", "a": "Usually not after a full service life or an over-torqued first mounting: the stepped sleeve takes a permanent set. SKF recommends a new sleeve whenever the bearing is replaced on the same shaft." } ], "cross_ref": [ { "equiv_sku": "YSPAG-207", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x39.7 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSPAG 207 is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YSPAG-207-106", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x39.7 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSPAG 207-106 is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YSP-207-106-SB-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 35x72x39.7 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSP 207-106 SB-2F is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 35 mm vs 34.925 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSP-207-SB-2F", "YSP 207 SB-2F" ], "locale_variants": {} }, { "sku": "YSPAG-208", "brand": "SKF", "manufacturer_designation": "YSPAG 208", "series": "YSP2-series", "type": "insert", "d_mm": 40, "D_mm": 80, "B_mm": 43.1, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 30.7, "static_load_kN": 19, "fatigue_load_limit_kN": 0.8, "limiting_speed_rpm": 950, "max_rpm": 950, "weight_g": 580, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YSPAG 208 is a SKF ConCentra insert bearing with concentric stepped-sleeve locking and symmetrically extended inner ring, 40x80x43.1 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction is a sealed deep-groove insert, a symmetrically extended inner ring and the stepped ConCentra sleeve — uniform grip, minimal run-out, no shaft damage from screw points or an eccentric mass. reading YSP: SKF ConCentra technology locks the shaft through a stepped sleeve that contracts uniformly, chosen for high run-out accuracy and for shafts that must not be marked by screw points or an eccentric. the size code 208 carries the usual bore arithmetic — 40 mm (code 08 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery. Envelope 40x80x43.1 mm (1.575x3.15x1.697 in), outer ring 21 mm wide, C 30.7 kN, C0 19 kN, Pu 0.8 kN. The catalogue publishes a single speed ceiling, the limiting speed: 950 r/min; mass 580 g. Fatigue-limit check: Pu 0.8 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YSPAG 208 — most belt-driven mounted-unit loads sit comfortably under 2.606 % of C. Load balance for documentation: C0 19 kN against C 30.7 kN gives a 0.619 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Pitch-diameter arithmetic: dm = (40+80)/2 = 60 mm; at the 950 r/min limiting speed the ball set runs at dn approx 0.57x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. The s1 26.2 mm dimension is printed for the locking zone — the pre-drive position of the ConCentra stepped sleeve — and it is verified at mounting, not recoverable from d/D/B alone. At the printed limiting speed of 950 r/min the mean diameter dm = 60 mm implies dn about 0.57x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Reuse note for YSPAG-208: the stepped locking sleeve is a one-time clamping component in most over-torque cases; if the 40 mm shaft shows a polished sleeve imprint after withdrawal, fit a new sleeve rather than re-driving the old one.", "applications": [ "fan and blower positions sensitive to imbalance", "high-speed textile and processing rollers", "food and packaging conveyors" ], "failure_modes": [ "puller applied to the sealed outer side during removal destroys flingers and seals instead of releasing the sleeve", "undersized/over-toleranced shaft never reaches full sleeve grip despite correct drive-up", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "ConCentra solves run-out and fretting but not gross misalignment — the housing spherical seat still carries that function; do not use the sleeve grip as an excuse to skip housing alignment.", "The SB shortened-inner-ring ConCentra unit needs its matching mounting sleeve and procedure; substituting a standard YSP sleeve or a generic drift is the usual cause of crooked drive-up on the 40 mm shaft.", "Inspect the shaft before sleeve mounting: a single deep keyway burr or old screw-point dimple under the 43.1 mm-wide sleeve causes a local unclamped arc that later frets.", "Ordering discipline for the 40 mm size: the chapter lists several executions side by side (YSP2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSPAG-208?", "a": "The catalogue envelope is 40x80x43.1 mm with a spherical outside surface; mass 580 g. Ratings C 30.7/19 kN, Pu 0.8 kN, limiting speed 950 r/min." }, { "q": "What does the designation YSPAG 208 mean?", "a": "reading YSP: SKF ConCentra technology locks the shaft through a stepped sleeve that contracts uniformly, chosen for high run-out accuracy and for shafts that must not be marked by screw points or an eccentric. the size code 208 carries the usual bore arithmetic — 40 mm (code 08 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery." }, { "q": "When should I choose YSP over YAR or YEL?", "a": "Choose ConCentra for high run-out accuracy, vibrating or reversing shafts, and shafts that must not be marked: fans, vibrating conveyors, sieves and balanced rotors. It needs the correct sleeve and drive procedure rather than simple screw tightening." }, { "q": "What does SB mean in YSPAG 208?", "a": "SB identifies the ConCentra ball bearing with a shortened inner ring; the overall width is shorter than the non-SB ConCentra design while keeping the concentric sleeve lock and the -2F seal/flinger package." } ], "cross_ref": [ { "equiv_sku": "YELAG-208", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x43.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 208 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YEL-208-2RF-VL065", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x43.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 208-2RF/VL065 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YEL-208-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x43.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 208-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YSP-208-SB-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x43.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSP 208 SB-2F is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSPAG-208", "YSPAG 208" ], "locale_variants": {} }, { "sku": "YSP-208-SB-2F", "brand": "SKF", "manufacturer_designation": "YSP 208 SB-2F", "series": "YSP2-series", "type": "insert", "d_mm": 40, "D_mm": 80, "B_mm": 43.1, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 30.7, "static_load_kN": 19, "fatigue_load_limit_kN": 0.8, "limiting_speed_rpm": 4800, "max_rpm": 4800, "weight_g": 590, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YSP 208 SB-2F is a SKF ConCentra insert bearing with concentric stepped-sleeve locking and symmetrically extended inner ring, 40x80x43.1 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction is a sealed deep-groove insert, a symmetrically extended inner ring and the stepped ConCentra sleeve — uniform grip, minimal run-out, no shaft damage from screw points or an eccentric mass. reading YSP: SKF ConCentra technology locks the shaft through a stepped sleeve that contracts uniformly, chosen for high run-out accuracy and for shafts that must not be marked by screw points or an eccentric. the size code 208 carries the usual bore arithmetic — 40 mm (code 08 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution. Envelope 40x80x43.1 mm (1.575x3.15x1.697 in), outer ring 21 mm wide, C 30.7 kN, C0 19 kN, Pu 0.8 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,800 r/min; mass 590 g. Capacity density: 30.7 kN from 0.590 kg of bearing steel is about 52.034 kN per kilogram, and per width millimetre the 43.1 mm unit carries 0.712 kN of dynamic capacity. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 51.8 mm, d2 62 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the plain flinger. Spherical-seat note in numbers: the 80 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 60 = 188.496 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Static-first planning: the 0.441 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 40 mm shaft, not the 30.7 kN L10 value. Grease-life arithmetic is dominated by speed: at dn approx 2.88x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. ConCentra mounting note: the SB shortened-inner-ring sleeve is driven AXIALLY with the proper sleeve/drift until it seats against the abutment — driving at an angle burrs the stepped sleeve and destroys the concentricity advantage; removal needs the matching withdrawal technique, never a puller on the flingers. Sleeve geometry: the ConCentra stepped sleeve occupies the symmetric extension up to the 43.1 mm overall width while the sphered outer ring stays 21 mm wide — uniform sleeve contraction is why run-out stays low at 40 mm bore.", "applications": [ "vibrating conveyors and sieves where screws loosen", "fan and blower positions sensitive to imbalance", "high-speed textile and processing rollers" ], "failure_modes": [ "stepped sleeve driven crooked scores the shaft and leaves one clamping arc unloaded", "puller applied to the sealed outer side during removal destroys flingers and seals instead of releasing the sleeve", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "ConCentra solves run-out and fretting but not gross misalignment — the housing spherical seat still carries that function; do not use the sleeve grip as an excuse to skip housing alignment.", "Inspect the shaft before sleeve mounting: a single deep keyway burr or old screw-point dimple under the 43.1 mm-wide sleeve causes a local unclamped arc that later frets.", "The SB shortened-inner-ring ConCentra unit needs its matching mounting sleeve and procedure; substituting a standard YSP sleeve or a generic drift is the usual cause of crooked drive-up on the 40 mm shaft.", "Ordering discipline for the 40 mm size: the chapter lists several executions side by side (YSP2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSP-208-SB-2F?", "a": "The catalogue envelope is 40x80x43.1 mm with a spherical outside surface; mass 590 g. Ratings C 30.7/19 kN, Pu 0.8 kN, limiting speed 4,800 r/min." }, { "q": "What does the designation YSP 208 SB-2F mean?", "a": "reading YSP: SKF ConCentra technology locks the shaft through a stepped sleeve that contracts uniformly, chosen for high run-out accuracy and for shafts that must not be marked by screw points or an eccentric. the size code 208 carries the usual bore arithmetic — 40 mm (code 08 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution." }, { "q": "What does SB mean in YSP 208 SB-2F?", "a": "SB identifies the ConCentra ball bearing with a shortened inner ring; the overall width is shorter than the non-SB ConCentra design while keeping the concentric sleeve lock and the -2F seal/flinger package." }, { "q": "What is SKF ConCentra locking?", "a": "A stepped (multi-diameter) sleeve between the shaft and the tapered/stepped inner-ring seat is driven axially until it contracts uniformly around the shaft — full-circumference grip, low run-out and no screw-point indentations or eccentric imbalance." } ], "cross_ref": [ { "equiv_sku": "YELAG-208", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x43.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 208 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YEL-208-2RF-VL065", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x43.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 208-2RF/VL065 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YEL-208-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x43.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 208-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YSPAG-208", "equiv_brand": "SKF", "level": "full", "note": "Same 40x80x43.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSPAG 208 is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSP-208-SB-2F", "YSP 208 SB-2F" ], "locale_variants": {} }, { "sku": "YSPAG-209", "brand": "SKF", "manufacturer_designation": "YSPAG 209", "series": "YSP2-series", "type": "insert", "d_mm": 45, "D_mm": 85, "B_mm": 44.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 33.2, "static_load_kN": 21.6, "fatigue_load_limit_kN": 0.915, "limiting_speed_rpm": 850, "max_rpm": 850, "weight_g": 640, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YSPAG 209 is a SKF ConCentra insert bearing with concentric stepped-sleeve locking and symmetrically extended inner ring, 45x85x44.2 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction is a sealed deep-groove insert, a symmetrically extended inner ring and the stepped ConCentra sleeve — uniform grip, minimal run-out, no shaft damage from screw points or an eccentric mass. reading YSP: SKF ConCentra technology locks the shaft through a stepped sleeve that contracts uniformly, chosen for high run-out accuracy and for shafts that must not be marked by screw points or an eccentric. the size code 209 carries the usual bore arithmetic — 45 mm (code 09 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery. Envelope 45x85x44.2 mm (1.772x3.346x1.74 in), outer ring 22 mm wide, C 33.2 kN, C0 21.6 kN, Pu 0.915 kN. The catalogue publishes a single speed ceiling, the limiting speed: 850 r/min; mass 640 g. Fatigue-limit check: Pu 0.915 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YSPAG 209 — most belt-driven mounted-unit loads sit comfortably under 2.756 % of C. Rating split for the maintenance file: dynamic 33.2 kN (L10), static 21.6 kN (s0 shock check), fatigue 0.915 kN (adjusted life) — three separate uses for YSPAG 209, none interchangeable with another. Grease-life arithmetic is dominated by speed: at dn approx 0.55x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the AG variant caps speed so aggressively, and high-temperature mounts shorten both even when load is light. The s1 26.7 mm dimension is printed for the locking zone — the pre-drive position of the ConCentra stepped sleeve — and it is verified at mounting, not recoverable from d/D/B alone. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 56.8 mm, d2 67 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the inner flinger. Sleeve geometry: the ConCentra stepped sleeve occupies the symmetric extension up to the 44.2 mm overall width while the sphered outer ring stays 22 mm wide — uniform sleeve contraction is why run-out stays low at 45 mm bore.", "applications": [ "fan and blower positions sensitive to imbalance", "vibrating conveyors and sieves where screws loosen", "food and packaging conveyors" ], "failure_modes": [ "puller applied to the sealed outer side during removal destroys flingers and seals instead of releasing the sleeve", "stepped sleeve driven crooked scores the shaft and leaves one clamping arc unloaded", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "Inspect the shaft before sleeve mounting: a single deep keyway burr or old screw-point dimple under the 44.2 mm-wide sleeve causes a local unclamped arc that later frets.", "The SB shortened-inner-ring ConCentra unit needs its matching mounting sleeve and procedure; substituting a standard YSP sleeve or a generic drift is the usual cause of crooked drive-up on the 45 mm shaft.", "ConCentra solves run-out and fretting but not gross misalignment — the housing spherical seat still carries that function; do not use the sleeve grip as an excuse to skip housing alignment.", "The 33.2/21.6 kN figures belong specifically to YSPAG 209; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSPAG-209?", "a": "The catalogue envelope is 45x85x44.2 mm with a spherical outside surface; mass 640 g. Ratings C 33.2/21.6 kN, Pu 0.915 kN, limiting speed 850 r/min." }, { "q": "What does the designation YSPAG 209 mean?", "a": "reading YSP: SKF ConCentra technology locks the shaft through a stepped sleeve that contracts uniformly, chosen for high run-out accuracy and for shafts that must not be marked by screw points or an eccentric. the size code 209 carries the usual bore arithmetic — 45 mm (code 09 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery." }, { "q": "Can the locking sleeve be reused?", "a": "Usually not after a full service life or an over-torqued first mounting: the stepped sleeve takes a permanent set. SKF recommends a new sleeve whenever the bearing is replaced on the same shaft." }, { "q": "When should I choose YSP over YAR or YEL?", "a": "Choose ConCentra for high run-out accuracy, vibrating or reversing shafts, and shafts that must not be marked: fans, vibrating conveyors, sieves and balanced rotors. It needs the correct sleeve and drive procedure rather than simple screw tightening." } ], "cross_ref": [ { "equiv_sku": "YSP-209-SB-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 45x85x44.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSP 209 SB-2F is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSPAG-209", "YSPAG 209" ], "locale_variants": {} }, { "sku": "YSP-209-SB-2F", "brand": "SKF", "manufacturer_designation": "YSP 209 SB-2F", "series": "YSP2-series", "type": "insert", "d_mm": 45, "D_mm": 85, "B_mm": 44.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 33.2, "static_load_kN": 21.6, "fatigue_load_limit_kN": 0.915, "limiting_speed_rpm": 4300, "max_rpm": 4300, "weight_g": 660, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YSP2 series order number YSP 209 SB-2F is a SKF insert bearing (Y-bearing) for a 45 mm shaft: SKF ConCentra insert bearing with concentric stepped-sleeve locking and symmetrically extended inner ring, built to the ISO 15 diameter-series envelope with a sphered OD of 85 mm. Inside is a capped ball insert whose extended inner ring tapers onto a multi-step locking sleeve; the sleeve grips the shaft around its full circumference and the spherical outer ring pivots in the housing. YSP denotes the ConCentra design — the SB execution in this chapter has the shortened inner ring; axial driving of the stepped sleeve produces a near-true concentric clamp with virtually no run-out penalty. the size code 209 carries the usual bore arithmetic — 45 mm (code 09 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 45x85x44.2 mm (1.772x3.346x1.74 in), outer ring 22 mm wide, C 33.2 kN, C0 21.6 kN, Pu 0.915 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,300 r/min; mass 660 g. Load balance for documentation: C0 21.6 kN against C 33.2 kN gives a 0.651 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Static-first planning: the 0.489 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 45 mm shaft, not the 33.2 kN L10 value. Speed ceiling of 4,300 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Envelope arithmetic: the radial section from 45 mm bore to 85 mm OD is 20 mm; dividing C 33.2 kN by that section gives 1.66 kN per section millimetre, and the 44.2 mm overall width is 2.21x the section. Pitch-diameter arithmetic: dm = (45+85)/2 = 65 mm; at the 4,300 r/min limiting speed the ball set runs at dn approx 2.79x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. ConCentra mounting note: the SB shortened-inner-ring sleeve is driven AXIALLY with the proper sleeve/drift until it seats against the abutment — driving at an angle burrs the stepped sleeve and destroys the concentricity advantage; removal needs the matching withdrawal technique, never a puller on the flingers. Sleeve geometry: the ConCentra stepped sleeve occupies the symmetric extension up to the 44.2 mm overall width while the sphered outer ring stays 22 mm wide — uniform sleeve contraction is why run-out stays low at 45 mm bore.", "applications": [ "high-speed textile and processing rollers", "fan and blower positions sensitive to imbalance", "food and packaging conveyors" ], "failure_modes": [ "undersized/over-toleranced shaft never reaches full sleeve grip despite correct drive-up", "puller applied to the sealed outer side during removal destroys flingers and seals instead of releasing the sleeve", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "The SB shortened-inner-ring ConCentra unit needs its matching mounting sleeve and procedure; substituting a standard YSP sleeve or a generic drift is the usual cause of crooked drive-up on the 45 mm shaft.", "ConCentra solves run-out and fretting but not gross misalignment — the housing spherical seat still carries that function; do not use the sleeve grip as an excuse to skip housing alignment.", "Inspect the shaft before sleeve mounting: a single deep keyway burr or old screw-point dimple under the 44.2 mm-wide sleeve causes a local unclamped arc that later frets.", "Catalogue ratings belong to YSP 209 SB-2F as the concentra two f execution; other order numbers of the YSP 209 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSP-209-SB-2F?", "a": "Boundary dimensions: bore 45 mm, sphered OD 85 mm, overall width 44.2 mm; weight 660 g. Loads: dynamic 33.2 kN, static 21.6 kN, fatigue 0.915 kN; the only published speed is the 4,300 r/min limiting value." }, { "q": "What does the designation YSP 209 SB-2F mean?", "a": "YSP denotes the ConCentra design — the SB execution in this chapter has the shortened inner ring; axial driving of the stepped sleeve produces a near-true concentric clamp with virtually no run-out penalty. the size code 209 carries the usual bore arithmetic — 45 mm (code 09 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "When should I choose YSP over YAR or YEL?", "a": "Choose ConCentra for high run-out accuracy, vibrating or reversing shafts, and shafts that must not be marked: fans, vibrating conveyors, sieves and balanced rotors. It needs the correct sleeve and drive procedure rather than simple screw tightening." }, { "q": "What does SB mean in YSP 209 SB-2F?", "a": "SB identifies the ConCentra ball bearing with a shortened inner ring; the overall width is shorter than the non-SB ConCentra design while keeping the concentric sleeve lock and the -2F seal/flinger package." } ], "cross_ref": [ { "equiv_sku": "YSPAG-209", "equiv_brand": "SKF", "level": "full", "note": "Same 45x85x44.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSPAG 209 is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSP-209-SB-2F", "YSP 209 SB-2F" ], "locale_variants": {} }, { "sku": "YSPAG-210", "brand": "SKF", "manufacturer_designation": "YSPAG 210", "series": "YSP2-series", "type": "insert", "d_mm": 50, "D_mm": 90, "B_mm": 46.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 35.1, "static_load_kN": 23.2, "fatigue_load_limit_kN": 0.98, "limiting_speed_rpm": 800, "max_rpm": 800, "weight_g": 720, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YSPAG 210 is SKF's 50 mm-bore SKF ConCentra insert bearing with concentric stepped-sleeve locking and symmetrically extended inner ring in the YSP2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 50x90x46.2 mm. The ConCentra principle replaces point or eccentric clamping: a stepped sleeve between shaft and inner ring is driven axially to contract uniformly, concentric with the sphered-OD sealed ball insert. the YSP prefix names SKF ConCentra locking: a stepped (multi-diameter) sleeve between shaft and inner ring is driven axially to grip concentrically, avoiding the local shaft fretting of set screws or the imbalance of an eccentric collar. the size code 210 carries the usual bore arithmetic — 50 mm (code 10 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. AG marks the agricultural-machinery application execution, built on the sealed both-sides-extended geometry and tuned for the low-speed, shock-laden duty of harvesters, balers and spreaders — note the catalogue prints a much reduced limiting speed for this variant. Envelope 50x90x46.2 mm (1.969x3.543x1.819 in), outer ring 22 mm wide, C 35.1 kN, C0 23.2 kN, Pu 0.98 kN. The catalogue publishes a single speed ceiling, the limiting speed: 800 r/min; mass 720 g. Capacity density: 35.1 kN from 0.720 kg of bearing steel is about 48.75 kN per kilogram, and per width millimetre the 46.2 mm unit carries 0.76 kN of dynamic capacity. Rating split for the maintenance file: dynamic 35.1 kN (L10), static 23.2 kN (s0 shock check), fatigue 0.98 kN (adjusted life) — three separate uses for YSPAG 210, none interchangeable with another. Imperial procurement cross-check: 1.969 in bore, 3.543 in OD, 1.819 in overall width; the 720 g mass converts to 0.720 kg (25.4 oz) for the bill of materials. Speed ceiling of 800 r/min is the catalogue mechanical limit for THIS execution; the AG agricultural derate is deliberate, so real fan duty is planned well below it. Spherical-seat note in numbers: the 90 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 70 = 219.911 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Sleeve geometry: the ConCentra stepped sleeve occupies the symmetric extension up to the 46.2 mm overall width while the sphered outer ring stays 22 mm wide — uniform sleeve contraction is why run-out stays low at 50 mm bore.", "applications": [ "vibrating conveyors and sieves where screws loosen", "fan and blower positions sensitive to imbalance", "high-speed textile and processing rollers" ], "failure_modes": [ "stepped sleeve driven crooked scores the shaft and leaves one clamping arc unloaded", "puller applied to the sealed outer side during removal destroys flingers and seals instead of releasing the sleeve", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "relubricated with incompatible grease that hardens the factory fill and drags the seals" ], "pitfalls": [ "ConCentra solves run-out and fretting but not gross misalignment — the housing spherical seat still carries that function; do not use the sleeve grip as an excuse to skip housing alignment.", "Inspect the shaft before sleeve mounting: a single deep keyway burr or old screw-point dimple under the 46.2 mm-wide sleeve causes a local unclamped arc that later frets.", "The SB shortened-inner-ring ConCentra unit needs its matching mounting sleeve and procedure; substituting a standard YSP sleeve or a generic drift is the usual cause of crooked drive-up on the 50 mm shaft.", "Ordering discipline for the 50 mm size: the chapter lists several executions side by side (YSP2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSPAG-210?", "a": "YSPAG 210 measures 50 mm bore x 90 mm OD x 46.2 mm overall width (outer ring 22 mm wide), 1.969 x 3.543 x 1.819 in; mass about 720 g. SKF 17000 ratings: C 35.1 kN, C0 23.2 kN, Pu 0.98 kN, limiting speed 800 r/min." }, { "q": "What does the designation YSPAG 210 mean?", "a": "the YSP prefix names SKF ConCentra locking: a stepped (multi-diameter) sleeve between shaft and inner ring is driven axially to grip concentrically, avoiding the local shaft fretting of set screws or the imbalance of an eccentric collar. the size code 210 carries the usual bore arithmetic — 50 mm (code 10 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. AG marks the agricultural-machinery application execution, built on the sealed both-sides-extended geometry and tuned for the low-speed, shock-laden duty of harvesters, balers and spreaders — note the catalogue prints a much reduced limiting speed for this variant." }, { "q": "What does SB mean in YSPAG 210?", "a": "SB identifies the ConCentra ball bearing with a shortened inner ring; the overall width is shorter than the non-SB ConCentra design while keeping the concentric sleeve lock and the -2F seal/flinger package." }, { "q": "What is SKF ConCentra locking?", "a": "A stepped (multi-diameter) sleeve between the shaft and the tapered/stepped inner-ring seat is driven axially until it contracts uniformly around the shaft — full-circumference grip, low run-out and no screw-point indentations or eccentric imbalance." } ], "cross_ref": [ { "equiv_sku": "YSP-210-SB-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 50x90x46.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSP 210 SB-2F is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSPAG-210", "YSPAG 210" ], "locale_variants": {} }, { "sku": "YSP-210-SB-2F", "brand": "SKF", "manufacturer_designation": "YSP 210 SB-2F", "series": "YSP2-series", "type": "insert", "d_mm": 50, "D_mm": 90, "B_mm": 46.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 35.1, "static_load_kN": 23.2, "fatigue_load_limit_kN": 0.98, "limiting_speed_rpm": 4000, "max_rpm": 4000, "weight_g": 740, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YSP2 series order number YSP 210 SB-2F is a SKF insert bearing (Y-bearing) for a 50 mm shaft: SKF ConCentra insert bearing with concentric stepped-sleeve locking and symmetrically extended inner ring, built to the ISO 15 diameter-series envelope with a sphered OD of 90 mm. Inside is a capped ball insert whose extended inner ring tapers onto a multi-step locking sleeve; the sleeve grips the shaft around its full circumference and the spherical outer ring pivots in the housing. YSP denotes the ConCentra design — the SB execution in this chapter has the shortened inner ring; axial driving of the stepped sleeve produces a near-true concentric clamp with virtually no run-out penalty. the size code 210 carries the usual bore arithmetic — 50 mm (code 10 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 50x90x46.2 mm (1.969x3.543x1.819 in), outer ring 22 mm wide, C 35.1 kN, C0 23.2 kN, Pu 0.98 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,000 r/min; mass 740 g. Rating split for the maintenance file: dynamic 35.1 kN (L10), static 23.2 kN (s0 shock check), fatigue 0.98 kN (adjusted life) — three separate uses for YSP 210 SB-2F, none interchangeable with another. Pitch-diameter arithmetic: dm = (50+90)/2 = 70 mm; at the 4,000 r/min limiting speed the ball set runs at dn approx 2.80x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Static-first planning: the 0.502 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 50 mm shaft, not the 35.1 kN L10 value. The s1 27.7 mm dimension is printed for the locking zone — the pre-drive position of the ConCentra stepped sleeve — and it is verified at mounting, not recoverable from d/D/B alone. Envelope arithmetic: the radial section from 50 mm bore to 90 mm OD is 20 mm; dividing C 35.1 kN by that section gives 1.755 kN per section millimetre, and the 46.2 mm overall width is 2.31x the section. ConCentra mounting note: the SB shortened-inner-ring sleeve is driven AXIALLY with the proper sleeve/drift until it seats against the abutment — driving at an angle burrs the stepped sleeve and destroys the concentricity advantage; removal needs the matching withdrawal technique, never a puller on the flingers. Reuse note for YSP-210-SB-2F: the stepped locking sleeve is a one-time clamping component in most over-torque cases; if the 50 mm shaft shows a polished sleeve imprint after withdrawal, fit a new sleeve rather than re-driving the old one.", "applications": [ "fan and blower positions sensitive to imbalance", "food and packaging conveyors", "vibrating conveyors and sieves where screws loosen" ], "failure_modes": [ "puller applied to the sealed outer side during removal destroys flingers and seals instead of releasing the sleeve", "sleeve re-driven after a first seating without cleaning gives false drive-up and creep under load", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "Inspect the shaft before sleeve mounting: a single deep keyway burr or old screw-point dimple under the 46.2 mm-wide sleeve causes a local unclamped arc that later frets.", "ConCentra solves run-out and fretting but not gross misalignment — the housing spherical seat still carries that function; do not use the sleeve grip as an excuse to skip housing alignment.", "The SB shortened-inner-ring ConCentra unit needs its matching mounting sleeve and procedure; substituting a standard YSP sleeve or a generic drift is the usual cause of crooked drive-up on the 50 mm shaft.", "The 35.1/23.2 kN figures belong specifically to YSP 210 SB-2F; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSP-210-SB-2F?", "a": "Boundary dimensions: bore 50 mm, sphered OD 90 mm, overall width 46.2 mm; weight 740 g. Loads: dynamic 35.1 kN, static 23.2 kN, fatigue 0.98 kN; the only published speed is the 4,000 r/min limiting value." }, { "q": "What does the designation YSP 210 SB-2F mean?", "a": "YSP denotes the ConCentra design — the SB execution in this chapter has the shortened inner ring; axial driving of the stepped sleeve produces a near-true concentric clamp with virtually no run-out penalty. the size code 210 carries the usual bore arithmetic — 50 mm (code 10 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "What is SKF ConCentra locking?", "a": "A stepped (multi-diameter) sleeve between the shaft and the tapered/stepped inner-ring seat is driven axially until it contracts uniformly around the shaft — full-circumference grip, low run-out and no screw-point indentations or eccentric imbalance." }, { "q": "Can the locking sleeve be reused?", "a": "Usually not after a full service life or an over-torqued first mounting: the stepped sleeve takes a permanent set. SKF recommends a new sleeve whenever the bearing is replaced on the same shaft." } ], "cross_ref": [ { "equiv_sku": "YSPAG-210", "equiv_brand": "SKF", "level": "full", "note": "Same 50x90x46.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSPAG 210 is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSP-210-SB-2F", "YSP 210 SB-2F" ], "locale_variants": {} }, { "sku": "YSP-211-SB-2F", "brand": "SKF", "manufacturer_designation": "YSP 211 SB-2F", "series": "YSP2-series", "type": "insert", "d_mm": 55, "D_mm": 100, "B_mm": 49.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 43.6, "static_load_kN": 29, "fatigue_load_limit_kN": 1.25, "limiting_speed_rpm": 3600, "max_rpm": 3600, "weight_g": 980, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YSP2 series order number YSP 211 SB-2F is a SKF insert bearing (Y-bearing) for a 55 mm shaft: SKF ConCentra insert bearing with concentric stepped-sleeve locking and symmetrically extended inner ring, built to the ISO 15 diameter-series envelope with a sphered OD of 100 mm. Inside is a capped ball insert whose extended inner ring tapers onto a multi-step locking sleeve; the sleeve grips the shaft around its full circumference and the spherical outer ring pivots in the housing. YSP denotes the ConCentra design — the SB execution in this chapter has the shortened inner ring; axial driving of the stepped sleeve produces a near-true concentric clamp with virtually no run-out penalty. the size code 211 carries the usual bore arithmetic — 55 mm (code 11 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 55x100x49.2 mm (2.165x3.937x1.937 in), outer ring 25 mm wide, C 43.6 kN, C0 29 kN, Pu 1.25 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,600 r/min; mass 980 g. Width accounting on this execution: 49.2 mm overall and 25 mm outer-ring width leave the housing designer 24.2 mm of inner-ring projection to accommodate the locking arrangement. Fatigue-limit check: Pu 1.25 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YSP 211 SB-2F — most belt-driven mounted-unit loads sit comfortably under 2.867 % of C. Outer-vs-overall width: the outer ring is 25 mm wide inside the 49.2 mm total, so the extended inner ring accounts for 0.492 of the overall width (12.1 mm of axial projection per side). Spherical-seat note in numbers: the 100 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 77.5 = 243.473 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Rating split for the maintenance file: dynamic 43.6 kN (L10), static 29 kN (s0 shock check), fatigue 1.25 kN (adjusted life) — three separate uses for YSP 211 SB-2F, none interchangeable with another. ConCentra mounting note: the SB shortened-inner-ring sleeve is driven AXIALLY with the proper sleeve/drift until it seats against the abutment — driving at an angle burrs the stepped sleeve and destroys the concentricity advantage; removal needs the matching withdrawal technique, never a puller on the flingers. Sleeve geometry: the ConCentra stepped sleeve occupies the symmetric extension up to the 49.2 mm overall width while the sphered outer ring stays 25 mm wide — uniform sleeve contraction is why run-out stays low at 55 mm bore.", "applications": [ "vibrating conveyors and sieves where screws loosen", "high-speed textile and processing rollers", "fan and blower positions sensitive to imbalance" ], "failure_modes": [ "stepped sleeve driven crooked scores the shaft and leaves one clamping arc unloaded", "undersized/over-toleranced shaft never reaches full sleeve grip despite correct drive-up", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "Inspect the shaft before sleeve mounting: a single deep keyway burr or old screw-point dimple under the 49.2 mm-wide sleeve causes a local unclamped arc that later frets.", "ConCentra solves run-out and fretting but not gross misalignment — the housing spherical seat still carries that function; do not use the sleeve grip as an excuse to skip housing alignment.", "The SB shortened-inner-ring ConCentra unit needs its matching mounting sleeve and procedure; substituting a standard YSP sleeve or a generic drift is the usual cause of crooked drive-up on the 55 mm shaft.", "The 43.6/29 kN figures belong specifically to YSP 211 SB-2F; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSP-211-SB-2F?", "a": "Boundary dimensions: bore 55 mm, sphered OD 100 mm, overall width 49.2 mm; weight 980 g. Loads: dynamic 43.6 kN, static 29 kN, fatigue 1.25 kN; the only published speed is the 3,600 r/min limiting value." }, { "q": "What does the designation YSP 211 SB-2F mean?", "a": "YSP denotes the ConCentra design — the SB execution in this chapter has the shortened inner ring; axial driving of the stepped sleeve produces a near-true concentric clamp with virtually no run-out penalty. the size code 211 carries the usual bore arithmetic — 55 mm (code 11 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "Can the locking sleeve be reused?", "a": "Usually not after a full service life or an over-torqued first mounting: the stepped sleeve takes a permanent set. SKF recommends a new sleeve whenever the bearing is replaced on the same shaft." }, { "q": "When should I choose YSP over YAR or YEL?", "a": "Choose ConCentra for high run-out accuracy, vibrating or reversing shafts, and shafts that must not be marked: fans, vibrating conveyors, sieves and balanced rotors. It needs the correct sleeve and drive procedure rather than simple screw tightening." } ], "cross_ref": [ { "equiv_sku": "YSP", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSP-211-SB-2F", "YSP 211 SB-2F" ], "locale_variants": {} }, { "sku": "YSP-212-SB-2F", "brand": "SKF", "manufacturer_designation": "YSP 212 SB-2F", "series": "YSP2-series", "type": "insert", "d_mm": 60, "D_mm": 110, "B_mm": 51.7, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 52.7, "static_load_kN": 36, "fatigue_load_limit_kN": 1.53, "limiting_speed_rpm": 3400, "max_rpm": 3400, "weight_g": 1250, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YSP2 series order number YSP 212 SB-2F is a SKF insert bearing (Y-bearing) for a 60 mm shaft: SKF ConCentra insert bearing with concentric stepped-sleeve locking and symmetrically extended inner ring, built to the ISO 15 diameter-series envelope with a sphered OD of 110 mm. Inside is a capped ball insert whose extended inner ring tapers onto a multi-step locking sleeve; the sleeve grips the shaft around its full circumference and the spherical outer ring pivots in the housing. YSP denotes the ConCentra design — the SB execution in this chapter has the shortened inner ring; axial driving of the stepped sleeve produces a near-true concentric clamp with virtually no run-out penalty. the size code 212 carries the usual bore arithmetic — 60 mm (code 12 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 60x110x51.7 mm (2.362x4.331x2.035 in), outer ring 26 mm wide, C 52.7 kN, C0 36 kN, Pu 1.53 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,400 r/min; mass 1250 g. Bore-to-OD planning: OD 110 over bore 60 is a 1.833x step, while bore/overall-width gives 1.161; the spherical seat in the matching Y-housing must be specified to the 110 mm OD, not to a cylindrical housing bore. The s1 30.5 mm dimension is printed for the locking zone — the pre-drive position of the ConCentra stepped sleeve — and it is verified at mounting, not recoverable from d/D/B alone. At the printed limiting speed of 3,400 r/min the mean diameter dm = 85 mm implies dn about 2.89x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Fillet discipline: the printed minimum-fillet limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 60x110 mm insert on its chamfer tilts the whole spherical seat. Speed ceiling of 3,400 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. ConCentra mounting note: the SB shortened-inner-ring sleeve is driven AXIALLY with the proper sleeve/drift until it seats against the abutment — driving at an angle burrs the stepped sleeve and destroys the concentricity advantage; removal needs the matching withdrawal technique, never a puller on the flingers. Sleeve geometry: the ConCentra stepped sleeve occupies the symmetric extension up to the 51.7 mm overall width while the sphered outer ring stays 26 mm wide — uniform sleeve contraction is why run-out stays low at 60 mm bore.", "applications": [ "heavily vibrating screen and feeder shafts", "large fan positions with dynamic balancing requirements", "process-industry roller beds" ], "failure_modes": [ "sleeve re-driven after a first seating without cleaning gives false drive-up and creep under load", "undersized/over-toleranced shaft never reaches full sleeve grip despite correct drive-up", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "relubricated with incompatible grease that hardens the factory fill and drags the seals" ], "pitfalls": [ "ConCentra solves run-out and fretting but not gross misalignment — the housing spherical seat still carries that function; do not use the sleeve grip as an excuse to skip housing alignment.", "The SB shortened-inner-ring ConCentra unit needs its matching mounting sleeve and procedure; substituting a standard YSP sleeve or a generic drift is the usual cause of crooked drive-up on the 60 mm shaft.", "Inspect the shaft before sleeve mounting: a single deep keyway burr or old screw-point dimple under the 51.7 mm-wide sleeve causes a local unclamped arc that later frets.", "Ordering discipline for the 60 mm size: the chapter lists several executions side by side (YSP2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSP-212-SB-2F?", "a": "Boundary dimensions: bore 60 mm, sphered OD 110 mm, overall width 51.7 mm; weight 1250 g. Loads: dynamic 52.7 kN, static 36 kN, fatigue 1.53 kN; the only published speed is the 3,400 r/min limiting value." }, { "q": "What does the designation YSP 212 SB-2F mean?", "a": "YSP denotes the ConCentra design — the SB execution in this chapter has the shortened inner ring; axial driving of the stepped sleeve produces a near-true concentric clamp with virtually no run-out penalty. the size code 212 carries the usual bore arithmetic — 60 mm (code 12 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "When should I choose YSP over YAR or YEL?", "a": "Choose ConCentra for high run-out accuracy, vibrating or reversing shafts, and shafts that must not be marked: fans, vibrating conveyors, sieves and balanced rotors. It needs the correct sleeve and drive procedure rather than simple screw tightening." }, { "q": "What does SB mean in YSP 212 SB-2F?", "a": "SB identifies the ConCentra ball bearing with a shortened inner ring; the overall width is shorter than the non-SB ConCentra design while keeping the concentric sleeve lock and the -2F seal/flinger package." } ], "cross_ref": [ { "equiv_sku": "YSP", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSP-212-SB-2F", "YSP 212 SB-2F" ], "locale_variants": {} }, { "sku": "YSPAG-205-100", "brand": "SKF", "manufacturer_designation": "YSPAG 205-100", "series": "YSP2-series", "type": "insert", "d_mm": 25.4, "D_mm": 52, "B_mm": 33.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 14, "static_load_kN": 7.8, "fatigue_load_limit_kN": 0.335, "limiting_speed_rpm": 1500, "max_rpm": 1500, "weight_g": 180, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YSPAG 205-100 is a SKF ConCentra insert bearing with concentric stepped-sleeve locking and symmetrically extended inner ring, 25.4x52x33.2 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction is a sealed deep-groove insert, a symmetrically extended inner ring and the stepped ConCentra sleeve — uniform grip, minimal run-out, no shaft damage from screw points or an eccentric mass. reading YSP: SKF ConCentra technology locks the shaft through a stepped sleeve that contracts uniformly, chosen for high run-out accuracy and for shafts that must not be marked by screw points or an eccentric. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -100 = 25.4 mm, which is why this row sits beside, not on, the metric bore size. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery. Envelope 25.4x52x33.2 mm (1x2.047x1.307 in), outer ring 15 mm wide, C 14 kN, C0 7.8 kN, Pu 0.335 kN. The catalogue publishes a single speed ceiling, the limiting speed: 1,500 r/min; mass 180 g. Envelope arithmetic: the radial section from 25.4 mm bore to 52 mm OD is 13.3 mm; dividing C 14 kN by that section gives 1.053 kN per section millimetre, and the 33.2 mm overall width is 2.496x the section. Selection figures for YSPAG 205-100: C0/C is 0.557, Pu 0.335 kN is 2.393 % of the 14 kN dynamic rating, and the 180 g catalogue mass works out to roughly 7.087 g per millimetre of the 25.4 mm bore. Pitch-diameter arithmetic: dm = (25.4+52)/2 = 38.7 mm; at the 1,500 r/min limiting speed the ball set runs at dn approx 0.58x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Mass-to-load ratio for YSPAG-205-100: 12.857 g of catalogue mass per rated kN of C, and 7.087 g per millimetre of bore — useful when comparing executions of the same 25.4x52 mm envelope on the drawing. At the printed limiting speed of 1,500 r/min the mean diameter dm = 38.7 mm implies dn about 0.58x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Reuse note for YSPAG-205-100: the stepped locking sleeve is a one-time clamping component in most over-torque cases; if the 25.4 mm shaft shows a polished sleeve imprint after withdrawal, fit a new sleeve rather than re-driving the old one.", "applications": [ "food and packaging conveyors", "fan and blower positions sensitive to imbalance", "vibrating conveyors and sieves where screws loosen" ], "failure_modes": [ "sleeve re-driven after a first seating without cleaning gives false drive-up and creep under load", "puller applied to the sealed outer side during removal destroys flingers and seals instead of releasing the sleeve", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "ConCentra solves run-out and fretting but not gross misalignment — the housing spherical seat still carries that function; do not use the sleeve grip as an excuse to skip housing alignment.", "The SB shortened-inner-ring ConCentra unit needs its matching mounting sleeve and procedure; substituting a standard YSP sleeve or a generic drift is the usual cause of crooked drive-up on the 25.4 mm shaft.", "Inspect the shaft before sleeve mounting: a single deep keyway burr or old screw-point dimple under the 33.2 mm-wide sleeve causes a local unclamped arc that later frets.", "Ordering discipline for the 25.4 mm size: the chapter lists several executions side by side (YSP2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSPAG-205-100?", "a": "The catalogue envelope is 25.4x52x33.2 mm with a spherical outside surface; mass 180 g. Ratings C 14/7.8 kN, Pu 0.335 kN, limiting speed 1,500 r/min." }, { "q": "What does the designation YSPAG 205-100 mean?", "a": "reading YSP: SKF ConCentra technology locks the shaft through a stepped sleeve that contracts uniformly, chosen for high run-out accuracy and for shafts that must not be marked by screw points or an eccentric. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -100 = 25.4 mm, which is why this row sits beside, not on, the metric bore size. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery." }, { "q": "What does SB mean in YSPAG 205-100?", "a": "SB identifies the ConCentra ball bearing with a shortened inner ring; the overall width is shorter than the non-SB ConCentra design while keeping the concentric sleeve lock and the -2F seal/flinger package." }, { "q": "What is SKF ConCentra locking?", "a": "A stepped (multi-diameter) sleeve between the shaft and the tapered/stepped inner-ring seat is driven axially until it contracts uniformly around the shaft — full-circumference grip, low run-out and no screw-point indentations or eccentric imbalance." } ], "cross_ref": [ { "equiv_sku": "YSPAG-205", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x33.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSPAG 205 is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YSP-205-SB-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x33.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSP 205 SB-2F is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YSP-205-100-SB-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x33.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSP 205-100 SB-2F is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSPAG-205-100", "YSPAG 205-100" ], "locale_variants": {} }, { "sku": "YSP-205-100-SB-2F", "brand": "SKF", "manufacturer_designation": "YSP 205-100 SB-2F", "series": "YSP2-series", "type": "insert", "d_mm": 25.4, "D_mm": 52, "B_mm": 33.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 14, "static_load_kN": 7.8, "fatigue_load_limit_kN": 0.335, "limiting_speed_rpm": 7000, "max_rpm": 7000, "weight_g": 180, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YSP 205-100 SB-2F is a SKF ConCentra insert bearing with concentric stepped-sleeve locking and symmetrically extended inner ring, 25.4x52x33.2 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction is a sealed deep-groove insert, a symmetrically extended inner ring and the stepped ConCentra sleeve — uniform grip, minimal run-out, no shaft damage from screw points or an eccentric mass. reading YSP: SKF ConCentra technology locks the shaft through a stepped sleeve that contracts uniformly, chosen for high run-out accuracy and for shafts that must not be marked by screw points or an eccentric. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -100 = 25.4 mm, which is why this row sits beside, not on, the metric bore size. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution. Envelope 25.4x52x33.2 mm (1x2.047x1.307 in), outer ring 15 mm wide, C 14 kN, C0 7.8 kN, Pu 0.335 kN. The catalogue publishes a single speed ceiling, the limiting speed: 7,000 r/min; mass 180 g. Selection figures for YSP 205-100 SB-2F: C0/C is 0.557, Pu 0.335 kN is 2.393 % of the 14 kN dynamic rating, and the 180 g catalogue mass works out to roughly 7.087 g per millimetre of the 25.4 mm bore. Envelope arithmetic: the radial section from 25.4 mm bore to 52 mm OD is 13.3 mm; dividing C 14 kN by that section gives 1.053 kN per section millimetre, and the 33.2 mm overall width is 2.496x the section. Mass-to-load ratio for YSP-205-100-SB-2F: 12.857 g of catalogue mass per rated kN of C, and 7.087 g per millimetre of bore — useful when comparing executions of the same 25.4x52 mm envelope on the drawing. Spherical-seat note in numbers: the 52 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 38.7 = 121.58 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Pitch-diameter arithmetic: dm = (25.4+52)/2 = 38.7 mm; at the 7,000 r/min limiting speed the ball set runs at dn approx 2.71x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. ConCentra mounting note: the SB shortened-inner-ring sleeve is driven AXIALLY with the proper sleeve/drift until it seats against the abutment — driving at an angle burrs the stepped sleeve and destroys the concentricity advantage; removal needs the matching withdrawal technique, never a puller on the flingers. Reuse note for YSP-205-100-SB-2F: the stepped locking sleeve is a one-time clamping component in most over-torque cases; if the 25.4 mm shaft shows a polished sleeve imprint after withdrawal, fit a new sleeve rather than re-driving the old one.", "applications": [ "vibrating conveyors and sieves where screws loosen", "food and packaging conveyors", "high-speed textile and processing rollers" ], "failure_modes": [ "stepped sleeve driven crooked scores the shaft and leaves one clamping arc unloaded", "sleeve re-driven after a first seating without cleaning gives false drive-up and creep under load", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "Inspect the shaft before sleeve mounting: a single deep keyway burr or old screw-point dimple under the 33.2 mm-wide sleeve causes a local unclamped arc that later frets.", "The SB shortened-inner-ring ConCentra unit needs its matching mounting sleeve and procedure; substituting a standard YSP sleeve or a generic drift is the usual cause of crooked drive-up on the 25.4 mm shaft.", "ConCentra solves run-out and fretting but not gross misalignment — the housing spherical seat still carries that function; do not use the sleeve grip as an excuse to skip housing alignment.", "The 14/7.8 kN figures belong specifically to YSP 205-100 SB-2F; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSP-205-100-SB-2F?", "a": "The catalogue envelope is 25.4x52x33.2 mm with a spherical outside surface; mass 180 g. Ratings C 14/7.8 kN, Pu 0.335 kN, limiting speed 7,000 r/min." }, { "q": "What does the designation YSP 205-100 SB-2F mean?", "a": "reading YSP: SKF ConCentra technology locks the shaft through a stepped sleeve that contracts uniformly, chosen for high run-out accuracy and for shafts that must not be marked by screw points or an eccentric. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -100 = 25.4 mm, which is why this row sits beside, not on, the metric bore size. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution." }, { "q": "What is SKF ConCentra locking?", "a": "A stepped (multi-diameter) sleeve between the shaft and the tapered/stepped inner-ring seat is driven axially until it contracts uniformly around the shaft — full-circumference grip, low run-out and no screw-point indentations or eccentric imbalance." }, { "q": "Can the locking sleeve be reused?", "a": "Usually not after a full service life or an over-torqued first mounting: the stepped sleeve takes a permanent set. SKF recommends a new sleeve whenever the bearing is replaced on the same shaft." } ], "cross_ref": [ { "equiv_sku": "YSPAG-205", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x33.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSPAG 205 is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YSP-205-SB-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x33.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSP 205 SB-2F is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YSPAG-205-100", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x52x33.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSPAG 205-100 is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSP-205-100-SB-2F", "YSP 205-100 SB-2F" ], "locale_variants": {} }, { "sku": "YSPAG-206-103", "brand": "SKF", "manufacturer_designation": "YSPAG 206-103", "series": "YSP2-series", "type": "insert", "d_mm": 30.162499999999998, "D_mm": 62, "B_mm": 37.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 19.5, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 1200, "max_rpm": 1200, "weight_g": 300, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YSP2 series order number YSPAG 206-103 is a SKF insert bearing (Y-bearing) for a 30.162499999999998 mm (1.188 in) shaft: SKF ConCentra insert bearing with concentric stepped-sleeve locking and symmetrically extended inner ring, built to the ISO 15 diameter-series envelope with a sphered OD of 62 mm. Inside is a capped ball insert whose extended inner ring tapers onto a multi-step locking sleeve; the sleeve grips the shaft around its full circumference and the spherical outer ring pivots in the housing. YSP denotes the ConCentra design — the SB execution in this chapter has the shortened inner ring; axial driving of the stepped sleeve produces a near-true concentric clamp with virtually no run-out penalty. inch bore code -103 decodes as 1\" +3/16, i.e. 30.162 mm; the metric coded size YSPAG 206 shares the same envelope but its bore is the metric value, not this one. the AG suffix identifies the farm-duty variant of the range: sealed and flinger-protected for chaff and dust, with the catalogue deliberately derating its permissible speed versus the industrial execution. Envelope 30.162499999999998x62x37.2 mm (1.188x2.441x1.465 in), outer ring 18 mm wide, C 19.5 kN, C0 11.2 kN, Pu 0.475 kN. The catalogue publishes a single speed ceiling, the limiting speed: 1,200 r/min; mass 300 g. At the printed limiting speed of 1,200 r/min the mean diameter dm = 46.081 mm implies dn about 0.55x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Speed ceiling of 1,200 r/min is the catalogue mechanical limit for THIS execution; the AG agricultural derate is deliberate, so real fan duty is planned well below it. Selection figures for YSPAG 206-103: C0/C is 0.574, Pu 0.475 kN is 2.436 % of the 19.5 kN dynamic rating, and the 300 g catalogue mass works out to roughly 9.946 g per millimetre of the 30.162499999999998 mm bore. Spherical-seat note in numbers: the 62 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 46.081 = 144.768 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Outer-vs-overall width: the outer ring is 18 mm wide inside the 37.2 mm total, so the extended inner ring accounts for 0.516 of the overall width (9.6 mm of axial projection per side). Sleeve geometry: the ConCentra stepped sleeve occupies the symmetric extension up to the 37.2 mm overall width while the sphered outer ring stays 18 mm wide — uniform sleeve contraction is why run-out stays low at 30.162499999999998 mm bore.", "applications": [ "fan and blower positions sensitive to imbalance", "food and packaging conveyors", "vibrating conveyors and sieves where screws loosen" ], "failure_modes": [ "puller applied to the sealed outer side during removal destroys flingers and seals instead of releasing the sleeve", "sleeve re-driven after a first seating without cleaning gives false drive-up and creep under load", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "The SB shortened-inner-ring ConCentra unit needs its matching mounting sleeve and procedure; substituting a standard YSP sleeve or a generic drift is the usual cause of crooked drive-up on the 30.162499999999998 mm shaft.", "Inspect the shaft before sleeve mounting: a single deep keyway burr or old screw-point dimple under the 37.2 mm-wide sleeve causes a local unclamped arc that later frets.", "ConCentra solves run-out and fretting but not gross misalignment — the housing spherical seat still carries that function; do not use the sleeve grip as an excuse to skip housing alignment.", "Catalogue ratings belong to YSPAG 206-103 as the concentra two ag execution; other order numbers of the YSPAG 206-103 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSPAG-206-103?", "a": "Boundary dimensions: bore 30.162499999999998 mm, sphered OD 62 mm, overall width 37.2 mm; weight 300 g. Loads: dynamic 19.5 kN, static 11.2 kN, fatigue 0.475 kN; the only published speed is the 1,200 r/min limiting value." }, { "q": "What does the designation YSPAG 206-103 mean?", "a": "YSP denotes the ConCentra design — the SB execution in this chapter has the shortened inner ring; axial driving of the stepped sleeve produces a near-true concentric clamp with virtually no run-out penalty. inch bore code -103 decodes as 1\" +3/16, i.e. 30.162 mm; the metric coded size YSPAG 206 shares the same envelope but its bore is the metric value, not this one. the AG suffix identifies the farm-duty variant of the range: sealed and flinger-protected for chaff and dust, with the catalogue deliberately derating its permissible speed versus the industrial execution." }, { "q": "What does SB mean in YSPAG 206-103?", "a": "SB identifies the ConCentra ball bearing with a shortened inner ring; the overall width is shorter than the non-SB ConCentra design while keeping the concentric sleeve lock and the -2F seal/flinger package." }, { "q": "What is SKF ConCentra locking?", "a": "A stepped (multi-diameter) sleeve between the shaft and the tapered/stepped inner-ring seat is driven axially until it contracts uniformly around the shaft — full-circumference grip, low run-out and no screw-point indentations or eccentric imbalance." } ], "cross_ref": [ { "equiv_sku": "YSPAG-206", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x37.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSPAG 206 is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YSP-206-SB-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x37.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSP 206 SB-2F is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YSP-206-103-SB-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x37.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSP 206-103 SB-2F is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSPAG-206-103", "YSPAG 206-103" ], "locale_variants": {} }, { "sku": "YSP-206-103-SB-2F", "brand": "SKF", "manufacturer_designation": "YSP 206-103 SB-2F", "series": "YSP2-series", "type": "insert", "d_mm": 30.162499999999998, "D_mm": 62, "B_mm": 37.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 19.5, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 6300, "max_rpm": 6300, "weight_g": 300, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YSP 206-103 SB-2F is SKF's 30.162499999999998 mm-bore SKF ConCentra insert bearing with concentric stepped-sleeve locking and symmetrically extended inner ring in the YSP2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 30.162499999999998x62x37.2 mm. The ConCentra principle replaces point or eccentric clamping: a stepped sleeve between shaft and inner ring is driven axially to contract uniformly, concentric with the sphered-OD sealed ball insert. the YSP prefix names SKF ConCentra locking: a stepped (multi-diameter) sleeve between shaft and inner ring is driven axially to grip concentrically, avoiding the local shaft fretting of set screws or the imbalance of an eccentric collar. the three-digit -103 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 3/16 in = 30.162 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 30.162499999999998x62x37.2 mm (1.188x2.441x1.465 in), outer ring 18 mm wide, C 19.5 kN, C0 11.2 kN, Pu 0.475 kN. The catalogue publishes a single speed ceiling, the limiting speed: 6,300 r/min; mass 300 g. Outer-vs-overall width: the outer ring is 18 mm wide inside the 37.2 mm total, so the extended inner ring accounts for 0.516 of the overall width (9.6 mm of axial projection per side). Fillet discipline: the printed minimum-fillet limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 30.162499999999998x62 mm insert on its chamfer tilts the whole spherical seat. Mass-to-load ratio for YSP-206-103-SB-2F: 15.385 g of catalogue mass per rated kN of C, and 9.946 g per millimetre of bore — useful when comparing executions of the same 30.162499999999998x62 mm envelope on the drawing. Load balance for documentation: C0 11.2 kN against C 19.5 kN gives a 0.574 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Selection figures for YSP 206-103 SB-2F: C0/C is 0.574, Pu 0.475 kN is 2.436 % of the 19.5 kN dynamic rating, and the 300 g catalogue mass works out to roughly 9.946 g per millimetre of the 30.162499999999998 mm bore. ConCentra mounting note: the SB shortened-inner-ring sleeve is driven AXIALLY with the proper sleeve/drift until it seats against the abutment — driving at an angle burrs the stepped sleeve and destroys the concentricity advantage; removal needs the matching withdrawal technique, never a puller on the flingers. Reuse note for YSP-206-103-SB-2F: the stepped locking sleeve is a one-time clamping component in most over-torque cases; if the 30.162499999999998 mm shaft shows a polished sleeve imprint after withdrawal, fit a new sleeve rather than re-driving the old one.", "applications": [ "vibrating conveyors and sieves where screws loosen", "food and packaging conveyors", "high-speed textile and processing rollers" ], "failure_modes": [ "stepped sleeve driven crooked scores the shaft and leaves one clamping arc unloaded", "sleeve re-driven after a first seating without cleaning gives false drive-up and creep under load", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "Inspect the shaft before sleeve mounting: a single deep keyway burr or old screw-point dimple under the 37.2 mm-wide sleeve causes a local unclamped arc that later frets.", "ConCentra solves run-out and fretting but not gross misalignment — the housing spherical seat still carries that function; do not use the sleeve grip as an excuse to skip housing alignment.", "The SB shortened-inner-ring ConCentra unit needs its matching mounting sleeve and procedure; substituting a standard YSP sleeve or a generic drift is the usual cause of crooked drive-up on the 30.162499999999998 mm shaft.", "The 19.5/11.2 kN figures belong specifically to YSP 206-103 SB-2F; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSP-206-103-SB-2F?", "a": "YSP 206-103 SB-2F measures 30.162499999999998 mm bore x 62 mm OD x 37.2 mm overall width (outer ring 18 mm wide), 1.188 x 2.441 x 1.465 in; mass about 300 g. SKF 17000 ratings: C 19.5 kN, C0 11.2 kN, Pu 0.475 kN, limiting speed 6,300 r/min." }, { "q": "What does the designation YSP 206-103 SB-2F mean?", "a": "the YSP prefix names SKF ConCentra locking: a stepped (multi-diameter) sleeve between shaft and inner ring is driven axially to grip concentrically, avoiding the local shaft fretting of set screws or the imbalance of an eccentric collar. the three-digit -103 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 3/16 in = 30.162 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "What is SKF ConCentra locking?", "a": "A stepped (multi-diameter) sleeve between the shaft and the tapered/stepped inner-ring seat is driven axially until it contracts uniformly around the shaft — full-circumference grip, low run-out and no screw-point indentations or eccentric imbalance." }, { "q": "Can the locking sleeve be reused?", "a": "Usually not after a full service life or an over-torqued first mounting: the stepped sleeve takes a permanent set. SKF recommends a new sleeve whenever the bearing is replaced on the same shaft." } ], "cross_ref": [ { "equiv_sku": "YSPAG-206", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x37.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSPAG 206 is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YSP-206-SB-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x37.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSP 206 SB-2F is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30.162499999999998 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YSPAG-206-103", "equiv_brand": "SKF", "level": "full", "note": "Same 30.162499999999998x62x37.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSPAG 206-103 is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSP-206-103-SB-2F", "YSP 206-103 SB-2F" ], "locale_variants": {} }, { "sku": "YSPAG-207-104", "brand": "SKF", "manufacturer_designation": "YSPAG 207-104", "series": "YSP2-series", "type": "insert", "d_mm": 31.75, "D_mm": 72, "B_mm": 39.7, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 1100, "max_rpm": 1100, "weight_g": 490, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YSPAG 207-104 is SKF's 31.75 mm-bore SKF ConCentra insert bearing with concentric stepped-sleeve locking and symmetrically extended inner ring in the YSP2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 31.75x72x39.7 mm. The ConCentra principle replaces point or eccentric clamping: a stepped sleeve between shaft and inner ring is driven axially to contract uniformly, concentric with the sphered-OD sealed ball insert. the YSP prefix names SKF ConCentra locking: a stepped (multi-diameter) sleeve between shaft and inner ring is driven axially to grip concentrically, avoiding the local shaft fretting of set screws or the imbalance of an eccentric collar. the three-digit -104 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 4/16 in = 31.75 mm (first digit whole inches, next two sixteenths of an inch). AG marks the agricultural-machinery application execution, built on the sealed both-sides-extended geometry and tuned for the low-speed, shock-laden duty of harvesters, balers and spreaders — note the catalogue prints a much reduced limiting speed for this variant. Envelope 31.75x72x39.7 mm (1.25x2.835x1.563 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. The catalogue publishes a single speed ceiling, the limiting speed: 1,100 r/min; mass 490 g. Load balance for documentation: C0 15.3 kN against C 25.5 kN gives a 0.6 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Fatigue-limit check: Pu 0.655 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YSPAG 207-104 — most belt-driven mounted-unit loads sit comfortably under 2.569 % of C. Mass-to-load ratio for YSPAG-207-104: 19.216 g of catalogue mass per rated kN of C, and 15.433 g per millimetre of bore — useful when comparing executions of the same 31.75x72 mm envelope on the drawing. Pitch-diameter arithmetic: dm = (31.75+72)/2 = 51.875 mm; at the 1,100 r/min limiting speed the ball set runs at dn approx 0.57x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Speed ceiling of 1,100 r/min is the catalogue mechanical limit for THIS execution; the AG agricultural derate is deliberate, so real fan duty is planned well below it. Reuse note for YSPAG-207-104: the stepped locking sleeve is a one-time clamping component in most over-torque cases; if the 31.75 mm shaft shows a polished sleeve imprint after withdrawal, fit a new sleeve rather than re-driving the old one.", "applications": [ "high-speed textile and processing rollers", "vibrating conveyors and sieves where screws loosen", "fan and blower positions sensitive to imbalance" ], "failure_modes": [ "undersized/over-toleranced shaft never reaches full sleeve grip despite correct drive-up", "stepped sleeve driven crooked scores the shaft and leaves one clamping arc unloaded", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "ConCentra solves run-out and fretting but not gross misalignment — the housing spherical seat still carries that function; do not use the sleeve grip as an excuse to skip housing alignment.", "The SB shortened-inner-ring ConCentra unit needs its matching mounting sleeve and procedure; substituting a standard YSP sleeve or a generic drift is the usual cause of crooked drive-up on the 31.75 mm shaft.", "Inspect the shaft before sleeve mounting: a single deep keyway burr or old screw-point dimple under the 39.7 mm-wide sleeve causes a local unclamped arc that later frets.", "Ordering discipline for the 31.75 mm size: the chapter lists several executions side by side (YSP2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSPAG-207-104?", "a": "YSPAG 207-104 measures 31.75 mm bore x 72 mm OD x 39.7 mm overall width (outer ring 19 mm wide), 1.25 x 2.835 x 1.563 in; mass about 490 g. SKF 17000 ratings: C 25.5 kN, C0 15.3 kN, Pu 0.655 kN, limiting speed 1,100 r/min." }, { "q": "What does the designation YSPAG 207-104 mean?", "a": "the YSP prefix names SKF ConCentra locking: a stepped (multi-diameter) sleeve between shaft and inner ring is driven axially to grip concentrically, avoiding the local shaft fretting of set screws or the imbalance of an eccentric collar. the three-digit -104 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 4/16 in = 31.75 mm (first digit whole inches, next two sixteenths of an inch). AG marks the agricultural-machinery application execution, built on the sealed both-sides-extended geometry and tuned for the low-speed, shock-laden duty of harvesters, balers and spreaders — note the catalogue prints a much reduced limiting speed for this variant." }, { "q": "Can the locking sleeve be reused?", "a": "Usually not after a full service life or an over-torqued first mounting: the stepped sleeve takes a permanent set. SKF recommends a new sleeve whenever the bearing is replaced on the same shaft." }, { "q": "When should I choose YSP over YAR or YEL?", "a": "Choose ConCentra for high run-out accuracy, vibrating or reversing shafts, and shafts that must not be marked: fans, vibrating conveyors, sieves and balanced rotors. It needs the correct sleeve and drive procedure rather than simple screw tightening." } ], "cross_ref": [ { "equiv_sku": "YSP-207-104-SB-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 31.75x72x39.7 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSP 207-104 SB-2F is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSPAG-207-104", "YSPAG 207-104" ], "locale_variants": {} }, { "sku": "YSP-207-104-SB-2F", "brand": "SKF", "manufacturer_designation": "YSP 207-104 SB-2F", "series": "YSP2-series", "type": "insert", "d_mm": 31.75, "D_mm": 72, "B_mm": 39.7, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 5300, "max_rpm": 5300, "weight_g": 500, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YSP 207-104 SB-2F is a SKF ConCentra insert bearing with concentric stepped-sleeve locking and symmetrically extended inner ring, 31.75x72x39.7 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction is a sealed deep-groove insert, a symmetrically extended inner ring and the stepped ConCentra sleeve — uniform grip, minimal run-out, no shaft damage from screw points or an eccentric mass. reading YSP: SKF ConCentra technology locks the shaft through a stepped sleeve that contracts uniformly, chosen for high run-out accuracy and for shafts that must not be marked by screw points or an eccentric. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -104 = 31.75 mm, which is why this row sits beside, not on, the metric bore size. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution. Envelope 31.75x72x39.7 mm (1.25x2.835x1.563 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. The catalogue publishes a single speed ceiling, the limiting speed: 5,300 r/min; mass 500 g. Speed ceiling of 5,300 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Static-first planning: the 0.385 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 31.75 mm shaft, not the 25.5 kN L10 value. Imperial procurement cross-check: 1.25 in bore, 2.835 in OD, 1.563 in overall width; the 500 g mass converts to 0.500 kg (17.6 oz) for the bill of materials. Load balance for documentation: C0 15.3 kN against C 25.5 kN gives a 0.6 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Rating split for the maintenance file: dynamic 25.5 kN (L10), static 15.3 kN (s0 shock check), fatigue 0.655 kN (adjusted life) — three separate uses for YSP 207-104 SB-2F, none interchangeable with another. ConCentra mounting note: the SB shortened-inner-ring sleeve is driven AXIALLY with the proper sleeve/drift until it seats against the abutment — driving at an angle burrs the stepped sleeve and destroys the concentricity advantage; removal needs the matching withdrawal technique, never a puller on the flingers. Reuse note for YSP-207-104-SB-2F: the stepped locking sleeve is a one-time clamping component in most over-torque cases; if the 31.75 mm shaft shows a polished sleeve imprint after withdrawal, fit a new sleeve rather than re-driving the old one.", "applications": [ "vibrating conveyors and sieves where screws loosen", "high-speed textile and processing rollers", "fan and blower positions sensitive to imbalance" ], "failure_modes": [ "stepped sleeve driven crooked scores the shaft and leaves one clamping arc unloaded", "undersized/over-toleranced shaft never reaches full sleeve grip despite correct drive-up", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "ConCentra solves run-out and fretting but not gross misalignment — the housing spherical seat still carries that function; do not use the sleeve grip as an excuse to skip housing alignment.", "Inspect the shaft before sleeve mounting: a single deep keyway burr or old screw-point dimple under the 39.7 mm-wide sleeve causes a local unclamped arc that later frets.", "The SB shortened-inner-ring ConCentra unit needs its matching mounting sleeve and procedure; substituting a standard YSP sleeve or a generic drift is the usual cause of crooked drive-up on the 31.75 mm shaft.", "Ordering discipline for the 31.75 mm size: the chapter lists several executions side by side (YSP2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSP-207-104-SB-2F?", "a": "The catalogue envelope is 31.75x72x39.7 mm with a spherical outside surface; mass 500 g. Ratings C 25.5/15.3 kN, Pu 0.655 kN, limiting speed 5,300 r/min." }, { "q": "What does the designation YSP 207-104 SB-2F mean?", "a": "reading YSP: SKF ConCentra technology locks the shaft through a stepped sleeve that contracts uniformly, chosen for high run-out accuracy and for shafts that must not be marked by screw points or an eccentric. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -104 = 31.75 mm, which is why this row sits beside, not on, the metric bore size. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution." }, { "q": "When should I choose YSP over YAR or YEL?", "a": "Choose ConCentra for high run-out accuracy, vibrating or reversing shafts, and shafts that must not be marked: fans, vibrating conveyors, sieves and balanced rotors. It needs the correct sleeve and drive procedure rather than simple screw tightening." }, { "q": "What does SB mean in YSP 207-104 SB-2F?", "a": "SB identifies the ConCentra ball bearing with a shortened inner ring; the overall width is shorter than the non-SB ConCentra design while keeping the concentric sleeve lock and the -2F seal/flinger package." } ], "cross_ref": [ { "equiv_sku": "YSPAG-207-104", "equiv_brand": "SKF", "level": "full", "note": "Same 31.75x72x39.7 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSPAG 207-104 is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSP-207-104-SB-2F", "YSP 207-104 SB-2F" ], "locale_variants": {} }, { "sku": "YSPAG-207-106", "brand": "SKF", "manufacturer_designation": "YSPAG 207-106", "series": "YSP2-series", "type": "insert", "d_mm": 34.925, "D_mm": 72, "B_mm": 39.7, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 1100, "max_rpm": 1100, "weight_g": 440, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YSP2 series order number YSPAG 207-106 is a SKF insert bearing (Y-bearing) for a 34.925 mm (1.375 in) shaft: SKF ConCentra insert bearing with concentric stepped-sleeve locking and symmetrically extended inner ring, built to the ISO 15 diameter-series envelope with a sphered OD of 72 mm. Inside is a capped ball insert whose extended inner ring tapers onto a multi-step locking sleeve; the sleeve grips the shaft around its full circumference and the spherical outer ring pivots in the housing. YSP denotes the ConCentra design — the SB execution in this chapter has the shortened inner ring; axial driving of the stepped sleeve produces a near-true concentric clamp with virtually no run-out penalty. inch bore code -106 decodes as 1\" +6/16, i.e. 34.925 mm; the metric coded size YSPAG 207 shares the same envelope but its bore is the metric value, not this one. the AG suffix identifies the farm-duty variant of the range: sealed and flinger-protected for chaff and dust, with the catalogue deliberately derating its permissible speed versus the industrial execution. Envelope 34.925x72x39.7 mm (1.375x2.835x1.563 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. The catalogue publishes a single speed ceiling, the limiting speed: 1,100 r/min; mass 440 g. Load balance for documentation: C0 15.3 kN against C 25.5 kN gives a 0.6 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Selection figures for YSPAG 207-106: C0/C is 0.6, Pu 0.655 kN is 2.569 % of the 25.5 kN dynamic rating, and the 440 g catalogue mass works out to roughly 12.598 g per millimetre of the 34.925 mm bore. Static-first planning: the 0.385 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 34.925 mm shaft, not the 25.5 kN L10 value. Pitch-diameter arithmetic: dm = (34.925+72)/2 = 53.462 mm; at the 1,100 r/min limiting speed the ball set runs at dn approx 0.59x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Rating split for the maintenance file: dynamic 25.5 kN (L10), static 15.3 kN (s0 shock check), fatigue 0.655 kN (adjusted life) — three separate uses for YSPAG 207-106, none interchangeable with another. Reuse note for YSPAG-207-106: the stepped locking sleeve is a one-time clamping component in most over-torque cases; if the 34.925 mm shaft shows a polished sleeve imprint after withdrawal, fit a new sleeve rather than re-driving the old one.", "applications": [ "high-speed textile and processing rollers", "fan and blower positions sensitive to imbalance", "food and packaging conveyors" ], "failure_modes": [ "undersized/over-toleranced shaft never reaches full sleeve grip despite correct drive-up", "puller applied to the sealed outer side during removal destroys flingers and seals instead of releasing the sleeve", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "Inspect the shaft before sleeve mounting: a single deep keyway burr or old screw-point dimple under the 39.7 mm-wide sleeve causes a local unclamped arc that later frets.", "ConCentra solves run-out and fretting but not gross misalignment — the housing spherical seat still carries that function; do not use the sleeve grip as an excuse to skip housing alignment.", "The SB shortened-inner-ring ConCentra unit needs its matching mounting sleeve and procedure; substituting a standard YSP sleeve or a generic drift is the usual cause of crooked drive-up on the 34.925 mm shaft.", "The 25.5/15.3 kN figures belong specifically to YSPAG 207-106; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSPAG-207-106?", "a": "Boundary dimensions: bore 34.925 mm, sphered OD 72 mm, overall width 39.7 mm; weight 440 g. Loads: dynamic 25.5 kN, static 15.3 kN, fatigue 0.655 kN; the only published speed is the 1,100 r/min limiting value." }, { "q": "What does the designation YSPAG 207-106 mean?", "a": "YSP denotes the ConCentra design — the SB execution in this chapter has the shortened inner ring; axial driving of the stepped sleeve produces a near-true concentric clamp with virtually no run-out penalty. inch bore code -106 decodes as 1\" +6/16, i.e. 34.925 mm; the metric coded size YSPAG 207 shares the same envelope but its bore is the metric value, not this one. the AG suffix identifies the farm-duty variant of the range: sealed and flinger-protected for chaff and dust, with the catalogue deliberately derating its permissible speed versus the industrial execution." }, { "q": "What does SB mean in YSPAG 207-106?", "a": "SB identifies the ConCentra ball bearing with a shortened inner ring; the overall width is shorter than the non-SB ConCentra design while keeping the concentric sleeve lock and the -2F seal/flinger package." }, { "q": "What is SKF ConCentra locking?", "a": "A stepped (multi-diameter) sleeve between the shaft and the tapered/stepped inner-ring seat is driven axially until it contracts uniformly around the shaft — full-circumference grip, low run-out and no screw-point indentations or eccentric imbalance." } ], "cross_ref": [ { "equiv_sku": "YSPAG-207", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x39.7 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSPAG 207 is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YSP-207-SB-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x39.7 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSP 207 SB-2F is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YSP-207-106-SB-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x39.7 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSP 207-106 SB-2F is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSPAG-207-106", "YSPAG 207-106" ], "locale_variants": {} }, { "sku": "YSP-207-106-SB-2F", "brand": "SKF", "manufacturer_designation": "YSP 207-106 SB-2F", "series": "YSP2-series", "type": "insert", "d_mm": 34.925, "D_mm": 72, "B_mm": 39.7, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 5300, "max_rpm": 5300, "weight_g": 450, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YSP 207-106 SB-2F is SKF's 34.925 mm-bore SKF ConCentra insert bearing with concentric stepped-sleeve locking and symmetrically extended inner ring in the YSP2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 34.925x72x39.7 mm. The ConCentra principle replaces point or eccentric clamping: a stepped sleeve between shaft and inner ring is driven axially to contract uniformly, concentric with the sphered-OD sealed ball insert. the YSP prefix names SKF ConCentra locking: a stepped (multi-diameter) sleeve between shaft and inner ring is driven axially to grip concentrically, avoiding the local shaft fretting of set screws or the imbalance of an eccentric collar. the three-digit -106 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 6/16 in = 34.925 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 34.925x72x39.7 mm (1.375x2.835x1.563 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. The catalogue publishes a single speed ceiling, the limiting speed: 5,300 r/min; mass 450 g. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 46.1 mm, d2 57 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the plain flinger. Fillet discipline: the printed minimum-fillet limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 34.925x72 mm insert on its chamfer tilts the whole spherical seat. Load balance for documentation: C0 15.3 kN against C 25.5 kN gives a 0.6 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Pitch-diameter arithmetic: dm = (34.925+72)/2 = 53.462 mm; at the 5,300 r/min limiting speed the ball set runs at dn approx 2.83x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Width accounting on this execution: 39.7 mm overall and 19 mm outer-ring width leave the housing designer 20.7 mm of inner-ring projection to accommodate the locking arrangement. ConCentra mounting note: the SB shortened-inner-ring sleeve is driven AXIALLY with the proper sleeve/drift until it seats against the abutment — driving at an angle burrs the stepped sleeve and destroys the concentricity advantage; removal needs the matching withdrawal technique, never a puller on the flingers. Reuse note for YSP-207-106-SB-2F: the stepped locking sleeve is a one-time clamping component in most over-torque cases; if the 34.925 mm shaft shows a polished sleeve imprint after withdrawal, fit a new sleeve rather than re-driving the old one.", "applications": [ "fan and blower positions sensitive to imbalance", "food and packaging conveyors", "vibrating conveyors and sieves where screws loosen" ], "failure_modes": [ "puller applied to the sealed outer side during removal destroys flingers and seals instead of releasing the sleeve", "sleeve re-driven after a first seating without cleaning gives false drive-up and creep under load", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "ConCentra solves run-out and fretting but not gross misalignment — the housing spherical seat still carries that function; do not use the sleeve grip as an excuse to skip housing alignment.", "The SB shortened-inner-ring ConCentra unit needs its matching mounting sleeve and procedure; substituting a standard YSP sleeve or a generic drift is the usual cause of crooked drive-up on the 34.925 mm shaft.", "Inspect the shaft before sleeve mounting: a single deep keyway burr or old screw-point dimple under the 39.7 mm-wide sleeve causes a local unclamped arc that later frets.", "Ordering discipline for the 34.925 mm size: the chapter lists several executions side by side (YSP2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSP-207-106-SB-2F?", "a": "YSP 207-106 SB-2F measures 34.925 mm bore x 72 mm OD x 39.7 mm overall width (outer ring 19 mm wide), 1.375 x 2.835 x 1.563 in; mass about 450 g. SKF 17000 ratings: C 25.5 kN, C0 15.3 kN, Pu 0.655 kN, limiting speed 5,300 r/min." }, { "q": "What does the designation YSP 207-106 SB-2F mean?", "a": "the YSP prefix names SKF ConCentra locking: a stepped (multi-diameter) sleeve between shaft and inner ring is driven axially to grip concentrically, avoiding the local shaft fretting of set screws or the imbalance of an eccentric collar. the three-digit -106 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 6/16 in = 34.925 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "What is SKF ConCentra locking?", "a": "A stepped (multi-diameter) sleeve between the shaft and the tapered/stepped inner-ring seat is driven axially until it contracts uniformly around the shaft — full-circumference grip, low run-out and no screw-point indentations or eccentric imbalance." }, { "q": "Can the locking sleeve be reused?", "a": "Usually not after a full service life or an over-torqued first mounting: the stepped sleeve takes a permanent set. SKF recommends a new sleeve whenever the bearing is replaced on the same shaft." } ], "cross_ref": [ { "equiv_sku": "YSPAG-207", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x39.7 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSPAG 207 is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YSP-207-SB-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x39.7 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSP 207 SB-2F is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 34.925 mm vs 35 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." }, { "equiv_sku": "YSPAG-207-106", "equiv_brand": "SKF", "level": "full", "note": "Same 34.925x72x39.7 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSPAG 207-106 is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSP-207-106-SB-2F", "YSP 207-106 SB-2F" ], "locale_variants": {} }, { "sku": "YSPAG-207-107", "brand": "SKF", "manufacturer_designation": "YSPAG 207-107", "series": "YSP2-series", "type": "insert", "d_mm": 36.512499999999996, "D_mm": 72, "B_mm": 39.7, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 1100, "max_rpm": 1100, "weight_g": 420, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YSPAG 207-107 is a SKF ConCentra insert bearing with concentric stepped-sleeve locking and symmetrically extended inner ring, 36.512499999999996x72x39.7 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction is a sealed deep-groove insert, a symmetrically extended inner ring and the stepped ConCentra sleeve — uniform grip, minimal run-out, no shaft damage from screw points or an eccentric mass. reading YSP: SKF ConCentra technology locks the shaft through a stepped sleeve that contracts uniformly, chosen for high run-out accuracy and for shafts that must not be marked by screw points or an eccentric. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -107 = 36.512 mm, which is why this row sits beside, not on, the metric bore size. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery. Envelope 36.512499999999996x72x39.7 mm (1.438x2.835x1.563 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. The catalogue publishes a single speed ceiling, the limiting speed: 1,100 r/min; mass 420 g. Fatigue-limit check: Pu 0.655 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YSPAG 207-107 — most belt-driven mounted-unit loads sit comfortably under 2.569 % of C. Mass-to-load ratio for YSPAG-207-107: 16.471 g of catalogue mass per rated kN of C, and 11.503 g per millimetre of bore — useful when comparing executions of the same 36.512499999999996x72 mm envelope on the drawing. Static-first planning: the 0.385 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 36.512499999999996 mm shaft, not the 25.5 kN L10 value. Envelope arithmetic: the radial section from 36.512499999999996 mm bore to 72 mm OD is 17.744 mm; dividing C 25.5 kN by that section gives 1.437 kN per section millimetre, and the 39.7 mm overall width is 2.237x the section. Outer-vs-overall width: the outer ring is 19 mm wide inside the 39.7 mm total, so the extended inner ring accounts for 0.521 of the overall width (10.35 mm of axial projection per side). Reuse note for YSPAG-207-107: the stepped locking sleeve is a one-time clamping component in most over-torque cases; if the 36.512499999999996 mm shaft shows a polished sleeve imprint after withdrawal, fit a new sleeve rather than re-driving the old one.", "applications": [ "fan and blower positions sensitive to imbalance", "food and packaging conveyors", "vibrating conveyors and sieves where screws loosen" ], "failure_modes": [ "puller applied to the sealed outer side during removal destroys flingers and seals instead of releasing the sleeve", "sleeve re-driven after a first seating without cleaning gives false drive-up and creep under load", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "relubricated with incompatible grease that hardens the factory fill and drags the seals" ], "pitfalls": [ "The SB shortened-inner-ring ConCentra unit needs its matching mounting sleeve and procedure; substituting a standard YSP sleeve or a generic drift is the usual cause of crooked drive-up on the 36.512499999999996 mm shaft.", "Inspect the shaft before sleeve mounting: a single deep keyway burr or old screw-point dimple under the 39.7 mm-wide sleeve causes a local unclamped arc that later frets.", "ConCentra solves run-out and fretting but not gross misalignment — the housing spherical seat still carries that function; do not use the sleeve grip as an excuse to skip housing alignment.", "Catalogue ratings belong to YSPAG 207-107 as the concentra two ag execution; other order numbers of the YSPAG 207-107 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSPAG-207-107?", "a": "The catalogue envelope is 36.512499999999996x72x39.7 mm with a spherical outside surface; mass 420 g. Ratings C 25.5/15.3 kN, Pu 0.655 kN, limiting speed 1,100 r/min." }, { "q": "What does the designation YSPAG 207-107 mean?", "a": "reading YSP: SKF ConCentra technology locks the shaft through a stepped sleeve that contracts uniformly, chosen for high run-out accuracy and for shafts that must not be marked by screw points or an eccentric. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -107 = 36.512 mm, which is why this row sits beside, not on, the metric bore size. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery." }, { "q": "What is SKF ConCentra locking?", "a": "A stepped (multi-diameter) sleeve between the shaft and the tapered/stepped inner-ring seat is driven axially until it contracts uniformly around the shaft — full-circumference grip, low run-out and no screw-point indentations or eccentric imbalance." }, { "q": "Can the locking sleeve be reused?", "a": "Usually not after a full service life or an over-torqued first mounting: the stepped sleeve takes a permanent set. SKF recommends a new sleeve whenever the bearing is replaced on the same shaft." } ], "cross_ref": [ { "equiv_sku": "YSP-207-107-SB-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 36.512499999999996x72x39.7 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSP 207-107 SB-2F is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSPAG-207-107", "YSPAG 207-107" ], "locale_variants": {} }, { "sku": "YSP-207-107-SB-2F", "brand": "SKF", "manufacturer_designation": "YSP 207-107 SB-2F", "series": "YSP2-series", "type": "insert", "d_mm": 36.512499999999996, "D_mm": 72, "B_mm": 39.7, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 5300, "max_rpm": 5300, "weight_g": 420, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YSP2 series order number YSP 207-107 SB-2F is a SKF insert bearing (Y-bearing) for a 36.512499999999996 mm (1.438 in) shaft: SKF ConCentra insert bearing with concentric stepped-sleeve locking and symmetrically extended inner ring, built to the ISO 15 diameter-series envelope with a sphered OD of 72 mm. Inside is a capped ball insert whose extended inner ring tapers onto a multi-step locking sleeve; the sleeve grips the shaft around its full circumference and the spherical outer ring pivots in the housing. YSP denotes the ConCentra design — the SB execution in this chapter has the shortened inner ring; axial driving of the stepped sleeve produces a near-true concentric clamp with virtually no run-out penalty. inch bore code -107 decodes as 1\" +7/16, i.e. 36.512 mm; the metric coded size YSP 207 shares the same envelope but its bore is the metric value, not this one. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 36.512499999999996x72x39.7 mm (1.438x2.835x1.563 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. The catalogue publishes a single speed ceiling, the limiting speed: 5,300 r/min; mass 420 g. At the printed limiting speed of 5,300 r/min the mean diameter dm = 54.256 mm implies dn about 2.88x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Fatigue-limit check: Pu 0.655 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YSP 207-107 SB-2F — most belt-driven mounted-unit loads sit comfortably under 2.569 % of C. Static-first planning: the 0.385 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 36.512499999999996 mm shaft, not the 25.5 kN L10 value. Grease-life arithmetic is dominated by speed: at dn approx 2.88x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Bore-to-OD planning: OD 72 over bore 36.512499999999996 is a 1.972x step, while bore/overall-width gives 0.92; the spherical seat in the matching Y-housing must be specified to the 72 mm OD, not to a cylindrical housing bore. ConCentra mounting note: the SB shortened-inner-ring sleeve is driven AXIALLY with the proper sleeve/drift until it seats against the abutment — driving at an angle burrs the stepped sleeve and destroys the concentricity advantage; removal needs the matching withdrawal technique, never a puller on the flingers. Sleeve geometry: the ConCentra stepped sleeve occupies the symmetric extension up to the 39.7 mm overall width while the sphered outer ring stays 19 mm wide — uniform sleeve contraction is why run-out stays low at 36.512499999999996 mm bore.", "applications": [ "fan and blower positions sensitive to imbalance", "vibrating conveyors and sieves where screws loosen", "food and packaging conveyors" ], "failure_modes": [ "puller applied to the sealed outer side during removal destroys flingers and seals instead of releasing the sleeve", "stepped sleeve driven crooked scores the shaft and leaves one clamping arc unloaded", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "Inspect the shaft before sleeve mounting: a single deep keyway burr or old screw-point dimple under the 39.7 mm-wide sleeve causes a local unclamped arc that later frets.", "The SB shortened-inner-ring ConCentra unit needs its matching mounting sleeve and procedure; substituting a standard YSP sleeve or a generic drift is the usual cause of crooked drive-up on the 36.512499999999996 mm shaft.", "ConCentra solves run-out and fretting but not gross misalignment — the housing spherical seat still carries that function; do not use the sleeve grip as an excuse to skip housing alignment.", "The 25.5/15.3 kN figures belong specifically to YSP 207-107 SB-2F; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSP-207-107-SB-2F?", "a": "Boundary dimensions: bore 36.512499999999996 mm, sphered OD 72 mm, overall width 39.7 mm; weight 420 g. Loads: dynamic 25.5 kN, static 15.3 kN, fatigue 0.655 kN; the only published speed is the 5,300 r/min limiting value." }, { "q": "What does the designation YSP 207-107 SB-2F mean?", "a": "YSP denotes the ConCentra design — the SB execution in this chapter has the shortened inner ring; axial driving of the stepped sleeve produces a near-true concentric clamp with virtually no run-out penalty. inch bore code -107 decodes as 1\" +7/16, i.e. 36.512 mm; the metric coded size YSP 207 shares the same envelope but its bore is the metric value, not this one. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "Can the locking sleeve be reused?", "a": "Usually not after a full service life or an over-torqued first mounting: the stepped sleeve takes a permanent set. SKF recommends a new sleeve whenever the bearing is replaced on the same shaft." }, { "q": "When should I choose YSP over YAR or YEL?", "a": "Choose ConCentra for high run-out accuracy, vibrating or reversing shafts, and shafts that must not be marked: fans, vibrating conveyors, sieves and balanced rotors. It needs the correct sleeve and drive procedure rather than simple screw tightening." } ], "cross_ref": [ { "equiv_sku": "YSPAG-207-107", "equiv_brand": "SKF", "level": "full", "note": "Same 36.512499999999996x72x39.7 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSPAG 207-107 is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSP-207-107-SB-2F", "YSP 207-107 SB-2F" ], "locale_variants": {} }, { "sku": "YSPAG-208-108", "brand": "SKF", "manufacturer_designation": "YSPAG 208-108", "series": "YSP2-series", "type": "insert", "d_mm": 38.099999999999994, "D_mm": 80, "B_mm": 43.1, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 30.7, "static_load_kN": 19, "fatigue_load_limit_kN": 0.8, "limiting_speed_rpm": 950, "max_rpm": 950, "weight_g": 610, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YSP2 series order number YSPAG 208-108 is a SKF insert bearing (Y-bearing) for a 38.099999999999994 mm (1.5 in) shaft: SKF ConCentra insert bearing with concentric stepped-sleeve locking and symmetrically extended inner ring, built to the ISO 15 diameter-series envelope with a sphered OD of 80 mm. Inside is a capped ball insert whose extended inner ring tapers onto a multi-step locking sleeve; the sleeve grips the shaft around its full circumference and the spherical outer ring pivots in the housing. YSP denotes the ConCentra design — the SB execution in this chapter has the shortened inner ring; axial driving of the stepped sleeve produces a near-true concentric clamp with virtually no run-out penalty. inch bore code -108 decodes as 1\" +8/16, i.e. 38.1 mm; the metric coded size YSPAG 208 shares the same envelope but its bore is the metric value, not this one. the AG suffix identifies the farm-duty variant of the range: sealed and flinger-protected for chaff and dust, with the catalogue deliberately derating its permissible speed versus the industrial execution. Envelope 38.099999999999994x80x43.1 mm (1.5x3.15x1.697 in), outer ring 21 mm wide, C 30.7 kN, C0 19 kN, Pu 0.8 kN. The catalogue publishes a single speed ceiling, the limiting speed: 950 r/min; mass 610 g. At the printed limiting speed of 950 r/min the mean diameter dm = 59.05 mm implies dn about 0.56x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Bore-to-OD planning: OD 80 over bore 38.099999999999994 is a 2.1x step, while bore/overall-width gives 0.884; the spherical seat in the matching Y-housing must be specified to the 80 mm OD, not to a cylindrical housing bore. Spherical-seat note in numbers: the 80 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 59.05 = 185.511 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Load balance for documentation: C0 19 kN against C 30.7 kN gives a 0.619 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Mass-to-load ratio for YSPAG-208-108: 19.87 g of catalogue mass per rated kN of C, and 16.01 g per millimetre of bore — useful when comparing executions of the same 38.099999999999994x80 mm envelope on the drawing. Reuse note for YSPAG-208-108: the stepped locking sleeve is a one-time clamping component in most over-torque cases; if the 38.099999999999994 mm shaft shows a polished sleeve imprint after withdrawal, fit a new sleeve rather than re-driving the old one.", "applications": [ "fan and blower positions sensitive to imbalance", "food and packaging conveyors", "vibrating conveyors and sieves where screws loosen" ], "failure_modes": [ "puller applied to the sealed outer side during removal destroys flingers and seals instead of releasing the sleeve", "sleeve re-driven after a first seating without cleaning gives false drive-up and creep under load", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "Inspect the shaft before sleeve mounting: a single deep keyway burr or old screw-point dimple under the 43.1 mm-wide sleeve causes a local unclamped arc that later frets.", "ConCentra solves run-out and fretting but not gross misalignment — the housing spherical seat still carries that function; do not use the sleeve grip as an excuse to skip housing alignment.", "The SB shortened-inner-ring ConCentra unit needs its matching mounting sleeve and procedure; substituting a standard YSP sleeve or a generic drift is the usual cause of crooked drive-up on the 38.099999999999994 mm shaft.", "The 30.7/19 kN figures belong specifically to YSPAG 208-108; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSPAG-208-108?", "a": "Boundary dimensions: bore 38.099999999999994 mm, sphered OD 80 mm, overall width 43.1 mm; weight 610 g. Loads: dynamic 30.7 kN, static 19 kN, fatigue 0.8 kN; the only published speed is the 950 r/min limiting value." }, { "q": "What does the designation YSPAG 208-108 mean?", "a": "YSP denotes the ConCentra design — the SB execution in this chapter has the shortened inner ring; axial driving of the stepped sleeve produces a near-true concentric clamp with virtually no run-out penalty. inch bore code -108 decodes as 1\" +8/16, i.e. 38.1 mm; the metric coded size YSPAG 208 shares the same envelope but its bore is the metric value, not this one. the AG suffix identifies the farm-duty variant of the range: sealed and flinger-protected for chaff and dust, with the catalogue deliberately derating its permissible speed versus the industrial execution." }, { "q": "What is SKF ConCentra locking?", "a": "A stepped (multi-diameter) sleeve between the shaft and the tapered/stepped inner-ring seat is driven axially until it contracts uniformly around the shaft — full-circumference grip, low run-out and no screw-point indentations or eccentric imbalance." }, { "q": "Can the locking sleeve be reused?", "a": "Usually not after a full service life or an over-torqued first mounting: the stepped sleeve takes a permanent set. SKF recommends a new sleeve whenever the bearing is replaced on the same shaft." } ], "cross_ref": [ { "equiv_sku": "YELAG-208-108", "equiv_brand": "SKF", "level": "full", "note": "Same 38.099999999999994x80x43.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 208-108 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YEL-208-108-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 38.099999999999994x80x43.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 208-108-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YSP-208-108-SB-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 38.099999999999994x80x43.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSP 208-108 SB-2F is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSPAG-208-108", "YSPAG 208-108" ], "locale_variants": {} }, { "sku": "YSP-208-108-SB-2F", "brand": "SKF", "manufacturer_designation": "YSP 208-108 SB-2F", "series": "YSP2-series", "type": "insert", "d_mm": 38.099999999999994, "D_mm": 80, "B_mm": 43.1, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 30.7, "static_load_kN": 19, "fatigue_load_limit_kN": 0.8, "limiting_speed_rpm": 4800, "max_rpm": 4800, "weight_g": 620, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YSP 208-108 SB-2F is SKF's 38.099999999999994 mm-bore SKF ConCentra insert bearing with concentric stepped-sleeve locking and symmetrically extended inner ring in the YSP2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 38.099999999999994x80x43.1 mm. The ConCentra principle replaces point or eccentric clamping: a stepped sleeve between shaft and inner ring is driven axially to contract uniformly, concentric with the sphered-OD sealed ball insert. the YSP prefix names SKF ConCentra locking: a stepped (multi-diameter) sleeve between shaft and inner ring is driven axially to grip concentrically, avoiding the local shaft fretting of set screws or the imbalance of an eccentric collar. the three-digit -108 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 8/16 in = 38.1 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 38.099999999999994x80x43.1 mm (1.5x3.15x1.697 in), outer ring 21 mm wide, C 30.7 kN, C0 19 kN, Pu 0.8 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,800 r/min; mass 620 g. Fatigue-limit check: Pu 0.8 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YSP 208-108 SB-2F — most belt-driven mounted-unit loads sit comfortably under 2.606 % of C. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 51.8 mm, d2 62 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the plain flinger. Grease-life arithmetic is dominated by speed: at dn approx 2.83x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Static-first planning: the 0.441 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 38.099999999999994 mm shaft, not the 30.7 kN L10 value. Bore-to-OD planning: OD 80 over bore 38.099999999999994 is a 2.1x step, while bore/overall-width gives 0.884; the spherical seat in the matching Y-housing must be specified to the 80 mm OD, not to a cylindrical housing bore. ConCentra mounting note: the SB shortened-inner-ring sleeve is driven AXIALLY with the proper sleeve/drift until it seats against the abutment — driving at an angle burrs the stepped sleeve and destroys the concentricity advantage; removal needs the matching withdrawal technique, never a puller on the flingers. Sleeve geometry: the ConCentra stepped sleeve occupies the symmetric extension up to the 43.1 mm overall width while the sphered outer ring stays 21 mm wide — uniform sleeve contraction is why run-out stays low at 38.099999999999994 mm bore.", "applications": [ "fan and blower positions sensitive to imbalance", "vibrating conveyors and sieves where screws loosen", "food and packaging conveyors" ], "failure_modes": [ "puller applied to the sealed outer side during removal destroys flingers and seals instead of releasing the sleeve", "stepped sleeve driven crooked scores the shaft and leaves one clamping arc unloaded", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "ConCentra solves run-out and fretting but not gross misalignment — the housing spherical seat still carries that function; do not use the sleeve grip as an excuse to skip housing alignment.", "The SB shortened-inner-ring ConCentra unit needs its matching mounting sleeve and procedure; substituting a standard YSP sleeve or a generic drift is the usual cause of crooked drive-up on the 38.099999999999994 mm shaft.", "Inspect the shaft before sleeve mounting: a single deep keyway burr or old screw-point dimple under the 43.1 mm-wide sleeve causes a local unclamped arc that later frets.", "Ordering discipline for the 38.099999999999994 mm size: the chapter lists several executions side by side (YSP2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSP-208-108-SB-2F?", "a": "YSP 208-108 SB-2F measures 38.099999999999994 mm bore x 80 mm OD x 43.1 mm overall width (outer ring 21 mm wide), 1.5 x 3.15 x 1.697 in; mass about 620 g. SKF 17000 ratings: C 30.7 kN, C0 19 kN, Pu 0.8 kN, limiting speed 4,800 r/min." }, { "q": "What does the designation YSP 208-108 SB-2F mean?", "a": "the YSP prefix names SKF ConCentra locking: a stepped (multi-diameter) sleeve between shaft and inner ring is driven axially to grip concentrically, avoiding the local shaft fretting of set screws or the imbalance of an eccentric collar. the three-digit -108 tail codes the bore in inches for inch-shaft bearings: 1 whole inch 8/16 in = 38.1 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "Can the locking sleeve be reused?", "a": "Usually not after a full service life or an over-torqued first mounting: the stepped sleeve takes a permanent set. SKF recommends a new sleeve whenever the bearing is replaced on the same shaft." }, { "q": "When should I choose YSP over YAR or YEL?", "a": "Choose ConCentra for high run-out accuracy, vibrating or reversing shafts, and shafts that must not be marked: fans, vibrating conveyors, sieves and balanced rotors. It needs the correct sleeve and drive procedure rather than simple screw tightening." } ], "cross_ref": [ { "equiv_sku": "YELAG-208-108", "equiv_brand": "SKF", "level": "full", "note": "Same 38.099999999999994x80x43.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YELAG 208-108 is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YEL-208-108-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 38.099999999999994x80x43.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YEL 208-108-2F is the eccentric collar locking, both-sides-extended inner ring execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "YSPAG-208-108", "equiv_brand": "SKF", "level": "full", "note": "Same 38.099999999999994x80x43.1 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSPAG 208-108 is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSP-208-108-SB-2F", "YSP 208-108 SB-2F" ], "locale_variants": {} }, { "sku": "YSPAG-209-111", "brand": "SKF", "manufacturer_designation": "YSPAG 209-111", "series": "YSP2-series", "type": "insert", "d_mm": 42.8625, "D_mm": 85, "B_mm": 44.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 33.2, "static_load_kN": 21.6, "fatigue_load_limit_kN": 0.915, "limiting_speed_rpm": 850, "max_rpm": 850, "weight_g": 690, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YSPAG 209-111 is a SKF ConCentra insert bearing with concentric stepped-sleeve locking and symmetrically extended inner ring, 42.8625x85x44.2 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction is a sealed deep-groove insert, a symmetrically extended inner ring and the stepped ConCentra sleeve — uniform grip, minimal run-out, no shaft damage from screw points or an eccentric mass. reading YSP: SKF ConCentra technology locks the shaft through a stepped sleeve that contracts uniformly, chosen for high run-out accuracy and for shafts that must not be marked by screw points or an eccentric. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -111 = 42.862 mm, which is why this row sits beside, not on, the metric bore size. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery. Envelope 42.8625x85x44.2 mm (1.688x3.346x1.74 in), outer ring 22 mm wide, C 33.2 kN, C0 21.6 kN, Pu 0.915 kN. The catalogue publishes a single speed ceiling, the limiting speed: 850 r/min; mass 690 g. Mass-to-load ratio for YSPAG-209-111: 20.783 g of catalogue mass per rated kN of C, and 16.098 g per millimetre of bore — useful when comparing executions of the same 42.8625x85 mm envelope on the drawing. Grease-life arithmetic is dominated by speed: at dn approx 0.54x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the AG variant caps speed so aggressively, and high-temperature mounts shorten both even when load is light. The s1 26.7 mm dimension is printed for the locking zone — the pre-drive position of the ConCentra stepped sleeve — and it is verified at mounting, not recoverable from d/D/B alone. Selection figures for YSPAG 209-111: C0/C is 0.651, Pu 0.915 kN is 2.756 % of the 33.2 kN dynamic rating, and the 690 g catalogue mass works out to roughly 16.098 g per millimetre of the 42.8625 mm bore. Imperial procurement cross-check: 1.688 in bore, 3.346 in OD, 1.74 in overall width; the 690 g mass converts to 0.690 kg (24.3 oz) for the bill of materials. Reuse note for YSPAG-209-111: the stepped locking sleeve is a one-time clamping component in most over-torque cases; if the 42.8625 mm shaft shows a polished sleeve imprint after withdrawal, fit a new sleeve rather than re-driving the old one.", "applications": [ "food and packaging conveyors", "vibrating conveyors and sieves where screws loosen", "high-speed textile and processing rollers" ], "failure_modes": [ "sleeve re-driven after a first seating without cleaning gives false drive-up and creep under load", "stepped sleeve driven crooked scores the shaft and leaves one clamping arc unloaded", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "The SB shortened-inner-ring ConCentra unit needs its matching mounting sleeve and procedure; substituting a standard YSP sleeve or a generic drift is the usual cause of crooked drive-up on the 42.8625 mm shaft.", "Inspect the shaft before sleeve mounting: a single deep keyway burr or old screw-point dimple under the 44.2 mm-wide sleeve causes a local unclamped arc that later frets.", "ConCentra solves run-out and fretting but not gross misalignment — the housing spherical seat still carries that function; do not use the sleeve grip as an excuse to skip housing alignment.", "Catalogue ratings belong to YSPAG 209-111 as the concentra two ag execution; other order numbers of the YSPAG 209-111 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSPAG-209-111?", "a": "The catalogue envelope is 42.8625x85x44.2 mm with a spherical outside surface; mass 690 g. Ratings C 33.2/21.6 kN, Pu 0.915 kN, limiting speed 850 r/min." }, { "q": "What does the designation YSPAG 209-111 mean?", "a": "reading YSP: SKF ConCentra technology locks the shaft through a stepped sleeve that contracts uniformly, chosen for high run-out accuracy and for shafts that must not be marked by screw points or an eccentric. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -111 = 42.862 mm, which is why this row sits beside, not on, the metric bore size. AG is the application variant for agricultural equipment — the same bore and OD as the standard sealed size but an application-specific grease/seal build and a conservative limiting speed for field machinery." }, { "q": "Can the locking sleeve be reused?", "a": "Usually not after a full service life or an over-torqued first mounting: the stepped sleeve takes a permanent set. SKF recommends a new sleeve whenever the bearing is replaced on the same shaft." }, { "q": "When should I choose YSP over YAR or YEL?", "a": "Choose ConCentra for high run-out accuracy, vibrating or reversing shafts, and shafts that must not be marked: fans, vibrating conveyors, sieves and balanced rotors. It needs the correct sleeve and drive procedure rather than simple screw tightening." } ], "cross_ref": [ { "equiv_sku": "YSP-209-111-SB-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 42.8625x85x44.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSP 209-111 SB-2F is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSPAG-209-111", "YSPAG 209-111" ], "locale_variants": {} }, { "sku": "YSP-209-111-SB-2F", "brand": "SKF", "manufacturer_designation": "YSP 209-111 SB-2F", "series": "YSP2-series", "type": "insert", "d_mm": 42.8625, "D_mm": 85, "B_mm": 44.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 33.2, "static_load_kN": 21.6, "fatigue_load_limit_kN": 0.915, "limiting_speed_rpm": 4300, "max_rpm": 4300, "weight_g": 700, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YSP2 series order number YSP 209-111 SB-2F is a SKF insert bearing (Y-bearing) for a 42.8625 mm (1.688 in) shaft: SKF ConCentra insert bearing with concentric stepped-sleeve locking and symmetrically extended inner ring, built to the ISO 15 diameter-series envelope with a sphered OD of 85 mm. Inside is a capped ball insert whose extended inner ring tapers onto a multi-step locking sleeve; the sleeve grips the shaft around its full circumference and the spherical outer ring pivots in the housing. YSP denotes the ConCentra design — the SB execution in this chapter has the shortened inner ring; axial driving of the stepped sleeve produces a near-true concentric clamp with virtually no run-out penalty. inch bore code -111 decodes as 1\" +11/16, i.e. 42.862 mm; the metric coded size YSP 209 shares the same envelope but its bore is the metric value, not this one. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 42.8625x85x44.2 mm (1.688x3.346x1.74 in), outer ring 22 mm wide, C 33.2 kN, C0 21.6 kN, Pu 0.915 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,300 r/min; mass 700 g. Bore-to-OD planning: OD 85 over bore 42.8625 is a 1.983x step, while bore/overall-width gives 0.97; the spherical seat in the matching Y-housing must be specified to the 85 mm OD, not to a cylindrical housing bore. Static-first planning: the 0.489 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 42.8625 mm shaft, not the 33.2 kN L10 value. Grease-life arithmetic is dominated by speed: at dn approx 2.75x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Pitch-diameter arithmetic: dm = (42.8625+85)/2 = 63.931 mm; at the 4,300 r/min limiting speed the ball set runs at dn approx 2.75x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Width accounting on this execution: 44.2 mm overall and 22 mm outer-ring width leave the housing designer 22.2 mm of inner-ring projection to accommodate the locking arrangement. ConCentra mounting note: the SB shortened-inner-ring sleeve is driven AXIALLY with the proper sleeve/drift until it seats against the abutment — driving at an angle burrs the stepped sleeve and destroys the concentricity advantage; removal needs the matching withdrawal technique, never a puller on the flingers. Sleeve geometry: the ConCentra stepped sleeve occupies the symmetric extension up to the 44.2 mm overall width while the sphered outer ring stays 22 mm wide — uniform sleeve contraction is why run-out stays low at 42.8625 mm bore.", "applications": [ "food and packaging conveyors", "high-speed textile and processing rollers", "vibrating conveyors and sieves where screws loosen" ], "failure_modes": [ "sleeve re-driven after a first seating without cleaning gives false drive-up and creep under load", "undersized/over-toleranced shaft never reaches full sleeve grip despite correct drive-up", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "relubricated with incompatible grease that hardens the factory fill and drags the seals" ], "pitfalls": [ "Inspect the shaft before sleeve mounting: a single deep keyway burr or old screw-point dimple under the 44.2 mm-wide sleeve causes a local unclamped arc that later frets.", "ConCentra solves run-out and fretting but not gross misalignment — the housing spherical seat still carries that function; do not use the sleeve grip as an excuse to skip housing alignment.", "The SB shortened-inner-ring ConCentra unit needs its matching mounting sleeve and procedure; substituting a standard YSP sleeve or a generic drift is the usual cause of crooked drive-up on the 42.8625 mm shaft.", "The 33.2/21.6 kN figures belong specifically to YSP 209-111 SB-2F; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSP-209-111-SB-2F?", "a": "Boundary dimensions: bore 42.8625 mm, sphered OD 85 mm, overall width 44.2 mm; weight 700 g. Loads: dynamic 33.2 kN, static 21.6 kN, fatigue 0.915 kN; the only published speed is the 4,300 r/min limiting value." }, { "q": "What does the designation YSP 209-111 SB-2F mean?", "a": "YSP denotes the ConCentra design — the SB execution in this chapter has the shortened inner ring; axial driving of the stepped sleeve produces a near-true concentric clamp with virtually no run-out penalty. inch bore code -111 decodes as 1\" +11/16, i.e. 42.862 mm; the metric coded size YSP 209 shares the same envelope but its bore is the metric value, not this one. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "When should I choose YSP over YAR or YEL?", "a": "Choose ConCentra for high run-out accuracy, vibrating or reversing shafts, and shafts that must not be marked: fans, vibrating conveyors, sieves and balanced rotors. It needs the correct sleeve and drive procedure rather than simple screw tightening." }, { "q": "What does SB mean in YSP 209-111 SB-2F?", "a": "SB identifies the ConCentra ball bearing with a shortened inner ring; the overall width is shorter than the non-SB ConCentra design while keeping the concentric sleeve lock and the -2F seal/flinger package." } ], "cross_ref": [ { "equiv_sku": "YSPAG-209-111", "equiv_brand": "SKF", "level": "full", "note": "Same 42.8625x85x44.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSPAG 209-111 is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSP-209-111-SB-2F", "YSP 209-111 SB-2F" ], "locale_variants": {} }, { "sku": "YSPAG-210-115", "brand": "SKF", "manufacturer_designation": "YSPAG 210-115", "series": "YSP2-series", "type": "insert", "d_mm": 49.2125, "D_mm": 90, "B_mm": 46.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 35.1, "static_load_kN": 23.2, "fatigue_load_limit_kN": 0.98, "limiting_speed_rpm": 800, "max_rpm": 800, "weight_g": 740, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YSP2 series order number YSPAG 210-115 is a SKF insert bearing (Y-bearing) for a 49.2125 mm (1.938 in) shaft: SKF ConCentra insert bearing with concentric stepped-sleeve locking and symmetrically extended inner ring, built to the ISO 15 diameter-series envelope with a sphered OD of 90 mm. Inside is a capped ball insert whose extended inner ring tapers onto a multi-step locking sleeve; the sleeve grips the shaft around its full circumference and the spherical outer ring pivots in the housing. YSP denotes the ConCentra design — the SB execution in this chapter has the shortened inner ring; axial driving of the stepped sleeve produces a near-true concentric clamp with virtually no run-out penalty. inch bore code -115 decodes as 1\" +15/16, i.e. 49.212 mm; the metric coded size YSPAG 210 shares the same envelope but its bore is the metric value, not this one. the AG suffix identifies the farm-duty variant of the range: sealed and flinger-protected for chaff and dust, with the catalogue deliberately derating its permissible speed versus the industrial execution. Envelope 49.2125x90x46.2 mm (1.938x3.543x1.819 in), outer ring 22 mm wide, C 35.1 kN, C0 23.2 kN, Pu 0.98 kN. The catalogue publishes a single speed ceiling, the limiting speed: 800 r/min; mass 740 g. Selection figures for YSPAG 210-115: C0/C is 0.661, Pu 0.98 kN is 2.792 % of the 35.1 kN dynamic rating, and the 740 g catalogue mass works out to roughly 15.037 g per millimetre of the 49.2125 mm bore. Outer-vs-overall width: the outer ring is 22 mm wide inside the 46.2 mm total, so the extended inner ring accounts for 0.524 of the overall width (12.1 mm of axial projection per side). Inner-geometry cross-reference: the catalogue shoulder diameters (d1 62.51 mm, d2 72 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the inner flinger. The s1 27.7 mm dimension is printed for the locking zone — the pre-drive position of the ConCentra stepped sleeve — and it is verified at mounting, not recoverable from d/D/B alone. Capacity density: 35.1 kN from 0.740 kg of bearing steel is about 47.432 kN per kilogram, and per width millimetre the 46.2 mm unit carries 0.76 kN of dynamic capacity. Sleeve geometry: the ConCentra stepped sleeve occupies the symmetric extension up to the 46.2 mm overall width while the sphered outer ring stays 22 mm wide — uniform sleeve contraction is why run-out stays low at 49.2125 mm bore.", "applications": [ "vibrating conveyors and sieves where screws loosen", "fan and blower positions sensitive to imbalance", "high-speed textile and processing rollers" ], "failure_modes": [ "stepped sleeve driven crooked scores the shaft and leaves one clamping arc unloaded", "puller applied to the sealed outer side during removal destroys flingers and seals instead of releasing the sleeve", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "Inspect the shaft before sleeve mounting: a single deep keyway burr or old screw-point dimple under the 46.2 mm-wide sleeve causes a local unclamped arc that later frets.", "ConCentra solves run-out and fretting but not gross misalignment — the housing spherical seat still carries that function; do not use the sleeve grip as an excuse to skip housing alignment.", "The SB shortened-inner-ring ConCentra unit needs its matching mounting sleeve and procedure; substituting a standard YSP sleeve or a generic drift is the usual cause of crooked drive-up on the 49.2125 mm shaft.", "The 35.1/23.2 kN figures belong specifically to YSPAG 210-115; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSPAG-210-115?", "a": "Boundary dimensions: bore 49.2125 mm, sphered OD 90 mm, overall width 46.2 mm; weight 740 g. Loads: dynamic 35.1 kN, static 23.2 kN, fatigue 0.98 kN; the only published speed is the 800 r/min limiting value." }, { "q": "What does the designation YSPAG 210-115 mean?", "a": "YSP denotes the ConCentra design — the SB execution in this chapter has the shortened inner ring; axial driving of the stepped sleeve produces a near-true concentric clamp with virtually no run-out penalty. inch bore code -115 decodes as 1\" +15/16, i.e. 49.212 mm; the metric coded size YSPAG 210 shares the same envelope but its bore is the metric value, not this one. the AG suffix identifies the farm-duty variant of the range: sealed and flinger-protected for chaff and dust, with the catalogue deliberately derating its permissible speed versus the industrial execution." }, { "q": "What does SB mean in YSPAG 210-115?", "a": "SB identifies the ConCentra ball bearing with a shortened inner ring; the overall width is shorter than the non-SB ConCentra design while keeping the concentric sleeve lock and the -2F seal/flinger package." }, { "q": "What is SKF ConCentra locking?", "a": "A stepped (multi-diameter) sleeve between the shaft and the tapered/stepped inner-ring seat is driven axially until it contracts uniformly around the shaft — full-circumference grip, low run-out and no screw-point indentations or eccentric imbalance." } ], "cross_ref": [ { "equiv_sku": "YSP-210-115-SB-2F", "equiv_brand": "SKF", "level": "full", "note": "Same 49.2125x90x46.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSP 210-115 SB-2F is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSPAG-210-115", "YSPAG 210-115" ], "locale_variants": {} }, { "sku": "YSP-210-115-SB-2F", "brand": "SKF", "manufacturer_designation": "YSP 210-115 SB-2F", "series": "YSP2-series", "type": "insert", "d_mm": 49.2125, "D_mm": 90, "B_mm": 46.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 35.1, "static_load_kN": 23.2, "fatigue_load_limit_kN": 0.98, "limiting_speed_rpm": 4000, "max_rpm": 4000, "weight_g": 760, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YSP 210-115 SB-2F is a SKF ConCentra insert bearing with concentric stepped-sleeve locking and symmetrically extended inner ring, 49.2125x90x46.2 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction is a sealed deep-groove insert, a symmetrically extended inner ring and the stepped ConCentra sleeve — uniform grip, minimal run-out, no shaft damage from screw points or an eccentric mass. reading YSP: SKF ConCentra technology locks the shaft through a stepped sleeve that contracts uniformly, chosen for high run-out accuracy and for shafts that must not be marked by screw points or an eccentric. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -115 = 49.212 mm, which is why this row sits beside, not on, the metric bore size. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution. Envelope 49.2125x90x46.2 mm (1.938x3.543x1.819 in), outer ring 22 mm wide, C 35.1 kN, C0 23.2 kN, Pu 0.98 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,000 r/min; mass 760 g. Grease-life arithmetic is dominated by speed: at dn approx 2.78x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Fillet discipline: the printed minimum-fillet limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 49.2125x90 mm insert on its chamfer tilts the whole spherical seat. Load balance for documentation: C0 23.2 kN against C 35.1 kN gives a 0.661 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Mass-to-load ratio for YSP-210-115-SB-2F: 21.652 g of catalogue mass per rated kN of C, and 15.443 g per millimetre of bore — useful when comparing executions of the same 49.2125x90 mm envelope on the drawing. Selection figures for YSP 210-115 SB-2F: C0/C is 0.661, Pu 0.98 kN is 2.792 % of the 35.1 kN dynamic rating, and the 760 g catalogue mass works out to roughly 15.443 g per millimetre of the 49.2125 mm bore. ConCentra mounting note: the SB shortened-inner-ring sleeve is driven AXIALLY with the proper sleeve/drift until it seats against the abutment — driving at an angle burrs the stepped sleeve and destroys the concentricity advantage; removal needs the matching withdrawal technique, never a puller on the flingers. Reuse note for YSP-210-115-SB-2F: the stepped locking sleeve is a one-time clamping component in most over-torque cases; if the 49.2125 mm shaft shows a polished sleeve imprint after withdrawal, fit a new sleeve rather than re-driving the old one.", "applications": [ "fan and blower positions sensitive to imbalance", "food and packaging conveyors", "vibrating conveyors and sieves where screws loosen" ], "failure_modes": [ "puller applied to the sealed outer side during removal destroys flingers and seals instead of releasing the sleeve", "sleeve re-driven after a first seating without cleaning gives false drive-up and creep under load", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "ConCentra solves run-out and fretting but not gross misalignment — the housing spherical seat still carries that function; do not use the sleeve grip as an excuse to skip housing alignment.", "The SB shortened-inner-ring ConCentra unit needs its matching mounting sleeve and procedure; substituting a standard YSP sleeve or a generic drift is the usual cause of crooked drive-up on the 49.2125 mm shaft.", "Inspect the shaft before sleeve mounting: a single deep keyway burr or old screw-point dimple under the 46.2 mm-wide sleeve causes a local unclamped arc that later frets.", "Ordering discipline for the 49.2125 mm size: the chapter lists several executions side by side (YSP2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSP-210-115-SB-2F?", "a": "The catalogue envelope is 49.2125x90x46.2 mm with a spherical outside surface; mass 760 g. Ratings C 35.1/23.2 kN, Pu 0.98 kN, limiting speed 4,000 r/min." }, { "q": "What does the designation YSP 210-115 SB-2F mean?", "a": "reading YSP: SKF ConCentra technology locks the shaft through a stepped sleeve that contracts uniformly, chosen for high run-out accuracy and for shafts that must not be marked by screw points or an eccentric. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -115 = 49.212 mm, which is why this row sits beside, not on, the metric bore size. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution." }, { "q": "What is SKF ConCentra locking?", "a": "A stepped (multi-diameter) sleeve between the shaft and the tapered/stepped inner-ring seat is driven axially until it contracts uniformly around the shaft — full-circumference grip, low run-out and no screw-point indentations or eccentric imbalance." }, { "q": "Can the locking sleeve be reused?", "a": "Usually not after a full service life or an over-torqued first mounting: the stepped sleeve takes a permanent set. SKF recommends a new sleeve whenever the bearing is replaced on the same shaft." } ], "cross_ref": [ { "equiv_sku": "YSPAG-210-115", "equiv_brand": "SKF", "level": "full", "note": "Same 49.2125x90x46.2 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSPAG 210-115 is the SKF ConCentra stepped-sleeve locking execution of this size — boundary dimensions interchangeable, locking/seal execution differs." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSP-210-115-SB-2F", "YSP 210-115 SB-2F" ], "locale_variants": {} }, { "sku": "YSP-211-200-SB-2F", "brand": "SKF", "manufacturer_designation": "YSP 211-200 SB-2F", "series": "YSP2-series", "type": "insert", "d_mm": 50.8, "D_mm": 100, "B_mm": 49.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 43.6, "static_load_kN": 29, "fatigue_load_limit_kN": 1.25, "limiting_speed_rpm": 3600, "max_rpm": 3600, "weight_g": 1100, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YSP2 series order number YSP 211-200 SB-2F is a SKF insert bearing (Y-bearing) for a 50.8 mm (2 in) shaft: SKF ConCentra insert bearing with concentric stepped-sleeve locking and symmetrically extended inner ring, built to the ISO 15 diameter-series envelope with a sphered OD of 100 mm. Inside is a capped ball insert whose extended inner ring tapers onto a multi-step locking sleeve; the sleeve grips the shaft around its full circumference and the spherical outer ring pivots in the housing. YSP denotes the ConCentra design — the SB execution in this chapter has the shortened inner ring; axial driving of the stepped sleeve produces a near-true concentric clamp with virtually no run-out penalty. inch bore code -200 decodes as 2\", i.e. 50.8 mm; the metric coded size YSP 211 shares the same envelope but its bore is the metric value, not this one. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 50.8x100x49.2 mm (2x3.937x1.937 in), outer ring 25 mm wide, C 43.6 kN, C0 29 kN, Pu 1.25 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,600 r/min; mass 1100 g. Fatigue-limit check: Pu 1.25 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YSP 211-200 SB-2F — most belt-driven mounted-unit loads sit comfortably under 2.867 % of C. Bore-to-OD planning: OD 100 over bore 50.8 is a 1.969x step, while bore/overall-width gives 1.033; the spherical seat in the matching Y-housing must be specified to the 100 mm OD, not to a cylindrical housing bore. Load balance for documentation: C0 29 kN against C 43.6 kN gives a 0.665 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. The s1 29.2 mm dimension is printed for the locking zone — the pre-drive position of the ConCentra stepped sleeve — and it is verified at mounting, not recoverable from d/D/B alone. Pitch-diameter arithmetic: dm = (50.8+100)/2 = 75.4 mm; at the 3,600 r/min limiting speed the ball set runs at dn approx 2.71x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. ConCentra mounting note: the SB shortened-inner-ring sleeve is driven AXIALLY with the proper sleeve/drift until it seats against the abutment — driving at an angle burrs the stepped sleeve and destroys the concentricity advantage; removal needs the matching withdrawal technique, never a puller on the flingers. Reuse note for YSP-211-200-SB-2F: the stepped locking sleeve is a one-time clamping component in most over-torque cases; if the 50.8 mm shaft shows a polished sleeve imprint after withdrawal, fit a new sleeve rather than re-driving the old one.", "applications": [ "fan and blower positions sensitive to imbalance", "food and packaging conveyors", "vibrating conveyors and sieves where screws loosen" ], "failure_modes": [ "puller applied to the sealed outer side during removal destroys flingers and seals instead of releasing the sleeve", "sleeve re-driven after a first seating without cleaning gives false drive-up and creep under load", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "Inspect the shaft before sleeve mounting: a single deep keyway burr or old screw-point dimple under the 49.2 mm-wide sleeve causes a local unclamped arc that later frets.", "ConCentra solves run-out and fretting but not gross misalignment — the housing spherical seat still carries that function; do not use the sleeve grip as an excuse to skip housing alignment.", "The SB shortened-inner-ring ConCentra unit needs its matching mounting sleeve and procedure; substituting a standard YSP sleeve or a generic drift is the usual cause of crooked drive-up on the 50.8 mm shaft.", "The 43.6/29 kN figures belong specifically to YSP 211-200 SB-2F; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSP-211-200-SB-2F?", "a": "Boundary dimensions: bore 50.8 mm, sphered OD 100 mm, overall width 49.2 mm; weight 1100 g. Loads: dynamic 43.6 kN, static 29 kN, fatigue 1.25 kN; the only published speed is the 3,600 r/min limiting value." }, { "q": "What does the designation YSP 211-200 SB-2F mean?", "a": "YSP denotes the ConCentra design — the SB execution in this chapter has the shortened inner ring; axial driving of the stepped sleeve produces a near-true concentric clamp with virtually no run-out penalty. inch bore code -200 decodes as 2\", i.e. 50.8 mm; the metric coded size YSP 211 shares the same envelope but its bore is the metric value, not this one. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "What is SKF ConCentra locking?", "a": "A stepped (multi-diameter) sleeve between the shaft and the tapered/stepped inner-ring seat is driven axially until it contracts uniformly around the shaft — full-circumference grip, low run-out and no screw-point indentations or eccentric imbalance." }, { "q": "Can the locking sleeve be reused?", "a": "Usually not after a full service life or an over-torqued first mounting: the stepped sleeve takes a permanent set. SKF recommends a new sleeve whenever the bearing is replaced on the same shaft." } ], "cross_ref": [ { "equiv_sku": "YSP", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSP-211-200-SB-2F", "YSP 211-200 SB-2F" ], "locale_variants": {} }, { "sku": "YSP-211-203-SB-2F", "brand": "SKF", "manufacturer_designation": "YSP 211-203 SB-2F", "series": "YSP2-series", "type": "insert", "d_mm": 55.5625, "D_mm": 100, "B_mm": 49.2, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 43.6, "static_load_kN": 29, "fatigue_load_limit_kN": 1.25, "limiting_speed_rpm": 3600, "max_rpm": 3600, "weight_g": 970, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YSP 211-203 SB-2F is SKF's 55.5625 mm-bore SKF ConCentra insert bearing with concentric stepped-sleeve locking and symmetrically extended inner ring in the YSP2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 55.5625x100x49.2 mm. The ConCentra principle replaces point or eccentric clamping: a stepped sleeve between shaft and inner ring is driven axially to contract uniformly, concentric with the sphered-OD sealed ball insert. the YSP prefix names SKF ConCentra locking: a stepped (multi-diameter) sleeve between shaft and inner ring is driven axially to grip concentrically, avoiding the local shaft fretting of set screws or the imbalance of an eccentric collar. the three-digit -203 tail codes the bore in inches for inch-shaft bearings: 2 whole inch 3/16 in = 55.563 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 55.5625x100x49.2 mm (2.188x3.937x1.937 in), outer ring 25 mm wide, C 43.6 kN, C0 29 kN, Pu 1.25 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,600 r/min; mass 970 g. Bore-to-OD planning: OD 100 over bore 55.5625 is a 1.8x step, while bore/overall-width gives 1.129; the spherical seat in the matching Y-housing must be specified to the 100 mm OD, not to a cylindrical housing bore. Capacity density: 43.6 kN from 0.970 kg of bearing steel is about 44.948 kN per kilogram, and per width millimetre the 49.2 mm unit carries 0.886 kN of dynamic capacity. Fillet discipline: the printed minimum-fillet limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 55.5625x100 mm insert on its chamfer tilts the whole spherical seat. Grease-life arithmetic is dominated by speed: at dn approx 2.80x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Speed ceiling of 3,600 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. ConCentra mounting note: the SB shortened-inner-ring sleeve is driven AXIALLY with the proper sleeve/drift until it seats against the abutment — driving at an angle burrs the stepped sleeve and destroys the concentricity advantage; removal needs the matching withdrawal technique, never a puller on the flingers. Reuse note for YSP-211-203-SB-2F: the stepped locking sleeve is a one-time clamping component in most over-torque cases; if the 55.5625 mm shaft shows a polished sleeve imprint after withdrawal, fit a new sleeve rather than re-driving the old one.", "applications": [ "heavily vibrating screen and feeder shafts", "large fan positions with dynamic balancing requirements", "process-industry roller beds" ], "failure_modes": [ "sleeve re-driven after a first seating without cleaning gives false drive-up and creep under load", "puller applied to the sealed outer side during removal destroys flingers and seals instead of releasing the sleeve", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "The SB shortened-inner-ring ConCentra unit needs its matching mounting sleeve and procedure; substituting a standard YSP sleeve or a generic drift is the usual cause of crooked drive-up on the 55.5625 mm shaft.", "ConCentra solves run-out and fretting but not gross misalignment — the housing spherical seat still carries that function; do not use the sleeve grip as an excuse to skip housing alignment.", "Inspect the shaft before sleeve mounting: a single deep keyway burr or old screw-point dimple under the 49.2 mm-wide sleeve causes a local unclamped arc that later frets.", "Catalogue ratings belong to YSP 211-203 SB-2F as the concentra two f execution; other order numbers of the YSP 211-203 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSP-211-203-SB-2F?", "a": "YSP 211-203 SB-2F measures 55.5625 mm bore x 100 mm OD x 49.2 mm overall width (outer ring 25 mm wide), 2.188 x 3.937 x 1.937 in; mass about 970 g. SKF 17000 ratings: C 43.6 kN, C0 29 kN, Pu 1.25 kN, limiting speed 3,600 r/min." }, { "q": "What does the designation YSP 211-203 SB-2F mean?", "a": "the YSP prefix names SKF ConCentra locking: a stepped (multi-diameter) sleeve between shaft and inner ring is driven axially to grip concentrically, avoiding the local shaft fretting of set screws or the imbalance of an eccentric collar. the three-digit -203 tail codes the bore in inches for inch-shaft bearings: 2 whole inch 3/16 in = 55.563 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "What does SB mean in YSP 211-203 SB-2F?", "a": "SB identifies the ConCentra ball bearing with a shortened inner ring; the overall width is shorter than the non-SB ConCentra design while keeping the concentric sleeve lock and the -2F seal/flinger package." }, { "q": "What is SKF ConCentra locking?", "a": "A stepped (multi-diameter) sleeve between the shaft and the tapered/stepped inner-ring seat is driven axially until it contracts uniformly around the shaft — full-circumference grip, low run-out and no screw-point indentations or eccentric imbalance." } ], "cross_ref": [ { "equiv_sku": "YSP", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSP-211-203-SB-2F", "YSP 211-203 SB-2F" ], "locale_variants": {} }, { "sku": "YSP-212-204-SB-2F", "brand": "SKF", "manufacturer_designation": "YSP 212-204 SB-2F", "series": "YSP2-series", "type": "insert", "d_mm": 57.15, "D_mm": 110, "B_mm": 51.7, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 52.7, "static_load_kN": 36, "fatigue_load_limit_kN": 1.53, "limiting_speed_rpm": 3400, "max_rpm": 3400, "weight_g": 1350, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YSP2 series order number YSP 212-204 SB-2F is a SKF insert bearing (Y-bearing) for a 57.15 mm (2.25 in) shaft: SKF ConCentra insert bearing with concentric stepped-sleeve locking and symmetrically extended inner ring, built to the ISO 15 diameter-series envelope with a sphered OD of 110 mm. Inside is a capped ball insert whose extended inner ring tapers onto a multi-step locking sleeve; the sleeve grips the shaft around its full circumference and the spherical outer ring pivots in the housing. YSP denotes the ConCentra design — the SB execution in this chapter has the shortened inner ring; axial driving of the stepped sleeve produces a near-true concentric clamp with virtually no run-out penalty. inch bore code -204 decodes as 2\" +4/16, i.e. 57.15 mm; the metric coded size YSP 212 shares the same envelope but its bore is the metric value, not this one. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 57.15x110x51.7 mm (2.25x4.331x2.035 in), outer ring 26 mm wide, C 52.7 kN, C0 36 kN, Pu 1.53 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,400 r/min; mass 1350 g. Spherical-seat note in numbers: the 110 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 83.575 = 262.559 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Speed ceiling of 3,400 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Load balance for documentation: C0 36 kN against C 52.7 kN gives a 0.683 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Mass-to-load ratio for YSP-212-204-SB-2F: 25.617 g of catalogue mass per rated kN of C, and 23.622 g per millimetre of bore — useful when comparing executions of the same 57.15x110 mm envelope on the drawing. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 75.64 mm, d2 83 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the plain flinger. ConCentra mounting note: the SB shortened-inner-ring sleeve is driven AXIALLY with the proper sleeve/drift until it seats against the abutment — driving at an angle burrs the stepped sleeve and destroys the concentricity advantage; removal needs the matching withdrawal technique, never a puller on the flingers. Reuse note for YSP-212-204-SB-2F: the stepped locking sleeve is a one-time clamping component in most over-torque cases; if the 57.15 mm shaft shows a polished sleeve imprint after withdrawal, fit a new sleeve rather than re-driving the old one.", "applications": [ "large fan positions with dynamic balancing requirements", "heavily vibrating screen and feeder shafts", "process-industry roller beds" ], "failure_modes": [ "undersized/over-toleranced shaft never reaches full sleeve grip despite correct drive-up", "puller applied to the sealed outer side during removal destroys flingers and seals instead of releasing the sleeve", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "ConCentra solves run-out and fretting but not gross misalignment — the housing spherical seat still carries that function; do not use the sleeve grip as an excuse to skip housing alignment.", "Inspect the shaft before sleeve mounting: a single deep keyway burr or old screw-point dimple under the 51.7 mm-wide sleeve causes a local unclamped arc that later frets.", "The SB shortened-inner-ring ConCentra unit needs its matching mounting sleeve and procedure; substituting a standard YSP sleeve or a generic drift is the usual cause of crooked drive-up on the 57.15 mm shaft.", "Ordering discipline for the 57.15 mm size: the chapter lists several executions side by side (YSP2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSP-212-204-SB-2F?", "a": "Boundary dimensions: bore 57.15 mm, sphered OD 110 mm, overall width 51.7 mm; weight 1350 g. Loads: dynamic 52.7 kN, static 36 kN, fatigue 1.53 kN; the only published speed is the 3,400 r/min limiting value." }, { "q": "What does the designation YSP 212-204 SB-2F mean?", "a": "YSP denotes the ConCentra design — the SB execution in this chapter has the shortened inner ring; axial driving of the stepped sleeve produces a near-true concentric clamp with virtually no run-out penalty. inch bore code -204 decodes as 2\" +4/16, i.e. 57.15 mm; the metric coded size YSP 212 shares the same envelope but its bore is the metric value, not this one. the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "What does SB mean in YSP 212-204 SB-2F?", "a": "SB identifies the ConCentra ball bearing with a shortened inner ring; the overall width is shorter than the non-SB ConCentra design while keeping the concentric sleeve lock and the -2F seal/flinger package." }, { "q": "What is SKF ConCentra locking?", "a": "A stepped (multi-diameter) sleeve between the shaft and the tapered/stepped inner-ring seat is driven axially until it contracts uniformly around the shaft — full-circumference grip, low run-out and no screw-point indentations or eccentric imbalance." } ], "cross_ref": [ { "equiv_sku": "YSP", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSP-212-204-SB-2F", "YSP 212-204 SB-2F" ], "locale_variants": {} }, { "sku": "YSP-212-207-SB-2F", "brand": "SKF", "manufacturer_designation": "YSP 212-207 SB-2F", "series": "YSP2-series", "type": "insert", "d_mm": 61.912499999999994, "D_mm": 110, "B_mm": 51.7, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 52.7, "static_load_kN": 36, "fatigue_load_limit_kN": 1.53, "limiting_speed_rpm": 3400, "max_rpm": 3400, "weight_g": 1200, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YSP 212-207 SB-2F is SKF's 61.912499999999994 mm-bore SKF ConCentra insert bearing with concentric stepped-sleeve locking and symmetrically extended inner ring in the YSP2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 61.912499999999994x110x51.7 mm. The ConCentra principle replaces point or eccentric clamping: a stepped sleeve between shaft and inner ring is driven axially to contract uniformly, concentric with the sphered-OD sealed ball insert. the YSP prefix names SKF ConCentra locking: a stepped (multi-diameter) sleeve between shaft and inner ring is driven axially to grip concentrically, avoiding the local shaft fretting of set screws or the imbalance of an eccentric collar. the three-digit -207 tail codes the bore in inches for inch-shaft bearings: 2 whole inch 7/16 in = 61.912 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 61.912499999999994x110x51.7 mm (2.438x4.331x2.035 in), outer ring 26 mm wide, C 52.7 kN, C0 36 kN, Pu 1.53 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,400 r/min; mass 1200 g. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 75.64 mm, d2 87.6 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the plain flinger. Envelope arithmetic: the radial section from 61.912499999999994 mm bore to 110 mm OD is 24.044 mm; dividing C 52.7 kN by that section gives 2.192 kN per section millimetre, and the 51.7 mm overall width is 2.15x the section. The s1 30.5 mm dimension is printed for the locking zone — the pre-drive position of the ConCentra stepped sleeve — and it is verified at mounting, not recoverable from d/D/B alone. Pitch-diameter arithmetic: dm = (61.912499999999994+110)/2 = 85.956 mm; at the 3,400 r/min limiting speed the ball set runs at dn approx 2.92x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Width accounting on this execution: 51.7 mm overall and 26 mm outer-ring width leave the housing designer 25.7 mm of inner-ring projection to accommodate the locking arrangement. ConCentra mounting note: the SB shortened-inner-ring sleeve is driven AXIALLY with the proper sleeve/drift until it seats against the abutment — driving at an angle burrs the stepped sleeve and destroys the concentricity advantage; removal needs the matching withdrawal technique, never a puller on the flingers. Reuse note for YSP-212-207-SB-2F: the stepped locking sleeve is a one-time clamping component in most over-torque cases; if the 61.912499999999994 mm shaft shows a polished sleeve imprint after withdrawal, fit a new sleeve rather than re-driving the old one.", "applications": [ "process-industry roller beds", "large fan positions with dynamic balancing requirements", "heavily vibrating screen and feeder shafts" ], "failure_modes": [ "puller applied to the sealed outer side during removal destroys flingers and seals instead of releasing the sleeve", "sleeve re-driven after a first seating without cleaning gives false drive-up and creep under load", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "relubricated with incompatible grease that hardens the factory fill and drags the seals" ], "pitfalls": [ "The SB shortened-inner-ring ConCentra unit needs its matching mounting sleeve and procedure; substituting a standard YSP sleeve or a generic drift is the usual cause of crooked drive-up on the 61.912499999999994 mm shaft.", "Inspect the shaft before sleeve mounting: a single deep keyway burr or old screw-point dimple under the 51.7 mm-wide sleeve causes a local unclamped arc that later frets.", "ConCentra solves run-out and fretting but not gross misalignment — the housing spherical seat still carries that function; do not use the sleeve grip as an excuse to skip housing alignment.", "Catalogue ratings belong to YSP 212-207 SB-2F as the concentra two f execution; other order numbers of the YSP 212-207 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSP-212-207-SB-2F?", "a": "YSP 212-207 SB-2F measures 61.912499999999994 mm bore x 110 mm OD x 51.7 mm overall width (outer ring 26 mm wide), 2.438 x 4.331 x 2.035 in; mass about 1200 g. SKF 17000 ratings: C 52.7 kN, C0 36 kN, Pu 1.53 kN, limiting speed 3,400 r/min." }, { "q": "What does the designation YSP 212-207 SB-2F mean?", "a": "the YSP prefix names SKF ConCentra locking: a stepped (multi-diameter) sleeve between shaft and inner ring is driven axially to grip concentrically, avoiding the local shaft fretting of set screws or the imbalance of an eccentric collar. the three-digit -207 tail codes the bore in inches for inch-shaft bearings: 2 whole inch 7/16 in = 61.912 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "What is SKF ConCentra locking?", "a": "A stepped (multi-diameter) sleeve between the shaft and the tapered/stepped inner-ring seat is driven axially until it contracts uniformly around the shaft — full-circumference grip, low run-out and no screw-point indentations or eccentric imbalance." }, { "q": "Can the locking sleeve be reused?", "a": "Usually not after a full service life or an over-torqued first mounting: the stepped sleeve takes a permanent set. SKF recommends a new sleeve whenever the bearing is replaced on the same shaft." } ], "cross_ref": [ { "equiv_sku": "YSP", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSP-212-207-SB-2F", "YSP 212-207 SB-2F" ], "locale_variants": {} }, { "sku": "YSP-213-211-SB-2F", "brand": "SKF", "manufacturer_designation": "YSP 213-211 SB-2F", "series": "YSP2-series", "type": "insert", "d_mm": 68.2625, "D_mm": 120, "B_mm": 52.7, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 57.2, "static_load_kN": 40, "fatigue_load_limit_kN": 1.7, "limiting_speed_rpm": 3000, "max_rpm": 3000, "weight_g": 1400, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YSP 213-211 SB-2F is SKF's 68.2625 mm-bore SKF ConCentra insert bearing with concentric stepped-sleeve locking and symmetrically extended inner ring in the YSP2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 68.2625x120x52.7 mm. The ConCentra principle replaces point or eccentric clamping: a stepped sleeve between shaft and inner ring is driven axially to contract uniformly, concentric with the sphered-OD sealed ball insert. the YSP prefix names SKF ConCentra locking: a stepped (multi-diameter) sleeve between shaft and inner ring is driven axially to grip concentrically, avoiding the local shaft fretting of set screws or the imbalance of an eccentric collar. the three-digit -211 tail codes the bore in inches for inch-shaft bearings: 2 whole inch 11/16 in = 68.263 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 68.2625x120x52.7 mm (2.688x4.724x2.075 in), outer ring 27 mm wide, C 57.2 kN, C0 40 kN, Pu 1.7 kN. The catalogue publishes a single speed ceiling, the limiting speed: 3,000 r/min; mass 1400 g. At the printed limiting speed of 3,000 r/min the mean diameter dm = 94.131 mm implies dn about 2.82x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Bore-to-OD planning: OD 120 over bore 68.2625 is a 1.758x step, while bore/overall-width gives 1.295; the spherical seat in the matching Y-housing must be specified to the 120 mm OD, not to a cylindrical housing bore. The s1 31 mm dimension is printed for the locking zone — the pre-drive position of the ConCentra stepped sleeve — and it is verified at mounting, not recoverable from d/D/B alone. Static-first planning: the 0.759 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 68.2625 mm shaft, not the 57.2 kN L10 value. Envelope arithmetic: the radial section from 68.2625 mm bore to 120 mm OD is 25.869 mm; dividing C 57.2 kN by that section gives 2.211 kN per section millimetre, and the 52.7 mm overall width is 2.037x the section. ConCentra mounting note: the SB shortened-inner-ring sleeve is driven AXIALLY with the proper sleeve/drift until it seats against the abutment — driving at an angle burrs the stepped sleeve and destroys the concentricity advantage; removal needs the matching withdrawal technique, never a puller on the flingers. Reuse note for YSP-213-211-SB-2F: the stepped locking sleeve is a one-time clamping component in most over-torque cases; if the 68.2625 mm shaft shows a polished sleeve imprint after withdrawal, fit a new sleeve rather than re-driving the old one.", "applications": [ "process-industry roller beds", "large fan positions with dynamic balancing requirements", "heavily vibrating screen and feeder shafts" ], "failure_modes": [ "puller applied to the sealed outer side during removal destroys flingers and seals instead of releasing the sleeve", "sleeve re-driven after a first seating without cleaning gives false drive-up and creep under load", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "relubricated with incompatible grease that hardens the factory fill and drags the seals" ], "pitfalls": [ "Inspect the shaft before sleeve mounting: a single deep keyway burr or old screw-point dimple under the 52.7 mm-wide sleeve causes a local unclamped arc that later frets.", "The SB shortened-inner-ring ConCentra unit needs its matching mounting sleeve and procedure; substituting a standard YSP sleeve or a generic drift is the usual cause of crooked drive-up on the 68.2625 mm shaft.", "ConCentra solves run-out and fretting but not gross misalignment — the housing spherical seat still carries that function; do not use the sleeve grip as an excuse to skip housing alignment.", "The 57.2/40 kN figures belong specifically to YSP 213-211 SB-2F; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSP-213-211-SB-2F?", "a": "YSP 213-211 SB-2F measures 68.2625 mm bore x 120 mm OD x 52.7 mm overall width (outer ring 27 mm wide), 2.688 x 4.724 x 2.075 in; mass about 1400 g. SKF 17000 ratings: C 57.2 kN, C0 40 kN, Pu 1.7 kN, limiting speed 3,000 r/min." }, { "q": "What does the designation YSP 213-211 SB-2F mean?", "a": "the YSP prefix names SKF ConCentra locking: a stepped (multi-diameter) sleeve between shaft and inner ring is driven axially to grip concentrically, avoiding the local shaft fretting of set screws or the imbalance of an eccentric collar. the three-digit -211 tail codes the bore in inches for inch-shaft bearings: 2 whole inch 11/16 in = 68.263 mm (first digit whole inches, next two sixteenths of an inch). suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "What is SKF ConCentra locking?", "a": "A stepped (multi-diameter) sleeve between the shaft and the tapered/stepped inner-ring seat is driven axially until it contracts uniformly around the shaft — full-circumference grip, low run-out and no screw-point indentations or eccentric imbalance." }, { "q": "Can the locking sleeve be reused?", "a": "Usually not after a full service life or an over-torqued first mounting: the stepped sleeve takes a permanent set. SKF recommends a new sleeve whenever the bearing is replaced on the same shaft." } ], "cross_ref": [ { "equiv_sku": "YSP", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSP-213-211-SB-2F", "YSP 213-211 SB-2F" ], "locale_variants": {} }, { "sku": "YSA-205-2FK-H-2305", "brand": "SKF", "manufacturer_designation": "YSA 205-2FK H 2305", "series": "YSA2-series", "type": "insert", "d_mm": 20, "D_mm": 52, "B_mm": 24, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 14, "static_load_kN": 7.8, "fatigue_load_limit_kN": 0.335, "limiting_speed_rpm": 7000, "max_rpm": 7000, "weight_g": 250, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YSA 205-2FK H 2305 is a tapered-bore (1:12) insert bearing supplied on its H 2305 adapter sleeve, 20x52x24 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction combines capped deep-groove geometry, a tapered inner-ring bore and the supplied adapter sleeve with locknut seating — factory-grade concentricity on plain drawn shafting. YSA is the adapter-sleeve member of the Y range — tapered bore plus the H 2305 sleeve converts a plain commercial shaft into a precisely located, demountable seat at 20 mm. adapter mounting means the effective bore is the sleeve bore: H 2305 gives the 20 mm shaft fit with no machined shoulder required. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution. Envelope 20x52x24 mm (0.787x2.047x0.945 in), outer ring 15 mm wide, C 14 kN, C0 7.8 kN, Pu 0.335 kN. Mounted width B1 35 mm includes the adapter sleeve. Supplied/specified with H 2305. The catalogue publishes a single speed ceiling, the limiting speed: 7,000 r/min; mass 250 g. Grease-life arithmetic is dominated by speed: at dn approx 2.52x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Imperial procurement cross-check: 0.787 in bore, 2.047 in OD, 0.945 in overall width; the 250 g mass converts to 0.250 kg (8.8 oz) for the bill of materials. Fillet discipline: the printed minimum-fillet limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 20x52 mm insert on its chamfer tilts the whole spherical seat. The s1 20.5 mm dimension is printed for the locking zone — the distance before the adapter sleeve is driven up the taper — and it is verified at mounting, not recoverable from d/D/B alone. At the printed limiting speed of 7,000 r/min the mean diameter dm = 36 mm implies dn about 2.52x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Adapter-sleeve note: tighten the sleeve locknut to the catalogue axial drive-up (s1 is printed as the starting distance before the sleeve is driven into the tapered bore); under-tightening lets the inner ring creep, over-tightening eliminates internal clearance and preloads the balls hot. Mounting sequence for YSA-205-2FK-H-2305: slide H 2305 on first, seat the bearing in the housing register, then draw the nut to drive-up — reversing the order (sleeve fully tightened before housing engagement) locks in misalignment the sphered seat cannot cure.", "applications": [ "light transmission shafts without shoulders", "small fans on plain drawn shafts" ], "failure_modes": [ "locknut not secured (no tab or thread locking): the sleeve unwinds under vibration and the unit collapses axially", "shaft shoulder absent or too small: the sleeve pulls through the bore instead of reacting the drive-up", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "The order number is incomplete without the sleeve: YSA-205-2FK-H-2305 specifies the H 2305 adapter as part of the article; quoting only the YSA bearing risks delivery of a sleeve-less tapered bore that cannot mount.", "Plain-shaft advantage is also its trap: with no shoulders, axial location comes entirely from the sleeve/nut reaction — the abutment behind the sleeve must be square and present.", "Sleeve drive-up uses the printed s1 20.5 mm starting distance, not a torque value guessed from locknut size; re-measure the residual gap after tightening rather than trusting feel.", "Catalogue ratings belong to YSA 205-2FK H 2305 as the adapter two f execution; other order numbers of the YSA 205-2FK size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSA-205-2FK-H-2305?", "a": "The catalogue envelope is 20x52x24 mm with a spherical outside surface; mass 250 g. Ratings C 14/7.8 kN, Pu 0.335 kN, limiting speed 7,000 r/min." }, { "q": "What does the designation YSA 205-2FK H 2305 mean?", "a": "YSA is the adapter-sleeve member of the Y range — tapered bore plus the H 2305 sleeve converts a plain commercial shaft into a precisely located, demountable seat at 20 mm. adapter mounting means the effective bore is the sleeve bore: H 2305 gives the 20 mm shaft fit with no machined shoulder required. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution." }, { "q": "How tight should the adapter sleeve be?", "a": "Drive-up is controlled by the printed axial procedure using the s1 starting distance (20.5 mm for this size). Too loose creeps; too tight removes internal clearance and overheats the ball set. Secure the locknut when finished." }, { "q": "What is the difference between H, HA and HE sleeves?", "a": "H sleeves fit metric shafts while HA/HE cover inch-shaft sizes of the same tapered insert; the sleeve designation, not the bearing code, determines the actual shaft diameter — always specify the bearing AND sleeve together." } ], "cross_ref": [ { "equiv_sku": "YSA", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSA-205-2FK-H-2305", "YSA 205-2FK H 2305" ], "locale_variants": {} }, { "sku": "YSA-206-2FK-H-2306", "brand": "SKF", "manufacturer_designation": "YSA 206-2FK H 2306", "series": "YSA2-series", "type": "insert", "d_mm": 25, "D_mm": 62, "B_mm": 28, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 19.5, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 6300, "max_rpm": 6300, "weight_g": 380, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YSA 206-2FK H 2306 is SKF's 25 mm-bore tapered-bore (1:12) insert bearing supplied on its H 2306 adapter sleeve in the YSA2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 25x62x28 mm. The inner ring carries a 1:12 tapered bore and mounts on the specified adapter sleeve: tightening the sleeve nut draws the ring home on a plain shaft, while the sphered outer ring pivots in the Y-housing. YSA names the tapered-bore (K, 1:12 taper) insert mounted on an adapter sleeve: the H 2306 sleeve is drawn up the taper to clamp a plain 25 mm shaft with a locknut, giving the concentricity and easy mounting of adapter-sleeve bearings. the shaft diameter is set by the H 2306 adapter sleeve, not by the bearing code: the sleeve seats a 25 mm plain shaft under the tapered bore. suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 25x62x28 mm (0.984x2.441x1.102 in), outer ring 18 mm wide, C 19.5 kN, C0 11.2 kN, Pu 0.475 kN. Mounted width B1 38 mm includes the adapter sleeve. Supplied/specified with H 2306. The catalogue publishes a single speed ceiling, the limiting speed: 6,300 r/min; mass 380 g. Static-first planning: the 0.4 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 25 mm shaft, not the 19.5 kN L10 value. Bore-to-OD planning: OD 62 over bore 25 is a 2.48x step, while bore/overall-width gives 0.893; the spherical seat in the matching Y-housing must be specified to the 62 mm OD, not to a cylindrical housing bore. Rating split for the maintenance file: dynamic 19.5 kN (L10), static 11.2 kN (s0 shock check), fatigue 0.475 kN (adjusted life) — three separate uses for YSA 206-2FK H 2306, none interchangeable with another. Envelope arithmetic: the radial section from 25 mm bore to 62 mm OD is 18.5 mm; dividing C 19.5 kN by that section gives 1.054 kN per section millimetre, and the 28 mm overall width is 1.514x the section. The s1 22.5 mm dimension is printed for the locking zone — the distance before the adapter sleeve is driven up the taper — and it is verified at mounting, not recoverable from d/D/B alone. Adapter-sleeve note: tighten the sleeve locknut to the catalogue axial drive-up (s1 is printed as the starting distance before the sleeve is driven into the tapered bore); under-tightening lets the inner ring creep, over-tightening eliminates internal clearance and preloads the balls hot. Sleeve geometry on YSA-206-2FK-H-2306: H 2306 pulls the tapered inner ring onto the 25 mm plain shaft; the printed s1 22.5 mm is the pre-drive distance and 38 mm is the overall width including the sleeve hardware.", "applications": [ "fan and blower shafts of plain commercial steel", "ventilation equipment with long through-shafts", "general transmission arrangements on h6 plain shafts" ], "failure_modes": [ "shaft shoulder absent or too small: the sleeve pulls through the bore instead of reacting the drive-up", "sleeve over-tightened: internal clearance vanishes and the bearing runs hot from the first hours", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "Sleeve drive-up uses the printed s1 22.5 mm starting distance, not a torque value guessed from locknut size; re-measure the residual gap after tightening rather than trusting feel.", "Plain-shaft advantage is also its trap: with no shoulders, axial location comes entirely from the sleeve/nut reaction — the abutment behind the sleeve must be square and present.", "The order number is incomplete without the sleeve: YSA-206-2FK-H-2306 specifies the H 2306 adapter as part of the article; quoting only the YSA bearing risks delivery of a sleeve-less tapered bore that cannot mount.", "The 19.5/11.2 kN figures belong specifically to YSA 206-2FK H 2306; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSA-206-2FK-H-2306?", "a": "YSA 206-2FK H 2306 measures 25 mm bore x 62 mm OD x 28 mm overall width (outer ring 18 mm wide), 0.984 x 2.441 x 1.102 in; mass about 380 g. SKF 17000 ratings: C 19.5 kN, C0 11.2 kN, Pu 0.475 kN, limiting speed 6,300 r/min." }, { "q": "What does the designation YSA 206-2FK H 2306 mean?", "a": "YSA names the tapered-bore (K, 1:12 taper) insert mounted on an adapter sleeve: the H 2306 sleeve is drawn up the taper to clamp a plain 25 mm shaft with a locknut, giving the concentricity and easy mounting of adapter-sleeve bearings. the shaft diameter is set by the H 2306 adapter sleeve, not by the bearing code: the sleeve seats a 25 mm plain shaft under the tapered bore. suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "Why is the bore tapered and what is the H 2306 sleeve?", "a": "The inner ring has a 1:12 tapered bore (K); the H 2306 adapter sleeve is drawn between taper and a plain 25 mm shaft by a locknut, giving a precise, demountable concentric seat without shaft shoulders." }, { "q": "What shaft preparation is needed?", "a": "A plain commercial shaft in the recommended tolerance, clean and free of burrs, with a light abutment for the sleeve face. No shoulders, dimples or collar space are required — that is the main advantage of adapter mounting." } ], "cross_ref": [ { "equiv_sku": "YSA-206-2FK-HE-2306", "equiv_brand": "SKF", "level": "full", "note": "Same 25x62x28 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSA 206-2FK HE 2306 is the tapered bore on HE 2306 adapter sleeve execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25 mm vs 25.4 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSA-206-2FK-H-2306", "YSA 206-2FK H 2306" ], "locale_variants": {} }, { "sku": "YSA-207-2FK-H-2307", "brand": "SKF", "manufacturer_designation": "YSA 207-2FK H 2307", "series": "YSA2-series", "type": "insert", "d_mm": 30, "D_mm": 72, "B_mm": 30.5, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 5300, "max_rpm": 5300, "weight_g": 540, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YSA 207-2FK H 2307 is SKF's 30 mm-bore tapered-bore (1:12) insert bearing supplied on its H 2307 adapter sleeve in the YSA2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 30x72x30.5 mm. The inner ring carries a 1:12 tapered bore and mounts on the specified adapter sleeve: tightening the sleeve nut draws the ring home on a plain shaft, while the sphered outer ring pivots in the Y-housing. YSA names the tapered-bore (K, 1:12 taper) insert mounted on an adapter sleeve: the H 2307 sleeve is drawn up the taper to clamp a plain 30 mm shaft with a locknut, giving the concentricity and easy mounting of adapter-sleeve bearings. the shaft diameter is set by the H 2307 adapter sleeve, not by the bearing code: the sleeve seats a 30 mm plain shaft under the tapered bore. suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 30x72x30.5 mm (1.181x2.835x1.201 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. Mounted width B1 43 mm includes the adapter sleeve. Supplied/specified with H 2307. The catalogue publishes a single speed ceiling, the limiting speed: 5,300 r/min; mass 540 g. Outer-vs-overall width: the outer ring is 19 mm wide inside the 30.5 mm total, so the extended inner ring accounts for 0.377 of the overall width (5.75 mm of axial projection per side). Static-first planning: the 0.502 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 30 mm shaft, not the 25.5 kN L10 value. The s1 24.8 mm dimension is printed for the locking zone — the distance before the adapter sleeve is driven up the taper — and it is verified at mounting, not recoverable from d/D/B alone. Load balance for documentation: C0 15.3 kN against C 25.5 kN gives a 0.6 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Rating split for the maintenance file: dynamic 25.5 kN (L10), static 15.3 kN (s0 shock check), fatigue 0.655 kN (adjusted life) — three separate uses for YSA 207-2FK H 2307, none interchangeable with another. Adapter-sleeve note: tighten the sleeve locknut to the catalogue axial drive-up (s1 is printed as the starting distance before the sleeve is driven into the tapered bore); under-tightening lets the inner ring creep, over-tightening eliminates internal clearance and preloads the balls hot. Mounting sequence for YSA-207-2FK-H-2307: slide H 2307 on first, seat the bearing in the housing register, then draw the nut to drive-up — reversing the order (sleeve fully tightened before housing engagement) locks in misalignment the sphered seat cannot cure.", "applications": [ "conveyor positions needing easy removal without shaft damage", "fan and blower shafts of plain commercial steel", "general transmission arrangements on h6 plain shafts" ], "failure_modes": [ "sleeve under-tightened: the tapered inner ring creeps on the sleeve and polishes the taper bright", "shaft shoulder absent or too small: the sleeve pulls through the bore instead of reacting the drive-up", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "Plain-shaft advantage is also its trap: with no shoulders, axial location comes entirely from the sleeve/nut reaction — the abutment behind the sleeve must be square and present.", "Sleeve drive-up uses the printed s1 24.8 mm starting distance, not a torque value guessed from locknut size; re-measure the residual gap after tightening rather than trusting feel.", "The order number is incomplete without the sleeve: YSA-207-2FK-H-2307 specifies the H 2307 adapter as part of the article; quoting only the YSA bearing risks delivery of a sleeve-less tapered bore that cannot mount.", "Ordering discipline for the 30 mm size: the chapter lists several executions side by side (YSA2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSA-207-2FK-H-2307?", "a": "YSA 207-2FK H 2307 measures 30 mm bore x 72 mm OD x 30.5 mm overall width (outer ring 19 mm wide), 1.181 x 2.835 x 1.201 in; mass about 540 g. SKF 17000 ratings: C 25.5 kN, C0 15.3 kN, Pu 0.655 kN, limiting speed 5,300 r/min." }, { "q": "What does the designation YSA 207-2FK H 2307 mean?", "a": "YSA names the tapered-bore (K, 1:12 taper) insert mounted on an adapter sleeve: the H 2307 sleeve is drawn up the taper to clamp a plain 30 mm shaft with a locknut, giving the concentricity and easy mounting of adapter-sleeve bearings. the shaft diameter is set by the H 2307 adapter sleeve, not by the bearing code: the sleeve seats a 30 mm plain shaft under the tapered bore. suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "How tight should the adapter sleeve be?", "a": "Drive-up is controlled by the printed axial procedure using the s1 starting distance (24.8 mm for this size). Too loose creeps; too tight removes internal clearance and overheats the ball set. Secure the locknut when finished." }, { "q": "What is the difference between H, HA and HE sleeves?", "a": "H sleeves fit metric shafts while HA/HE cover inch-shaft sizes of the same tapered insert; the sleeve designation, not the bearing code, determines the actual shaft diameter — always specify the bearing AND sleeve together." } ], "cross_ref": [ { "equiv_sku": "YSA-207-2FK-HA-2307", "equiv_brand": "SKF", "level": "full", "note": "Same 30x72x30.5 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSA 207-2FK HA 2307 is the tapered bore on HA 2307 adapter sleeve execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30 mm vs 30.15 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSA-207-2FK-H-2307", "YSA 207-2FK H 2307" ], "locale_variants": {} }, { "sku": "YSA-208-2FK-H-2308", "brand": "SKF", "manufacturer_designation": "YSA 208-2FK H 2308", "series": "YSA2-series", "type": "insert", "d_mm": 35, "D_mm": 80, "B_mm": 33.9, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 30.7, "static_load_kN": 19, "fatigue_load_limit_kN": 0.8, "limiting_speed_rpm": 4800, "max_rpm": 4800, "weight_g": 710, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YSA 208-2FK H 2308 is SKF's 35 mm-bore tapered-bore (1:12) insert bearing supplied on its H 2308 adapter sleeve in the YSA2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 35x80x33.9 mm. The inner ring carries a 1:12 tapered bore and mounts on the specified adapter sleeve: tightening the sleeve nut draws the ring home on a plain shaft, while the sphered outer ring pivots in the Y-housing. YSA names the tapered-bore (K, 1:12 taper) insert mounted on an adapter sleeve: the H 2308 sleeve is drawn up the taper to clamp a plain 35 mm shaft with a locknut, giving the concentricity and easy mounting of adapter-sleeve bearings. the shaft diameter is set by the H 2308 adapter sleeve, not by the bearing code: the sleeve seats a 35 mm plain shaft under the tapered bore. suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 35x80x33.9 mm (1.378x3.15x1.335 in), outer ring 21 mm wide, C 30.7 kN, C0 19 kN, Pu 0.8 kN. Mounted width B1 46 mm includes the adapter sleeve. Supplied/specified with H 2308. The catalogue publishes a single speed ceiling, the limiting speed: 4,800 r/min; mass 710 g. Bore-to-OD planning: OD 80 over bore 35 is a 2.286x step, while bore/overall-width gives 1.032; the spherical seat in the matching Y-housing must be specified to the 80 mm OD, not to a cylindrical housing bore. Envelope arithmetic: the radial section from 35 mm bore to 80 mm OD is 22.5 mm; dividing C 30.7 kN by that section gives 1.364 kN per section millimetre, and the 33.9 mm overall width is 1.507x the section. Speed ceiling of 4,800 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Static-first planning: the 0.56 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 35 mm shaft, not the 30.7 kN L10 value. Grease-life arithmetic is dominated by speed: at dn approx 2.76x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Adapter-sleeve note: tighten the sleeve locknut to the catalogue axial drive-up (s1 is printed as the starting distance before the sleeve is driven into the tapered bore); under-tightening lets the inner ring creep, over-tightening eliminates internal clearance and preloads the balls hot. Sleeve geometry on YSA-208-2FK-H-2308: H 2308 pulls the tapered inner ring onto the 35 mm plain shaft; the printed s1 27.5 mm is the pre-drive distance and 46 mm is the overall width including the sleeve hardware.", "applications": [ "ventilation equipment with long through-shafts", "conveyor positions needing easy removal without shaft damage", "fan and blower shafts of plain commercial steel" ], "failure_modes": [ "sleeve over-tightened: internal clearance vanishes and the bearing runs hot from the first hours", "sleeve under-tightened: the tapered inner ring creeps on the sleeve and polishes the taper bright", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "Plain-shaft advantage is also its trap: with no shoulders, axial location comes entirely from the sleeve/nut reaction — the abutment behind the sleeve must be square and present.", "Sleeve drive-up uses the printed s1 27.5 mm starting distance, not a torque value guessed from locknut size; re-measure the residual gap after tightening rather than trusting feel.", "The order number is incomplete without the sleeve: YSA-208-2FK-H-2308 specifies the H 2308 adapter as part of the article; quoting only the YSA bearing risks delivery of a sleeve-less tapered bore that cannot mount.", "Ordering discipline for the 35 mm size: the chapter lists several executions side by side (YSA2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSA-208-2FK-H-2308?", "a": "YSA 208-2FK H 2308 measures 35 mm bore x 80 mm OD x 33.9 mm overall width (outer ring 21 mm wide), 1.378 x 3.15 x 1.335 in; mass about 710 g. SKF 17000 ratings: C 30.7 kN, C0 19 kN, Pu 0.8 kN, limiting speed 4,800 r/min." }, { "q": "What does the designation YSA 208-2FK H 2308 mean?", "a": "YSA names the tapered-bore (K, 1:12 taper) insert mounted on an adapter sleeve: the H 2308 sleeve is drawn up the taper to clamp a plain 35 mm shaft with a locknut, giving the concentricity and easy mounting of adapter-sleeve bearings. the shaft diameter is set by the H 2308 adapter sleeve, not by the bearing code: the sleeve seats a 35 mm plain shaft under the tapered bore. suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "Why is the bore tapered and what is the H 2308 sleeve?", "a": "The inner ring has a 1:12 tapered bore (K); the H 2308 adapter sleeve is drawn between taper and a plain 35 mm shaft by a locknut, giving a precise, demountable concentric seat without shaft shoulders." }, { "q": "What shaft preparation is needed?", "a": "A plain commercial shaft in the recommended tolerance, clean and free of burrs, with a light abutment for the sleeve face. No shoulders, dimples or collar space are required — that is the main advantage of adapter mounting." } ], "cross_ref": [ { "equiv_sku": "YSA", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSA-208-2FK-H-2308", "YSA 208-2FK H 2308" ], "locale_variants": {} }, { "sku": "YSA-209-2FK-H-2309", "brand": "SKF", "manufacturer_designation": "YSA 209-2FK H 2309", "series": "YSA2-series", "type": "insert", "d_mm": 40, "D_mm": 85, "B_mm": 35, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 33.2, "static_load_kN": 21.6, "fatigue_load_limit_kN": 0.915, "limiting_speed_rpm": 4300, "max_rpm": 4300, "weight_g": 840, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YSA 209-2FK H 2309 is a tapered-bore (1:12) insert bearing supplied on its H 2309 adapter sleeve, 40x85x35 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction combines capped deep-groove geometry, a tapered inner-ring bore and the supplied adapter sleeve with locknut seating — factory-grade concentricity on plain drawn shafting. YSA is the adapter-sleeve member of the Y range — tapered bore plus the H 2309 sleeve converts a plain commercial shaft into a precisely located, demountable seat at 40 mm. adapter mounting means the effective bore is the sleeve bore: H 2309 gives the 40 mm shaft fit with no machined shoulder required. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution. Envelope 40x85x35 mm (1.575x3.346x1.378 in), outer ring 22 mm wide, C 33.2 kN, C0 21.6 kN, Pu 0.915 kN. Mounted width B1 50 mm includes the adapter sleeve. Supplied/specified with H 2309. The catalogue publishes a single speed ceiling, the limiting speed: 4,300 r/min; mass 840 g. Rating split for the maintenance file: dynamic 33.2 kN (L10), static 21.6 kN (s0 shock check), fatigue 0.915 kN (adjusted life) — three separate uses for YSA 209-2FK H 2309, none interchangeable with another. Imperial procurement cross-check: 1.575 in bore, 3.346 in OD, 1.378 in overall width; the 840 g mass converts to 0.840 kg (29.6 oz) for the bill of materials. Fillet discipline: the printed minimum-fillet limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 40x85 mm insert on its chamfer tilts the whole spherical seat. The s1 29 mm dimension is printed for the locking zone — the distance before the adapter sleeve is driven up the taper — and it is verified at mounting, not recoverable from d/D/B alone. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 56.8 mm, d3 65 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the plain flinger. Adapter-sleeve note: tighten the sleeve locknut to the catalogue axial drive-up (s1 is printed as the starting distance before the sleeve is driven into the tapered bore); under-tightening lets the inner ring creep, over-tightening eliminates internal clearance and preloads the balls hot. Mounting sequence for YSA-209-2FK-H-2309: slide H 2309 on first, seat the bearing in the housing register, then draw the nut to drive-up — reversing the order (sleeve fully tightened before housing engagement) locks in misalignment the sphered seat cannot cure.", "applications": [ "general transmission arrangements on h6 plain shafts", "fan and blower shafts of plain commercial steel", "ventilation equipment with long through-shafts" ], "failure_modes": [ "locknut not secured (no tab or thread locking): the sleeve unwinds under vibration and the unit collapses axially", "shaft shoulder absent or too small: the sleeve pulls through the bore instead of reacting the drive-up", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "relubricated with incompatible grease that hardens the factory fill and drags the seals" ], "pitfalls": [ "Sleeve drive-up uses the printed s1 29 mm starting distance, not a torque value guessed from locknut size; re-measure the residual gap after tightening rather than trusting feel.", "The order number is incomplete without the sleeve: YSA-209-2FK-H-2309 specifies the H 2309 adapter as part of the article; quoting only the YSA bearing risks delivery of a sleeve-less tapered bore that cannot mount.", "Plain-shaft advantage is also its trap: with no shoulders, axial location comes entirely from the sleeve/nut reaction — the abutment behind the sleeve must be square and present.", "The 33.2/21.6 kN figures belong specifically to YSA 209-2FK H 2309; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSA-209-2FK-H-2309?", "a": "The catalogue envelope is 40x85x35 mm with a spherical outside surface; mass 840 g. Ratings C 33.2/21.6 kN, Pu 0.915 kN, limiting speed 4,300 r/min." }, { "q": "What does the designation YSA 209-2FK H 2309 mean?", "a": "YSA is the adapter-sleeve member of the Y range — tapered bore plus the H 2309 sleeve converts a plain commercial shaft into a precisely located, demountable seat at 40 mm. adapter mounting means the effective bore is the sleeve bore: H 2309 gives the 40 mm shaft fit with no machined shoulder required. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution." }, { "q": "How tight should the adapter sleeve be?", "a": "Drive-up is controlled by the printed axial procedure using the s1 starting distance (29 mm for this size). Too loose creeps; too tight removes internal clearance and overheats the ball set. Secure the locknut when finished." }, { "q": "What is the difference between H, HA and HE sleeves?", "a": "H sleeves fit metric shafts while HA/HE cover inch-shaft sizes of the same tapered insert; the sleeve designation, not the bearing code, determines the actual shaft diameter — always specify the bearing AND sleeve together." } ], "cross_ref": [ { "equiv_sku": "YSA", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSA-209-2FK-H-2309", "YSA 209-2FK H 2309" ], "locale_variants": {} }, { "sku": "YSA-210-2FK-H-2310", "brand": "SKF", "manufacturer_designation": "YSA 210-2FK H 2310", "series": "YSA2-series", "type": "insert", "d_mm": 45, "D_mm": 90, "B_mm": 37, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 35.1, "static_load_kN": 23.2, "fatigue_load_limit_kN": 0.98, "limiting_speed_rpm": 4000, "max_rpm": 4000, "weight_g": 970, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YSA2 series order number YSA 210-2FK H 2310 is a SKF insert bearing (Y-bearing) for a 45 mm shaft: tapered-bore (1:12) insert bearing supplied on its H 2310 adapter sleeve, built to the ISO 15 diameter-series envelope with a sphered OD of 90 mm. Inside is a sealed, symmetrically extended ball insert with a tapered bore, the adapter sleeve converting a plain commercial shaft into a precision seat without shoulders, screw points or collars. reading YSA: the inner-ring bore is tapered 1:12 and the bearing ships/specifies with its H 2310 adapter sleeve; driving the sleeve home locks the plain shaft without shoulders or screw points. read the 45 mm bore from the H 2310 sleeve designation — the YSA code marks the bearing seat size and the sleeve series is offset by one (sleeve code 310 clamps the 45 mm shaft). the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 45x90x37 mm (1.772x3.543x1.457 in), outer ring 22 mm wide, C 35.1 kN, C0 23.2 kN, Pu 0.98 kN. Mounted width B1 55 mm includes the adapter sleeve. Supplied/specified with H 2310. The catalogue publishes a single speed ceiling, the limiting speed: 4,000 r/min; mass 970 g. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 62.5 mm, d3 70 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the plain flinger. Load balance for documentation: C0 23.2 kN against C 35.1 kN gives a 0.661 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Pitch-diameter arithmetic: dm = (45+90)/2 = 67.5 mm; at the 4,000 r/min limiting speed the ball set runs at dn approx 2.70x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. The s1 31.1 mm dimension is printed for the locking zone — the distance before the adapter sleeve is driven up the taper — and it is verified at mounting, not recoverable from d/D/B alone. Rating split for the maintenance file: dynamic 35.1 kN (L10), static 23.2 kN (s0 shock check), fatigue 0.98 kN (adjusted life) — three separate uses for YSA 210-2FK H 2310, none interchangeable with another. Adapter-sleeve note: tighten the sleeve locknut to the catalogue axial drive-up (s1 is printed as the starting distance before the sleeve is driven into the tapered bore); under-tightening lets the inner ring creep, over-tightening eliminates internal clearance and preloads the balls hot. Mounting sequence for YSA-210-2FK-H-2310: slide H 2310 on first, seat the bearing in the housing register, then draw the nut to drive-up — reversing the order (sleeve fully tightened before housing engagement) locks in misalignment the sphered seat cannot cure.", "applications": [ "general transmission arrangements on h6 plain shafts", "fan and blower shafts of plain commercial steel", "ventilation equipment with long through-shafts" ], "failure_modes": [ "locknut not secured (no tab or thread locking): the sleeve unwinds under vibration and the unit collapses axially", "shaft shoulder absent or too small: the sleeve pulls through the bore instead of reacting the drive-up", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "relubricated with incompatible grease that hardens the factory fill and drags the seals" ], "pitfalls": [ "Plain-shaft advantage is also its trap: with no shoulders, axial location comes entirely from the sleeve/nut reaction — the abutment behind the sleeve must be square and present.", "Sleeve drive-up uses the printed s1 31.1 mm starting distance, not a torque value guessed from locknut size; re-measure the residual gap after tightening rather than trusting feel.", "The order number is incomplete without the sleeve: YSA-210-2FK-H-2310 specifies the H 2310 adapter as part of the article; quoting only the YSA bearing risks delivery of a sleeve-less tapered bore that cannot mount.", "Ordering discipline for the 45 mm size: the chapter lists several executions side by side (YSA2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSA-210-2FK-H-2310?", "a": "Boundary dimensions: bore 45 mm, sphered OD 90 mm, overall width 37 mm (55 mm with the sleeve); weight 970 g. Loads: dynamic 35.1 kN, static 23.2 kN, fatigue 0.98 kN; the only published speed is the 4,000 r/min limiting value." }, { "q": "What does the designation YSA 210-2FK H 2310 mean?", "a": "reading YSA: the inner-ring bore is tapered 1:12 and the bearing ships/specifies with its H 2310 adapter sleeve; driving the sleeve home locks the plain shaft without shoulders or screw points. read the 45 mm bore from the H 2310 sleeve designation — the YSA code marks the bearing seat size and the sleeve series is offset by one (sleeve code 310 clamps the 45 mm shaft). the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "How tight should the adapter sleeve be?", "a": "Drive-up is controlled by the printed axial procedure using the s1 starting distance (31.1 mm for this size). Too loose creeps; too tight removes internal clearance and overheats the ball set. Secure the locknut when finished." }, { "q": "What is the difference between H, HA and HE sleeves?", "a": "H sleeves fit metric shafts while HA/HE cover inch-shaft sizes of the same tapered insert; the sleeve designation, not the bearing code, determines the actual shaft diameter — always specify the bearing AND sleeve together." } ], "cross_ref": [ { "equiv_sku": "YSA", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSA-210-2FK-H-2310", "YSA 210-2FK H 2310" ], "locale_variants": {} }, { "sku": "YSA-211-2FK-H-2311", "brand": "SKF", "manufacturer_designation": "YSA 211-2FK H 2311", "series": "YSA2-series", "type": "insert", "d_mm": 50, "D_mm": 100, "B_mm": 40, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 43.6, "static_load_kN": 29, "fatigue_load_limit_kN": 1.25, "limiting_speed_rpm": 3600, "max_rpm": 3600, "weight_g": 1250, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YSA2 series order number YSA 211-2FK H 2311 is a SKF insert bearing (Y-bearing) for a 50 mm shaft: tapered-bore (1:12) insert bearing supplied on its H 2311 adapter sleeve, built to the ISO 15 diameter-series envelope with a sphered OD of 100 mm. Inside is a sealed, symmetrically extended ball insert with a tapered bore, the adapter sleeve converting a plain commercial shaft into a precision seat without shoulders, screw points or collars. reading YSA: the inner-ring bore is tapered 1:12 and the bearing ships/specifies with its H 2311 adapter sleeve; driving the sleeve home locks the plain shaft without shoulders or screw points. read the 50 mm bore from the H 2311 sleeve designation — the YSA code marks the bearing seat size and the sleeve series is offset by one (sleeve code 311 clamps the 50 mm shaft). the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 50x100x40 mm (1.969x3.937x1.575 in), outer ring 25 mm wide, C 43.6 kN, C0 29 kN, Pu 1.25 kN. Mounted width B1 59 mm includes the adapter sleeve. Supplied/specified with H 2311. The catalogue publishes a single speed ceiling, the limiting speed: 3,600 r/min; mass 1250 g. The s1 32.5 mm dimension is printed for the locking zone — the distance before the adapter sleeve is driven up the taper — and it is verified at mounting, not recoverable from d/D/B alone. Fillet discipline: the printed minimum-fillet limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 50x100 mm insert on its chamfer tilts the whole spherical seat. Fatigue-limit check: Pu 1.25 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YSA 211-2FK H 2311 — most belt-driven mounted-unit loads sit comfortably under 2.867 % of C. Spherical-seat note in numbers: the 100 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 75 = 235.619 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Mass-to-load ratio for YSA-211-2FK-H-2311: 28.67 g of catalogue mass per rated kN of C, and 25 g per millimetre of bore — useful when comparing executions of the same 50x100 mm envelope on the drawing. Adapter-sleeve note: tighten the sleeve locknut to the catalogue axial drive-up (s1 is printed as the starting distance before the sleeve is driven into the tapered bore); under-tightening lets the inner ring creep, over-tightening eliminates internal clearance and preloads the balls hot. Sleeve geometry on YSA-211-2FK-H-2311: H 2311 pulls the tapered inner ring onto the 50 mm plain shaft; the printed s1 32.5 mm is the pre-drive distance and 59 mm is the overall width including the sleeve hardware.", "applications": [ "fan and blower shafts of plain commercial steel", "ventilation equipment with long through-shafts", "general transmission arrangements on h6 plain shafts" ], "failure_modes": [ "shaft shoulder absent or too small: the sleeve pulls through the bore instead of reacting the drive-up", "sleeve over-tightened: internal clearance vanishes and the bearing runs hot from the first hours", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "The order number is incomplete without the sleeve: YSA-211-2FK-H-2311 specifies the H 2311 adapter as part of the article; quoting only the YSA bearing risks delivery of a sleeve-less tapered bore that cannot mount.", "Plain-shaft advantage is also its trap: with no shoulders, axial location comes entirely from the sleeve/nut reaction — the abutment behind the sleeve must be square and present.", "Sleeve drive-up uses the printed s1 32.5 mm starting distance, not a torque value guessed from locknut size; re-measure the residual gap after tightening rather than trusting feel.", "Catalogue ratings belong to YSA 211-2FK H 2311 as the adapter two f execution; other order numbers of the YSA 211-2FK size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSA-211-2FK-H-2311?", "a": "Boundary dimensions: bore 50 mm, sphered OD 100 mm, overall width 40 mm (59 mm with the sleeve); weight 1250 g. Loads: dynamic 43.6 kN, static 29 kN, fatigue 1.25 kN; the only published speed is the 3,600 r/min limiting value." }, { "q": "What does the designation YSA 211-2FK H 2311 mean?", "a": "reading YSA: the inner-ring bore is tapered 1:12 and the bearing ships/specifies with its H 2311 adapter sleeve; driving the sleeve home locks the plain shaft without shoulders or screw points. read the 50 mm bore from the H 2311 sleeve designation — the YSA code marks the bearing seat size and the sleeve series is offset by one (sleeve code 311 clamps the 50 mm shaft). the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "Why is the bore tapered and what is the H 2311 sleeve?", "a": "The inner ring has a 1:12 tapered bore (K); the H 2311 adapter sleeve is drawn between taper and a plain 50 mm shaft by a locknut, giving a precise, demountable concentric seat without shaft shoulders." }, { "q": "What shaft preparation is needed?", "a": "A plain commercial shaft in the recommended tolerance, clean and free of burrs, with a light abutment for the sleeve face. No shoulders, dimples or collar space are required — that is the main advantage of adapter mounting." } ], "cross_ref": [ { "equiv_sku": "YSA", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSA-211-2FK-H-2311", "YSA 211-2FK H 2311" ], "locale_variants": {} }, { "sku": "YSA-212-2FK-H-2312", "brand": "SKF", "manufacturer_designation": "YSA 212-2FK H 2312", "series": "YSA2-series", "type": "insert", "d_mm": 55, "D_mm": 110, "B_mm": 42.5, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 52.7, "static_load_kN": 36, "fatigue_load_limit_kN": 1.53, "limiting_speed_rpm": 3400, "max_rpm": 3400, "weight_g": 1550, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YSA 212-2FK H 2312 is SKF's 55 mm-bore tapered-bore (1:12) insert bearing supplied on its H 2312 adapter sleeve in the YSA2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 55x110x42.5 mm. The inner ring carries a 1:12 tapered bore and mounts on the specified adapter sleeve: tightening the sleeve nut draws the ring home on a plain shaft, while the sphered outer ring pivots in the Y-housing. YSA names the tapered-bore (K, 1:12 taper) insert mounted on an adapter sleeve: the H 2312 sleeve is drawn up the taper to clamp a plain 55 mm shaft with a locknut, giving the concentricity and easy mounting of adapter-sleeve bearings. the shaft diameter is set by the H 2312 adapter sleeve, not by the bearing code: the sleeve seats a 55 mm plain shaft under the tapered bore. suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 55x110x42.5 mm (2.165x4.331x1.673 in), outer ring 26 mm wide, C 52.7 kN, C0 36 kN, Pu 1.53 kN. Mounted width B1 62 mm includes the adapter sleeve. Supplied/specified with H 2312. The catalogue publishes a single speed ceiling, the limiting speed: 3,400 r/min; mass 1550 g. Imperial procurement cross-check: 2.165 in bore, 4.331 in OD, 1.673 in overall width; the 1550 g mass converts to 1.550 kg (54.7 oz) for the bill of materials. Width accounting: B1 62 mm covers the bearing WITH its adapter-sleeve hardware against 42.5 mm for the bearing itself and 26 mm outer-ring width; housing axial space is drawn to B1, seal replacement space to B. Fillet discipline: the printed minimum-fillet limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 55x110 mm insert on its chamfer tilts the whole spherical seat. Envelope arithmetic: the radial section from 55 mm bore to 110 mm OD is 27.5 mm; dividing C 52.7 kN by that section gives 1.916 kN per section millimetre, and the 42.5 mm overall width is 1.545x the section. Outer-vs-overall width: the outer ring is 26 mm wide inside the 42.5 mm total, so the extended inner ring accounts for 0.388 of the overall width (8.25 mm of axial projection per side). Adapter-sleeve note: tighten the sleeve locknut to the catalogue axial drive-up (s1 is printed as the starting distance before the sleeve is driven into the tapered bore); under-tightening lets the inner ring creep, over-tightening eliminates internal clearance and preloads the balls hot. Sleeve geometry on YSA-212-2FK-H-2312: H 2312 pulls the tapered inner ring onto the 55 mm plain shaft; the printed s1 33.8 mm is the pre-drive distance and 62 mm is the overall width including the sleeve hardware.", "applications": [ "fan and blower shafts of plain commercial steel", "general transmission arrangements on h6 plain shafts", "ventilation equipment with long through-shafts" ], "failure_modes": [ "shaft shoulder absent or too small: the sleeve pulls through the bore instead of reacting the drive-up", "locknut not secured (no tab or thread locking): the sleeve unwinds under vibration and the unit collapses axially", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "Sleeve drive-up uses the printed s1 33.8 mm starting distance, not a torque value guessed from locknut size; re-measure the residual gap after tightening rather than trusting feel.", "Plain-shaft advantage is also its trap: with no shoulders, axial location comes entirely from the sleeve/nut reaction — the abutment behind the sleeve must be square and present.", "The order number is incomplete without the sleeve: YSA-212-2FK-H-2312 specifies the H 2312 adapter as part of the article; quoting only the YSA bearing risks delivery of a sleeve-less tapered bore that cannot mount.", "The 52.7/36 kN figures belong specifically to YSA 212-2FK H 2312; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSA-212-2FK-H-2312?", "a": "YSA 212-2FK H 2312 measures 55 mm bore x 110 mm OD x 42.5 mm overall width (outer ring 26 mm wide), 2.165 x 4.331 x 1.673 in; mass about 1550 g. SKF 17000 ratings: C 52.7 kN, C0 36 kN, Pu 1.53 kN, limiting speed 3,400 r/min." }, { "q": "What does the designation YSA 212-2FK H 2312 mean?", "a": "YSA names the tapered-bore (K, 1:12 taper) insert mounted on an adapter sleeve: the H 2312 sleeve is drawn up the taper to clamp a plain 55 mm shaft with a locknut, giving the concentricity and easy mounting of adapter-sleeve bearings. the shaft diameter is set by the H 2312 adapter sleeve, not by the bearing code: the sleeve seats a 55 mm plain shaft under the tapered bore. suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "How tight should the adapter sleeve be?", "a": "Drive-up is controlled by the printed axial procedure using the s1 starting distance (33.8 mm for this size). Too loose creeps; too tight removes internal clearance and overheats the ball set. Secure the locknut when finished." }, { "q": "What is the difference between H, HA and HE sleeves?", "a": "H sleeves fit metric shafts while HA/HE cover inch-shaft sizes of the same tapered insert; the sleeve designation, not the bearing code, determines the actual shaft diameter — always specify the bearing AND sleeve together." } ], "cross_ref": [ { "equiv_sku": "YSA", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSA-212-2FK-H-2312", "YSA 212-2FK H 2312" ], "locale_variants": {} }, { "sku": "YSA-213-2FK-H-2313", "brand": "SKF", "manufacturer_designation": "YSA 213-2FK H 2313", "series": "YSA2-series", "type": "insert", "d_mm": 60, "D_mm": 120, "B_mm": 43.5, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 57.2, "static_load_kN": 40, "fatigue_load_limit_kN": 1.7, "limiting_speed_rpm": 3000, "max_rpm": 3000, "weight_g": 1900, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YSA2 series order number YSA 213-2FK H 2313 is a SKF insert bearing (Y-bearing) for a 60 mm shaft: tapered-bore (1:12) insert bearing supplied on its H 2313 adapter sleeve, built to the ISO 15 diameter-series envelope with a sphered OD of 120 mm. Inside is a sealed, symmetrically extended ball insert with a tapered bore, the adapter sleeve converting a plain commercial shaft into a precision seat without shoulders, screw points or collars. reading YSA: the inner-ring bore is tapered 1:12 and the bearing ships/specifies with its H 2313 adapter sleeve; driving the sleeve home locks the plain shaft without shoulders or screw points. read the 60 mm bore from the H 2313 sleeve designation — the YSA code marks the bearing seat size and the sleeve series is offset by one (sleeve code 313 clamps the 60 mm shaft). the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 60x120x43.5 mm (2.362x4.724x1.713 in), outer ring 27 mm wide, C 57.2 kN, C0 40 kN, Pu 1.7 kN. Mounted width B1 65 mm includes the adapter sleeve. Supplied/specified with H 2313. The catalogue publishes a single speed ceiling, the limiting speed: 3,000 r/min; mass 1900 g. At the printed limiting speed of 3,000 r/min the mean diameter dm = 90 mm implies dn about 2.70x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Pitch-diameter arithmetic: dm = (60+120)/2 = 90 mm; at the 3,000 r/min limiting speed the ball set runs at dn approx 2.70x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Static-first planning: the 0.92 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 60 mm shaft, not the 57.2 kN L10 value. The s1 35.3 mm dimension is printed for the locking zone — the distance before the adapter sleeve is driven up the taper — and it is verified at mounting, not recoverable from d/D/B alone. Mass-to-load ratio for YSA-213-2FK-H-2313: 33.217 g of catalogue mass per rated kN of C, and 31.667 g per millimetre of bore — useful when comparing executions of the same 60x120 mm envelope on the drawing. Adapter-sleeve note: tighten the sleeve locknut to the catalogue axial drive-up (s1 is printed as the starting distance before the sleeve is driven into the tapered bore); under-tightening lets the inner ring creep, over-tightening eliminates internal clearance and preloads the balls hot. Mounting sequence for YSA-213-2FK-H-2313: slide H 2313 on first, seat the bearing in the housing register, then draw the nut to drive-up — reversing the order (sleeve fully tightened before housing engagement) locks in misalignment the sphered seat cannot cure.", "applications": [ "mill auxiliary drives with frequent bearing changes", "heavy fan and process fan shafts", "bulk conveyor positions on plain shafting" ], "failure_modes": [ "locknut not secured (no tab or thread locking): the sleeve unwinds under vibration and the unit collapses axially", "sleeve over-tightened: internal clearance vanishes and the bearing runs hot from the first hours", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "The order number is incomplete without the sleeve: YSA-213-2FK-H-2313 specifies the H 2313 adapter as part of the article; quoting only the YSA bearing risks delivery of a sleeve-less tapered bore that cannot mount.", "Sleeve drive-up uses the printed s1 35.3 mm starting distance, not a torque value guessed from locknut size; re-measure the residual gap after tightening rather than trusting feel.", "Plain-shaft advantage is also its trap: with no shoulders, axial location comes entirely from the sleeve/nut reaction — the abutment behind the sleeve must be square and present.", "Catalogue ratings belong to YSA 213-2FK H 2313 as the adapter two f execution; other order numbers of the YSA 213-2FK size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSA-213-2FK-H-2313?", "a": "Boundary dimensions: bore 60 mm, sphered OD 120 mm, overall width 43.5 mm (65 mm with the sleeve); weight 1900 g. Loads: dynamic 57.2 kN, static 40 kN, fatigue 1.7 kN; the only published speed is the 3,000 r/min limiting value." }, { "q": "What does the designation YSA 213-2FK H 2313 mean?", "a": "reading YSA: the inner-ring bore is tapered 1:12 and the bearing ships/specifies with its H 2313 adapter sleeve; driving the sleeve home locks the plain shaft without shoulders or screw points. read the 60 mm bore from the H 2313 sleeve designation — the YSA code marks the bearing seat size and the sleeve series is offset by one (sleeve code 313 clamps the 60 mm shaft). the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "Why is the bore tapered and what is the H 2313 sleeve?", "a": "The inner ring has a 1:12 tapered bore (K); the H 2313 adapter sleeve is drawn between taper and a plain 60 mm shaft by a locknut, giving a precise, demountable concentric seat without shaft shoulders." }, { "q": "What shaft preparation is needed?", "a": "A plain commercial shaft in the recommended tolerance, clean and free of burrs, with a light abutment for the sleeve face. No shoulders, dimples or collar space are required — that is the main advantage of adapter mounting." } ], "cross_ref": [ { "equiv_sku": "YSA", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSA-213-2FK-H-2313", "YSA 213-2FK H 2313" ], "locale_variants": {} }, { "sku": "YSA-205-2FK-HE-2305", "brand": "SKF", "manufacturer_designation": "YSA 205-2FK HE 2305", "series": "YSA2-series", "type": "insert", "d_mm": 19.05, "D_mm": 52, "B_mm": 24, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 14, "static_load_kN": 7.8, "fatigue_load_limit_kN": 0.335, "limiting_speed_rpm": 7000, "max_rpm": 7000, "weight_g": 250, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YSA 205-2FK HE 2305 is SKF's 19.05 mm-bore tapered-bore (1:12) insert bearing supplied on its HE 2305 adapter sleeve in the YSA2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 19.05x52x24 mm. The inner ring carries a 1:12 tapered bore and mounts on the specified adapter sleeve: tightening the sleeve nut draws the ring home on a plain shaft, while the sphered outer ring pivots in the Y-housing. YSA names the tapered-bore (K, 1:12 taper) insert mounted on an adapter sleeve: the HE 2305 sleeve is drawn up the taper to clamp a plain 19.05 mm shaft with a locknut, giving the concentricity and easy mounting of adapter-sleeve bearings. the shaft diameter is set by the HE 2305 adapter sleeve, not by the bearing code: the sleeve seats a 19.05 mm plain shaft under the tapered bore. suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 19.05x52x24 mm (0.75x2.047x0.945 in), outer ring 15 mm wide, C 14 kN, C0 7.8 kN, Pu 0.335 kN. Mounted width B1 35 mm includes the adapter sleeve. Supplied/specified with HE 2305. The catalogue publishes a single speed ceiling, the limiting speed: 7,000 r/min; mass 250 g. Fatigue-limit check: Pu 0.335 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YSA 205-2FK HE 2305 — most belt-driven mounted-unit loads sit comfortably under 2.393 % of C. Rating split for the maintenance file: dynamic 14 kN (L10), static 7.8 kN (s0 shock check), fatigue 0.335 kN (adjusted life) — three separate uses for YSA 205-2FK HE 2305, none interchangeable with another. At the printed limiting speed of 7,000 r/min the mean diameter dm = 35.525 mm implies dn about 2.49x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Imperial procurement cross-check: 0.75 in bore, 2.047 in OD, 0.945 in overall width; the 250 g mass converts to 0.250 kg (8.8 oz) for the bill of materials. Mass-to-load ratio for YSA-205-2FK-HE-2305: 17.857 g of catalogue mass per rated kN of C, and 13.123 g per millimetre of bore — useful when comparing executions of the same 19.05x52 mm envelope on the drawing. Adapter-sleeve note: tighten the sleeve locknut to the catalogue axial drive-up (s1 is printed as the starting distance before the sleeve is driven into the tapered bore); under-tightening lets the inner ring creep, over-tightening eliminates internal clearance and preloads the balls hot. Sleeve geometry on YSA-205-2FK-HE-2305: HE 2305 pulls the tapered inner ring onto the 19.05 mm plain shaft; the printed s1 20.5 mm is the pre-drive distance and 35 mm is the overall width including the sleeve hardware.", "applications": [ "light transmission shafts without shoulders", "small fans on plain drawn shafts" ], "failure_modes": [ "locknut not secured (no tab or thread locking): the sleeve unwinds under vibration and the unit collapses axially", "sleeve under-tightened: the tapered inner ring creeps on the sleeve and polishes the taper bright", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "Sleeve drive-up uses the printed s1 20.5 mm starting distance, not a torque value guessed from locknut size; re-measure the residual gap after tightening rather than trusting feel.", "Plain-shaft advantage is also its trap: with no shoulders, axial location comes entirely from the sleeve/nut reaction — the abutment behind the sleeve must be square and present.", "The order number is incomplete without the sleeve: YSA-205-2FK-HE-2305 specifies the HE 2305 adapter as part of the article; quoting only the YSA bearing risks delivery of a sleeve-less tapered bore that cannot mount.", "The 14/7.8 kN figures belong specifically to YSA 205-2FK HE 2305; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSA-205-2FK-HE-2305?", "a": "YSA 205-2FK HE 2305 measures 19.05 mm bore x 52 mm OD x 24 mm overall width (outer ring 15 mm wide), 0.75 x 2.047 x 0.945 in; mass about 250 g. SKF 17000 ratings: C 14 kN, C0 7.8 kN, Pu 0.335 kN, limiting speed 7,000 r/min." }, { "q": "What does the designation YSA 205-2FK HE 2305 mean?", "a": "YSA names the tapered-bore (K, 1:12 taper) insert mounted on an adapter sleeve: the HE 2305 sleeve is drawn up the taper to clamp a plain 19.05 mm shaft with a locknut, giving the concentricity and easy mounting of adapter-sleeve bearings. the shaft diameter is set by the HE 2305 adapter sleeve, not by the bearing code: the sleeve seats a 19.05 mm plain shaft under the tapered bore. suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "What shaft preparation is needed?", "a": "A plain commercial shaft in the recommended tolerance, clean and free of burrs, with a light abutment for the sleeve face. No shoulders, dimples or collar space are required — that is the main advantage of adapter mounting." }, { "q": "How tight should the adapter sleeve be?", "a": "Drive-up is controlled by the printed axial procedure using the s1 starting distance (20.5 mm for this size). Too loose creeps; too tight removes internal clearance and overheats the ball set. Secure the locknut when finished." } ], "cross_ref": [ { "equiv_sku": "YSA", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSA-205-2FK-HE-2305", "YSA 205-2FK HE 2305" ], "locale_variants": {} }, { "sku": "YSA-206-2FK-HA-2306", "brand": "SKF", "manufacturer_designation": "YSA 206-2FK HA 2306", "series": "YSA2-series", "type": "insert", "d_mm": 23.812, "D_mm": 62, "B_mm": 28, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 19.5, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 6300, "max_rpm": 6300, "weight_g": 390, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YSA2 series order number YSA 206-2FK HA 2306 is a SKF insert bearing (Y-bearing) for a 23.812 mm (0.937 in) shaft: tapered-bore (1:12) insert bearing supplied on its HA 2306 adapter sleeve, built to the ISO 15 diameter-series envelope with a sphered OD of 62 mm. Inside is a sealed, symmetrically extended ball insert with a tapered bore, the adapter sleeve converting a plain commercial shaft into a precision seat without shoulders, screw points or collars. reading YSA: the inner-ring bore is tapered 1:12 and the bearing ships/specifies with its HA 2306 adapter sleeve; driving the sleeve home locks the plain shaft without shoulders or screw points. read the 23.812 mm bore from the HA 2306 sleeve designation — the YSA code marks the bearing seat size and the sleeve series is offset by one (sleeve code 2306 clamps the 23.812 mm shaft). the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 23.812x62x28 mm (0.937x2.441x1.102 in), outer ring 18 mm wide, C 19.5 kN, C0 11.2 kN, Pu 0.475 kN. Mounted width B1 38 mm includes the adapter sleeve. Supplied/specified with HA 2306. The catalogue publishes a single speed ceiling, the limiting speed: 6,300 r/min; mass 390 g. At the printed limiting speed of 6,300 r/min the mean diameter dm = 42.906 mm implies dn about 2.70x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Rating split for the maintenance file: dynamic 19.5 kN (L10), static 11.2 kN (s0 shock check), fatigue 0.475 kN (adjusted life) — three separate uses for YSA 206-2FK HA 2306, none interchangeable with another. Grease-life arithmetic is dominated by speed: at dn approx 2.70x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. The s1 22.5 mm dimension is printed for the locking zone — the distance before the adapter sleeve is driven up the taper — and it is verified at mounting, not recoverable from d/D/B alone. Fillet discipline: the printed minimum-fillet limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 23.812x62 mm insert on its chamfer tilts the whole spherical seat. Adapter-sleeve note: tighten the sleeve locknut to the catalogue axial drive-up (s1 is printed as the starting distance before the sleeve is driven into the tapered bore); under-tightening lets the inner ring creep, over-tightening eliminates internal clearance and preloads the balls hot. Sleeve geometry on YSA-206-2FK-HA-2306: HA 2306 pulls the tapered inner ring onto the 23.812 mm plain shaft; the printed s1 22.5 mm is the pre-drive distance and 38 mm is the overall width including the sleeve hardware.", "applications": [ "general transmission arrangements on h6 plain shafts", "conveyor positions needing easy removal without shaft damage", "ventilation equipment with long through-shafts" ], "failure_modes": [ "locknut not secured (no tab or thread locking): the sleeve unwinds under vibration and the unit collapses axially", "sleeve under-tightened: the tapered inner ring creeps on the sleeve and polishes the taper bright", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "The order number is incomplete without the sleeve: YSA-206-2FK-HA-2306 specifies the HA 2306 adapter as part of the article; quoting only the YSA bearing risks delivery of a sleeve-less tapered bore that cannot mount.", "Plain-shaft advantage is also its trap: with no shoulders, axial location comes entirely from the sleeve/nut reaction — the abutment behind the sleeve must be square and present.", "Sleeve drive-up uses the printed s1 22.5 mm starting distance, not a torque value guessed from locknut size; re-measure the residual gap after tightening rather than trusting feel.", "Catalogue ratings belong to YSA 206-2FK HA 2306 as the adapter two f execution; other order numbers of the YSA 206-2FK size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSA-206-2FK-HA-2306?", "a": "Boundary dimensions: bore 23.812 mm, sphered OD 62 mm, overall width 28 mm (38 mm with the sleeve); weight 390 g. Loads: dynamic 19.5 kN, static 11.2 kN, fatigue 0.475 kN; the only published speed is the 6,300 r/min limiting value." }, { "q": "What does the designation YSA 206-2FK HA 2306 mean?", "a": "reading YSA: the inner-ring bore is tapered 1:12 and the bearing ships/specifies with its HA 2306 adapter sleeve; driving the sleeve home locks the plain shaft without shoulders or screw points. read the 23.812 mm bore from the HA 2306 sleeve designation — the YSA code marks the bearing seat size and the sleeve series is offset by one (sleeve code 2306 clamps the 23.812 mm shaft). the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "What shaft preparation is needed?", "a": "A plain commercial shaft in the recommended tolerance, clean and free of burrs, with a light abutment for the sleeve face. No shoulders, dimples or collar space are required — that is the main advantage of adapter mounting." }, { "q": "How tight should the adapter sleeve be?", "a": "Drive-up is controlled by the printed axial procedure using the s1 starting distance (22.5 mm for this size). Too loose creeps; too tight removes internal clearance and overheats the ball set. Secure the locknut when finished." } ], "cross_ref": [ { "equiv_sku": "YSA", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSA-206-2FK-HA-2306", "YSA 206-2FK HA 2306" ], "locale_variants": {} }, { "sku": "YSA-206-2FK-HE-2306", "brand": "SKF", "manufacturer_designation": "YSA 206-2FK HE 2306", "series": "YSA2-series", "type": "insert", "d_mm": 25.4, "D_mm": 62, "B_mm": 28, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 19.5, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 6300, "max_rpm": 6300, "weight_g": 370, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YSA 206-2FK HE 2306 is a tapered-bore (1:12) insert bearing supplied on its HE 2306 adapter sleeve, 25.4x62x28 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction combines capped deep-groove geometry, a tapered inner-ring bore and the supplied adapter sleeve with locknut seating — factory-grade concentricity on plain drawn shafting. YSA is the adapter-sleeve member of the Y range — tapered bore plus the HE 2306 sleeve converts a plain commercial shaft into a precisely located, demountable seat at 25.4 mm. adapter mounting means the effective bore is the sleeve bore: HE 2306 gives the 25.4 mm shaft fit with no machined shoulder required. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution. Envelope 25.4x62x28 mm (1x2.441x1.102 in), outer ring 18 mm wide, C 19.5 kN, C0 11.2 kN, Pu 0.475 kN. Mounted width B1 38 mm includes the adapter sleeve. Supplied/specified with HE 2306. The catalogue publishes a single speed ceiling, the limiting speed: 6,300 r/min; mass 370 g. Fatigue-limit check: Pu 0.475 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YSA 206-2FK HE 2306 — most belt-driven mounted-unit loads sit comfortably under 2.436 % of C. Rating split for the maintenance file: dynamic 19.5 kN (L10), static 11.2 kN (s0 shock check), fatigue 0.475 kN (adjusted life) — three separate uses for YSA 206-2FK HE 2306, none interchangeable with another. Spherical-seat note in numbers: the 62 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 43.7 = 137.288 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Grease-life arithmetic is dominated by speed: at dn approx 2.75x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Bore-to-OD planning: OD 62 over bore 25.4 is a 2.441x step, while bore/overall-width gives 0.907; the spherical seat in the matching Y-housing must be specified to the 62 mm OD, not to a cylindrical housing bore. Adapter-sleeve note: tighten the sleeve locknut to the catalogue axial drive-up (s1 is printed as the starting distance before the sleeve is driven into the tapered bore); under-tightening lets the inner ring creep, over-tightening eliminates internal clearance and preloads the balls hot. Sleeve geometry on YSA-206-2FK-HE-2306: HE 2306 pulls the tapered inner ring onto the 25.4 mm plain shaft; the printed s1 22.5 mm is the pre-drive distance and 38 mm is the overall width including the sleeve hardware.", "applications": [ "general transmission arrangements on h6 plain shafts", "conveyor positions needing easy removal without shaft damage", "ventilation equipment with long through-shafts" ], "failure_modes": [ "locknut not secured (no tab or thread locking): the sleeve unwinds under vibration and the unit collapses axially", "sleeve under-tightened: the tapered inner ring creeps on the sleeve and polishes the taper bright", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "The order number is incomplete without the sleeve: YSA-206-2FK-HE-2306 specifies the HE 2306 adapter as part of the article; quoting only the YSA bearing risks delivery of a sleeve-less tapered bore that cannot mount.", "Sleeve drive-up uses the printed s1 22.5 mm starting distance, not a torque value guessed from locknut size; re-measure the residual gap after tightening rather than trusting feel.", "Plain-shaft advantage is also its trap: with no shoulders, axial location comes entirely from the sleeve/nut reaction — the abutment behind the sleeve must be square and present.", "Catalogue ratings belong to YSA 206-2FK HE 2306 as the adapter two f execution; other order numbers of the YSA 206-2FK size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSA-206-2FK-HE-2306?", "a": "The catalogue envelope is 25.4x62x28 mm with a spherical outside surface; mass 370 g. Ratings C 19.5/11.2 kN, Pu 0.475 kN, limiting speed 6,300 r/min." }, { "q": "What does the designation YSA 206-2FK HE 2306 mean?", "a": "YSA is the adapter-sleeve member of the Y range — tapered bore plus the HE 2306 sleeve converts a plain commercial shaft into a precisely located, demountable seat at 25.4 mm. adapter mounting means the effective bore is the sleeve bore: HE 2306 gives the 25.4 mm shaft fit with no machined shoulder required. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution." }, { "q": "What shaft preparation is needed?", "a": "A plain commercial shaft in the recommended tolerance, clean and free of burrs, with a light abutment for the sleeve face. No shoulders, dimples or collar space are required — that is the main advantage of adapter mounting." }, { "q": "How tight should the adapter sleeve be?", "a": "Drive-up is controlled by the printed axial procedure using the s1 starting distance (22.5 mm for this size). Too loose creeps; too tight removes internal clearance and overheats the ball set. Secure the locknut when finished." } ], "cross_ref": [ { "equiv_sku": "YSA-206-2FK-H-2306", "equiv_brand": "SKF", "level": "full", "note": "Same 25.4x62x28 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSA 206-2FK H 2306 is the tapered bore on H 2306 adapter sleeve execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 25.4 mm vs 25 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSA-206-2FK-HE-2306", "YSA 206-2FK HE 2306" ], "locale_variants": {} }, { "sku": "YSA-207-2FK-HA-2307", "brand": "SKF", "manufacturer_designation": "YSA 207-2FK HA 2307", "series": "YSA2-series", "type": "insert", "d_mm": 30.15, "D_mm": 72, "B_mm": 30.5, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 5300, "max_rpm": 5300, "weight_g": 540, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The YSA2 series order number YSA 207-2FK HA 2307 is a SKF insert bearing (Y-bearing) for a 30.15 mm (1.187 in) shaft: tapered-bore (1:12) insert bearing supplied on its HA 2307 adapter sleeve, built to the ISO 15 diameter-series envelope with a sphered OD of 72 mm. Inside is a sealed, symmetrically extended ball insert with a tapered bore, the adapter sleeve converting a plain commercial shaft into a precision seat without shoulders, screw points or collars. reading YSA: the inner-ring bore is tapered 1:12 and the bearing ships/specifies with its HA 2307 adapter sleeve; driving the sleeve home locks the plain shaft without shoulders or screw points. read the 30.15 mm bore from the HA 2307 sleeve designation — the YSA code marks the bearing seat size and the sleeve series is offset by one (sleeve code 2307 clamps the 30.15 mm shaft). the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty. Envelope 30.15x72x30.5 mm (1.187x2.835x1.201 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. Mounted width B1 43 mm includes the adapter sleeve. Supplied/specified with HA 2307. The catalogue publishes a single speed ceiling, the limiting speed: 5,300 r/min; mass 540 g. Envelope arithmetic: the radial section from 30.15 mm bore to 72 mm OD is 20.925 mm; dividing C 25.5 kN by that section gives 1.219 kN per section millimetre, and the 30.5 mm overall width is 1.458x the section. Rating split for the maintenance file: dynamic 25.5 kN (L10), static 15.3 kN (s0 shock check), fatigue 0.655 kN (adjusted life) — three separate uses for YSA 207-2FK HA 2307, none interchangeable with another. Static-first planning: the 0.502 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 30.15 mm shaft, not the 25.5 kN L10 value. Pitch-diameter arithmetic: dm = (30.15+72)/2 = 51.075 mm; at the 5,300 r/min limiting speed the ball set runs at dn approx 2.71x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Outer-vs-overall width: the outer ring is 19 mm wide inside the 30.5 mm total, so the extended inner ring accounts for 0.377 of the overall width (5.75 mm of axial projection per side). Adapter-sleeve note: tighten the sleeve locknut to the catalogue axial drive-up (s1 is printed as the starting distance before the sleeve is driven into the tapered bore); under-tightening lets the inner ring creep, over-tightening eliminates internal clearance and preloads the balls hot. Mounting sequence for YSA-207-2FK-HA-2307: slide HA 2307 on first, seat the bearing in the housing register, then draw the nut to drive-up — reversing the order (sleeve fully tightened before housing engagement) locks in misalignment the sphered seat cannot cure.", "applications": [ "ventilation equipment with long through-shafts", "conveyor positions needing easy removal without shaft damage", "fan and blower shafts of plain commercial steel" ], "failure_modes": [ "sleeve over-tightened: internal clearance vanishes and the bearing runs hot from the first hours", "sleeve under-tightened: the tapered inner ring creeps on the sleeve and polishes the taper bright", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "Sleeve drive-up uses the printed s1 24.8 mm starting distance, not a torque value guessed from locknut size; re-measure the residual gap after tightening rather than trusting feel.", "Plain-shaft advantage is also its trap: with no shoulders, axial location comes entirely from the sleeve/nut reaction — the abutment behind the sleeve must be square and present.", "The order number is incomplete without the sleeve: YSA-207-2FK-HA-2307 specifies the HA 2307 adapter as part of the article; quoting only the YSA bearing risks delivery of a sleeve-less tapered bore that cannot mount.", "The 25.5/15.3 kN figures belong specifically to YSA 207-2FK HA 2307; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSA-207-2FK-HA-2307?", "a": "Boundary dimensions: bore 30.15 mm, sphered OD 72 mm, overall width 30.5 mm (43 mm with the sleeve); weight 540 g. Loads: dynamic 25.5 kN, static 15.3 kN, fatigue 0.655 kN; the only published speed is the 5,300 r/min limiting value." }, { "q": "What does the designation YSA 207-2FK HA 2307 mean?", "a": "reading YSA: the inner-ring bore is tapered 1:12 and the bearing ships/specifies with its HA 2307 adapter sleeve; driving the sleeve home locks the plain shaft without shoulders or screw points. read the 30.15 mm bore from the HA 2307 sleeve designation — the YSA code marks the bearing seat size and the sleeve series is offset by one (sleeve code 2307 clamps the 30.15 mm shaft). the -2F external design pairs a nitrile contact seal with a plain sheet-steel thrower on both sides — a two-stage exclusion chain of flinger first, sealing lip second, typical of farm and conveyor duty." }, { "q": "What shaft preparation is needed?", "a": "A plain commercial shaft in the recommended tolerance, clean and free of burrs, with a light abutment for the sleeve face. No shoulders, dimples or collar space are required — that is the main advantage of adapter mounting." }, { "q": "How tight should the adapter sleeve be?", "a": "Drive-up is controlled by the printed axial procedure using the s1 starting distance (24.8 mm for this size). Too loose creeps; too tight removes internal clearance and overheats the ball set. Secure the locknut when finished." } ], "cross_ref": [ { "equiv_sku": "YSA-207-2FK-H-2307", "equiv_brand": "SKF", "level": "full", "note": "Same 30.15x72x30.5 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; YSA 207-2FK H 2307 is the tapered bore on H 2307 adapter sleeve execution of this size — boundary dimensions interchangeable, locking/seal execution differs. NOTE the bore differs: 30.15 mm vs 30 mm (inch-coded vs metric shaft size) — same bearing envelope, NOT interchangeable shafts." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSA-207-2FK-HA-2307", "YSA 207-2FK HA 2307" ], "locale_variants": {} }, { "sku": "YSA-208-2FK-HE-2308", "brand": "SKF", "manufacturer_designation": "YSA 208-2FK HE 2308", "series": "YSA2-series", "type": "insert", "d_mm": 31.75, "D_mm": 80, "B_mm": 33.9, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 30.7, "static_load_kN": 19, "fatigue_load_limit_kN": 0.8, "limiting_speed_rpm": 4800, "max_rpm": 4800, "weight_g": 770, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YSA 208-2FK HE 2308 is a tapered-bore (1:12) insert bearing supplied on its HE 2308 adapter sleeve, 31.75x80x33.9 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction combines capped deep-groove geometry, a tapered inner-ring bore and the supplied adapter sleeve with locknut seating — factory-grade concentricity on plain drawn shafting. YSA is the adapter-sleeve member of the Y range — tapered bore plus the HE 2308 sleeve converts a plain commercial shaft into a precisely located, demountable seat at 31.75 mm. adapter mounting means the effective bore is the sleeve bore: HE 2308 gives the 31.75 mm shaft fit with no machined shoulder required. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution. Envelope 31.75x80x33.9 mm (1.25x3.15x1.335 in), outer ring 21 mm wide, C 30.7 kN, C0 19 kN, Pu 0.8 kN. Mounted width B1 46 mm includes the adapter sleeve. Supplied/specified with HE 2308. The catalogue publishes a single speed ceiling, the limiting speed: 4,800 r/min; mass 770 g. Outer-vs-overall width: the outer ring is 21 mm wide inside the 33.9 mm total, so the extended inner ring accounts for 0.381 of the overall width (6.45 mm of axial projection per side). Rating split for the maintenance file: dynamic 30.7 kN (L10), static 19 kN (s0 shock check), fatigue 0.8 kN (adjusted life) — three separate uses for YSA 208-2FK HE 2308, none interchangeable with another. Width accounting: B1 46 mm covers the bearing WITH its adapter-sleeve hardware against 33.9 mm for the bearing itself and 21 mm outer-ring width; housing axial space is drawn to B1, seal replacement space to B. Spherical-seat note in numbers: the 80 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 55.875 = 175.536 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Fillet discipline: the printed minimum-fillet limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 31.75x80 mm insert on its chamfer tilts the whole spherical seat. Adapter-sleeve note: tighten the sleeve locknut to the catalogue axial drive-up (s1 is printed as the starting distance before the sleeve is driven into the tapered bore); under-tightening lets the inner ring creep, over-tightening eliminates internal clearance and preloads the balls hot. Sleeve geometry on YSA-208-2FK-HE-2308: HE 2308 pulls the tapered inner ring onto the 31.75 mm plain shaft; the printed s1 27.5 mm is the pre-drive distance and 46 mm is the overall width including the sleeve hardware.", "applications": [ "conveyor positions needing easy removal without shaft damage", "fan and blower shafts of plain commercial steel", "general transmission arrangements on h6 plain shafts" ], "failure_modes": [ "sleeve under-tightened: the tapered inner ring creeps on the sleeve and polishes the taper bright", "shaft shoulder absent or too small: the sleeve pulls through the bore instead of reacting the drive-up", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks" ], "pitfalls": [ "The order number is incomplete without the sleeve: YSA-208-2FK-HE-2308 specifies the HE 2308 adapter as part of the article; quoting only the YSA bearing risks delivery of a sleeve-less tapered bore that cannot mount.", "Plain-shaft advantage is also its trap: with no shoulders, axial location comes entirely from the sleeve/nut reaction — the abutment behind the sleeve must be square and present.", "Sleeve drive-up uses the printed s1 27.5 mm starting distance, not a torque value guessed from locknut size; re-measure the residual gap after tightening rather than trusting feel.", "Catalogue ratings belong to YSA 208-2FK HE 2308 as the adapter two f execution; other order numbers of the YSA 208-2FK size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSA-208-2FK-HE-2308?", "a": "The catalogue envelope is 31.75x80x33.9 mm with a spherical outside surface; mass 770 g. Ratings C 30.7/19 kN, Pu 0.8 kN, limiting speed 4,800 r/min." }, { "q": "What does the designation YSA 208-2FK HE 2308 mean?", "a": "YSA is the adapter-sleeve member of the Y range — tapered bore plus the HE 2308 sleeve converts a plain commercial shaft into a precisely located, demountable seat at 31.75 mm. adapter mounting means the effective bore is the sleeve bore: HE 2308 gives the 31.75 mm shaft fit with no machined shoulder required. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution." }, { "q": "What shaft preparation is needed?", "a": "A plain commercial shaft in the recommended tolerance, clean and free of burrs, with a light abutment for the sleeve face. No shoulders, dimples or collar space are required — that is the main advantage of adapter mounting." }, { "q": "How tight should the adapter sleeve be?", "a": "Drive-up is controlled by the printed axial procedure using the s1 starting distance (27.5 mm for this size). Too loose creeps; too tight removes internal clearance and overheats the ball set. Secure the locknut when finished." } ], "cross_ref": [ { "equiv_sku": "YSA", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSA-208-2FK-HE-2308", "YSA 208-2FK HE 2308" ], "locale_variants": {} }, { "sku": "YSA-209-2FK-HA-2309", "brand": "SKF", "manufacturer_designation": "YSA 209-2FK HA 2309", "series": "YSA2-series", "type": "insert", "d_mm": 36.512, "D_mm": 85, "B_mm": 35, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 33.2, "static_load_kN": 21.6, "fatigue_load_limit_kN": 0.915, "limiting_speed_rpm": 4300, "max_rpm": 4300, "weight_g": 920, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YSA 209-2FK HA 2309 is SKF's 36.512 mm-bore tapered-bore (1:12) insert bearing supplied on its HA 2309 adapter sleeve in the YSA2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 36.512x85x35 mm. The inner ring carries a 1:12 tapered bore and mounts on the specified adapter sleeve: tightening the sleeve nut draws the ring home on a plain shaft, while the sphered outer ring pivots in the Y-housing. YSA names the tapered-bore (K, 1:12 taper) insert mounted on an adapter sleeve: the HA 2309 sleeve is drawn up the taper to clamp a plain 36.512 mm shaft with a locknut, giving the concentricity and easy mounting of adapter-sleeve bearings. the shaft diameter is set by the HA 2309 adapter sleeve, not by the bearing code: the sleeve seats a 36.512 mm plain shaft under the tapered bore. suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 36.512x85x35 mm (1.437x3.346x1.378 in), outer ring 22 mm wide, C 33.2 kN, C0 21.6 kN, Pu 0.915 kN. Mounted width B1 50 mm includes the adapter sleeve. Supplied/specified with HA 2309. The catalogue publishes a single speed ceiling, the limiting speed: 4,300 r/min; mass 920 g. Rating split for the maintenance file: dynamic 33.2 kN (L10), static 21.6 kN (s0 shock check), fatigue 0.915 kN (adjusted life) — three separate uses for YSA 209-2FK HA 2309, none interchangeable with another. At the printed limiting speed of 4,300 r/min the mean diameter dm = 60.756 mm implies dn about 2.61x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Spherical-seat note in numbers: the 85 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 60.756 = 190.871 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Fatigue-limit check: Pu 0.915 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YSA 209-2FK HA 2309 — most belt-driven mounted-unit loads sit comfortably under 2.756 % of C. Mass-to-load ratio for YSA-209-2FK-HA-2309: 27.711 g of catalogue mass per rated kN of C, and 25.197 g per millimetre of bore — useful when comparing executions of the same 36.512x85 mm envelope on the drawing. Adapter-sleeve note: tighten the sleeve locknut to the catalogue axial drive-up (s1 is printed as the starting distance before the sleeve is driven into the tapered bore); under-tightening lets the inner ring creep, over-tightening eliminates internal clearance and preloads the balls hot. Sleeve geometry on YSA-209-2FK-HA-2309: HA 2309 pulls the tapered inner ring onto the 36.512 mm plain shaft; the printed s1 29 mm is the pre-drive distance and 50 mm is the overall width including the sleeve hardware.", "applications": [ "general transmission arrangements on h6 plain shafts", "conveyor positions needing easy removal without shaft damage", "ventilation equipment with long through-shafts" ], "failure_modes": [ "locknut not secured (no tab or thread locking): the sleeve unwinds under vibration and the unit collapses axially", "sleeve under-tightened: the tapered inner ring creeps on the sleeve and polishes the taper bright", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "The order number is incomplete without the sleeve: YSA-209-2FK-HA-2309 specifies the HA 2309 adapter as part of the article; quoting only the YSA bearing risks delivery of a sleeve-less tapered bore that cannot mount.", "Plain-shaft advantage is also its trap: with no shoulders, axial location comes entirely from the sleeve/nut reaction — the abutment behind the sleeve must be square and present.", "Sleeve drive-up uses the printed s1 29 mm starting distance, not a torque value guessed from locknut size; re-measure the residual gap after tightening rather than trusting feel.", "Catalogue ratings belong to YSA 209-2FK HA 2309 as the adapter two f execution; other order numbers of the YSA 209-2FK size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSA-209-2FK-HA-2309?", "a": "YSA 209-2FK HA 2309 measures 36.512 mm bore x 85 mm OD x 35 mm overall width (outer ring 22 mm wide), 1.437 x 3.346 x 1.378 in; mass about 920 g. SKF 17000 ratings: C 33.2 kN, C0 21.6 kN, Pu 0.915 kN, limiting speed 4,300 r/min." }, { "q": "What does the designation YSA 209-2FK HA 2309 mean?", "a": "YSA names the tapered-bore (K, 1:12 taper) insert mounted on an adapter sleeve: the HA 2309 sleeve is drawn up the taper to clamp a plain 36.512 mm shaft with a locknut, giving the concentricity and easy mounting of adapter-sleeve bearings. the shaft diameter is set by the HA 2309 adapter sleeve, not by the bearing code: the sleeve seats a 36.512 mm plain shaft under the tapered bore. suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "What shaft preparation is needed?", "a": "A plain commercial shaft in the recommended tolerance, clean and free of burrs, with a light abutment for the sleeve face. No shoulders, dimples or collar space are required — that is the main advantage of adapter mounting." }, { "q": "How tight should the adapter sleeve be?", "a": "Drive-up is controlled by the printed axial procedure using the s1 starting distance (29 mm for this size). Too loose creeps; too tight removes internal clearance and overheats the ball set. Secure the locknut when finished." } ], "cross_ref": [ { "equiv_sku": "YSA", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSA-209-2FK-HA-2309", "YSA 209-2FK HA 2309" ], "locale_variants": {} }, { "sku": "YSA-209-2FK-HE-2309", "brand": "SKF", "manufacturer_designation": "YSA 209-2FK HE 2309", "series": "YSA2-series", "type": "insert", "d_mm": 38.1, "D_mm": 85, "B_mm": 35, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 33.2, "static_load_kN": 21.6, "fatigue_load_limit_kN": 0.915, "limiting_speed_rpm": 4300, "max_rpm": 4300, "weight_g": 880, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YSA 209-2FK HE 2309 is SKF's 38.1 mm-bore tapered-bore (1:12) insert bearing supplied on its HE 2309 adapter sleeve in the YSA2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 38.1x85x35 mm. The inner ring carries a 1:12 tapered bore and mounts on the specified adapter sleeve: tightening the sleeve nut draws the ring home on a plain shaft, while the sphered outer ring pivots in the Y-housing. YSA names the tapered-bore (K, 1:12 taper) insert mounted on an adapter sleeve: the HE 2309 sleeve is drawn up the taper to clamp a plain 38.1 mm shaft with a locknut, giving the concentricity and easy mounting of adapter-sleeve bearings. the shaft diameter is set by the HE 2309 adapter sleeve, not by the bearing code: the sleeve seats a 38.1 mm plain shaft under the tapered bore. suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 38.1x85x35 mm (1.5x3.346x1.378 in), outer ring 22 mm wide, C 33.2 kN, C0 21.6 kN, Pu 0.915 kN. Mounted width B1 50 mm includes the adapter sleeve. Supplied/specified with HE 2309. The catalogue publishes a single speed ceiling, the limiting speed: 4,300 r/min; mass 880 g. Pitch-diameter arithmetic: dm = (38.1+85)/2 = 61.55 mm; at the 4,300 r/min limiting speed the ball set runs at dn approx 2.65x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. At the printed limiting speed of 4,300 r/min the mean diameter dm = 61.55 mm implies dn about 2.65x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Static-first planning: the 0.617 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 38.1 mm shaft, not the 33.2 kN L10 value. Fillet discipline: the printed minimum-fillet limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 38.1x85 mm insert on its chamfer tilts the whole spherical seat. Outer-vs-overall width: the outer ring is 22 mm wide inside the 35 mm total, so the extended inner ring accounts for 0.371 of the overall width (6.5 mm of axial projection per side). Adapter-sleeve note: tighten the sleeve locknut to the catalogue axial drive-up (s1 is printed as the starting distance before the sleeve is driven into the tapered bore); under-tightening lets the inner ring creep, over-tightening eliminates internal clearance and preloads the balls hot. Mounting sequence for YSA-209-2FK-HE-2309: slide HE 2309 on first, seat the bearing in the housing register, then draw the nut to drive-up — reversing the order (sleeve fully tightened before housing engagement) locks in misalignment the sphered seat cannot cure.", "applications": [ "ventilation equipment with long through-shafts", "conveyor positions needing easy removal without shaft damage", "fan and blower shafts of plain commercial steel" ], "failure_modes": [ "sleeve over-tightened: internal clearance vanishes and the bearing runs hot from the first hours", "sleeve under-tightened: the tapered inner ring creeps on the sleeve and polishes the taper bright", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "Sleeve drive-up uses the printed s1 29 mm starting distance, not a torque value guessed from locknut size; re-measure the residual gap after tightening rather than trusting feel.", "The order number is incomplete without the sleeve: YSA-209-2FK-HE-2309 specifies the HE 2309 adapter as part of the article; quoting only the YSA bearing risks delivery of a sleeve-less tapered bore that cannot mount.", "Plain-shaft advantage is also its trap: with no shoulders, axial location comes entirely from the sleeve/nut reaction — the abutment behind the sleeve must be square and present.", "The 33.2/21.6 kN figures belong specifically to YSA 209-2FK HE 2309; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSA-209-2FK-HE-2309?", "a": "YSA 209-2FK HE 2309 measures 38.1 mm bore x 85 mm OD x 35 mm overall width (outer ring 22 mm wide), 1.5 x 3.346 x 1.378 in; mass about 880 g. SKF 17000 ratings: C 33.2 kN, C0 21.6 kN, Pu 0.915 kN, limiting speed 4,300 r/min." }, { "q": "What does the designation YSA 209-2FK HE 2309 mean?", "a": "YSA names the tapered-bore (K, 1:12 taper) insert mounted on an adapter sleeve: the HE 2309 sleeve is drawn up the taper to clamp a plain 38.1 mm shaft with a locknut, giving the concentricity and easy mounting of adapter-sleeve bearings. the shaft diameter is set by the HE 2309 adapter sleeve, not by the bearing code: the sleeve seats a 38.1 mm plain shaft under the tapered bore. suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "What shaft preparation is needed?", "a": "A plain commercial shaft in the recommended tolerance, clean and free of burrs, with a light abutment for the sleeve face. No shoulders, dimples or collar space are required — that is the main advantage of adapter mounting." }, { "q": "How tight should the adapter sleeve be?", "a": "Drive-up is controlled by the printed axial procedure using the s1 starting distance (29 mm for this size). Too loose creeps; too tight removes internal clearance and overheats the ball set. Secure the locknut when finished." } ], "cross_ref": [ { "equiv_sku": "YSA", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSA-209-2FK-HE-2309", "YSA 209-2FK HE 2309" ], "locale_variants": {} }, { "sku": "YSA-210-2FK-HA-2310", "brand": "SKF", "manufacturer_designation": "YSA 210-2FK HA 2310", "series": "YSA2-series", "type": "insert", "d_mm": 42.862, "D_mm": 90, "B_mm": 37, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 35.1, "static_load_kN": 23.2, "fatigue_load_limit_kN": 0.98, "limiting_speed_rpm": 4000, "max_rpm": 4000, "weight_g": 1050, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YSA 210-2FK HA 2310 is a tapered-bore (1:12) insert bearing supplied on its HA 2310 adapter sleeve, 42.862x90x37 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction combines capped deep-groove geometry, a tapered inner-ring bore and the supplied adapter sleeve with locknut seating — factory-grade concentricity on plain drawn shafting. YSA is the adapter-sleeve member of the Y range — tapered bore plus the HA 2310 sleeve converts a plain commercial shaft into a precisely located, demountable seat at 42.862 mm. adapter mounting means the effective bore is the sleeve bore: HA 2310 gives the 42.862 mm shaft fit with no machined shoulder required. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution. Envelope 42.862x90x37 mm (1.687x3.543x1.457 in), outer ring 22 mm wide, C 35.1 kN, C0 23.2 kN, Pu 0.98 kN. Mounted width B1 55 mm includes the adapter sleeve. Supplied/specified with HA 2310. The catalogue publishes a single speed ceiling, the limiting speed: 4,000 r/min; mass 1050 g. Mass-to-load ratio for YSA-210-2FK-HA-2310: 29.915 g of catalogue mass per rated kN of C, and 24.497 g per millimetre of bore — useful when comparing executions of the same 42.862x90 mm envelope on the drawing. Rating split for the maintenance file: dynamic 35.1 kN (L10), static 23.2 kN (s0 shock check), fatigue 0.98 kN (adjusted life) — three separate uses for YSA 210-2FK HA 2310, none interchangeable with another. Load balance for documentation: C0 23.2 kN against C 35.1 kN gives a 0.661 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Bore-to-OD planning: OD 90 over bore 42.862 is a 2.1x step, while bore/overall-width gives 1.158; the spherical seat in the matching Y-housing must be specified to the 90 mm OD, not to a cylindrical housing bore. Width accounting: B1 55 mm covers the bearing WITH its adapter-sleeve hardware against 37 mm for the bearing itself and 22 mm outer-ring width; housing axial space is drawn to B1, seal replacement space to B. Adapter-sleeve note: tighten the sleeve locknut to the catalogue axial drive-up (s1 is printed as the starting distance before the sleeve is driven into the tapered bore); under-tightening lets the inner ring creep, over-tightening eliminates internal clearance and preloads the balls hot. Mounting sequence for YSA-210-2FK-HA-2310: slide HA 2310 on first, seat the bearing in the housing register, then draw the nut to drive-up — reversing the order (sleeve fully tightened before housing engagement) locks in misalignment the sphered seat cannot cure.", "applications": [ "ventilation equipment with long through-shafts", "conveyor positions needing easy removal without shaft damage", "fan and blower shafts of plain commercial steel" ], "failure_modes": [ "sleeve over-tightened: internal clearance vanishes and the bearing runs hot from the first hours", "sleeve under-tightened: the tapered inner ring creeps on the sleeve and polishes the taper bright", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "The order number is incomplete without the sleeve: YSA-210-2FK-HA-2310 specifies the HA 2310 adapter as part of the article; quoting only the YSA bearing risks delivery of a sleeve-less tapered bore that cannot mount.", "Sleeve drive-up uses the printed s1 31.1 mm starting distance, not a torque value guessed from locknut size; re-measure the residual gap after tightening rather than trusting feel.", "Plain-shaft advantage is also its trap: with no shoulders, axial location comes entirely from the sleeve/nut reaction — the abutment behind the sleeve must be square and present.", "Catalogue ratings belong to YSA 210-2FK HA 2310 as the adapter two f execution; other order numbers of the YSA 210-2FK size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSA-210-2FK-HA-2310?", "a": "The catalogue envelope is 42.862x90x37 mm with a spherical outside surface; mass 1050 g. Ratings C 35.1/23.2 kN, Pu 0.98 kN, limiting speed 4,000 r/min." }, { "q": "What does the designation YSA 210-2FK HA 2310 mean?", "a": "YSA is the adapter-sleeve member of the Y range — tapered bore plus the HA 2310 sleeve converts a plain commercial shaft into a precisely located, demountable seat at 42.862 mm. adapter mounting means the effective bore is the sleeve bore: HA 2310 gives the 42.862 mm shaft fit with no machined shoulder required. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution." }, { "q": "What shaft preparation is needed?", "a": "A plain commercial shaft in the recommended tolerance, clean and free of burrs, with a light abutment for the sleeve face. No shoulders, dimples or collar space are required — that is the main advantage of adapter mounting." }, { "q": "How tight should the adapter sleeve be?", "a": "Drive-up is controlled by the printed axial procedure using the s1 starting distance (31.1 mm for this size). Too loose creeps; too tight removes internal clearance and overheats the ball set. Secure the locknut when finished." } ], "cross_ref": [ { "equiv_sku": "YSA", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSA-210-2FK-HA-2310", "YSA 210-2FK HA 2310" ], "locale_variants": {} }, { "sku": "YSA-210-2FK-HE-2310", "brand": "SKF", "manufacturer_designation": "YSA 210-2FK HE 2310", "series": "YSA2-series", "type": "insert", "d_mm": 44.45, "D_mm": 90, "B_mm": 37, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 35.1, "static_load_kN": 23.2, "fatigue_load_limit_kN": 0.98, "limiting_speed_rpm": 4000, "max_rpm": 4000, "weight_g": 980, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YSA 210-2FK HE 2310 is a tapered-bore (1:12) insert bearing supplied on its HE 2310 adapter sleeve, 44.45x90x37 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction combines capped deep-groove geometry, a tapered inner-ring bore and the supplied adapter sleeve with locknut seating — factory-grade concentricity on plain drawn shafting. YSA is the adapter-sleeve member of the Y range — tapered bore plus the HE 2310 sleeve converts a plain commercial shaft into a precisely located, demountable seat at 44.45 mm. adapter mounting means the effective bore is the sleeve bore: HE 2310 gives the 44.45 mm shaft fit with no machined shoulder required. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution. Envelope 44.45x90x37 mm (1.75x3.543x1.457 in), outer ring 22 mm wide, C 35.1 kN, C0 23.2 kN, Pu 0.98 kN. Mounted width B1 55 mm includes the adapter sleeve. Supplied/specified with HE 2310. The catalogue publishes a single speed ceiling, the limiting speed: 4,000 r/min; mass 980 g. Mass-to-load ratio for YSA-210-2FK-HE-2310: 27.92 g of catalogue mass per rated kN of C, and 22.047 g per millimetre of bore — useful when comparing executions of the same 44.45x90 mm envelope on the drawing. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 62.51 mm, d3 70 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the plain flinger. Spherical-seat note in numbers: the 90 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 67.225 = 211.194 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Pitch-diameter arithmetic: dm = (44.45+90)/2 = 67.225 mm; at the 4,000 r/min limiting speed the ball set runs at dn approx 2.69x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Outer-vs-overall width: the outer ring is 22 mm wide inside the 37 mm total, so the extended inner ring accounts for 0.405 of the overall width (7.5 mm of axial projection per side). Adapter-sleeve note: tighten the sleeve locknut to the catalogue axial drive-up (s1 is printed as the starting distance before the sleeve is driven into the tapered bore); under-tightening lets the inner ring creep, over-tightening eliminates internal clearance and preloads the balls hot. Mounting sequence for YSA-210-2FK-HE-2310: slide HE 2310 on first, seat the bearing in the housing register, then draw the nut to drive-up — reversing the order (sleeve fully tightened before housing engagement) locks in misalignment the sphered seat cannot cure.", "applications": [ "ventilation equipment with long through-shafts", "conveyor positions needing easy removal without shaft damage", "fan and blower shafts of plain commercial steel" ], "failure_modes": [ "sleeve over-tightened: internal clearance vanishes and the bearing runs hot from the first hours", "sleeve under-tightened: the tapered inner ring creeps on the sleeve and polishes the taper bright", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "Sleeve drive-up uses the printed s1 31.1 mm starting distance, not a torque value guessed from locknut size; re-measure the residual gap after tightening rather than trusting feel.", "The order number is incomplete without the sleeve: YSA-210-2FK-HE-2310 specifies the HE 2310 adapter as part of the article; quoting only the YSA bearing risks delivery of a sleeve-less tapered bore that cannot mount.", "Plain-shaft advantage is also its trap: with no shoulders, axial location comes entirely from the sleeve/nut reaction — the abutment behind the sleeve must be square and present.", "The 35.1/23.2 kN figures belong specifically to YSA 210-2FK HE 2310; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSA-210-2FK-HE-2310?", "a": "The catalogue envelope is 44.45x90x37 mm with a spherical outside surface; mass 980 g. Ratings C 35.1/23.2 kN, Pu 0.98 kN, limiting speed 4,000 r/min." }, { "q": "What does the designation YSA 210-2FK HE 2310 mean?", "a": "YSA is the adapter-sleeve member of the Y range — tapered bore plus the HE 2310 sleeve converts a plain commercial shaft into a precisely located, demountable seat at 44.45 mm. adapter mounting means the effective bore is the sleeve bore: HE 2310 gives the 44.45 mm shaft fit with no machined shoulder required. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution." }, { "q": "What shaft preparation is needed?", "a": "A plain commercial shaft in the recommended tolerance, clean and free of burrs, with a light abutment for the sleeve face. No shoulders, dimples or collar space are required — that is the main advantage of adapter mounting." }, { "q": "How tight should the adapter sleeve be?", "a": "Drive-up is controlled by the printed axial procedure using the s1 starting distance (31.1 mm for this size). Too loose creeps; too tight removes internal clearance and overheats the ball set. Secure the locknut when finished." } ], "cross_ref": [ { "equiv_sku": "YSA", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSA-210-2FK-HE-2310", "YSA 210-2FK HE 2310" ], "locale_variants": {} }, { "sku": "YSA-211-2FK-HA-2311", "brand": "SKF", "manufacturer_designation": "YSA 211-2FK HA 2311", "series": "YSA2-series", "type": "insert", "d_mm": 49.212, "D_mm": 100, "B_mm": 40, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 43.6, "static_load_kN": 29, "fatigue_load_limit_kN": 1.25, "limiting_speed_rpm": 3600, "max_rpm": 3600, "weight_g": 1300, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, YSA 211-2FK HA 2311 is a tapered-bore (1:12) insert bearing supplied on its HA 2311 adapter sleeve, 49.212x100x40 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction combines capped deep-groove geometry, a tapered inner-ring bore and the supplied adapter sleeve with locknut seating — factory-grade concentricity on plain drawn shafting. YSA is the adapter-sleeve member of the Y range — tapered bore plus the HA 2311 sleeve converts a plain commercial shaft into a precisely located, demountable seat at 49.212 mm. adapter mounting means the effective bore is the sleeve bore: HA 2311 gives the 49.212 mm shaft fit with no machined shoulder required. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution. Envelope 49.212x100x40 mm (1.937x3.937x1.575 in), outer ring 25 mm wide, C 43.6 kN, C0 29 kN, Pu 1.25 kN. Mounted width B1 59 mm includes the adapter sleeve. Supplied/specified with HA 2311. The catalogue publishes a single speed ceiling, the limiting speed: 3,600 r/min; mass 1300 g. Speed ceiling of 3,600 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. At the printed limiting speed of 3,600 r/min the mean diameter dm = 74.606 mm implies dn about 2.69x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. The s1 32.5 mm dimension is printed for the locking zone — the distance before the adapter sleeve is driven up the taper — and it is verified at mounting, not recoverable from d/D/B alone. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 69.06 mm, d3 75 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the plain flinger. Envelope arithmetic: the radial section from 49.212 mm bore to 100 mm OD is 25.394 mm; dividing C 43.6 kN by that section gives 1.717 kN per section millimetre, and the 40 mm overall width is 1.575x the section. Adapter-sleeve note: tighten the sleeve locknut to the catalogue axial drive-up (s1 is printed as the starting distance before the sleeve is driven into the tapered bore); under-tightening lets the inner ring creep, over-tightening eliminates internal clearance and preloads the balls hot. Sleeve geometry on YSA-211-2FK-HA-2311: HA 2311 pulls the tapered inner ring onto the 49.212 mm plain shaft; the printed s1 32.5 mm is the pre-drive distance and 59 mm is the overall width including the sleeve hardware.", "applications": [ "conveyor positions needing easy removal without shaft damage", "fan and blower shafts of plain commercial steel", "general transmission arrangements on h6 plain shafts" ], "failure_modes": [ "sleeve under-tightened: the tapered inner ring creeps on the sleeve and polishes the taper bright", "shaft shoulder absent or too small: the sleeve pulls through the bore instead of reacting the drive-up", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "Plain-shaft advantage is also its trap: with no shoulders, axial location comes entirely from the sleeve/nut reaction — the abutment behind the sleeve must be square and present.", "The order number is incomplete without the sleeve: YSA-211-2FK-HA-2311 specifies the HA 2311 adapter as part of the article; quoting only the YSA bearing risks delivery of a sleeve-less tapered bore that cannot mount.", "Sleeve drive-up uses the printed s1 32.5 mm starting distance, not a torque value guessed from locknut size; re-measure the residual gap after tightening rather than trusting feel.", "Ordering discipline for the 49.212 mm size: the chapter lists several executions side by side (YSA2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSA-211-2FK-HA-2311?", "a": "The catalogue envelope is 49.212x100x40 mm with a spherical outside surface; mass 1300 g. Ratings C 43.6/29 kN, Pu 1.25 kN, limiting speed 3,600 r/min." }, { "q": "What does the designation YSA 211-2FK HA 2311 mean?", "a": "YSA is the adapter-sleeve member of the Y range — tapered bore plus the HA 2311 sleeve converts a plain commercial shaft into a precisely located, demountable seat at 49.212 mm. adapter mounting means the effective bore is the sleeve bore: HA 2311 gives the 49.212 mm shaft fit with no machined shoulder required. -2F decodes to contact seals with additional plain flingers, one set per side; the unit is grease-filled for life and the flinger is why the sealed width exceeds the open one-side execution." }, { "q": "What shaft preparation is needed?", "a": "A plain commercial shaft in the recommended tolerance, clean and free of burrs, with a light abutment for the sleeve face. No shoulders, dimples or collar space are required — that is the main advantage of adapter mounting." }, { "q": "How tight should the adapter sleeve be?", "a": "Drive-up is controlled by the printed axial procedure using the s1 starting distance (32.5 mm for this size). Too loose creeps; too tight removes internal clearance and overheats the ball set. Secure the locknut when finished." } ], "cross_ref": [ { "equiv_sku": "YSA", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSA-211-2FK-HA-2311", "YSA 211-2FK HA 2311" ], "locale_variants": {} }, { "sku": "YSA-211-2FK-HE-2311", "brand": "SKF", "manufacturer_designation": "YSA 211-2FK HE 2311", "series": "YSA2-series", "type": "insert", "d_mm": 50.8, "D_mm": 100, "B_mm": 40, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 43.6, "static_load_kN": 29, "fatigue_load_limit_kN": 1.25, "limiting_speed_rpm": 3600, "max_rpm": 3600, "weight_g": 1200, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YSA 211-2FK HE 2311 is SKF's 50.8 mm-bore tapered-bore (1:12) insert bearing supplied on its HE 2311 adapter sleeve in the YSA2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 50.8x100x40 mm. The inner ring carries a 1:12 tapered bore and mounts on the specified adapter sleeve: tightening the sleeve nut draws the ring home on a plain shaft, while the sphered outer ring pivots in the Y-housing. YSA names the tapered-bore (K, 1:12 taper) insert mounted on an adapter sleeve: the HE 2311 sleeve is drawn up the taper to clamp a plain 50.8 mm shaft with a locknut, giving the concentricity and easy mounting of adapter-sleeve bearings. the shaft diameter is set by the HE 2311 adapter sleeve, not by the bearing code: the sleeve seats a 50.8 mm plain shaft under the tapered bore. suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 50.8x100x40 mm (2x3.937x1.575 in), outer ring 25 mm wide, C 43.6 kN, C0 29 kN, Pu 1.25 kN. Mounted width B1 59 mm includes the adapter sleeve. Supplied/specified with HE 2311. The catalogue publishes a single speed ceiling, the limiting speed: 3,600 r/min; mass 1200 g. Selection figures for YSA 211-2FK HE 2311: C0/C is 0.665, Pu 1.25 kN is 2.867 % of the 43.6 kN dynamic rating, and the 1200 g catalogue mass works out to roughly 23.622 g per millimetre of the 50.8 mm bore. At the printed limiting speed of 3,600 r/min the mean diameter dm = 75.4 mm implies dn about 2.71x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Capacity density: 43.6 kN from 1.200 kg of bearing steel is about 36.333 kN per kilogram, and per width millimetre the 40 mm unit carries 1.09 kN of dynamic capacity. Static-first planning: the 0.725 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 50.8 mm shaft, not the 43.6 kN L10 value. Grease-life arithmetic is dominated by speed: at dn approx 2.71x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Adapter-sleeve note: tighten the sleeve locknut to the catalogue axial drive-up (s1 is printed as the starting distance before the sleeve is driven into the tapered bore); under-tightening lets the inner ring creep, over-tightening eliminates internal clearance and preloads the balls hot. Sleeve geometry on YSA-211-2FK-HE-2311: HE 2311 pulls the tapered inner ring onto the 50.8 mm plain shaft; the printed s1 32.5 mm is the pre-drive distance and 59 mm is the overall width including the sleeve hardware.", "applications": [ "conveyor positions needing easy removal without shaft damage", "fan and blower shafts of plain commercial steel", "general transmission arrangements on h6 plain shafts" ], "failure_modes": [ "sleeve under-tightened: the tapered inner ring creeps on the sleeve and polishes the taper bright", "shaft shoulder absent or too small: the sleeve pulls through the bore instead of reacting the drive-up", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "Plain-shaft advantage is also its trap: with no shoulders, axial location comes entirely from the sleeve/nut reaction — the abutment behind the sleeve must be square and present.", "The order number is incomplete without the sleeve: YSA-211-2FK-HE-2311 specifies the HE 2311 adapter as part of the article; quoting only the YSA bearing risks delivery of a sleeve-less tapered bore that cannot mount.", "Sleeve drive-up uses the printed s1 32.5 mm starting distance, not a torque value guessed from locknut size; re-measure the residual gap after tightening rather than trusting feel.", "Ordering discipline for the 50.8 mm size: the chapter lists several executions side by side (YSA2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSA-211-2FK-HE-2311?", "a": "YSA 211-2FK HE 2311 measures 50.8 mm bore x 100 mm OD x 40 mm overall width (outer ring 25 mm wide), 2 x 3.937 x 1.575 in; mass about 1200 g. SKF 17000 ratings: C 43.6 kN, C0 29 kN, Pu 1.25 kN, limiting speed 3,600 r/min." }, { "q": "What does the designation YSA 211-2FK HE 2311 mean?", "a": "YSA names the tapered-bore (K, 1:12 taper) insert mounted on an adapter sleeve: the HE 2311 sleeve is drawn up the taper to clamp a plain 50.8 mm shaft with a locknut, giving the concentricity and easy mounting of adapter-sleeve bearings. the shaft diameter is set by the HE 2311 adapter sleeve, not by the bearing code: the sleeve seats a 50.8 mm plain shaft under the tapered bore. suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "What shaft preparation is needed?", "a": "A plain commercial shaft in the recommended tolerance, clean and free of burrs, with a light abutment for the sleeve face. No shoulders, dimples or collar space are required — that is the main advantage of adapter mounting." }, { "q": "How tight should the adapter sleeve be?", "a": "Drive-up is controlled by the printed axial procedure using the s1 starting distance (32.5 mm for this size). Too loose creeps; too tight removes internal clearance and overheats the ball set. Secure the locknut when finished." } ], "cross_ref": [ { "equiv_sku": "YSA", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSA-211-2FK-HE-2311", "YSA 211-2FK HE 2311" ], "locale_variants": {} }, { "sku": "YSA-213-2FK-HA-2313", "brand": "SKF", "manufacturer_designation": "YSA 213-2FK HA 2313", "series": "YSA2-series", "type": "insert", "d_mm": 55.562, "D_mm": 120, "B_mm": 43.5, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 57.2, "static_load_kN": 40, "fatigue_load_limit_kN": 1.7, "limiting_speed_rpm": 3000, "max_rpm": 3000, "weight_g": 2100, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YSA 213-2FK HA 2313 is SKF's 55.562 mm-bore tapered-bore (1:12) insert bearing supplied on its HA 2313 adapter sleeve in the YSA2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 55.562x120x43.5 mm. The inner ring carries a 1:12 tapered bore and mounts on the specified adapter sleeve: tightening the sleeve nut draws the ring home on a plain shaft, while the sphered outer ring pivots in the Y-housing. YSA names the tapered-bore (K, 1:12 taper) insert mounted on an adapter sleeve: the HA 2313 sleeve is drawn up the taper to clamp a plain 55.562 mm shaft with a locknut, giving the concentricity and easy mounting of adapter-sleeve bearings. the shaft diameter is set by the HA 2313 adapter sleeve, not by the bearing code: the sleeve seats a 55.562 mm plain shaft under the tapered bore. suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 55.562x120x43.5 mm (2.187x4.724x1.713 in), outer ring 27 mm wide, C 57.2 kN, C0 40 kN, Pu 1.7 kN. Mounted width B1 65 mm includes the adapter sleeve. Supplied/specified with HA 2313. The catalogue publishes a single speed ceiling, the limiting speed: 3,000 r/min; mass 2100 g. Selection figures for YSA 213-2FK HA 2313: C0/C is 0.699, Pu 1.7 kN is 2.972 % of the 57.2 kN dynamic rating, and the 2100 g catalogue mass works out to roughly 37.796 g per millimetre of the 55.562 mm bore. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 82.5 mm, d3 85 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the plain flinger. Capacity density: 57.2 kN from 2.100 kg of bearing steel is about 27.238 kN per kilogram, and per width millimetre the 43.5 mm unit carries 1.315 kN of dynamic capacity. Spherical-seat note in numbers: the 120 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 87.781 = 275.772 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Rating split for the maintenance file: dynamic 57.2 kN (L10), static 40 kN (s0 shock check), fatigue 1.7 kN (adjusted life) — three separate uses for YSA 213-2FK HA 2313, none interchangeable with another. Adapter-sleeve note: tighten the sleeve locknut to the catalogue axial drive-up (s1 is printed as the starting distance before the sleeve is driven into the tapered bore); under-tightening lets the inner ring creep, over-tightening eliminates internal clearance and preloads the balls hot. Sleeve geometry on YSA-213-2FK-HA-2313: HA 2313 pulls the tapered inner ring onto the 55.562 mm plain shaft; the printed s1 35.3 mm is the pre-drive distance and 65 mm is the overall width including the sleeve hardware.", "applications": [ "bulk conveyor positions on plain shafting", "mill auxiliary drives with frequent bearing changes", "heavy fan and process fan shafts" ], "failure_modes": [ "sleeve under-tightened: the tapered inner ring creeps on the sleeve and polishes the taper bright", "shaft shoulder absent or too small: the sleeve pulls through the bore instead of reacting the drive-up", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "Plain-shaft advantage is also its trap: with no shoulders, axial location comes entirely from the sleeve/nut reaction — the abutment behind the sleeve must be square and present.", "The order number is incomplete without the sleeve: YSA-213-2FK-HA-2313 specifies the HA 2313 adapter as part of the article; quoting only the YSA bearing risks delivery of a sleeve-less tapered bore that cannot mount.", "Sleeve drive-up uses the printed s1 35.3 mm starting distance, not a torque value guessed from locknut size; re-measure the residual gap after tightening rather than trusting feel.", "Ordering discipline for the 55.562 mm size: the chapter lists several executions side by side (YSA2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSA-213-2FK-HA-2313?", "a": "YSA 213-2FK HA 2313 measures 55.562 mm bore x 120 mm OD x 43.5 mm overall width (outer ring 27 mm wide), 2.187 x 4.724 x 1.713 in; mass about 2100 g. SKF 17000 ratings: C 57.2 kN, C0 40 kN, Pu 1.7 kN, limiting speed 3,000 r/min." }, { "q": "What does the designation YSA 213-2FK HA 2313 mean?", "a": "YSA names the tapered-bore (K, 1:12 taper) insert mounted on an adapter sleeve: the HA 2313 sleeve is drawn up the taper to clamp a plain 55.562 mm shaft with a locknut, giving the concentricity and easy mounting of adapter-sleeve bearings. the shaft diameter is set by the HA 2313 adapter sleeve, not by the bearing code: the sleeve seats a 55.562 mm plain shaft under the tapered bore. suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "What shaft preparation is needed?", "a": "A plain commercial shaft in the recommended tolerance, clean and free of burrs, with a light abutment for the sleeve face. No shoulders, dimples or collar space are required — that is the main advantage of adapter mounting." }, { "q": "How tight should the adapter sleeve be?", "a": "Drive-up is controlled by the printed axial procedure using the s1 starting distance (35.3 mm for this size). Too loose creeps; too tight removes internal clearance and overheats the ball set. Secure the locknut when finished." } ], "cross_ref": [ { "equiv_sku": "YSA", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSA-213-2FK-HA-2313", "YSA 213-2FK HA 2313" ], "locale_variants": {} }, { "sku": "YSA-213-2FK-HE-2313", "brand": "SKF", "manufacturer_designation": "YSA 213-2FK HE 2313", "series": "YSA2-series", "type": "insert", "d_mm": 57.15, "D_mm": 120, "B_mm": 43.5, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 57.2, "static_load_kN": 40, "fatigue_load_limit_kN": 1.7, "limiting_speed_rpm": 3000, "max_rpm": 3000, "weight_g": 2050, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "YSA 213-2FK HE 2313 is SKF's 57.15 mm-bore tapered-bore (1:12) insert bearing supplied on its HE 2313 adapter sleeve in the YSA2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 57.15x120x43.5 mm. The inner ring carries a 1:12 tapered bore and mounts on the specified adapter sleeve: tightening the sleeve nut draws the ring home on a plain shaft, while the sphered outer ring pivots in the Y-housing. YSA names the tapered-bore (K, 1:12 taper) insert mounted on an adapter sleeve: the HE 2313 sleeve is drawn up the taper to clamp a plain 57.15 mm shaft with a locknut, giving the concentricity and easy mounting of adapter-sleeve bearings. the shaft diameter is set by the HE 2313 adapter sleeve, not by the bearing code: the sleeve seats a 57.15 mm plain shaft under the tapered bore. suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip. Envelope 57.15x120x43.5 mm (2.25x4.724x1.713 in), outer ring 27 mm wide, C 57.2 kN, C0 40 kN, Pu 1.7 kN. Mounted width B1 65 mm includes the adapter sleeve. Supplied/specified with HE 2313. The catalogue publishes a single speed ceiling, the limiting speed: 3,000 r/min; mass 2050 g. Load balance for documentation: C0 40 kN against C 57.2 kN gives a 0.699 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Rating split for the maintenance file: dynamic 57.2 kN (L10), static 40 kN (s0 shock check), fatigue 1.7 kN (adjusted life) — three separate uses for YSA 213-2FK HE 2313, none interchangeable with another. Mass-to-load ratio for YSA-213-2FK-HE-2313: 35.839 g of catalogue mass per rated kN of C, and 35.871 g per millimetre of bore — useful when comparing executions of the same 57.15x120 mm envelope on the drawing. Bore-to-OD planning: OD 120 over bore 57.15 is a 2.1x step, while bore/overall-width gives 1.314; the spherical seat in the matching Y-housing must be specified to the 120 mm OD, not to a cylindrical housing bore. Width accounting: B1 65 mm covers the bearing WITH its adapter-sleeve hardware against 43.5 mm for the bearing itself and 27 mm outer-ring width; housing axial space is drawn to B1, seal replacement space to B. Adapter-sleeve note: tighten the sleeve locknut to the catalogue axial drive-up (s1 is printed as the starting distance before the sleeve is driven into the tapered bore); under-tightening lets the inner ring creep, over-tightening eliminates internal clearance and preloads the balls hot. Mounting sequence for YSA-213-2FK-HE-2313: slide HE 2313 on first, seat the bearing in the housing register, then draw the nut to drive-up — reversing the order (sleeve fully tightened before housing engagement) locks in misalignment the sphered seat cannot cure.", "applications": [ "mill auxiliary drives with frequent bearing changes", "heavy fan and process fan shafts", "bulk conveyor positions on plain shafting" ], "failure_modes": [ "shaft shoulder absent or too small: the sleeve pulls through the bore instead of reacting the drive-up", "sleeve under-tightened: the tapered inner ring creeps on the sleeve and polishes the taper bright", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "Plain-shaft advantage is also its trap: with no shoulders, axial location comes entirely from the sleeve/nut reaction — the abutment behind the sleeve must be square and present.", "Sleeve drive-up uses the printed s1 35.3 mm starting distance, not a torque value guessed from locknut size; re-measure the residual gap after tightening rather than trusting feel.", "The order number is incomplete without the sleeve: YSA-213-2FK-HE-2313 specifies the HE 2313 adapter as part of the article; quoting only the YSA bearing risks delivery of a sleeve-less tapered bore that cannot mount.", "Ordering discipline for the 57.15 mm size: the chapter lists several executions side by side (YSA2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of YSA-213-2FK-HE-2313?", "a": "YSA 213-2FK HE 2313 measures 57.15 mm bore x 120 mm OD x 43.5 mm overall width (outer ring 27 mm wide), 2.25 x 4.724 x 1.713 in; mass about 2050 g. SKF 17000 ratings: C 57.2 kN, C0 40 kN, Pu 1.7 kN, limiting speed 3,000 r/min." }, { "q": "What does the designation YSA 213-2FK HE 2313 mean?", "a": "YSA names the tapered-bore (K, 1:12 taper) insert mounted on an adapter sleeve: the HE 2313 sleeve is drawn up the taper to clamp a plain 57.15 mm shaft with a locknut, giving the concentricity and easy mounting of adapter-sleeve bearings. the shaft diameter is set by the HE 2313 adapter sleeve, not by the bearing code: the sleeve seats a 57.15 mm plain shaft under the tapered bore. suffix -2F means an NBR rubber contact seal plus a plain pressed-steel flinger on EACH side: the lip rides the extended inner ring while the flinger sheds coarse contamination before it reaches the lip." }, { "q": "What shaft preparation is needed?", "a": "A plain commercial shaft in the recommended tolerance, clean and free of burrs, with a light abutment for the sleeve face. No shoulders, dimples or collar space are required — that is the main advantage of adapter mounting." }, { "q": "How tight should the adapter sleeve be?", "a": "Drive-up is controlled by the printed axial procedure using the s1 starting distance (35.3 mm for this size). Too loose creeps; too tight removes internal clearance and overheats the ball set. Secure the locknut when finished." } ], "cross_ref": [ { "equiv_sku": "YSA", "equiv_brand": "ISO 15", "level": "verify", "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "YSA-213-2FK-HE-2313", "YSA 213-2FK HE 2313" ], "locale_variants": {} }, { "sku": "1726203-2RS1", "brand": "SKF", "manufacturer_designation": "1726203-2RS1", "series": "17262-series", "type": "insert", "d_mm": 17, "D_mm": 40, "B_mm": 12, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 9.56, "static_load_kN": 4.75, "fatigue_load_limit_kN": 0.2, "limiting_speed_rpm": 12000, "max_rpm": 12000, "weight_g": 60, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "1726203-2RS1 is SKF's 17 mm-bore insert bearing with a standard (non-extended) inner ring in the 17262 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 17x40x12 mm. Unlike the extended-ring Y executions this is a standard-width sealed deep-groove ball insert: normal-width inner ring, spherically ground outer ring, static self-alignment only through the housing seat. the 172 prefix identifies insert bearings with a STANDARD (non-extended) inner ring; 62 after it gives the sphered-OD ISO 15 dimension series 02 and 63 the series 03, so 1726203 follows the 63-series deep-groove ball envelope with a spherically ground outside surface. the final two digits 03 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 17 mm bore. -2RS1 denotes nitrile contact seals moulded directly into the outer-ring recess on both sides; there is no separate flinger, which suits the standard-inner-ring 172-execution mounted inside a sealed Y-housing. Envelope 17x40x12 mm (0.669x1.575x0.472 in), outer ring 12 mm wide, C 9.56 kN, C0 4.75 kN, Pu 0.2 kN. The catalogue publishes a single speed ceiling, the limiting speed: 12,000 r/min; mass 60 g. Capacity density: 9.56 kN from 0.060 kg of bearing steel is about 159.333 kN per kilogram, and per width millimetre the 12 mm unit carries 0.797 kN of dynamic capacity. Bore-to-OD planning: OD 40 over bore 17 is a 2.353x step, while bore/overall-width gives 1.417; the spherical seat in the matching Y-housing must be specified to the 40 mm OD, not to a cylindrical housing bore. Fillet discipline: the printed r_min 0.6 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 17x40 mm insert on its chamfer tilts the whole spherical seat. Imperial procurement cross-check: 0.669 in bore, 1.575 in OD, 0.472 in overall width; the 60 g mass converts to 0.060 kg (2.1 oz) for the bill of materials. Pitch-diameter arithmetic: dm = (17+40)/2 = 28.5 mm; at the 12,000 r/min limiting speed the ball set runs at dn approx 3.42x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Standard-inner-ring note: unlike YAR/YEL/YSP inserts this 172 execution has NO shaft locking device and NO extended ring — it locates by fits like a normal sealed deep-groove ball bearing, while the sphered outside surface still provides static self-alignment inside the Y-housing. Fit note for 1726203-2RS1: because no locking device exists, shaft and housing fits do the locating work; treat the fit recommendations for sealed deep-groove bearings, and let the spherical OD pivot in the housing rather than forcing axial alignment.", "applications": [ "light conveyor take-ups with standard shaft fits", "small Y-housed fan positions" ], "failure_modes": [ "VP274/B lubrication holes blocked by a misaligned housing groove starve the spherical seat during re-greasing", "shaft fit wrong (no locking device exists): too loose creeps, too tight removes the residual clearance the spherical seat relies on", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "When ordering a like-for-like replacement, note whether the old part carried the B lubrication-hole execution: housing grooves aligned to B holes leave the non-B seal-only variant without its re-greasing path.", "No locking device means shaft preparation is everything for 1726203-2RS1: observe the fit, abutment and circlip recommendations rather than expecting screws or a collar to rescue a loose shaft.", "The 17x40 mm envelope matching a 63-series bearing tempts substitution into a cylindrical housing — do not: the sphered OD only works in the mating spherical Y-housing bore.", "Ordering discipline for the 17 mm size: the chapter lists several executions side by side (17262 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of 1726203-2RS1?", "a": "1726203-2RS1 measures 17 mm bore x 40 mm OD x 12 mm overall width (outer ring 12 mm wide), 0.669 x 1.575 x 0.472 in; mass about 60 g. SKF 17000 ratings: C 9.56 kN, C0 4.75 kN, Pu 0.2 kN, limiting speed 12,000 r/min." }, { "q": "What does the designation 1726203-2RS1 mean?", "a": "the 172 prefix identifies insert bearings with a STANDARD (non-extended) inner ring; 62 after it gives the sphered-OD ISO 15 dimension series 02 and 63 the series 03, so 1726203 follows the 63-series deep-groove ball envelope with a spherically ground outside surface. the final two digits 03 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 17 mm bore. -2RS1 denotes nitrile contact seals moulded directly into the outer-ring recess on both sides; there is no separate flinger, which suits the standard-inner-ring 172-execution mounted inside a sealed Y-housing." }, { "q": "What is a 172-series insert bearing?", "a": "It is an insert bearing with a STANDARD-width inner ring (172 prefix) instead of the extended YAR/YEL/YSP rings; the next digits give the sphered-OD ISO 15 dimension series — 62 for series 02 and 63 for series 03. It locks by fits, like a normal sealed deep-groove bearing, not by screws or a collar." }, { "q": "How is axial position secured with no locking device?", "a": "Through the recommended shaft and housing fits, abutments and any snap rings per the catalogue — there are no screws, collar or sleeve. The spherical OD still supplies the static self-alignment in the Y-housing." } ], "cross_ref": [ { "equiv_sku": "6203", "equiv_brand": "SKF", "level": "full", "note": "SKF SKF 6203 shares the 17x40x12 mm ISO 15 dimension-series 03 envelope and ratings within 10 %, but this SKF insert has a SPHERED outside surface for a Y-housing while 6203 has a cylindrical OD for a machined bore — envelope/load match, never a drop-in substitute." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "1726203-2RS1" ], "locale_variants": {} }, { "sku": "1726204-2RS1", "brand": "SKF", "manufacturer_designation": "1726204-2RS1", "series": "17262-series", "type": "insert", "d_mm": 20, "D_mm": 47, "B_mm": 14, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 12.7, "static_load_kN": 6.55, "fatigue_load_limit_kN": 0.28, "limiting_speed_rpm": 10000, "max_rpm": 10000, "weight_g": 100, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The 17262 series order number 1726204-2RS1 is a SKF insert bearing (Y-bearing) for a 20 mm shaft: insert bearing with a standard (non-extended) inner ring, built to the ISO 15 diameter-series envelope with a sphered OD of 47 mm. The unit is a capped deep-groove ball bearing to the ISO 15 03 envelope whose outer surface is sphered instead of cylindrical, so it combines a standard fit with Y-housing alignment. reading 1726xx: 172 = insert bearing with a standard-width inner ring, 6 = ISO 15 dimension series 03 with a spherically shaped outside surface for self-aligning in a Y-housing. the final two digits 04 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 20 mm bore. the -2RS1 suffix is the classic contact NBR seal on each side without add-on flingers — grease retention for life inside the sphered-OD ISO 15 envelope. Envelope 20x47x14 mm (0.787x1.85x0.551 in), outer ring 14 mm wide, C 12.7 kN, C0 6.55 kN, Pu 0.28 kN. The catalogue publishes a single speed ceiling, the limiting speed: 10,000 r/min; mass 100 g. Selection figures for 1726204-2RS1: C0/C is 0.516, Pu 0.28 kN is 2.205 % of the 12.7 kN dynamic rating, and the 100 g catalogue mass works out to roughly 5 g per millimetre of the 20 mm bore. Outer-vs-overall width: the outer ring is 14 mm wide inside the 14 mm total, equal to the overall width because this is the standard-inner-ring execution. Fatigue-limit check: Pu 0.28 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for 1726204-2RS1 — most belt-driven mounted-unit loads sit comfortably under 2.205 % of C. Static-first planning: the 0.468 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 20 mm shaft, not the 12.7 kN L10 value. Imperial procurement cross-check: 0.787 in bore, 1.85 in OD, 0.551 in overall width; the 100 g mass converts to 0.100 kg (3.5 oz) for the bill of materials. Standard-inner-ring note: unlike YAR/YEL/YSP inserts this 172 execution has NO shaft locking device and NO extended ring — it locates by fits like a normal sealed deep-groove ball bearing, while the sphered outside surface still provides static self-alignment inside the Y-housing. Geometry note: with the standard inner ring the 14 mm width and 20x47 mm bore/OD match the 63-series deep-groove ball envelope, while only the sphered outer surface identifies it as a Y-insert.", "applications": [ "light conveyor take-ups with standard shaft fits", "small Y-housed fan positions" ], "failure_modes": [ "shaft fit wrong (no locking device exists): too loose creeps, too tight removes the residual clearance the spherical seat relies on", "VP274/B lubrication holes blocked by a misaligned housing groove starve the spherical seat during re-greasing", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "No locking device means shaft preparation is everything for 1726204-2RS1: observe the fit, abutment and circlip recommendations rather than expecting screws or a collar to rescue a loose shaft.", "When ordering a like-for-like replacement, note whether the old part carried the B lubrication-hole execution: housing grooves aligned to B holes leave the non-B seal-only variant without its re-greasing path.", "The 20x47 mm envelope matching a 63-series bearing tempts substitution into a cylindrical housing — do not: the sphered OD only works in the mating spherical Y-housing bore.", "The 12.7/6.55 kN figures belong specifically to 1726204-2RS1; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of 1726204-2RS1?", "a": "Boundary dimensions: bore 20 mm, sphered OD 47 mm, overall width 14 mm; weight 100 g. Loads: dynamic 12.7 kN, static 6.55 kN, fatigue 0.28 kN; the only published speed is the 10,000 r/min limiting value." }, { "q": "What does the designation 1726204-2RS1 mean?", "a": "reading 1726xx: 172 = insert bearing with a standard-width inner ring, 6 = ISO 15 dimension series 03 with a spherically shaped outside surface for self-aligning in a Y-housing. the final two digits 04 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 20 mm bore. the -2RS1 suffix is the classic contact NBR seal on each side without add-on flingers — grease retention for life inside the sphered-OD ISO 15 envelope." }, { "q": "Is 1726204-2RS1 the same as a 6304 sealed deep-groove bearing?", "a": "The 20x47x14 mm envelope and ratings follow the 63-series plan, but the OUTER surface is spherically ground for a Y-housing; pressing it into a normal cylindrical bore defeats its design. Treat it as an insert, not a drop-in 63-bearing." }, { "q": "What is a 172-series insert bearing?", "a": "It is an insert bearing with a STANDARD-width inner ring (172 prefix) instead of the extended YAR/YEL/YSP rings; the next digits give the sphered-OD ISO 15 dimension series — 62 for series 02 and 63 for series 03. It locks by fits, like a normal sealed deep-groove bearing, not by screws or a collar." } ], "cross_ref": [ { "equiv_sku": "6204", "equiv_brand": "SKF", "level": "full", "note": "SKF SKF 6204 shares the 20x47x14 mm ISO 15 dimension-series 03 envelope and ratings within 10 %, but this SKF insert has a SPHERED outside surface for a Y-housing while 6204 has a cylindrical OD for a machined bore — envelope/load match, never a drop-in substitute." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "1726204-2RS1" ], "locale_variants": {} }, { "sku": "1726205-2RS1", "brand": "SKF", "manufacturer_designation": "1726205-2RS1", "series": "17262-series", "type": "insert", "d_mm": 25, "D_mm": 52, "B_mm": 15, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 14, "static_load_kN": 7.8, "fatigue_load_limit_kN": 0.335, "limiting_speed_rpm": 8500, "max_rpm": 8500, "weight_g": 120, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "1726205-2RS1 is SKF's 25 mm-bore insert bearing with a standard (non-extended) inner ring in the 17262 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 25x52x15 mm. Unlike the extended-ring Y executions this is a standard-width sealed deep-groove ball insert: normal-width inner ring, spherically ground outer ring, static self-alignment only through the housing seat. the 172 prefix identifies insert bearings with a STANDARD (non-extended) inner ring; 62 after it gives the sphered-OD ISO 15 dimension series 02 and 63 the series 03, so 1726205 follows the 63-series deep-groove ball envelope with a spherically ground outside surface. the final two digits 05 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 25 mm bore. -2RS1 denotes nitrile contact seals moulded directly into the outer-ring recess on both sides; there is no separate flinger, which suits the standard-inner-ring 172-execution mounted inside a sealed Y-housing. Envelope 25x52x15 mm (0.984x2.047x0.591 in), outer ring 15 mm wide, C 14 kN, C0 7.8 kN, Pu 0.335 kN. The catalogue publishes a single speed ceiling, the limiting speed: 8,500 r/min; mass 120 g. Rating split for the maintenance file: dynamic 14 kN (L10), static 7.8 kN (s0 shock check), fatigue 0.335 kN (adjusted life) — three separate uses for 1726205-2RS1, none interchangeable with another. Static-first planning: the 0.52 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 25 mm shaft, not the 14 kN L10 value. Pitch-diameter arithmetic: dm = (25+52)/2 = 38.5 mm; at the 8,500 r/min limiting speed the ball set runs at dn approx 3.27x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Imperial procurement cross-check: 0.984 in bore, 2.047 in OD, 0.591 in overall width; the 120 g mass converts to 0.120 kg (4.2 oz) for the bill of materials. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 34.3 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the inner flinger. Standard-inner-ring note: unlike YAR/YEL/YSP inserts this 172 execution has NO shaft locking device and NO extended ring — it locates by fits like a normal sealed deep-groove ball bearing, while the sphered outside surface still provides static self-alignment inside the Y-housing. Fit note for 1726205-2RS1: because no locking device exists, shaft and housing fits do the locating work; treat the fit recommendations for sealed deep-groove bearings, and let the spherical OD pivot in the housing rather than forcing axial alignment.", "applications": [ "general machinery using Y-flange and Y-pillow housings", "Y-housing units on standard machined shafts", "fan and conveyor positions ordered as ISO-envelope spares" ], "failure_modes": [ "treated as a normal cylindrical-OD bearing and pressed into a plain bore: the sphered outer surface cannot locate radially without the matching spherical housing seat", "shaft fit wrong (no locking device exists): too loose creeps, too tight removes the residual clearance the spherical seat relies on", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "The 25x52 mm envelope matching a 63-series bearing tempts substitution into a cylindrical housing — do not: the sphered OD only works in the mating spherical Y-housing bore.", "No locking device means shaft preparation is everything for 1726205-2RS1: observe the fit, abutment and circlip recommendations rather than expecting screws or a collar to rescue a loose shaft.", "When ordering a like-for-like replacement, note whether the old part carried the B lubrication-hole execution: housing grooves aligned to B holes leave the non-B seal-only variant without its re-greasing path.", "Catalogue ratings belong to 1726205-2RS1 as the standard std rs1 execution; other order numbers of the 1726205 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of 1726205-2RS1?", "a": "1726205-2RS1 measures 25 mm bore x 52 mm OD x 15 mm overall width (outer ring 15 mm wide), 0.984 x 2.047 x 0.591 in; mass about 120 g. SKF 17000 ratings: C 14 kN, C0 7.8 kN, Pu 0.335 kN, limiting speed 8,500 r/min." }, { "q": "What does the designation 1726205-2RS1 mean?", "a": "the 172 prefix identifies insert bearings with a STANDARD (non-extended) inner ring; 62 after it gives the sphered-OD ISO 15 dimension series 02 and 63 the series 03, so 1726205 follows the 63-series deep-groove ball envelope with a spherically ground outside surface. the final two digits 05 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 25 mm bore. -2RS1 denotes nitrile contact seals moulded directly into the outer-ring recess on both sides; there is no separate flinger, which suits the standard-inner-ring 172-execution mounted inside a sealed Y-housing." }, { "q": "What do B and VP274 mean?", "a": "B denotes lubrication holes in the outer ring (only on standard-inner-ring executions); VP274 is the NBR contact-seal package on both sides. The B-2RS1/VP274 article is therefore sealed yet re-lubricatable through the housing." }, { "q": "Is 1726205-2RS1 the same as a 6305 sealed deep-groove bearing?", "a": "The 25x52x15 mm envelope and ratings follow the 63-series plan, but the OUTER surface is spherically ground for a Y-housing; pressing it into a normal cylindrical bore defeats its design. Treat it as an insert, not a drop-in 63-bearing." } ], "cross_ref": [ { "equiv_sku": "6205", "equiv_brand": "SKF", "level": "full", "note": "SKF SKF 6205 shares the 25x52x15 mm ISO 15 dimension-series 03 envelope and ratings within 10 %, but this SKF insert has a SPHERED outside surface for a Y-housing while 6205 has a cylindrical OD for a machined bore — envelope/load match, never a drop-in substitute." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "1726205-2RS1" ], "locale_variants": {} }, { "sku": "1726305-2RS1", "brand": "SKF", "manufacturer_designation": "1726305-2RS1", "series": "17263-series", "type": "insert", "d_mm": 25, "D_mm": 62, "B_mm": 17, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 22.5, "static_load_kN": 11.6, "fatigue_load_limit_kN": 0.49, "limiting_speed_rpm": 7500, "max_rpm": 7500, "weight_g": 220, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The 17263 series order number 1726305-2RS1 is a SKF insert bearing (Y-bearing) for a 25 mm shaft: insert bearing with a standard (non-extended) inner ring, built to the ISO 15 diameter-series envelope with a sphered OD of 62 mm. The unit is a capped deep-groove ball bearing to the ISO 15 03 envelope whose outer surface is sphered instead of cylindrical, so it combines a standard fit with Y-housing alignment. reading 1726xx: 172 = insert bearing with a standard-width inner ring, 6 = ISO 15 dimension series 03 with a spherically shaped outside surface for self-aligning in a Y-housing. the final two digits 05 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 25 mm bore. the -2RS1 suffix is the classic contact NBR seal on each side without add-on flingers — grease retention for life inside the sphered-OD ISO 15 envelope. Envelope 25x62x17 mm (0.984x2.441x0.669 in), outer ring 17 mm wide, C 22.5 kN, C0 11.6 kN, Pu 0.49 kN. The catalogue publishes a single speed ceiling, the limiting speed: 7,500 r/min; mass 220 g. Envelope arithmetic: the radial section from 25 mm bore to 62 mm OD is 18.5 mm; dividing C 22.5 kN by that section gives 1.216 kN per section millimetre, and the 17 mm overall width is 0.919x the section. Outer-vs-overall width: the outer ring is 17 mm wide inside the 17 mm total, equal to the overall width because this is the standard-inner-ring execution. Bore-to-OD planning: OD 62 over bore 25 is a 2.48x step, while bore/overall-width gives 1.471; the spherical seat in the matching Y-housing must be specified to the 62 mm OD, not to a cylindrical housing bore. Mass-to-load ratio for 1726305-2RS1: 9.778 g of catalogue mass per rated kN of C, and 8.8 g per millimetre of bore — useful when comparing executions of the same 25x62 mm envelope on the drawing. Grease-life arithmetic is dominated by speed: at dn approx 3.26x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Standard-inner-ring note: unlike YAR/YEL/YSP inserts this 172 execution has NO shaft locking device and NO extended ring — it locates by fits like a normal sealed deep-groove ball bearing, while the sphered outside surface still provides static self-alignment inside the Y-housing. Fit note for 1726305-2RS1: because no locking device exists, shaft and housing fits do the locating work; treat the fit recommendations for sealed deep-groove bearings, and let the spherical OD pivot in the housing rather than forcing axial alignment.", "applications": [ "Y-housing units on standard machined shafts", "fan and conveyor positions ordered as ISO-envelope spares", "general machinery using Y-flange and Y-pillow housings" ], "failure_modes": [ "shaft fit wrong (no locking device exists): too loose creeps, too tight removes the residual clearance the spherical seat relies on", "VP274/B lubrication holes blocked by a misaligned housing groove starve the spherical seat during re-greasing", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "No locking device means shaft preparation is everything for 1726305-2RS1: observe the fit, abutment and circlip recommendations rather than expecting screws or a collar to rescue a loose shaft.", "When ordering a like-for-like replacement, note whether the old part carried the B lubrication-hole execution: housing grooves aligned to B holes leave the non-B seal-only variant without its re-greasing path.", "The 25x62 mm envelope matching a 63-series bearing tempts substitution into a cylindrical housing — do not: the sphered OD only works in the mating spherical Y-housing bore.", "The 22.5/11.6 kN figures belong specifically to 1726305-2RS1; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of 1726305-2RS1?", "a": "Boundary dimensions: bore 25 mm, sphered OD 62 mm, overall width 17 mm; weight 220 g. Loads: dynamic 22.5 kN, static 11.6 kN, fatigue 0.49 kN; the only published speed is the 7,500 r/min limiting value." }, { "q": "What does the designation 1726305-2RS1 mean?", "a": "reading 1726xx: 172 = insert bearing with a standard-width inner ring, 6 = ISO 15 dimension series 03 with a spherically shaped outside surface for self-aligning in a Y-housing. the final two digits 05 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 25 mm bore. the -2RS1 suffix is the classic contact NBR seal on each side without add-on flingers — grease retention for life inside the sphered-OD ISO 15 envelope." }, { "q": "Is 1726305-2RS1 the same as a 6305 sealed deep-groove bearing?", "a": "The 25x62x17 mm envelope and ratings follow the 63-series plan, but the OUTER surface is spherically ground for a Y-housing; pressing it into a normal cylindrical bore defeats its design. Treat it as an insert, not a drop-in 63-bearing." }, { "q": "What is a 172-series insert bearing?", "a": "It is an insert bearing with a STANDARD-width inner ring (172 prefix) instead of the extended YAR/YEL/YSP rings; the next digits give the sphered-OD ISO 15 dimension series — 62 for series 02 and 63 for series 03. It locks by fits, like a normal sealed deep-groove bearing, not by screws or a collar." } ], "cross_ref": [ { "equiv_sku": "6305", "equiv_brand": "SKF", "level": "full", "note": "SKF SKF 6305 shares the 25x62x17 mm ISO 15 dimension-series 03 envelope and ratings within 10 %, but this SKF insert has a SPHERED outside surface for a Y-housing while 6305 has a cylindrical OD for a machined bore — envelope/load match, never a drop-in substitute." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "1726305-2RS1" ], "locale_variants": {} }, { "sku": "1726206-2RS1", "brand": "SKF", "manufacturer_designation": "1726206-2RS1", "series": "17262-series", "type": "insert", "d_mm": 30, "D_mm": 62, "B_mm": 16, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 19.5, "static_load_kN": 11.2, "fatigue_load_limit_kN": 0.475, "limiting_speed_rpm": 7500, "max_rpm": 7500, "weight_g": 190, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "1726206-2RS1 is SKF's 30 mm-bore insert bearing with a standard (non-extended) inner ring in the 17262 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 30x62x16 mm. Unlike the extended-ring Y executions this is a standard-width sealed deep-groove ball insert: normal-width inner ring, spherically ground outer ring, static self-alignment only through the housing seat. the 172 prefix identifies insert bearings with a STANDARD (non-extended) inner ring; 62 after it gives the sphered-OD ISO 15 dimension series 02 and 63 the series 03, so 1726206 follows the 63-series deep-groove ball envelope with a spherically ground outside surface. the final two digits 06 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 30 mm (code 06 x 5) bore. -2RS1 denotes nitrile contact seals moulded directly into the outer-ring recess on both sides; there is no separate flinger, which suits the standard-inner-ring 172-execution mounted inside a sealed Y-housing. Envelope 30x62x16 mm (1.181x2.441x0.63 in), outer ring 16 mm wide, C 19.5 kN, C0 11.2 kN, Pu 0.475 kN. The catalogue publishes a single speed ceiling, the limiting speed: 7,500 r/min; mass 190 g. Bore-to-OD planning: OD 62 over bore 30 is a 2.067x step, while bore/overall-width gives 1.875; the spherical seat in the matching Y-housing must be specified to the 62 mm OD, not to a cylindrical housing bore. Rating split for the maintenance file: dynamic 19.5 kN (L10), static 11.2 kN (s0 shock check), fatigue 0.475 kN (adjusted life) — three separate uses for 1726206-2RS1, none interchangeable with another. Imperial procurement cross-check: 1.181 in bore, 2.441 in OD, 0.63 in overall width; the 190 g mass converts to 0.190 kg (6.7 oz) for the bill of materials. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 30x62 mm insert on its chamfer tilts the whole spherical seat. Selection figures for 1726206-2RS1: C0/C is 0.574, Pu 0.475 kN is 2.436 % of the 19.5 kN dynamic rating, and the 190 g catalogue mass works out to roughly 6.333 g per millimetre of the 30 mm bore. Standard-inner-ring note: unlike YAR/YEL/YSP inserts this 172 execution has NO shaft locking device and NO extended ring — it locates by fits like a normal sealed deep-groove ball bearing, while the sphered outside surface still provides static self-alignment inside the Y-housing. Fit note for 1726206-2RS1: because no locking device exists, shaft and housing fits do the locating work; treat the fit recommendations for sealed deep-groove bearings, and let the spherical OD pivot in the housing rather than forcing axial alignment.", "applications": [ "Y-housing units on standard machined shafts", "general machinery using Y-flange and Y-pillow housings", "fan and conveyor positions ordered as ISO-envelope spares" ], "failure_modes": [ "treated as a normal cylindrical-OD bearing and pressed into a plain bore: the sphered outer surface cannot locate radially without the matching spherical housing seat", "shaft fit wrong (no locking device exists): too loose creeps, too tight removes the residual clearance the spherical seat relies on", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "The 30x62 mm envelope matching a 63-series bearing tempts substitution into a cylindrical housing — do not: the sphered OD only works in the mating spherical Y-housing bore.", "When ordering a like-for-like replacement, note whether the old part carried the B lubrication-hole execution: housing grooves aligned to B holes leave the non-B seal-only variant without its re-greasing path.", "No locking device means shaft preparation is everything for 1726206-2RS1: observe the fit, abutment and circlip recommendations rather than expecting screws or a collar to rescue a loose shaft.", "Catalogue ratings belong to 1726206-2RS1 as the standard std rs1 execution; other order numbers of the 1726206 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of 1726206-2RS1?", "a": "1726206-2RS1 measures 30 mm bore x 62 mm OD x 16 mm overall width (outer ring 16 mm wide), 1.181 x 2.441 x 0.63 in; mass about 190 g. SKF 17000 ratings: C 19.5 kN, C0 11.2 kN, Pu 0.475 kN, limiting speed 7,500 r/min." }, { "q": "What does the designation 1726206-2RS1 mean?", "a": "the 172 prefix identifies insert bearings with a STANDARD (non-extended) inner ring; 62 after it gives the sphered-OD ISO 15 dimension series 02 and 63 the series 03, so 1726206 follows the 63-series deep-groove ball envelope with a spherically ground outside surface. the final two digits 06 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 30 mm (code 06 x 5) bore. -2RS1 denotes nitrile contact seals moulded directly into the outer-ring recess on both sides; there is no separate flinger, which suits the standard-inner-ring 172-execution mounted inside a sealed Y-housing." }, { "q": "How is axial position secured with no locking device?", "a": "Through the recommended shaft and housing fits, abutments and any snap rings per the catalogue — there are no screws, collar or sleeve. The spherical OD still supplies the static self-alignment in the Y-housing." }, { "q": "What do B and VP274 mean?", "a": "B denotes lubrication holes in the outer ring (only on standard-inner-ring executions); VP274 is the NBR contact-seal package on both sides. The B-2RS1/VP274 article is therefore sealed yet re-lubricatable through the housing." } ], "cross_ref": [ { "equiv_sku": "6206", "equiv_brand": "SKF", "level": "full", "note": "SKF SKF 6206 shares the 30x62x16 mm ISO 15 dimension-series 03 envelope and ratings within 10 %, but this SKF insert has a SPHERED outside surface for a Y-housing while 6206 has a cylindrical OD for a machined bore — envelope/load match, never a drop-in substitute." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "1726206-2RS1" ], "locale_variants": {} }, { "sku": "1726306-2RS1", "brand": "SKF", "manufacturer_designation": "1726306-2RS1", "series": "17263-series", "type": "insert", "d_mm": 30, "D_mm": 72, "B_mm": 19, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 28.1, "static_load_kN": 16, "fatigue_load_limit_kN": 0.67, "limiting_speed_rpm": 6300, "max_rpm": 6300, "weight_g": 340, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "1726306-2RS1 is SKF's 30 mm-bore insert bearing with a standard (non-extended) inner ring in the 17263 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 30x72x19 mm. Unlike the extended-ring Y executions this is a standard-width sealed deep-groove ball insert: normal-width inner ring, spherically ground outer ring, static self-alignment only through the housing seat. the 172 prefix identifies insert bearings with a STANDARD (non-extended) inner ring; 62 after it gives the sphered-OD ISO 15 dimension series 02 and 63 the series 03, so 1726306 follows the 63-series deep-groove ball envelope with a spherically ground outside surface. the final two digits 06 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 30 mm (code 06 x 5) bore. -2RS1 denotes nitrile contact seals moulded directly into the outer-ring recess on both sides; there is no separate flinger, which suits the standard-inner-ring 172-execution mounted inside a sealed Y-housing. Envelope 30x72x19 mm (1.181x2.835x0.748 in), outer ring 19 mm wide, C 28.1 kN, C0 16 kN, Pu 0.67 kN. The catalogue publishes a single speed ceiling, the limiting speed: 6,300 r/min; mass 340 g. Spherical-seat note in numbers: the 72 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 51 = 160.221 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Fillet discipline: the printed r_min 1.1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 30x72 mm insert on its chamfer tilts the whole spherical seat. Grease-life arithmetic is dominated by speed: at dn approx 3.21x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Mass-to-load ratio for 1726306-2RS1: 12.1 g of catalogue mass per rated kN of C, and 11.333 g per millimetre of bore — useful when comparing executions of the same 30x72 mm envelope on the drawing. Fatigue-limit check: Pu 0.67 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for 1726306-2RS1 — most belt-driven mounted-unit loads sit comfortably under 2.384 % of C. Standard-inner-ring note: unlike YAR/YEL/YSP inserts this 172 execution has NO shaft locking device and NO extended ring — it locates by fits like a normal sealed deep-groove ball bearing, while the sphered outside surface still provides static self-alignment inside the Y-housing. Geometry note: with the standard inner ring the 19 mm width and 30x72 mm bore/OD match the 63-series deep-groove ball envelope, while only the sphered outer surface identifies it as a Y-insert.", "applications": [ "general machinery using Y-flange and Y-pillow housings", "Y-housing units on standard machined shafts", "fan and conveyor positions ordered as ISO-envelope spares" ], "failure_modes": [ "treated as a normal cylindrical-OD bearing and pressed into a plain bore: the sphered outer surface cannot locate radially without the matching spherical housing seat", "shaft fit wrong (no locking device exists): too loose creeps, too tight removes the residual clearance the spherical seat relies on", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "The 30x72 mm envelope matching a 63-series bearing tempts substitution into a cylindrical housing — do not: the sphered OD only works in the mating spherical Y-housing bore.", "No locking device means shaft preparation is everything for 1726306-2RS1: observe the fit, abutment and circlip recommendations rather than expecting screws or a collar to rescue a loose shaft.", "When ordering a like-for-like replacement, note whether the old part carried the B lubrication-hole execution: housing grooves aligned to B holes leave the non-B seal-only variant without its re-greasing path.", "Catalogue ratings belong to 1726306-2RS1 as the standard std rs1 execution; other order numbers of the 1726306 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of 1726306-2RS1?", "a": "1726306-2RS1 measures 30 mm bore x 72 mm OD x 19 mm overall width (outer ring 19 mm wide), 1.181 x 2.835 x 0.748 in; mass about 340 g. SKF 17000 ratings: C 28.1 kN, C0 16 kN, Pu 0.67 kN, limiting speed 6,300 r/min." }, { "q": "What does the designation 1726306-2RS1 mean?", "a": "the 172 prefix identifies insert bearings with a STANDARD (non-extended) inner ring; 62 after it gives the sphered-OD ISO 15 dimension series 02 and 63 the series 03, so 1726306 follows the 63-series deep-groove ball envelope with a spherically ground outside surface. the final two digits 06 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 30 mm (code 06 x 5) bore. -2RS1 denotes nitrile contact seals moulded directly into the outer-ring recess on both sides; there is no separate flinger, which suits the standard-inner-ring 172-execution mounted inside a sealed Y-housing." }, { "q": "What is a 172-series insert bearing?", "a": "It is an insert bearing with a STANDARD-width inner ring (172 prefix) instead of the extended YAR/YEL/YSP rings; the next digits give the sphered-OD ISO 15 dimension series — 62 for series 02 and 63 for series 03. It locks by fits, like a normal sealed deep-groove bearing, not by screws or a collar." }, { "q": "How is axial position secured with no locking device?", "a": "Through the recommended shaft and housing fits, abutments and any snap rings per the catalogue — there are no screws, collar or sleeve. The spherical OD still supplies the static self-alignment in the Y-housing." } ], "cross_ref": [ { "equiv_sku": "6306", "equiv_brand": "SKF", "level": "full", "note": "SKF SKF 6306 shares the 30x72x19 mm ISO 15 dimension-series 03 envelope and ratings within 10 %, but this SKF insert has a SPHERED outside surface for a Y-housing while 6306 has a cylindrical OD for a machined bore — envelope/load match, never a drop-in substitute." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "1726306-2RS1" ], "locale_variants": {} }, { "sku": "1726207-2RS1", "brand": "SKF", "manufacturer_designation": "1726207-2RS1", "series": "17262-series", "type": "insert", "d_mm": 35, "D_mm": 72, "B_mm": 17, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 25.5, "static_load_kN": 15.3, "fatigue_load_limit_kN": 0.655, "limiting_speed_rpm": 6300, "max_rpm": 6300, "weight_g": 280, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "1726207-2RS1 is SKF's 35 mm-bore insert bearing with a standard (non-extended) inner ring in the 17262 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 35x72x17 mm. Unlike the extended-ring Y executions this is a standard-width sealed deep-groove ball insert: normal-width inner ring, spherically ground outer ring, static self-alignment only through the housing seat. the 172 prefix identifies insert bearings with a STANDARD (non-extended) inner ring; 62 after it gives the sphered-OD ISO 15 dimension series 02 and 63 the series 03, so 1726207 follows the 63-series deep-groove ball envelope with a spherically ground outside surface. the final two digits 07 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 35 mm (code 07 x 5) bore. -2RS1 denotes nitrile contact seals moulded directly into the outer-ring recess on both sides; there is no separate flinger, which suits the standard-inner-ring 172-execution mounted inside a sealed Y-housing. Envelope 35x72x17 mm (1.378x2.835x0.669 in), outer ring 17 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. The catalogue publishes a single speed ceiling, the limiting speed: 6,300 r/min; mass 280 g. Mass-to-load ratio for 1726207-2RS1: 10.98 g of catalogue mass per rated kN of C, and 8 g per millimetre of bore — useful when comparing executions of the same 35x72 mm envelope on the drawing. Width accounting on this execution: 17 mm overall and 17 mm outer-ring width leave the housing designer 0 mm of inner-ring projection to accommodate the locking arrangement. Envelope arithmetic: the radial section from 35 mm bore to 72 mm OD is 18.5 mm; dividing C 25.5 kN by that section gives 1.378 kN per section millimetre, and the 17 mm overall width is 0.919x the section. Load balance for documentation: C0 15.3 kN against C 25.5 kN gives a 0.6 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Rating split for the maintenance file: dynamic 25.5 kN (L10), static 15.3 kN (s0 shock check), fatigue 0.655 kN (adjusted life) — three separate uses for 1726207-2RS1, none interchangeable with another. Standard-inner-ring note: unlike YAR/YEL/YSP inserts this 172 execution has NO shaft locking device and NO extended ring — it locates by fits like a normal sealed deep-groove ball bearing, while the sphered outside surface still provides static self-alignment inside the Y-housing. Geometry note: with the standard inner ring the 17 mm width and 35x72 mm bore/OD match the 63-series deep-groove ball envelope, while only the sphered outer surface identifies it as a Y-insert.", "applications": [ "fan and conveyor positions ordered as ISO-envelope spares", "general machinery using Y-flange and Y-pillow housings", "Y-housing units on standard machined shafts" ], "failure_modes": [ "VP274/B lubrication holes blocked by a misaligned housing groove starve the spherical seat during re-greasing", "shaft fit wrong (no locking device exists): too loose creeps, too tight removes the residual clearance the spherical seat relies on", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "When ordering a like-for-like replacement, note whether the old part carried the B lubrication-hole execution: housing grooves aligned to B holes leave the non-B seal-only variant without its re-greasing path.", "The 35x72 mm envelope matching a 63-series bearing tempts substitution into a cylindrical housing — do not: the sphered OD only works in the mating spherical Y-housing bore.", "No locking device means shaft preparation is everything for 1726207-2RS1: observe the fit, abutment and circlip recommendations rather than expecting screws or a collar to rescue a loose shaft.", "Ordering discipline for the 35 mm size: the chapter lists several executions side by side (17262 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of 1726207-2RS1?", "a": "1726207-2RS1 measures 35 mm bore x 72 mm OD x 17 mm overall width (outer ring 17 mm wide), 1.378 x 2.835 x 0.669 in; mass about 280 g. SKF 17000 ratings: C 25.5 kN, C0 15.3 kN, Pu 0.655 kN, limiting speed 6,300 r/min." }, { "q": "What does the designation 1726207-2RS1 mean?", "a": "the 172 prefix identifies insert bearings with a STANDARD (non-extended) inner ring; 62 after it gives the sphered-OD ISO 15 dimension series 02 and 63 the series 03, so 1726207 follows the 63-series deep-groove ball envelope with a spherically ground outside surface. the final two digits 07 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 35 mm (code 07 x 5) bore. -2RS1 denotes nitrile contact seals moulded directly into the outer-ring recess on both sides; there is no separate flinger, which suits the standard-inner-ring 172-execution mounted inside a sealed Y-housing." }, { "q": "What is a 172-series insert bearing?", "a": "It is an insert bearing with a STANDARD-width inner ring (172 prefix) instead of the extended YAR/YEL/YSP rings; the next digits give the sphered-OD ISO 15 dimension series — 62 for series 02 and 63 for series 03. It locks by fits, like a normal sealed deep-groove bearing, not by screws or a collar." }, { "q": "How is axial position secured with no locking device?", "a": "Through the recommended shaft and housing fits, abutments and any snap rings per the catalogue — there are no screws, collar or sleeve. The spherical OD still supplies the static self-alignment in the Y-housing." } ], "cross_ref": [ { "equiv_sku": "6207", "equiv_brand": "SKF", "level": "full", "note": "SKF SKF 6207 shares the 35x72x17 mm ISO 15 dimension-series 03 envelope and ratings within 10 %, but this SKF insert has a SPHERED outside surface for a Y-housing while 6207 has a cylindrical OD for a machined bore — envelope/load match, never a drop-in substitute." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "1726207-2RS1" ], "locale_variants": {} }, { "sku": "1726307-2RS1", "brand": "SKF", "manufacturer_designation": "1726307-2RS1", "series": "17263-series", "type": "insert", "d_mm": 35, "D_mm": 80, "B_mm": 21, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 33.2, "static_load_kN": 19, "fatigue_load_limit_kN": 0.815, "limiting_speed_rpm": 6000, "max_rpm": 6000, "weight_g": 440, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The 17263 series order number 1726307-2RS1 is a SKF insert bearing (Y-bearing) for a 35 mm shaft: insert bearing with a standard (non-extended) inner ring, built to the ISO 15 diameter-series envelope with a sphered OD of 80 mm. The unit is a capped deep-groove ball bearing to the ISO 15 03 envelope whose outer surface is sphered instead of cylindrical, so it combines a standard fit with Y-housing alignment. reading 1726xx: 172 = insert bearing with a standard-width inner ring, 6 = ISO 15 dimension series 03 with a spherically shaped outside surface for self-aligning in a Y-housing. the final two digits 07 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 35 mm (code 07 x 5) bore. the -2RS1 suffix is the classic contact NBR seal on each side without add-on flingers — grease retention for life inside the sphered-OD ISO 15 envelope. Envelope 35x80x21 mm (1.378x3.15x0.827 in), outer ring 21 mm wide, C 33.2 kN, C0 19 kN, Pu 0.815 kN. The catalogue publishes a single speed ceiling, the limiting speed: 6,000 r/min; mass 440 g. Speed ceiling of 6,000 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Fatigue-limit check: Pu 0.815 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for 1726307-2RS1 — most belt-driven mounted-unit loads sit comfortably under 2.455 % of C. Selection figures for 1726307-2RS1: C0/C is 0.572, Pu 0.815 kN is 2.455 % of the 33.2 kN dynamic rating, and the 440 g catalogue mass works out to roughly 12.571 g per millimetre of the 35 mm bore. Mounting verification on 1726307-2RS1 uses the printed catalogue procedure rather than torque guessing. At the printed limiting speed of 6,000 r/min the mean diameter dm = 57.5 mm implies dn about 3.45x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Standard-inner-ring note: unlike YAR/YEL/YSP inserts this 172 execution has NO shaft locking device and NO extended ring — it locates by fits like a normal sealed deep-groove ball bearing, while the sphered outside surface still provides static self-alignment inside the Y-housing. Geometry note: with the standard inner ring the 21 mm width and 35x80 mm bore/OD match the 63-series deep-groove ball envelope, while only the sphered outer surface identifies it as a Y-insert.", "applications": [ "fan and conveyor positions ordered as ISO-envelope spares", "Y-housing units on standard machined shafts", "general machinery using Y-flange and Y-pillow housings" ], "failure_modes": [ "VP274/B lubrication holes blocked by a misaligned housing groove starve the spherical seat during re-greasing", "treated as a normal cylindrical-OD bearing and pressed into a plain bore: the sphered outer surface cannot locate radially without the matching spherical housing seat", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "When ordering a like-for-like replacement, note whether the old part carried the B lubrication-hole execution: housing grooves aligned to B holes leave the non-B seal-only variant without its re-greasing path.", "The 35x80 mm envelope matching a 63-series bearing tempts substitution into a cylindrical housing — do not: the sphered OD only works in the mating spherical Y-housing bore.", "No locking device means shaft preparation is everything for 1726307-2RS1: observe the fit, abutment and circlip recommendations rather than expecting screws or a collar to rescue a loose shaft.", "Ordering discipline for the 35 mm size: the chapter lists several executions side by side (17263 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of 1726307-2RS1?", "a": "Boundary dimensions: bore 35 mm, sphered OD 80 mm, overall width 21 mm; weight 440 g. Loads: dynamic 33.2 kN, static 19 kN, fatigue 0.815 kN; the only published speed is the 6,000 r/min limiting value." }, { "q": "What does the designation 1726307-2RS1 mean?", "a": "reading 1726xx: 172 = insert bearing with a standard-width inner ring, 6 = ISO 15 dimension series 03 with a spherically shaped outside surface for self-aligning in a Y-housing. the final two digits 07 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 35 mm (code 07 x 5) bore. the -2RS1 suffix is the classic contact NBR seal on each side without add-on flingers — grease retention for life inside the sphered-OD ISO 15 envelope." }, { "q": "How is axial position secured with no locking device?", "a": "Through the recommended shaft and housing fits, abutments and any snap rings per the catalogue — there are no screws, collar or sleeve. The spherical OD still supplies the static self-alignment in the Y-housing." }, { "q": "What do B and VP274 mean?", "a": "B denotes lubrication holes in the outer ring (only on standard-inner-ring executions); VP274 is the NBR contact-seal package on both sides. The B-2RS1/VP274 article is therefore sealed yet re-lubricatable through the housing." } ], "cross_ref": [ { "equiv_sku": "6307", "equiv_brand": "SKF", "level": "full", "note": "SKF SKF 6307 shares the 35x80x21 mm ISO 15 dimension-series 03 envelope and ratings within 10 %, but this SKF insert has a SPHERED outside surface for a Y-housing while 6307 has a cylindrical OD for a machined bore — envelope/load match, never a drop-in substitute." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "1726307-2RS1" ], "locale_variants": {} }, { "sku": "1726208-2RS1", "brand": "SKF", "manufacturer_designation": "1726208-2RS1", "series": "17262-series", "type": "insert", "d_mm": 40, "D_mm": 80, "B_mm": 18, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 30.7, "static_load_kN": 19, "fatigue_load_limit_kN": 0.8, "limiting_speed_rpm": 5600, "max_rpm": 5600, "weight_g": 350, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, 1726208-2RS1 is a insert bearing with a standard (non-extended) inner ring, 40x80x18 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction is the 172-family compromise: 63-series ball geometry and standard inner ring width, contact-sealed both sides, with the convex spherical OD that makes it an insert. 1726208 belongs to the 172 family: deep-groove ball geometry to the ISO 15 03 envelope, but the outer ring OD is sphered rather than cylindrical so it pivots inside the matching housing bore. the final two digits 08 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 40 mm (code 08 x 5) bore. -2RS1 contact seals both sides shield the standard-width inner ring; exclusion comes from the lip itself plus whatever the housing provides. Envelope 40x80x18 mm (1.575x3.15x0.709 in), outer ring 18 mm wide, C 30.7 kN, C0 19 kN, Pu 0.8 kN. The catalogue publishes a single speed ceiling, the limiting speed: 5,600 r/min; mass 350 g. Static-first planning: the 1.056 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 40 mm shaft, not the 30.7 kN L10 value. Width accounting on this execution: 18 mm overall and 18 mm outer-ring width leave the housing designer 0 mm of inner-ring projection to accommodate the locking arrangement. Spherical-seat note in numbers: the 80 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 60 = 188.496 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Fillet discipline: the printed r_min 1.1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 40x80 mm insert on its chamfer tilts the whole spherical seat. Grease-life arithmetic is dominated by speed: at dn approx 3.36x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Standard-inner-ring note: unlike YAR/YEL/YSP inserts this 172 execution has NO shaft locking device and NO extended ring — it locates by fits like a normal sealed deep-groove ball bearing, while the sphered outside surface still provides static self-alignment inside the Y-housing. Fit note for 1726208-2RS1: because no locking device exists, shaft and housing fits do the locating work; treat the fit recommendations for sealed deep-groove bearings, and let the spherical OD pivot in the housing rather than forcing axial alignment.", "applications": [ "Y-housing units on standard machined shafts", "fan and conveyor positions ordered as ISO-envelope spares", "general machinery using Y-flange and Y-pillow housings" ], "failure_modes": [ "VP274/B lubrication holes blocked by a misaligned housing groove starve the spherical seat during re-greasing", "treated as a normal cylindrical-OD bearing and pressed into a plain bore: the sphered outer surface cannot locate radially without the matching spherical housing seat", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "When ordering a like-for-like replacement, note whether the old part carried the B lubrication-hole execution: housing grooves aligned to B holes leave the non-B seal-only variant without its re-greasing path.", "The 40x80 mm envelope matching a 63-series bearing tempts substitution into a cylindrical housing — do not: the sphered OD only works in the mating spherical Y-housing bore.", "No locking device means shaft preparation is everything for 1726208-2RS1: observe the fit, abutment and circlip recommendations rather than expecting screws or a collar to rescue a loose shaft.", "Ordering discipline for the 40 mm size: the chapter lists several executions side by side (17262 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of 1726208-2RS1?", "a": "The catalogue envelope is 40x80x18 mm with a spherical outside surface; mass 350 g. Ratings C 30.7/19 kN, Pu 0.8 kN, limiting speed 5,600 r/min." }, { "q": "What does the designation 1726208-2RS1 mean?", "a": "1726208 belongs to the 172 family: deep-groove ball geometry to the ISO 15 03 envelope, but the outer ring OD is sphered rather than cylindrical so it pivots inside the matching housing bore. the final two digits 08 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 40 mm (code 08 x 5) bore. -2RS1 contact seals both sides shield the standard-width inner ring; exclusion comes from the lip itself plus whatever the housing provides." }, { "q": "Is 1726208-2RS1 the same as a 6308 sealed deep-groove bearing?", "a": "The 40x80x18 mm envelope and ratings follow the 63-series plan, but the OUTER surface is spherically ground for a Y-housing; pressing it into a normal cylindrical bore defeats its design. Treat it as an insert, not a drop-in 63-bearing." }, { "q": "What is a 172-series insert bearing?", "a": "It is an insert bearing with a STANDARD-width inner ring (172 prefix) instead of the extended YAR/YEL/YSP rings; the next digits give the sphered-OD ISO 15 dimension series — 62 for series 02 and 63 for series 03. It locks by fits, like a normal sealed deep-groove bearing, not by screws or a collar." } ], "cross_ref": [ { "equiv_sku": "6208", "equiv_brand": "SKF", "level": "full", "note": "SKF SKF 6208 shares the 40x80x18 mm ISO 15 dimension-series 03 envelope and ratings within 10 %, but this SKF insert has a SPHERED outside surface for a Y-housing while 6208 has a cylindrical OD for a machined bore — envelope/load match, never a drop-in substitute." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "1726208-2RS1" ], "locale_variants": {} }, { "sku": "1726308-2RS1", "brand": "SKF", "manufacturer_designation": "1726308-2RS1", "series": "17263-series", "type": "insert", "d_mm": 40, "D_mm": 90, "B_mm": 23, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 41, "static_load_kN": 24, "fatigue_load_limit_kN": 1, "limiting_speed_rpm": 5000, "max_rpm": 5000, "weight_g": 610, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "1726308-2RS1 is SKF's 40 mm-bore insert bearing with a standard (non-extended) inner ring in the 17263 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 40x90x23 mm. Unlike the extended-ring Y executions this is a standard-width sealed deep-groove ball insert: normal-width inner ring, spherically ground outer ring, static self-alignment only through the housing seat. the 172 prefix identifies insert bearings with a STANDARD (non-extended) inner ring; 62 after it gives the sphered-OD ISO 15 dimension series 02 and 63 the series 03, so 1726308 follows the 63-series deep-groove ball envelope with a spherically ground outside surface. the final two digits 08 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 40 mm (code 08 x 5) bore. -2RS1 denotes nitrile contact seals moulded directly into the outer-ring recess on both sides; there is no separate flinger, which suits the standard-inner-ring 172-execution mounted inside a sealed Y-housing. Envelope 40x90x23 mm (1.575x3.543x0.906 in), outer ring 23 mm wide, C 41 kN, C0 24 kN, Pu 1 kN. The catalogue publishes a single speed ceiling, the limiting speed: 5,000 r/min; mass 610 g. Bore-to-OD planning: OD 90 over bore 40 is a 2.25x step, while bore/overall-width gives 1.739; the spherical seat in the matching Y-housing must be specified to the 90 mm OD, not to a cylindrical housing bore. Mounting verification on 1726308-2RS1 uses the printed catalogue procedure rather than torque guessing. Grease-life arithmetic is dominated by speed: at dn approx 3.25x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Mass-to-load ratio for 1726308-2RS1: 14.878 g of catalogue mass per rated kN of C, and 15.25 g per millimetre of bore — useful when comparing executions of the same 40x90 mm envelope on the drawing. Selection figures for 1726308-2RS1: C0/C is 0.585, Pu 1 kN is 2.439 % of the 41 kN dynamic rating, and the 610 g catalogue mass works out to roughly 15.25 g per millimetre of the 40 mm bore. Standard-inner-ring note: unlike YAR/YEL/YSP inserts this 172 execution has NO shaft locking device and NO extended ring — it locates by fits like a normal sealed deep-groove ball bearing, while the sphered outside surface still provides static self-alignment inside the Y-housing. Geometry note: with the standard inner ring the 23 mm width and 40x90 mm bore/OD match the 63-series deep-groove ball envelope, while only the sphered outer surface identifies it as a Y-insert.", "applications": [ "fan and conveyor positions ordered as ISO-envelope spares", "general machinery using Y-flange and Y-pillow housings", "Y-housing units on standard machined shafts" ], "failure_modes": [ "VP274/B lubrication holes blocked by a misaligned housing groove starve the spherical seat during re-greasing", "shaft fit wrong (no locking device exists): too loose creeps, too tight removes the residual clearance the spherical seat relies on", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "When ordering a like-for-like replacement, note whether the old part carried the B lubrication-hole execution: housing grooves aligned to B holes leave the non-B seal-only variant without its re-greasing path.", "The 40x90 mm envelope matching a 63-series bearing tempts substitution into a cylindrical housing — do not: the sphered OD only works in the mating spherical Y-housing bore.", "No locking device means shaft preparation is everything for 1726308-2RS1: observe the fit, abutment and circlip recommendations rather than expecting screws or a collar to rescue a loose shaft.", "Ordering discipline for the 40 mm size: the chapter lists several executions side by side (17263 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of 1726308-2RS1?", "a": "1726308-2RS1 measures 40 mm bore x 90 mm OD x 23 mm overall width (outer ring 23 mm wide), 1.575 x 3.543 x 0.906 in; mass about 610 g. SKF 17000 ratings: C 41 kN, C0 24 kN, Pu 1 kN, limiting speed 5,000 r/min." }, { "q": "What does the designation 1726308-2RS1 mean?", "a": "the 172 prefix identifies insert bearings with a STANDARD (non-extended) inner ring; 62 after it gives the sphered-OD ISO 15 dimension series 02 and 63 the series 03, so 1726308 follows the 63-series deep-groove ball envelope with a spherically ground outside surface. the final two digits 08 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 40 mm (code 08 x 5) bore. -2RS1 denotes nitrile contact seals moulded directly into the outer-ring recess on both sides; there is no separate flinger, which suits the standard-inner-ring 172-execution mounted inside a sealed Y-housing." }, { "q": "What do B and VP274 mean?", "a": "B denotes lubrication holes in the outer ring (only on standard-inner-ring executions); VP274 is the NBR contact-seal package on both sides. The B-2RS1/VP274 article is therefore sealed yet re-lubricatable through the housing." }, { "q": "Is 1726308-2RS1 the same as a 6308 sealed deep-groove bearing?", "a": "The 40x90x23 mm envelope and ratings follow the 63-series plan, but the OUTER surface is spherically ground for a Y-housing; pressing it into a normal cylindrical bore defeats its design. Treat it as an insert, not a drop-in 63-bearing." } ], "cross_ref": [ { "equiv_sku": "6308", "equiv_brand": "SKF", "level": "full", "note": "SKF SKF 6308 shares the 40x90x23 mm ISO 15 dimension-series 03 envelope and ratings within 10 %, but this SKF insert has a SPHERED outside surface for a Y-housing while 6308 has a cylindrical OD for a machined bore — envelope/load match, never a drop-in substitute." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "1726308-2RS1" ], "locale_variants": {} }, { "sku": "1726209-B-2RS1-VP274", "brand": "SKF", "manufacturer_designation": "1726209B-2RS1/VP274", "series": "17262-series", "type": "insert", "d_mm": 45, "D_mm": 85, "B_mm": 19, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 33.2, "static_load_kN": 21.6, "fatigue_load_limit_kN": 0.915, "limiting_speed_rpm": 4300, "max_rpm": 4300, "weight_g": 390, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Listed in SKF 17000 chapter 2, 1726209B-2RS1/VP274 is a insert bearing with a standard (non-extended) inner ring, 45x85x19 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction is the 172-family compromise: 63-series ball geometry and standard inner ring width, contact-sealed both sides, with the convex spherical OD that makes it an insert. 1726209 belongs to the 172 family: deep-groove ball geometry to the ISO 15 03 envelope, but the outer ring OD is sphered rather than cylindrical so it pivots inside the matching housing bore. the final two digits 09 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 45 mm (code 09 x 5) bore. VP274 supplies two-side NBR contact sealing for the B (lubrication-hole) execution; the holes let fresh grease reach the sphered-OD seat during servicing. Envelope 45x85x19 mm (1.772x3.346x0.748 in), outer ring 19 mm wide, C 33.2 kN, C0 21.6 kN, Pu 0.915 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,300 r/min; mass 390 g. Rating split for the maintenance file: dynamic 33.2 kN (L10), static 21.6 kN (s0 shock check), fatigue 0.915 kN (adjusted life) — three separate uses for 1726209B-2RS1/VP274, none interchangeable with another. Spherical-seat note in numbers: the 85 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 65 = 204.204 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Pitch-diameter arithmetic: dm = (45+85)/2 = 65 mm; at the 4,300 r/min limiting speed the ball set runs at dn approx 2.79x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Mounting verification on 1726209-B-2RS1-VP274 uses the printed catalogue procedure rather than torque guessing. At the printed limiting speed of 4,300 r/min the mean diameter dm = 65 mm implies dn about 2.79x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Lubrication-hole note: the B execution carries outer-ring lubrication holes feeding the sphered outside surface; align the hole with the housing groove before clamping the cap, because a hole sealed off by a misaligned housing traps old grease and starves the spherical seat during re-lubrication. Fit note for 1726209-B-2RS1-VP274: because no locking device exists, shaft and housing fits do the locating work; treat the fit recommendations for sealed deep-groove bearings, and let the spherical OD pivot in the housing rather than forcing axial alignment.", "applications": [ "fan and conveyor positions ordered as ISO-envelope spares", "general machinery using Y-flange and Y-pillow housings", "Y-housing units on standard machined shafts" ], "failure_modes": [ "shaft fit wrong (no locking device exists): too loose creeps, too tight removes the residual clearance the spherical seat relies on", "treated as a normal cylindrical-OD bearing and pressed into a plain bore: the sphered outer surface cannot locate radially without the matching spherical housing seat", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "relubricated with incompatible grease that hardens the factory fill and drags the seals" ], "pitfalls": [ "No locking device means shaft preparation is everything for 1726209-B-2RS1-VP274: observe the fit, abutment and circlip recommendations rather than expecting screws or a collar to rescue a loose shaft.", "The 45x85 mm envelope matching a 63-series bearing tempts substitution into a cylindrical housing — do not: the sphered OD only works in the mating spherical Y-housing bore.", "When ordering a like-for-like replacement, note whether the old part carried the B lubrication-hole execution: housing grooves aligned to B holes leave the non-B seal-only variant without its re-greasing path.", "The 33.2/21.6 kN figures belong specifically to 1726209B-2RS1/VP274; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of 1726209-B-2RS1-VP274?", "a": "The catalogue envelope is 45x85x19 mm with a spherical outside surface; mass 390 g. Ratings C 33.2/21.6 kN, Pu 0.915 kN, limiting speed 4,300 r/min." }, { "q": "What does the designation 1726209B-2RS1/VP274 mean?", "a": "1726209 belongs to the 172 family: deep-groove ball geometry to the ISO 15 03 envelope, but the outer ring OD is sphered rather than cylindrical so it pivots inside the matching housing bore. the final two digits 09 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 45 mm (code 09 x 5) bore. VP274 supplies two-side NBR contact sealing for the B (lubrication-hole) execution; the holes let fresh grease reach the sphered-OD seat during servicing." }, { "q": "What do B and VP274 mean?", "a": "B denotes lubrication holes in the outer ring (only on standard-inner-ring executions); VP274 is the NBR contact-seal package on both sides. The B-2RS1/VP274 article is therefore sealed yet re-lubricatable through the housing." }, { "q": "Is 1726209-B-2RS1-VP274 the same as a 6309 sealed deep-groove bearing?", "a": "The 45x85x19 mm envelope and ratings follow the 63-series plan, but the OUTER surface is spherically ground for a Y-housing; pressing it into a normal cylindrical bore defeats its design. Treat it as an insert, not a drop-in 63-bearing." } ], "cross_ref": [ { "equiv_sku": "1726209-2RS1", "equiv_brand": "SKF", "level": "full", "note": "Same 45x85x19 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; 1726209-2RS1 is the standard inner ring, fit-located execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "6209", "equiv_brand": "SKF", "level": "full", "note": "SKF SKF 6209 shares the 45x85x19 mm ISO 15 dimension-series 03 envelope and ratings within 10 %, but this SKF insert has a SPHERED outside surface for a Y-housing while 6209 has a cylindrical OD for a machined bore — envelope/load match, never a drop-in substitute." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "1726209-B-2RS1-VP274", "1726209B-2RS1/VP274" ], "locale_variants": {} }, { "sku": "1726209-2RS1", "brand": "SKF", "manufacturer_designation": "1726209-2RS1", "series": "17262-series", "type": "insert", "d_mm": 45, "D_mm": 85, "B_mm": 19, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 33.2, "static_load_kN": 21.6, "fatigue_load_limit_kN": 0.915, "limiting_speed_rpm": 5000, "max_rpm": 5000, "weight_g": 400, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "1726209-2RS1 is SKF's 45 mm-bore insert bearing with a standard (non-extended) inner ring in the 17262 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 45x85x19 mm. Unlike the extended-ring Y executions this is a standard-width sealed deep-groove ball insert: normal-width inner ring, spherically ground outer ring, static self-alignment only through the housing seat. the 172 prefix identifies insert bearings with a STANDARD (non-extended) inner ring; 62 after it gives the sphered-OD ISO 15 dimension series 02 and 63 the series 03, so 1726209 follows the 63-series deep-groove ball envelope with a spherically ground outside surface. the final two digits 09 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 45 mm (code 09 x 5) bore. -2RS1 denotes nitrile contact seals moulded directly into the outer-ring recess on both sides; there is no separate flinger, which suits the standard-inner-ring 172-execution mounted inside a sealed Y-housing. Envelope 45x85x19 mm (1.772x3.346x0.748 in), outer ring 19 mm wide, C 33.2 kN, C0 21.6 kN, Pu 0.915 kN. The catalogue publishes a single speed ceiling, the limiting speed: 5,000 r/min; mass 400 g. Selection figures for 1726209-2RS1: C0/C is 0.651, Pu 0.915 kN is 2.756 % of the 33.2 kN dynamic rating, and the 400 g catalogue mass works out to roughly 8.889 g per millimetre of the 45 mm bore. Mounting verification on 1726209-2RS1 uses the printed catalogue procedure rather than torque guessing. Static-first planning: the 1.137 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 45 mm shaft, not the 33.2 kN L10 value. Spherical-seat note in numbers: the 85 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 65 = 204.204 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Fatigue-limit check: Pu 0.915 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for 1726209-2RS1 — most belt-driven mounted-unit loads sit comfortably under 2.756 % of C. Standard-inner-ring note: unlike YAR/YEL/YSP inserts this 172 execution has NO shaft locking device and NO extended ring — it locates by fits like a normal sealed deep-groove ball bearing, while the sphered outside surface still provides static self-alignment inside the Y-housing. Fit note for 1726209-2RS1: because no locking device exists, shaft and housing fits do the locating work; treat the fit recommendations for sealed deep-groove bearings, and let the spherical OD pivot in the housing rather than forcing axial alignment.", "applications": [ "general machinery using Y-flange and Y-pillow housings", "Y-housing units on standard machined shafts", "fan and conveyor positions ordered as ISO-envelope spares" ], "failure_modes": [ "VP274/B lubrication holes blocked by a misaligned housing groove starve the spherical seat during re-greasing", "shaft fit wrong (no locking device exists): too loose creeps, too tight removes the residual clearance the spherical seat relies on", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess" ], "pitfalls": [ "When ordering a like-for-like replacement, note whether the old part carried the B lubrication-hole execution: housing grooves aligned to B holes leave the non-B seal-only variant without its re-greasing path.", "No locking device means shaft preparation is everything for 1726209-2RS1: observe the fit, abutment and circlip recommendations rather than expecting screws or a collar to rescue a loose shaft.", "The 45x85 mm envelope matching a 63-series bearing tempts substitution into a cylindrical housing — do not: the sphered OD only works in the mating spherical Y-housing bore.", "Ordering discipline for the 45 mm size: the chapter lists several executions side by side (17262 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of 1726209-2RS1?", "a": "1726209-2RS1 measures 45 mm bore x 85 mm OD x 19 mm overall width (outer ring 19 mm wide), 1.772 x 3.346 x 0.748 in; mass about 400 g. SKF 17000 ratings: C 33.2 kN, C0 21.6 kN, Pu 0.915 kN, limiting speed 5,000 r/min." }, { "q": "What does the designation 1726209-2RS1 mean?", "a": "the 172 prefix identifies insert bearings with a STANDARD (non-extended) inner ring; 62 after it gives the sphered-OD ISO 15 dimension series 02 and 63 the series 03, so 1726209 follows the 63-series deep-groove ball envelope with a spherically ground outside surface. the final two digits 09 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 45 mm (code 09 x 5) bore. -2RS1 denotes nitrile contact seals moulded directly into the outer-ring recess on both sides; there is no separate flinger, which suits the standard-inner-ring 172-execution mounted inside a sealed Y-housing." }, { "q": "What do B and VP274 mean?", "a": "B denotes lubrication holes in the outer ring (only on standard-inner-ring executions); VP274 is the NBR contact-seal package on both sides. The B-2RS1/VP274 article is therefore sealed yet re-lubricatable through the housing." }, { "q": "Is 1726209-2RS1 the same as a 6309 sealed deep-groove bearing?", "a": "The 45x85x19 mm envelope and ratings follow the 63-series plan, but the OUTER surface is spherically ground for a Y-housing; pressing it into a normal cylindrical bore defeats its design. Treat it as an insert, not a drop-in 63-bearing." } ], "cross_ref": [ { "equiv_sku": "1726209-B-2RS1-VP274", "equiv_brand": "SKF", "level": "full", "note": "Same 45x85x19 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; 1726209B-2RS1/VP274 is the standard inner ring, fit-located execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "6209", "equiv_brand": "SKF", "level": "full", "note": "SKF SKF 6209 shares the 45x85x19 mm ISO 15 dimension-series 03 envelope and ratings within 10 %, but this SKF insert has a SPHERED outside surface for a Y-housing while 6209 has a cylindrical OD for a machined bore — envelope/load match, never a drop-in substitute." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "1726209-2RS1" ], "locale_variants": {} }, { "sku": "1726309-2RS1", "brand": "SKF", "manufacturer_designation": "1726309-2RS1", "series": "17263-series", "type": "insert", "d_mm": 45, "D_mm": 100, "B_mm": 25, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 52.7, "static_load_kN": 31.5, "fatigue_load_limit_kN": 1.34, "limiting_speed_rpm": 4500, "max_rpm": 4500, "weight_g": 800, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The 17263 series order number 1726309-2RS1 is a SKF insert bearing (Y-bearing) for a 45 mm shaft: insert bearing with a standard (non-extended) inner ring, built to the ISO 15 diameter-series envelope with a sphered OD of 100 mm. The unit is a capped deep-groove ball bearing to the ISO 15 03 envelope whose outer surface is sphered instead of cylindrical, so it combines a standard fit with Y-housing alignment. reading 1726xx: 172 = insert bearing with a standard-width inner ring, 6 = ISO 15 dimension series 03 with a spherically shaped outside surface for self-aligning in a Y-housing. the final two digits 09 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 45 mm (code 09 x 5) bore. the -2RS1 suffix is the classic contact NBR seal on each side without add-on flingers — grease retention for life inside the sphered-OD ISO 15 envelope. Envelope 45x100x25 mm (1.772x3.937x0.984 in), outer ring 25 mm wide, C 52.7 kN, C0 31.5 kN, Pu 1.34 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,500 r/min; mass 800 g. Envelope arithmetic: the radial section from 45 mm bore to 100 mm OD is 27.5 mm; dividing C 52.7 kN by that section gives 1.916 kN per section millimetre, and the 25 mm overall width is 0.909x the section. Speed ceiling of 4,500 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Bore-to-OD planning: OD 100 over bore 45 is a 2.222x step, while bore/overall-width gives 1.8; the spherical seat in the matching Y-housing must be specified to the 100 mm OD, not to a cylindrical housing bore. Pitch-diameter arithmetic: dm = (45+100)/2 = 72.5 mm; at the 4,500 r/min limiting speed the ball set runs at dn approx 3.26x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. At the printed limiting speed of 4,500 r/min the mean diameter dm = 72.5 mm implies dn about 3.26x10^5 mm.r/min — the speed-demand figure used when comparing this insert with open deep-groove sizes of the same bore. Standard-inner-ring note: unlike YAR/YEL/YSP inserts this 172 execution has NO shaft locking device and NO extended ring — it locates by fits like a normal sealed deep-groove ball bearing, while the sphered outside surface still provides static self-alignment inside the Y-housing. Fit note for 1726309-2RS1: because no locking device exists, shaft and housing fits do the locating work; treat the fit recommendations for sealed deep-groove bearings, and let the spherical OD pivot in the housing rather than forcing axial alignment.", "applications": [ "general machinery using Y-flange and Y-pillow housings", "Y-housing units on standard machined shafts", "fan and conveyor positions ordered as ISO-envelope spares" ], "failure_modes": [ "treated as a normal cylindrical-OD bearing and pressed into a plain bore: the sphered outer surface cannot locate radially without the matching spherical housing seat", "VP274/B lubrication holes blocked by a misaligned housing groove starve the spherical seat during re-greasing", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "misalignment beyond the static seat capability loads the seals continuously, wearing one lip through in weeks", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "The 45x100 mm envelope matching a 63-series bearing tempts substitution into a cylindrical housing — do not: the sphered OD only works in the mating spherical Y-housing bore.", "No locking device means shaft preparation is everything for 1726309-2RS1: observe the fit, abutment and circlip recommendations rather than expecting screws or a collar to rescue a loose shaft.", "When ordering a like-for-like replacement, note whether the old part carried the B lubrication-hole execution: housing grooves aligned to B holes leave the non-B seal-only variant without its re-greasing path.", "Catalogue ratings belong to 1726309-2RS1 as the standard std rs1 execution; other order numbers of the 1726309 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation." ], "faq": [ { "q": "What are the dimensions and catalogue data of 1726309-2RS1?", "a": "Boundary dimensions: bore 45 mm, sphered OD 100 mm, overall width 25 mm; weight 800 g. Loads: dynamic 52.7 kN, static 31.5 kN, fatigue 1.34 kN; the only published speed is the 4,500 r/min limiting value." }, { "q": "What does the designation 1726309-2RS1 mean?", "a": "reading 1726xx: 172 = insert bearing with a standard-width inner ring, 6 = ISO 15 dimension series 03 with a spherically shaped outside surface for self-aligning in a Y-housing. the final two digits 09 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 45 mm (code 09 x 5) bore. the -2RS1 suffix is the classic contact NBR seal on each side without add-on flingers — grease retention for life inside the sphered-OD ISO 15 envelope." }, { "q": "Is 1726309-2RS1 the same as a 6309 sealed deep-groove bearing?", "a": "The 45x100x25 mm envelope and ratings follow the 63-series plan, but the OUTER surface is spherically ground for a Y-housing; pressing it into a normal cylindrical bore defeats its design. Treat it as an insert, not a drop-in 63-bearing." }, { "q": "What is a 172-series insert bearing?", "a": "It is an insert bearing with a STANDARD-width inner ring (172 prefix) instead of the extended YAR/YEL/YSP rings; the next digits give the sphered-OD ISO 15 dimension series — 62 for series 02 and 63 for series 03. It locks by fits, like a normal sealed deep-groove bearing, not by screws or a collar." } ], "cross_ref": [ { "equiv_sku": "1726309-B-2RS1-VP274", "equiv_brand": "SKF", "level": "full", "note": "Same 45x100x25 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; 1726309B-2RS1/VP274 is the standard inner ring, fit-located execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "6309", "equiv_brand": "SKF", "level": "full", "note": "SKF SKF 6309 shares the 45x100x25 mm ISO 15 dimension-series 03 envelope and ratings within 10 %, but this SKF insert has a SPHERED outside surface for a Y-housing while 6309 has a cylindrical OD for a machined bore — envelope/load match, never a drop-in substitute." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "1726309-2RS1" ], "locale_variants": {} }, { "sku": "1726309-B-2RS1-VP274", "brand": "SKF", "manufacturer_designation": "1726309B-2RS1/VP274", "series": "17263-series", "type": "insert", "d_mm": 45, "D_mm": 100, "B_mm": 25, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 52.7, "static_load_kN": 31.5, "fatigue_load_limit_kN": 1.34, "limiting_speed_rpm": 4500, "max_rpm": 4500, "weight_g": 810, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The 17263 series order number 1726309B-2RS1/VP274 is a SKF insert bearing (Y-bearing) for a 45 mm shaft: insert bearing with a standard (non-extended) inner ring, built to the ISO 15 diameter-series envelope with a sphered OD of 100 mm. The unit is a capped deep-groove ball bearing to the ISO 15 03 envelope whose outer surface is sphered instead of cylindrical, so it combines a standard fit with Y-housing alignment. reading 1726xx: 172 = insert bearing with a standard-width inner ring, 6 = ISO 15 dimension series 03 with a spherically shaped outside surface for self-aligning in a Y-housing. the final two digits 09 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 45 mm (code 09 x 5) bore. the B-2RS1/VP274 designation combines outer-ring lubrication holes (B) with nitrile contact seals each side (VP274) — the sealed, re-lubricatable execution of the 172 range. Envelope 45x100x25 mm (1.772x3.937x0.984 in), outer ring 25 mm wide, C 52.7 kN, C0 31.5 kN, Pu 1.34 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,500 r/min; mass 810 g. Selection figures for 1726309B-2RS1/VP274: C0/C is 0.598, Pu 1.34 kN is 2.543 % of the 52.7 kN dynamic rating, and the 810 g catalogue mass works out to roughly 18 g per millimetre of the 45 mm bore. Capacity density: 52.7 kN from 0.810 kg of bearing steel is about 65.062 kN per kilogram, and per width millimetre the 25 mm unit carries 2.108 kN of dynamic capacity. Grease-life arithmetic is dominated by speed: at dn approx 3.26x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Static-first planning: the 1.26 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 45 mm shaft, not the 52.7 kN L10 value. Speed ceiling of 4,500 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Lubrication-hole note: the B execution carries outer-ring lubrication holes feeding the sphered outside surface; align the hole with the housing groove before clamping the cap, because a hole sealed off by a misaligned housing traps old grease and starves the spherical seat during re-lubrication. Geometry note: with the standard inner ring the 25 mm width and 45x100 mm bore/OD match the 63-series deep-groove ball envelope, while only the sphered outer surface identifies it as a Y-insert.", "applications": [ "general machinery using Y-flange and Y-pillow housings", "Y-housing units on standard machined shafts", "fan and conveyor positions ordered as ISO-envelope spares" ], "failure_modes": [ "shaft fit wrong (no locking device exists): too loose creeps, too tight removes the residual clearance the spherical seat relies on", "VP274/B lubrication holes blocked by a misaligned housing groove starve the spherical seat during re-greasing", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "No locking device means shaft preparation is everything for 1726309-B-2RS1-VP274: observe the fit, abutment and circlip recommendations rather than expecting screws or a collar to rescue a loose shaft.", "When ordering a like-for-like replacement, note whether the old part carried the B lubrication-hole execution: housing grooves aligned to B holes leave the non-B seal-only variant without its re-greasing path.", "The 45x100 mm envelope matching a 63-series bearing tempts substitution into a cylindrical housing — do not: the sphered OD only works in the mating spherical Y-housing bore.", "The 52.7/31.5 kN figures belong specifically to 1726309B-2RS1/VP274; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of 1726309-B-2RS1-VP274?", "a": "Boundary dimensions: bore 45 mm, sphered OD 100 mm, overall width 25 mm; weight 810 g. Loads: dynamic 52.7 kN, static 31.5 kN, fatigue 1.34 kN; the only published speed is the 4,500 r/min limiting value." }, { "q": "What does the designation 1726309B-2RS1/VP274 mean?", "a": "reading 1726xx: 172 = insert bearing with a standard-width inner ring, 6 = ISO 15 dimension series 03 with a spherically shaped outside surface for self-aligning in a Y-housing. the final two digits 09 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 45 mm (code 09 x 5) bore. the B-2RS1/VP274 designation combines outer-ring lubrication holes (B) with nitrile contact seals each side (VP274) — the sealed, re-lubricatable execution of the 172 range." }, { "q": "Is 1726309-B-2RS1-VP274 the same as a 6309 sealed deep-groove bearing?", "a": "The 45x100x25 mm envelope and ratings follow the 63-series plan, but the OUTER surface is spherically ground for a Y-housing; pressing it into a normal cylindrical bore defeats its design. Treat it as an insert, not a drop-in 63-bearing." }, { "q": "What is a 172-series insert bearing?", "a": "It is an insert bearing with a STANDARD-width inner ring (172 prefix) instead of the extended YAR/YEL/YSP rings; the next digits give the sphered-OD ISO 15 dimension series — 62 for series 02 and 63 for series 03. It locks by fits, like a normal sealed deep-groove bearing, not by screws or a collar." } ], "cross_ref": [ { "equiv_sku": "1726309-2RS1", "equiv_brand": "SKF", "level": "full", "note": "Same 45x100x25 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; 1726309-2RS1 is the standard inner ring, fit-located execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "6309", "equiv_brand": "SKF", "level": "full", "note": "SKF SKF 6309 shares the 45x100x25 mm ISO 15 dimension-series 03 envelope and ratings within 10 %, but this SKF insert has a SPHERED outside surface for a Y-housing while 6309 has a cylindrical OD for a machined bore — envelope/load match, never a drop-in substitute." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "1726309-B-2RS1-VP274", "1726309B-2RS1/VP274" ], "locale_variants": {} }, { "sku": "1726210-2RS1", "brand": "SKF", "manufacturer_designation": "1726210-2RS1", "series": "17262-series", "type": "insert", "d_mm": 50, "D_mm": 90, "B_mm": 20, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 35.1, "static_load_kN": 23.2, "fatigue_load_limit_kN": 0.98, "limiting_speed_rpm": 4800, "max_rpm": 4800, "weight_g": 440, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The 17262 series order number 1726210-2RS1 is a SKF insert bearing (Y-bearing) for a 50 mm shaft: insert bearing with a standard (non-extended) inner ring, built to the ISO 15 diameter-series envelope with a sphered OD of 90 mm. The unit is a capped deep-groove ball bearing to the ISO 15 03 envelope whose outer surface is sphered instead of cylindrical, so it combines a standard fit with Y-housing alignment. reading 1726xx: 172 = insert bearing with a standard-width inner ring, 6 = ISO 15 dimension series 03 with a spherically shaped outside surface for self-aligning in a Y-housing. the final two digits 10 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 50 mm (code 10 x 5) bore. the -2RS1 suffix is the classic contact NBR seal on each side without add-on flingers — grease retention for life inside the sphered-OD ISO 15 envelope. Envelope 50x90x20 mm (1.969x3.543x0.787 in), outer ring 20 mm wide, C 35.1 kN, C0 23.2 kN, Pu 0.98 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,800 r/min; mass 440 g. Grease-life arithmetic is dominated by speed: at dn approx 3.36x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Mass-to-load ratio for 1726210-2RS1: 12.536 g of catalogue mass per rated kN of C, and 8.8 g per millimetre of bore — useful when comparing executions of the same 50x90 mm envelope on the drawing. Load balance for documentation: C0 23.2 kN against C 35.1 kN gives a 0.661 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Imperial procurement cross-check: 1.969 in bore, 3.543 in OD, 0.787 in overall width; the 440 g mass converts to 0.440 kg (15.5 oz) for the bill of materials. Pitch-diameter arithmetic: dm = (50+90)/2 = 70 mm; at the 4,800 r/min limiting speed the ball set runs at dn approx 3.36x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Standard-inner-ring note: unlike YAR/YEL/YSP inserts this 172 execution has NO shaft locking device and NO extended ring — it locates by fits like a normal sealed deep-groove ball bearing, while the sphered outside surface still provides static self-alignment inside the Y-housing. Fit note for 1726210-2RS1: because no locking device exists, shaft and housing fits do the locating work; treat the fit recommendations for sealed deep-groove bearings, and let the spherical OD pivot in the housing rather than forcing axial alignment.", "applications": [ "Y-housing units on standard machined shafts", "general machinery using Y-flange and Y-pillow housings", "fan and conveyor positions ordered as ISO-envelope spares" ], "failure_modes": [ "VP274/B lubrication holes blocked by a misaligned housing groove starve the spherical seat during re-greasing", "treated as a normal cylindrical-OD bearing and pressed into a plain bore: the sphered outer surface cannot locate radially without the matching spherical housing seat", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "relubricated with incompatible grease that hardens the factory fill and drags the seals" ], "pitfalls": [ "When ordering a like-for-like replacement, note whether the old part carried the B lubrication-hole execution: housing grooves aligned to B holes leave the non-B seal-only variant without its re-greasing path.", "The 50x90 mm envelope matching a 63-series bearing tempts substitution into a cylindrical housing — do not: the sphered OD only works in the mating spherical Y-housing bore.", "No locking device means shaft preparation is everything for 1726210-2RS1: observe the fit, abutment and circlip recommendations rather than expecting screws or a collar to rescue a loose shaft.", "Ordering discipline for the 50 mm size: the chapter lists several executions side by side (17262 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of 1726210-2RS1?", "a": "Boundary dimensions: bore 50 mm, sphered OD 90 mm, overall width 20 mm; weight 440 g. Loads: dynamic 35.1 kN, static 23.2 kN, fatigue 0.98 kN; the only published speed is the 4,800 r/min limiting value." }, { "q": "What does the designation 1726210-2RS1 mean?", "a": "reading 1726xx: 172 = insert bearing with a standard-width inner ring, 6 = ISO 15 dimension series 03 with a spherically shaped outside surface for self-aligning in a Y-housing. the final two digits 10 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 50 mm (code 10 x 5) bore. the -2RS1 suffix is the classic contact NBR seal on each side without add-on flingers — grease retention for life inside the sphered-OD ISO 15 envelope." }, { "q": "What is a 172-series insert bearing?", "a": "It is an insert bearing with a STANDARD-width inner ring (172 prefix) instead of the extended YAR/YEL/YSP rings; the next digits give the sphered-OD ISO 15 dimension series — 62 for series 02 and 63 for series 03. It locks by fits, like a normal sealed deep-groove bearing, not by screws or a collar." }, { "q": "How is axial position secured with no locking device?", "a": "Through the recommended shaft and housing fits, abutments and any snap rings per the catalogue — there are no screws, collar or sleeve. The spherical OD still supplies the static self-alignment in the Y-housing." } ], "cross_ref": [ { "equiv_sku": "6210", "equiv_brand": "SKF", "level": "full", "note": "SKF SKF 6210 shares the 50x90x20 mm ISO 15 dimension-series 03 envelope and ratings within 10 %, but this SKF insert has a SPHERED outside surface for a Y-housing while 6210 has a cylindrical OD for a machined bore — envelope/load match, never a drop-in substitute." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "1726210-2RS1" ], "locale_variants": {} }, { "sku": "1726310-B-2RS1-VP274", "brand": "SKF", "manufacturer_designation": "1726310B-2RS1/VP274", "series": "17263-series", "type": "insert", "d_mm": 50, "D_mm": 110, "B_mm": 27, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 61.8, "static_load_kN": 38, "fatigue_load_limit_kN": 1.6, "limiting_speed_rpm": 4300, "max_rpm": 4300, "weight_g": 1000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The 17263 series order number 1726310B-2RS1/VP274 is a SKF insert bearing (Y-bearing) for a 50 mm shaft: insert bearing with a standard (non-extended) inner ring, built to the ISO 15 diameter-series envelope with a sphered OD of 110 mm. The unit is a capped deep-groove ball bearing to the ISO 15 03 envelope whose outer surface is sphered instead of cylindrical, so it combines a standard fit with Y-housing alignment. reading 1726xx: 172 = insert bearing with a standard-width inner ring, 6 = ISO 15 dimension series 03 with a spherically shaped outside surface for self-aligning in a Y-housing. the final two digits 10 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 50 mm (code 10 x 5) bore. the B-2RS1/VP274 designation combines outer-ring lubrication holes (B) with nitrile contact seals each side (VP274) — the sealed, re-lubricatable execution of the 172 range. Envelope 50x110x27 mm (1.969x4.331x1.063 in), outer ring 27 mm wide, C 61.8 kN, C0 38 kN, Pu 1.6 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,300 r/min; mass 1000 g. Mass-to-load ratio for 1726310-B-2RS1-VP274: 16.181 g of catalogue mass per rated kN of C, and 20 g per millimetre of bore — useful when comparing executions of the same 50x110 mm envelope on the drawing. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 68.7 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the inner flinger. Static-first planning: the 1.407 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 50 mm shaft, not the 61.8 kN L10 value. Bore-to-OD planning: OD 110 over bore 50 is a 2.2x step, while bore/overall-width gives 1.852; the spherical seat in the matching Y-housing must be specified to the 110 mm OD, not to a cylindrical housing bore. Capacity density: 61.8 kN from 1.000 kg of bearing steel is about 61.8 kN per kilogram, and per width millimetre the 27 mm unit carries 2.289 kN of dynamic capacity. Lubrication-hole note: the B execution carries outer-ring lubrication holes feeding the sphered outside surface; align the hole with the housing groove before clamping the cap, because a hole sealed off by a misaligned housing traps old grease and starves the spherical seat during re-lubrication. Fit note for 1726310-B-2RS1-VP274: because no locking device exists, shaft and housing fits do the locating work; treat the fit recommendations for sealed deep-groove bearings, and let the spherical OD pivot in the housing rather than forcing axial alignment.", "applications": [ "fan and conveyor positions ordered as ISO-envelope spares", "Y-housing units on standard machined shafts", "general machinery using Y-flange and Y-pillow housings" ], "failure_modes": [ "shaft fit wrong (no locking device exists): too loose creeps, too tight removes the residual clearance the spherical seat relies on", "VP274/B lubrication holes blocked by a misaligned housing groove starve the spherical seat during re-greasing", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion" ], "pitfalls": [ "No locking device means shaft preparation is everything for 1726310-B-2RS1-VP274: observe the fit, abutment and circlip recommendations rather than expecting screws or a collar to rescue a loose shaft.", "The 50x110 mm envelope matching a 63-series bearing tempts substitution into a cylindrical housing — do not: the sphered OD only works in the mating spherical Y-housing bore.", "When ordering a like-for-like replacement, note whether the old part carried the B lubrication-hole execution: housing grooves aligned to B holes leave the non-B seal-only variant without its re-greasing path.", "The 61.8/38 kN figures belong specifically to 1726310B-2RS1/VP274; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of 1726310-B-2RS1-VP274?", "a": "Boundary dimensions: bore 50 mm, sphered OD 110 mm, overall width 27 mm; weight 1000 g. Loads: dynamic 61.8 kN, static 38 kN, fatigue 1.6 kN; the only published speed is the 4,300 r/min limiting value." }, { "q": "What does the designation 1726310B-2RS1/VP274 mean?", "a": "reading 1726xx: 172 = insert bearing with a standard-width inner ring, 6 = ISO 15 dimension series 03 with a spherically shaped outside surface for self-aligning in a Y-housing. the final two digits 10 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 50 mm (code 10 x 5) bore. the B-2RS1/VP274 designation combines outer-ring lubrication holes (B) with nitrile contact seals each side (VP274) — the sealed, re-lubricatable execution of the 172 range." }, { "q": "How is axial position secured with no locking device?", "a": "Through the recommended shaft and housing fits, abutments and any snap rings per the catalogue — there are no screws, collar or sleeve. The spherical OD still supplies the static self-alignment in the Y-housing." }, { "q": "What do B and VP274 mean?", "a": "B denotes lubrication holes in the outer ring (only on standard-inner-ring executions); VP274 is the NBR contact-seal package on both sides. The B-2RS1/VP274 article is therefore sealed yet re-lubricatable through the housing." } ], "cross_ref": [ { "equiv_sku": "1726310-2RS1", "equiv_brand": "SKF", "level": "full", "note": "Same 50x110x27 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; 1726310-2RS1 is the standard inner ring, fit-located execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "6310", "equiv_brand": "SKF", "level": "full", "note": "SKF SKF 6310 shares the 50x110x27 mm ISO 15 dimension-series 03 envelope and ratings within 10 %, but this SKF insert has a SPHERED outside surface for a Y-housing while 6310 has a cylindrical OD for a machined bore — envelope/load match, never a drop-in substitute." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "1726310-B-2RS1-VP274", "1726310B-2RS1/VP274" ], "locale_variants": {} }, { "sku": "1726310-2RS1", "brand": "SKF", "manufacturer_designation": "1726310-2RS1", "series": "17263-series", "type": "insert", "d_mm": 50, "D_mm": 110, "B_mm": 27, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 61.8, "static_load_kN": 38, "fatigue_load_limit_kN": 1.6, "limiting_speed_rpm": 4300, "max_rpm": 4300, "weight_g": 1050, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The 17263 series order number 1726310-2RS1 is a SKF insert bearing (Y-bearing) for a 50 mm shaft: insert bearing with a standard (non-extended) inner ring, built to the ISO 15 diameter-series envelope with a sphered OD of 110 mm. The unit is a capped deep-groove ball bearing to the ISO 15 03 envelope whose outer surface is sphered instead of cylindrical, so it combines a standard fit with Y-housing alignment. reading 1726xx: 172 = insert bearing with a standard-width inner ring, 6 = ISO 15 dimension series 03 with a spherically shaped outside surface for self-aligning in a Y-housing. the final two digits 10 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 50 mm (code 10 x 5) bore. the -2RS1 suffix is the classic contact NBR seal on each side without add-on flingers — grease retention for life inside the sphered-OD ISO 15 envelope. Envelope 50x110x27 mm (1.969x4.331x1.063 in), outer ring 27 mm wide, C 61.8 kN, C0 38 kN, Pu 1.6 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,300 r/min; mass 1050 g. Grease-life arithmetic is dominated by speed: at dn approx 3.44x10^5 the sealed-for-life fill is planned for the catalogue's grease-life regime, which is why the limiting speed and the relubrication interval move together, and high-temperature mounts shorten both even when load is light. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 68.7 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the inner flinger. Spherical-seat note in numbers: the 110 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 80 = 251.327 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Bore-to-OD planning: OD 110 over bore 50 is a 2.2x step, while bore/overall-width gives 1.852; the spherical seat in the matching Y-housing must be specified to the 110 mm OD, not to a cylindrical housing bore. Speed ceiling of 4,300 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Standard-inner-ring note: unlike YAR/YEL/YSP inserts this 172 execution has NO shaft locking device and NO extended ring — it locates by fits like a normal sealed deep-groove ball bearing, while the sphered outside surface still provides static self-alignment inside the Y-housing. Geometry note: with the standard inner ring the 27 mm width and 50x110 mm bore/OD match the 63-series deep-groove ball envelope, while only the sphered outer surface identifies it as a Y-insert.", "applications": [ "fan and conveyor positions ordered as ISO-envelope spares", "Y-housing units on standard machined shafts", "general machinery using Y-flange and Y-pillow housings" ], "failure_modes": [ "shaft fit wrong (no locking device exists): too loose creeps, too tight removes the residual clearance the spherical seat relies on", "VP274/B lubrication holes blocked by a misaligned housing groove starve the spherical seat during re-greasing", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "relubricated with incompatible grease that hardens the factory fill and drags the seals", "pressure-greasing through the housing fitting at excessive pressure balloons the NBR seals out of their grooves" ], "pitfalls": [ "No locking device means shaft preparation is everything for 1726310-2RS1: observe the fit, abutment and circlip recommendations rather than expecting screws or a collar to rescue a loose shaft.", "The 50x110 mm envelope matching a 63-series bearing tempts substitution into a cylindrical housing — do not: the sphered OD only works in the mating spherical Y-housing bore.", "When ordering a like-for-like replacement, note whether the old part carried the B lubrication-hole execution: housing grooves aligned to B holes leave the non-B seal-only variant without its re-greasing path.", "The 61.8/38 kN figures belong specifically to 1726310-2RS1; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of 1726310-2RS1?", "a": "Boundary dimensions: bore 50 mm, sphered OD 110 mm, overall width 27 mm; weight 1050 g. Loads: dynamic 61.8 kN, static 38 kN, fatigue 1.6 kN; the only published speed is the 4,300 r/min limiting value." }, { "q": "What does the designation 1726310-2RS1 mean?", "a": "reading 1726xx: 172 = insert bearing with a standard-width inner ring, 6 = ISO 15 dimension series 03 with a spherically shaped outside surface for self-aligning in a Y-housing. the final two digits 10 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 50 mm (code 10 x 5) bore. the -2RS1 suffix is the classic contact NBR seal on each side without add-on flingers — grease retention for life inside the sphered-OD ISO 15 envelope." }, { "q": "How is axial position secured with no locking device?", "a": "Through the recommended shaft and housing fits, abutments and any snap rings per the catalogue — there are no screws, collar or sleeve. The spherical OD still supplies the static self-alignment in the Y-housing." }, { "q": "What do B and VP274 mean?", "a": "B denotes lubrication holes in the outer ring (only on standard-inner-ring executions); VP274 is the NBR contact-seal package on both sides. The B-2RS1/VP274 article is therefore sealed yet re-lubricatable through the housing." } ], "cross_ref": [ { "equiv_sku": "1726310-B-2RS1-VP274", "equiv_brand": "SKF", "level": "full", "note": "Same 50x110x27 mm ISO 15 insert-bearing envelope with catalogue ratings within 10 %; 1726310B-2RS1/VP274 is the standard inner ring, fit-located execution of this size — boundary dimensions interchangeable, locking/seal execution differs." }, { "equiv_sku": "6310", "equiv_brand": "SKF", "level": "full", "note": "SKF SKF 6310 shares the 50x110x27 mm ISO 15 dimension-series 03 envelope and ratings within 10 %, but this SKF insert has a SPHERED outside surface for a Y-housing while 6310 has a cylindrical OD for a machined bore — envelope/load match, never a drop-in substitute." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "1726310-2RS1" ], "locale_variants": {} }, { "sku": "1726211-2RS1", "brand": "SKF", "manufacturer_designation": "1726211-2RS1", "series": "17262-series", "type": "insert", "d_mm": 55, "D_mm": 100, "B_mm": 21, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 43.6, "static_load_kN": 29, "fatigue_load_limit_kN": 1.25, "limiting_speed_rpm": 4300, "max_rpm": 4300, "weight_g": 600, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The 17262 series order number 1726211-2RS1 is a SKF insert bearing (Y-bearing) for a 55 mm shaft: insert bearing with a standard (non-extended) inner ring, built to the ISO 15 diameter-series envelope with a sphered OD of 100 mm. The unit is a capped deep-groove ball bearing to the ISO 15 03 envelope whose outer surface is sphered instead of cylindrical, so it combines a standard fit with Y-housing alignment. reading 1726xx: 172 = insert bearing with a standard-width inner ring, 6 = ISO 15 dimension series 03 with a spherically shaped outside surface for self-aligning in a Y-housing. the final two digits 11 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 55 mm (code 11 x 5) bore. the -2RS1 suffix is the classic contact NBR seal on each side without add-on flingers — grease retention for life inside the sphered-OD ISO 15 envelope. Envelope 55x100x21 mm (2.165x3.937x0.827 in), outer ring 21 mm wide, C 43.6 kN, C0 29 kN, Pu 1.25 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,300 r/min; mass 600 g. Mass-to-load ratio for 1726211-2RS1: 13.761 g of catalogue mass per rated kN of C, and 10.909 g per millimetre of bore — useful when comparing executions of the same 55x100 mm envelope on the drawing. Rating split for the maintenance file: dynamic 43.6 kN (L10), static 29 kN (s0 shock check), fatigue 1.25 kN (adjusted life) — three separate uses for 1726211-2RS1, none interchangeable with another. Mounting verification on 1726211-2RS1 uses the printed catalogue procedure rather than torque guessing. Envelope arithmetic: the radial section from 55 mm bore to 100 mm OD is 22.5 mm; dividing C 43.6 kN by that section gives 1.938 kN per section millimetre, and the 21 mm overall width is 0.933x the section. Speed ceiling of 4,300 r/min is the catalogue mechanical limit for THIS execution; seal lip and flinger drag, not steel fatigue, are normally what cap it, so real fan duty is planned well below it. Standard-inner-ring note: unlike YAR/YEL/YSP inserts this 172 execution has NO shaft locking device and NO extended ring — it locates by fits like a normal sealed deep-groove ball bearing, while the sphered outside surface still provides static self-alignment inside the Y-housing. Fit note for 1726211-2RS1: because no locking device exists, shaft and housing fits do the locating work; treat the fit recommendations for sealed deep-groove bearings, and let the spherical OD pivot in the housing rather than forcing axial alignment.", "applications": [ "Y-housing units on standard machined shafts", "fan and conveyor positions ordered as ISO-envelope spares", "general machinery using Y-flange and Y-pillow housings" ], "failure_modes": [ "shaft fit wrong (no locking device exists): too loose creeps, too tight removes the residual clearance the spherical seat relies on", "VP274/B lubrication holes blocked by a misaligned housing groove starve the spherical seat during re-greasing", "water or slurry past the seal lip emulsifies the life-long grease and rusts the flinger recess", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches" ], "pitfalls": [ "No locking device means shaft preparation is everything for 1726211-2RS1: observe the fit, abutment and circlip recommendations rather than expecting screws or a collar to rescue a loose shaft.", "When ordering a like-for-like replacement, note whether the old part carried the B lubrication-hole execution: housing grooves aligned to B holes leave the non-B seal-only variant without its re-greasing path.", "The 55x100 mm envelope matching a 63-series bearing tempts substitution into a cylindrical housing — do not: the sphered OD only works in the mating spherical Y-housing bore.", "The 43.6/29 kN figures belong specifically to 1726211-2RS1; HV stainless, AG agricultural and VE495 zinc-plated variants of the same envelope publish derated values, so write the complete order number including suffixes on the purchase and maintenance records." ], "faq": [ { "q": "What are the dimensions and catalogue data of 1726211-2RS1?", "a": "Boundary dimensions: bore 55 mm, sphered OD 100 mm, overall width 21 mm; weight 600 g. Loads: dynamic 43.6 kN, static 29 kN, fatigue 1.25 kN; the only published speed is the 4,300 r/min limiting value." }, { "q": "What does the designation 1726211-2RS1 mean?", "a": "reading 1726xx: 172 = insert bearing with a standard-width inner ring, 6 = ISO 15 dimension series 03 with a spherically shaped outside surface for self-aligning in a Y-housing. the final two digits 11 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 55 mm (code 11 x 5) bore. the -2RS1 suffix is the classic contact NBR seal on each side without add-on flingers — grease retention for life inside the sphered-OD ISO 15 envelope." }, { "q": "How is axial position secured with no locking device?", "a": "Through the recommended shaft and housing fits, abutments and any snap rings per the catalogue — there are no screws, collar or sleeve. The spherical OD still supplies the static self-alignment in the Y-housing." }, { "q": "What do B and VP274 mean?", "a": "B denotes lubrication holes in the outer ring (only on standard-inner-ring executions); VP274 is the NBR contact-seal package on both sides. The B-2RS1/VP274 article is therefore sealed yet re-lubricatable through the housing." } ], "cross_ref": [ { "equiv_sku": "6211", "equiv_brand": "SKF", "level": "full", "note": "SKF SKF 6211 shares the 55x100x21 mm ISO 15 dimension-series 03 envelope and ratings within 10 %, but this SKF insert has a SPHERED outside surface for a Y-housing while 6211 has a cylindrical OD for a machined bore — envelope/load match, never a drop-in substitute." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "1726211-2RS1" ], "locale_variants": {} }, { "sku": "1726212-2RS1", "brand": "SKF", "manufacturer_designation": "1726212-2RS1", "series": "17262-series", "type": "insert", "d_mm": 60, "D_mm": 110, "B_mm": 22, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 52.7, "static_load_kN": 36, "fatigue_load_limit_kN": 1.53, "limiting_speed_rpm": 4000, "max_rpm": 4000, "weight_g": 770, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The 17262 series order number 1726212-2RS1 is a SKF insert bearing (Y-bearing) for a 60 mm shaft: insert bearing with a standard (non-extended) inner ring, built to the ISO 15 diameter-series envelope with a sphered OD of 110 mm. The unit is a capped deep-groove ball bearing to the ISO 15 03 envelope whose outer surface is sphered instead of cylindrical, so it combines a standard fit with Y-housing alignment. reading 1726xx: 172 = insert bearing with a standard-width inner ring, 6 = ISO 15 dimension series 03 with a spherically shaped outside surface for self-aligning in a Y-housing. the final two digits 12 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 60 mm (code 12 x 5) bore. the -2RS1 suffix is the classic contact NBR seal on each side without add-on flingers — grease retention for life inside the sphered-OD ISO 15 envelope. Envelope 60x110x22 mm (2.362x4.331x0.866 in), outer ring 22 mm wide, C 52.7 kN, C0 36 kN, Pu 1.53 kN. The catalogue publishes a single speed ceiling, the limiting speed: 4,000 r/min; mass 770 g. Capacity density: 52.7 kN from 0.770 kg of bearing steel is about 68.442 kN per kilogram, and per width millimetre the 22 mm unit carries 2.395 kN of dynamic capacity. Static-first planning: the 1.636 kN of C0 per overall-width millimetre is the figure for belt tension peaks and rotor imbalance standstill loads on the 60 mm shaft, not the 52.7 kN L10 value. Mounting verification on 1726212-2RS1 uses the printed catalogue procedure rather than torque guessing. Spherical-seat note in numbers: the 110 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 85 = 267.035 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Fatigue-limit check: Pu 1.53 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for 1726212-2RS1 — most belt-driven mounted-unit loads sit comfortably under 2.903 % of C. Standard-inner-ring note: unlike YAR/YEL/YSP inserts this 172 execution has NO shaft locking device and NO extended ring — it locates by fits like a normal sealed deep-groove ball bearing, while the sphered outside surface still provides static self-alignment inside the Y-housing. Fit note for 1726212-2RS1: because no locking device exists, shaft and housing fits do the locating work; treat the fit recommendations for sealed deep-groove bearings, and let the spherical OD pivot in the housing rather than forcing axial alignment.", "applications": [ "process positions where the spherical seat and a normal fit are both required", "heavy Y-housed conveyor and fan shafts" ], "failure_modes": [ "VP274/B lubrication holes blocked by a misaligned housing groove starve the spherical seat during re-greasing", "treated as a normal cylindrical-OD bearing and pressed into a plain bore: the sphered outer surface cannot locate radially without the matching spherical housing seat", "two bearings of the same size but different locking styles swapped during overhaul — shaft preparation (dimples, collar space, sleeve seat) no longer matches", "sphered OD and spherical housing bore left dry or painted over: the static self-aligning feature freezes solid with corrosion", "relubricated with incompatible grease that hardens the factory fill and drags the seals" ], "pitfalls": [ "When ordering a like-for-like replacement, note whether the old part carried the B lubrication-hole execution: housing grooves aligned to B holes leave the non-B seal-only variant without its re-greasing path.", "No locking device means shaft preparation is everything for 1726212-2RS1: observe the fit, abutment and circlip recommendations rather than expecting screws or a collar to rescue a loose shaft.", "The 60x110 mm envelope matching a 63-series bearing tempts substitution into a cylindrical housing — do not: the sphered OD only works in the mating spherical Y-housing bore.", "Ordering discipline for the 60 mm size: the chapter lists several executions side by side (17262 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption." ], "faq": [ { "q": "What are the dimensions and catalogue data of 1726212-2RS1?", "a": "Boundary dimensions: bore 60 mm, sphered OD 110 mm, overall width 22 mm; weight 770 g. Loads: dynamic 52.7 kN, static 36 kN, fatigue 1.53 kN; the only published speed is the 4,000 r/min limiting value." }, { "q": "What does the designation 1726212-2RS1 mean?", "a": "reading 1726xx: 172 = insert bearing with a standard-width inner ring, 6 = ISO 15 dimension series 03 with a spherically shaped outside surface for self-aligning in a Y-housing. the final two digits 12 follow the standard bore-code rule (03 = 17 mm, then x5), giving a 60 mm (code 12 x 5) bore. the -2RS1 suffix is the classic contact NBR seal on each side without add-on flingers — grease retention for life inside the sphered-OD ISO 15 envelope." }, { "q": "What do B and VP274 mean?", "a": "B denotes lubrication holes in the outer ring (only on standard-inner-ring executions); VP274 is the NBR contact-seal package on both sides. The B-2RS1/VP274 article is therefore sealed yet re-lubricatable through the housing." }, { "q": "Is 1726212-2RS1 the same as a 6312 sealed deep-groove bearing?", "a": "The 60x110x22 mm envelope and ratings follow the 63-series plan, but the OUTER surface is spherically ground for a Y-housing; pressing it into a normal cylindrical bore defeats its design. Treat it as an insert, not a drop-in 63-bearing." } ], "cross_ref": [ { "equiv_sku": "6212", "equiv_brand": "SKF", "level": "full", "note": "SKF SKF 6212 shares the 60x110x22 mm ISO 15 dimension-series 03 envelope and ratings within 10 %, but this SKF insert has a SPHERED outside surface for a Y-housing while 6212 has a cylindrical OD for a machined bore — envelope/load match, never a drop-in substitute." } ], "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018)", "extracted_at": "2026-09-28", "last_verified": "2026-09-28", "confidence_score": 0.7, "status": "published", "aliases": [ "1726212-2RS1" ], "locale_variants": {} } ]