[ { "sku": "AXK0414-TN", "brand": "SKF", "manufacturer_designation": "AXK 0414 TN", "series": "AXK-series", "type": "needle_roller_thrust", "d_mm": 4, "D_mm": 14, "B_mm": 2, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "polymer_PA66", "dynamic_load_kN": 4.15, "static_load_kN": 8.3, "fatigue_load_limit_kN": 0.95, "reference_speed_rpm": 7500, "limiting_speed_rpm": 15000, "max_rpm": 15000, "weight_g": 0.7, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 3031", "naming_rule_text": "In SKF catalogue PUB BU/P1 17000, AXK 0414 TN denotes the needle thrust assembly whose code reads the raceway diameters directly — 04/14 — intended to run against hardened, ground washers or machine faces. In AXK 0414 TN the number is the boundary plan, not a bore code: 04/14, with the 2 mm assembly thickness fixed by the ISO 3031 plan and Ea/Eb 5/13 mm marking the actual needle-contact band. The thin section tolerates no misalignment: keep the mating faces parallel, and use the AXW spigot-flanged execution where a one-piece, housing-centred cage-plus-washer unit simplifies assembly. Static safety matters for shock duty: compare peak axial force against C0 8.3 kN with the application's static factor, since crane hooks and screw positions see their worst load at zero or low speed. Mounting: harden and grind both mating faces to 58–64 HRC over the full Ea 5–Eb 13 mm band (or fit AS/LS washers), drop the 2 mm cage in flat, and never press or hammer the needle complement.", "applications": [ "two-wheeler gearbox selector and layshaft thrust faces", "compact drives where hardened washers replace a machined raceway shoulder", "automotive manual and automatic transmission thrust positions", "torque converter and clutch release assemblies in passenger cars" ], "failure_modes": [ "needle-row denting from a single hard particle trapped in the 2 mm section", "roller skidding and raceway glazing once the thrust falls below the catalogue minimum axial load (factor A)", "oil starvation at the sliding contact zones of large spherical roller thrust bearings on forced-feed trips", "rolling-contact fatigue spalling after the catalogue L10 life is exhausted", "instant raceway scoring when the assembly runs against a face below 58 HRC or with a rough finish" ], "pitfalls": [ "The AXK 0414 TN is watchmaking-scale (2 mm thick, 0.7 g): handle it with tweezers, grease it onto its washer, and assume one dropped or cocked assembly is one ruined bearing.", "Do not expect misalignment tolerance: a 2 mm rigid needle set edge-loads if the faces tilt even a fraction of a degree — use a spherical or AXW solution where the seat cannot be kept parallel.", "TN polymer and stamped steel cages of the same code (AXK 0414) share envelopes and ratings; the choice is temperature and noise, not load.", "The 4.15 kN rating is real only at 58–64 HRC face hardness; visual inspection cannot tell a 45 HRC washer from a 60 HRC one — order certified washers.", "The AXK code supplies no washers: AXK 0414 TN arrives as the needle cage only, and a \"bearing failure\" on hard-faced tracks is usually a missing-AS-washer failure at ordering time.", "The 4.15/8.3 kN ratings and 0.7 g mass are SKF catalogue values transcribed from ch. 12.1 of PUB BU/P1 17000 (PDF table page 908); mounting data — Ea/Eb raceway diameters and the minimum load factor A — appears in the running text because the structured record carries the boundary envelope only." ], "faq": [ { "q": "Does the AXK 0414 TN include washers?", "a": "No. AXK is the needle roller and cage thrust assembly only; hardened AS/LS washers or shaft/housing faces at 58–64 HRC, ground over the Ea 5–Eb 13 mm band, supply the two raceways." }, { "q": "How is the AXK 0414 TN code read?", "a": "AXK marks the needle thrust assembly and 04/14 gives the inner 4 mm and outer 14 mm track diameters directly; the assembly is 2 mm thick. TN means the polymer cage instead of stamped steel." }, { "q": "What minimum hardness do the mating faces need?", "a": "58–64 HRC with a ground raceway finish. A softer face looks fine after assembly but the needles rib and score it within weeks despite the 4.15 kN catalogue rating — order certified washers if the shaft/housing cannot be heat treated." }, { "q": "How is an AXK thrust assembly mounted?", "a": "Harden or washer-face both tracks across Ea 5–Eb 13 mm, keep faces parallel, locate the cage concentrically against a shoulder or register, grease the needles so they stay pocketed, and never press through them." } ], "cross_ref": [ { "equiv_sku": "AXK0414", "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://www.skf.com/group/products/rolling-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.1 needle roller and cage thrust assemblies", "extracted_at": "2026-09-27", "last_verified": "2026-09-27", "confidence_score": 0.7, "status": "published", "aliases": [ "AXK0414-TN", "AXK 0414 TN" ], "locale_variants": {} }, { "sku": "AXK0515-TN", "brand": "SKF", "manufacturer_designation": "AXK 0515 TN", "series": "AXK-series", "type": "needle_roller_thrust", "d_mm": 5, "D_mm": 15, "B_mm": 2, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "polymer_PA66", "dynamic_load_kN": 4.5, "static_load_kN": 9.5, "fatigue_load_limit_kN": 1.08, "reference_speed_rpm": 6700, "limiting_speed_rpm": 14000, "max_rpm": 14000, "weight_g": 0.8, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 3031", "naming_rule_text": "For transmission gears that would otherwise rub on a housing wall, AXK 0515 TN supplies a complete needle thrust track between 6 and 14 mm raceway diameters in a 2 mm envelope. SKF prints the AXK sizes as adjacent figures, so 05/15 reads 5 then 15 mm; the assembly has no washers of its own — order AS/LS washers or harden the mating faces. The thin section tolerates no misalignment: keep the mating faces parallel, and use the AXW spigot-flanged execution where a one-piece, housing-centred cage-plus-washer unit simplifies assembly. Speed planning separates the 6,700 r/min thermal reference from the 14,000 r/min mechanical limiting speed. Thrust bearings govern the thermal speed of many vertical arrangements, and oil circulation raises the usable speed substantially above grease values. Keep the assembly concentric with a shaft shoulder or the housing register — a needle set walking radially off its track is the most common failure; the AXW flanged version removes this risk entirely.", "applications": [ "torque converter and clutch release assemblies in passenger cars", "small gearbox gears that need a 2 mm thrust shim between a shaft and face", "light turntables, index plates and office-machine pivots", "two-wheeler gearbox selector and layshaft thrust faces" ], "failure_modes": [ "needle-row denting from a single hard particle trapped in the 2 mm section", "roller skidding and raceway glazing once the thrust falls below the catalogue minimum axial load (factor A)", "abrasive paste forming as dust bypasses the housing seals into the open washer set", "electrical erosion of raceways on VFD-driven shafts without grounding or insulation", "instant raceway scoring when the assembly runs against a face below 58 HRC or with a rough finish" ], "pitfalls": [ "The AXK 0515 TN is watchmaking-scale (2 mm thick, 0.8 g): handle it with tweezers, grease it onto its washer, and assume one dropped or cocked assembly is one ruined bearing.", "Match washers by the exact 5–15 mm track — a washer sized to the shaft alone leaves the needles overrunning its edge, which shears the cage.", "the 6,700 r/min reference speed is the thermal criterion under load, the 14,000 r/min limiting speed assumes hardened, ground, oiled faces; soft or dry faces drop the real ceiling drastically.", "The 4.5 kN rating is real only at 58–64 HRC face hardness; visual inspection cannot tell a 45 HRC washer from a 60 HRC one — order certified washers.", "Do not expect misalignment tolerance: a 2 mm rigid needle set edge-loads if the faces tilt even a fraction of a degree — use a spherical or AXW solution where the seat cannot be kept parallel.", "The 4.5/9.5 kN ratings and 0.8 g mass are SKF catalogue values transcribed from ch. 12.1 of PUB BU/P1 17000 (PDF table page 908); mounting data — Ea/Eb raceway diameters and the minimum load factor A — appears in the running text because the structured record carries the boundary envelope only." ], "faq": [ { "q": "Why does an AXK assembly fail early?", "a": "Almost always the track: missing/undersized washers, hardness below 58 HRC, a sharp shoulder edge catching the cage, or contamination in the thin section. Rating 4.5 kN assumes all of these are correct." }, { "q": "Which dimensions does the AXK 0515 TN have?", "a": "A AXK 0515 TN measures 5 mm bore × 15 mm outside diameter × 2 mm width (0.197 × 0.591 × 0.079 in). From SKF catalogue PUB BU/P1 17000: dynamic C 4.5 kN, static C0 9.5 kN, fatigue limit Pu 1.08 kN, reference speed 6,700 r/min, limiting speed 14,000 r/min, mass about 0.8 g. The contact band runs Ea 6–Eb 14 mm; hardened washers or 58–64 HRC faces are required." }, { "q": "What does AXK 05/15 mean?", "a": "A needle roller and cage thrust assembly (ISO 3031) for a 5 mm inner track and 15 mm outer track, 2 mm thick; one-direction axial load, washers ordered separately." }, { "q": "What is the difference between AXK and AXW?", "a": "AXW pairs the AXK needle set with a washer carrying an integral centring spigot that locates in a housing register, keeping cage and washer concentric as one part; AXK is the bare cage-and-needle set needing two separate washers. The AXW still needs a separate LS/AS washer or hardened face on the opposite side." } ], "cross_ref": [ { "equiv_sku": "AXK0515", "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://www.skf.com/group/products/rolling-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.1 needle roller and cage thrust assemblies", "extracted_at": "2026-09-27", "last_verified": "2026-09-27", "confidence_score": 0.7, "status": "published", "aliases": [ "AXK0515-TN", "AXK 0515 TN" ], "locale_variants": {} }, { "sku": "AXK0619-TN", "brand": "SKF", "manufacturer_designation": "AXK 0619 TN", "series": "AXK-series", "type": "needle_roller_thrust", "d_mm": 6, "D_mm": 19, "B_mm": 2, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "polymer_PA66", "dynamic_load_kN": 6.3, "static_load_kN": 16, "fatigue_load_limit_kN": 1.86, "reference_speed_rpm": 6000, "limiting_speed_rpm": 12000, "max_rpm": 12000, "weight_g": 1, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 3031", "naming_rule_text": "AXK 0619 TN is a needle roller and cage thrust assembly to ISO 3031: a 2 mm thin cage packing the maximum number of small needles for a 6 mm shaft raceway and 19 mm outside track, as listed in SKF catalogue PUB BU/P1 17000 ch. 12.1. The designation AXK 0619 TN identifies a 2 mm needle thrust cage for the 6–19 mm track; the same diameters select the matching hardened washers, which is the usual ordering error to avoid. Washer selection is part of the bearing: too-soft faces rib within weeks even though the 6.3 kN rating is unchanged — the AXK code only supplies the rolling elements. No factor A is published for needle thrust sets: keep a light preload so the needles roll rather than skid — springs, shim preload or the gear's own backlash take-up are part of the selection, not an accessory. Keep the assembly concentric with a shaft shoulder or the housing register — a needle set walking radially off its track is the most common failure; the AXW flanged version removes this risk entirely.", "applications": [ "small gearbox gears that need a 2 mm thrust shim between a shaft and face", "light turntables, index plates and office-machine pivots", "two-wheeler gearbox selector and layshaft thrust faces", "compact drives where hardened washers replace a machined raceway shoulder" ], "failure_modes": [ "needle-row denting from a single hard particle trapped in the 2 mm section", "smearing at roller-raceway contacts during unloaded startup before the oil film or preload is established", "grease churning and overheating when a high-speed thrust position is over-packed", "electrical erosion of raceways on VFD-driven shafts without grounding or insulation", "instant raceway scoring when the assembly runs against a face below 58 HRC or with a rough finish" ], "pitfalls": [ "The AXK 0619 TN is watchmaking-scale (2 mm thick, 1 g): handle it with tweezers, grease it onto its washer, and assume one dropped or cocked assembly is one ruined bearing.", "Do not expect misalignment tolerance: a 2 mm rigid needle set edge-loads if the faces tilt even a fraction of a degree — use a spherical or AXW solution where the seat cannot be kept parallel.", "TN polymer and stamped steel cages of the same code (AXK 0619) share envelopes and ratings; the choice is temperature and noise, not load.", "Match washers by the exact 6–19 mm track — a washer sized to the shaft alone leaves the needles overrunning its edge, which shears the cage.", "the 6,000 r/min reference speed is the thermal criterion under load, the 12,000 r/min limiting speed assumes hardened, ground, oiled faces; soft or dry faces drop the real ceiling drastically.", "The 6.3/16 kN ratings and 1 g mass are SKF catalogue values transcribed from ch. 12.1 of PUB BU/P1 17000 (PDF table page 908); mounting data — Ea/Eb raceway diameters and the minimum load factor A — appears in the running text because the structured record carries the boundary envelope only." ], "faq": [ { "q": "What are the dimensions and ratings of the AXK 0619 TN?", "a": "A AXK 0619 TN measures 6 mm bore × 19 mm outside diameter × 2 mm width (0.236 × 0.748 × 0.079 in). From SKF catalogue PUB BU/P1 17000: dynamic C 6.3 kN, static C0 16 kN, fatigue limit Pu 1.86 kN, reference speed 6,000 r/min, limiting speed 12,000 r/min, mass about 1 g. The contact band runs Ea 7–Eb 18 mm; hardened washers or 58–64 HRC faces are required." }, { "q": "Does the AXK 0619 TN include washers?", "a": "No. AXK is the needle roller and cage thrust assembly only; hardened AS/LS washers or shaft/housing faces at 58–64 HRC, ground over the Ea 7–Eb 18 mm band, supply the two raceways." }, { "q": "How is the AXK 0619 TN code read?", "a": "AXK marks the needle thrust assembly and 06/19 gives the inner 6 mm and outer 19 mm track diameters directly; the assembly is 2 mm thick. TN means the polymer cage instead of stamped steel." }, { "q": "What minimum hardness do the mating faces need?", "a": "58–64 HRC with a ground raceway finish. A softer face looks fine after assembly but the needles rib and score it within weeks despite the 6.3 kN catalogue rating — order certified washers if the shaft/housing cannot be heat treated." } ], "cross_ref": [ { "equiv_sku": "AXK0619", "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://www.skf.com/group/products/rolling-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.1 needle roller and cage thrust assemblies", "extracted_at": "2026-09-27", "last_verified": "2026-09-27", "confidence_score": 0.7, "status": "published", "aliases": [ "AXK0619-TN", "AXK 0619 TN" ], "locale_variants": {} }, { "sku": "AXK0821-TN", "brand": "SKF", "manufacturer_designation": "AXK 0821 TN", "series": "AXK-series", "type": "needle_roller_thrust", "d_mm": 8, "D_mm": 21, "B_mm": 2, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "polymer_PA66", "dynamic_load_kN": 7.2, "static_load_kN": 20, "fatigue_load_limit_kN": 2.32, "reference_speed_rpm": 5600, "limiting_speed_rpm": 11000, "max_rpm": 11000, "weight_g": 2, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 3031", "naming_rule_text": "In SKF catalogue PUB BU/P1 17000, AXK 0821 TN denotes the needle thrust assembly whose code reads the raceway diameters directly — 08/21 — intended to run against hardened, ground washers or machine faces. In AXK 0821 TN the number is the boundary plan, not a bore code: 08/21, with the 2 mm assembly thickness fixed by the ISO 3031 plan and Ea/Eb 9/20 mm marking the actual needle-contact band. Washer selection is part of the bearing: too-soft faces rib within weeks even though the 7.2 kN rating is unchanged — the AXK code only supplies the rolling elements. Speed planning separates the 5,600 r/min thermal reference from the 11,000 r/min mechanical limiting speed. Thrust bearings govern the thermal speed of many vertical arrangements, and oil circulation raises the usable speed substantially above grease values. Grease both faces before assembly so the needles stay in their pockets, especially for the tiny 2 mm thin set; after fitting, rotate slowly and confirm the cage does not catch on the shoulder edges.", "applications": [ "torque converter and clutch release assemblies in passenger cars", "small gearbox gears that need a 2 mm thrust shim between a shaft and face", "light turntables, index plates and office-machine pivots", "two-wheeler gearbox selector and layshaft thrust faces" ], "failure_modes": [ "edge loading across the needle crowns when the mating faces are not square to the shaft", "cage wear from rollers being dragged through unloaded zones under fluctuating thrust", "abrasive paste forming as dust bypasses the housing seals into the open washer set", "condensation pitting in machines that run intermittently in humid environments", "needle-row denting from a single hard particle trapped in the 2 mm section" ], "pitfalls": [ "The AXK 0821 TN is watchmaking-scale (2 mm thick, 2 g): handle it with tweezers, grease it onto its washer, and assume one dropped or cocked assembly is one ruined bearing.", "the 5,600 r/min reference speed is the thermal criterion under load, the 11,000 r/min limiting speed assumes hardened, ground, oiled faces; soft or dry faces drop the real ceiling drastically.", "The 7.2 kN rating is real only at 58–64 HRC face hardness; visual inspection cannot tell a 45 HRC washer from a 60 HRC one — order certified washers.", "The AXK code supplies no washers: AXK 0821 TN arrives as the needle cage only, and a \"bearing failure\" on hard-faced tracks is usually a missing-AS-washer failure at ordering time.", "Match washers by the exact 8–21 mm track — a washer sized to the shaft alone leaves the needles overrunning its edge, which shears the cage.", "The 7.2/20 kN ratings and 2 g mass are SKF catalogue values transcribed from ch. 12.1 of PUB BU/P1 17000 (PDF table page 908); mounting data — Ea/Eb raceway diameters and the minimum load factor A — appears in the running text because the structured record carries the boundary envelope only." ], "faq": [ { "q": "How is the AXK 0821 TN code read?", "a": "AXK marks the needle thrust assembly and 08/21 gives the inner 8 mm and outer 21 mm track diameters directly; the assembly is 2 mm thick. TN means the polymer cage instead of stamped steel." }, { "q": "What minimum hardness do the mating faces need?", "a": "58–64 HRC with a ground raceway finish. A softer face looks fine after assembly but the needles rib and score it within weeks despite the 7.2 kN catalogue rating — order certified washers if the shaft/housing cannot be heat treated." }, { "q": "How is an AXK thrust assembly mounted?", "a": "Harden or washer-face both tracks across Ea 9–Eb 20 mm, keep faces parallel, locate the cage concentrically against a shoulder or register, grease the needles so they stay pocketed, and never press through them." }, { "q": "What are the dimensions and ratings of the AXK 0821 TN?", "a": "A AXK 0821 TN measures 8 mm bore × 21 mm outside diameter × 2 mm width (0.315 × 0.827 × 0.079 in). From SKF catalogue PUB BU/P1 17000: dynamic C 7.2 kN, static C0 20 kN, fatigue limit Pu 2.32 kN, reference speed 5,600 r/min, limiting speed 11,000 r/min, mass about 2 g. The contact band runs Ea 9–Eb 20 mm; hardened washers or 58–64 HRC faces are required." } ], "cross_ref": [ { "equiv_sku": "AXK0821", "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://www.skf.com/group/products/rolling-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.1 needle roller and cage thrust assemblies", "extracted_at": "2026-09-27", "last_verified": "2026-09-27", "confidence_score": 0.7, "status": "published", "aliases": [ "AXK0821-TN", "AXK 0821 TN" ], "locale_variants": {} }, { "sku": "AXK1024", "brand": "SKF", "manufacturer_designation": "AXK 1024", "series": "AXK-series", "type": "needle_roller_thrust", "d_mm": 10, "D_mm": 24, "B_mm": 2, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 8.5, "static_load_kN": 26, "fatigue_load_limit_kN": 3, "reference_speed_rpm": 5300, "limiting_speed_rpm": 10000, "max_rpm": 10000, "weight_g": 3, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 3031", "naming_rule_text": "SKF's AXK 1024 is not a complete bearing — the stamped steel cage spaces the thrust needles, while hardened AS/LS raceway washers (or shaft and housing faces at 58–64 HRC) provide the two raceways. SKF prints the AXK sizes as adjacent figures, so 10/24 reads 10 then 24 mm; the assembly has no washers of its own — order AS/LS washers or harden the mating faces. The thin section tolerates no misalignment: keep the mating faces parallel, and use the AXW spigot-flanged execution where a one-piece, housing-centred cage-plus-washer unit simplifies assembly. Speed planning separates the 5,300 r/min thermal reference from the 10,000 r/min mechanical limiting speed. Thrust bearings govern the thermal speed of many vertical arrangements, and oil circulation raises the usable speed substantially above grease values. Grease both faces before assembly so the needles stay in their pockets, especially for the tiny 2 mm thin set; after fitting, rotate slowly and confirm the cage does not catch on the shoulder edges.", "applications": [ "torque converter and clutch release assemblies in passenger cars", "small gearbox gears that need a 2 mm thrust shim between a shaft and face", "light turntables, index plates and office-machine pivots", "two-wheeler gearbox selector and layshaft thrust faces" ], "failure_modes": [ "needle-row denting from a single hard particle trapped in the 2 mm section", "roller skidding and raceway glazing once the thrust falls below the catalogue minimum axial load (factor A)", "grease churning and overheating when a high-speed thrust position is over-packed", "false brinelling and rust-red witness marks on standby machines under external vibration", "instant raceway scoring when the assembly runs against a face below 58 HRC or with a rough finish" ], "pitfalls": [ "The AXK 1024 is watchmaking-scale (2 mm thick, 3 g): handle it with tweezers, grease it onto its washer, and assume one dropped or cocked assembly is one ruined bearing.", "Match washers by the exact 10–24 mm track — a washer sized to the shaft alone leaves the needles overrunning its edge, which shears the cage.", "the 5,300 r/min reference speed is the thermal criterion under load, the 10,000 r/min limiting speed assumes hardened, ground, oiled faces; soft or dry faces drop the real ceiling drastically.", "The 8.5 kN rating is real only at 58–64 HRC face hardness; visual inspection cannot tell a 45 HRC washer from a 60 HRC one — order certified washers.", "Do not expect misalignment tolerance: a 2 mm rigid needle set edge-loads if the faces tilt even a fraction of a degree — use a spherical or AXW solution where the seat cannot be kept parallel.", "The 8.5/26 kN ratings and 3 g mass are SKF catalogue values transcribed from ch. 12.1 of PUB BU/P1 17000 (PDF table page 908); mounting data — Ea/Eb raceway diameters and the minimum load factor A — appears in the running text because the structured record carries the boundary envelope only." ], "faq": [ { "q": "Why does an AXK assembly fail early?", "a": "Almost always the track: missing/undersized washers, hardness below 58 HRC, a sharp shoulder edge catching the cage, or contamination in the thin section. Rating 8.5 kN assumes all of these are correct." }, { "q": "Which dimensions does the AXK 1024 have?", "a": "A AXK 1024 measures 10 mm bore × 24 mm outside diameter × 2 mm width (0.394 × 0.945 × 0.079 in). From SKF catalogue PUB BU/P1 17000: dynamic C 8.5 kN, static C0 26 kN, fatigue limit Pu 3 kN, reference speed 5,300 r/min, limiting speed 10,000 r/min, mass about 3 g. The contact band runs Ea 12–Eb 23 mm; hardened washers or 58–64 HRC faces are required." }, { "q": "What does AXK 10/24 mean?", "a": "A needle roller and cage thrust assembly (ISO 3031) for a 10 mm inner track and 24 mm outer track, 2 mm thick; one-direction axial load, washers ordered separately." }, { "q": "What is the difference between AXK and AXW?", "a": "AXW pairs the AXK needle set with a washer carrying an integral centring spigot that locates in a housing register, keeping cage and washer concentric as one part; AXK is the bare cage-and-needle set needing two separate washers. The AXW still needs a separate LS/AS washer or hardened face on the opposite side." } ], "cross_ref": [ { "equiv_sku": "AXK1024", "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://www.skf.com/group/products/rolling-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.1 needle roller and cage thrust assemblies", "extracted_at": "2026-09-27", "last_verified": "2026-09-27", "confidence_score": 0.7, "status": "published", "aliases": [ "AXK1024", "AXK 1024" ], "locale_variants": {} }, { "sku": "AXK1226", "brand": "SKF", "manufacturer_designation": "AXK 1226", "series": "AXK-series", "type": "needle_roller_thrust", "d_mm": 12, "D_mm": 26, "B_mm": 2, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 9.15, "static_load_kN": 30, "fatigue_load_limit_kN": 3.45, "reference_speed_rpm": 5000, "limiting_speed_rpm": 10000, "max_rpm": 10000, "weight_g": 3, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 3031", "naming_rule_text": "In SKF catalogue PUB BU/P1 17000, AXK 1226 denotes the needle thrust assembly whose code reads the raceway diameters directly — 12/26 — intended to run against hardened, ground washers or machine faces. The designation AXK 1226 identifies a 2 mm needle thrust cage for the 12–26 mm track; the same diameters select the matching hardened washers, which is the usual ordering error to avoid. Washer selection is part of the bearing: too-soft faces rib within weeks even though the 9.15 kN rating is unchanged — the AXK code only supplies the rolling elements. One direction only: AXK 1226 cannot be reversed to take opposite thrust — mirror a second bearing for reversing shafts, and keep housing and shaft seats square within the ISO 104 tolerances. Mounting: harden and grind both mating faces to 58–64 HRC over the full Ea 14–Eb 25 mm band (or fit AS/LS washers), drop the 2 mm cage in flat, and never press or hammer the needle complement.", "applications": [ "compact drives where hardened washers replace a machined raceway shoulder", "automotive manual and automatic transmission thrust positions", "torque converter and clutch release assemblies in passenger cars", "small gearbox gears that need a 2 mm thrust shim between a shaft and face" ], "failure_modes": [ "edge loading across the needle crowns when the mating faces are not square to the shaft", "roller skidding and raceway glazing once the thrust falls below the catalogue minimum axial load (factor A)", "oil starvation at the sliding contact zones of large spherical roller thrust bearings on forced-feed trips", "hard-particle indentation where oil or grease filtration is inadequate", "needle-row denting from a single hard particle trapped in the 2 mm section" ], "pitfalls": [ "The AXK 1226 is watchmaking-scale (2 mm thick, 3 g): handle it with tweezers, grease it onto its washer, and assume one dropped or cocked assembly is one ruined bearing.", "the 5,000 r/min reference speed is the thermal criterion under load, the 10,000 r/min limiting speed assumes hardened, ground, oiled faces; soft or dry faces drop the real ceiling drastically.", "The 9.15 kN rating is real only at 58–64 HRC face hardness; visual inspection cannot tell a 45 HRC washer from a 60 HRC one — order certified washers.", "The AXK code supplies no washers: AXK 1226 arrives as the needle cage only, and a \"bearing failure\" on hard-faced tracks is usually a missing-AS-washer failure at ordering time.", "Match washers by the exact 12–26 mm track — a washer sized to the shaft alone leaves the needles overrunning its edge, which shears the cage.", "The 9.15/30 kN ratings and 3 g mass are SKF catalogue values transcribed from ch. 12.1 of PUB BU/P1 17000 (PDF table page 908); mounting data — Ea/Eb raceway diameters and the minimum load factor A — appears in the running text because the structured record carries the boundary envelope only." ], "faq": [ { "q": "What minimum hardness do the mating faces need?", "a": "58–64 HRC with a ground raceway finish. A softer face looks fine after assembly but the needles rib and score it within weeks despite the 9.15 kN catalogue rating — order certified washers if the shaft/housing cannot be heat treated." }, { "q": "How is an AXK thrust assembly mounted?", "a": "Harden or washer-face both tracks across Ea 14–Eb 25 mm, keep faces parallel, locate the cage concentrically against a shoulder or register, grease the needles so they stay pocketed, and never press through them." }, { "q": "What are the dimensions and ratings of the AXK 1226?", "a": "A AXK 1226 measures 12 mm bore × 26 mm outside diameter × 2 mm width (0.472 × 1.024 × 0.079 in). From SKF catalogue PUB BU/P1 17000: dynamic C 9.15 kN, static C0 30 kN, fatigue limit Pu 3.45 kN, reference speed 5,000 r/min, limiting speed 10,000 r/min, mass about 3 g. The contact band runs Ea 14–Eb 25 mm; hardened washers or 58–64 HRC faces are required." }, { "q": "Does the AXK 1226 include washers?", "a": "No. AXK is the needle roller and cage thrust assembly only; hardened AS/LS washers or shaft/housing faces at 58–64 HRC, ground over the Ea 14–Eb 25 mm band, supply the two raceways." } ], "cross_ref": [ { "equiv_sku": "AXK1226", "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://www.skf.com/group/products/rolling-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.1 needle roller and cage thrust assemblies", "extracted_at": "2026-09-27", "last_verified": "2026-09-27", "confidence_score": 0.7, "status": "published", "aliases": [ "AXK1226", "AXK 1226" ], "locale_variants": {} }, { "sku": "AXK1528", "brand": "SKF", "manufacturer_designation": "AXK 1528", "series": "AXK-series", "type": "needle_roller_thrust", "d_mm": 15, "D_mm": 28, "B_mm": 2, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 10.4, "static_load_kN": 37.5, "fatigue_load_limit_kN": 4.3, "reference_speed_rpm": 4800, "limiting_speed_rpm": 9500, "max_rpm": 9500, "weight_g": 4, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 3031", "naming_rule_text": "The AXK assembly AXK 1528 covers 15–28 mm in a 2 mm section and is rated 10.4 kN dynamic / 37.5 kN static: the thinnest rolling thrust support available for that seat. In AXK 1528 the number is the boundary plan, not a bore code: 15/28, with the 2 mm assembly thickness fixed by the ISO 3031 plan and Ea/Eb 17/27 mm marking the actual needle-contact band. The thin section tolerates no misalignment: keep the mating faces parallel, and use the AXW spigot-flanged execution where a one-piece, housing-centred cage-plus-washer unit simplifies assembly. Speed planning separates the 4,800 r/min thermal reference from the 9,500 r/min mechanical limiting speed. Thrust bearings govern the thermal speed of many vertical arrangements, and oil circulation raises the usable speed substantially above grease values. Mounting: harden and grind both mating faces to 58–64 HRC over the full Ea 17–Eb 27 mm band (or fit AS/LS washers), drop the 2 mm cage in flat, and never press or hammer the needle complement.", "applications": [ "torque converter and clutch release assemblies in passenger cars", "small gearbox gears that need a 2 mm thrust shim between a shaft and face", "light turntables, index plates and office-machine pivots", "two-wheeler gearbox selector and layshaft thrust faces" ], "failure_modes": [ "edge loading across the needle crowns when the mating faces are not square to the shaft", "cage wear from rollers being dragged through unloaded zones under fluctuating thrust", "grease churning and overheating when a high-speed thrust position is over-packed", "hard-particle indentation where oil or grease filtration is inadequate", "needle-row denting from a single hard particle trapped in the 2 mm section" ], "pitfalls": [ "The AXK 1528 is watchmaking-scale (2 mm thick, 4 g): handle it with tweezers, grease it onto its washer, and assume one dropped or cocked assembly is one ruined bearing.", "the 4,800 r/min reference speed is the thermal criterion under load, the 9,500 r/min limiting speed assumes hardened, ground, oiled faces; soft or dry faces drop the real ceiling drastically.", "The 10.4 kN rating is real only at 58–64 HRC face hardness; visual inspection cannot tell a 45 HRC washer from a 60 HRC one — order certified washers.", "The AXK code supplies no washers: AXK 1528 arrives as the needle cage only, and a \"bearing failure\" on hard-faced tracks is usually a missing-AS-washer failure at ordering time.", "Match washers by the exact 15–28 mm track — a washer sized to the shaft alone leaves the needles overrunning its edge, which shears the cage.", "The 10.4/37.5 kN ratings and 4 g mass are SKF catalogue values transcribed from ch. 12.1 of PUB BU/P1 17000 (PDF table page 908); mounting data — Ea/Eb raceway diameters and the minimum load factor A — appears in the running text because the structured record carries the boundary envelope only." ], "faq": [ { "q": "Does the AXK 1528 include washers?", "a": "No. AXK is the needle roller and cage thrust assembly only; hardened AS/LS washers or shaft/housing faces at 58–64 HRC, ground over the Ea 17–Eb 27 mm band, supply the two raceways." }, { "q": "How is the AXK 1528 code read?", "a": "AXK marks the needle thrust assembly and 15/28 gives the inner 15 mm and outer 28 mm track diameters directly; the assembly is 2 mm thick. TN means the polymer cage instead of stamped steel." }, { "q": "What minimum hardness do the mating faces need?", "a": "58–64 HRC with a ground raceway finish. A softer face looks fine after assembly but the needles rib and score it within weeks despite the 10.4 kN catalogue rating — order certified washers if the shaft/housing cannot be heat treated." }, { "q": "How is an AXK thrust assembly mounted?", "a": "Harden or washer-face both tracks across Ea 17–Eb 27 mm, keep faces parallel, locate the cage concentrically against a shoulder or register, grease the needles so they stay pocketed, and never press through them." } ], "cross_ref": [ { "equiv_sku": "AXK1528", "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://www.skf.com/group/products/rolling-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.1 needle roller and cage thrust assemblies", "extracted_at": "2026-09-27", "last_verified": "2026-09-27", "confidence_score": 0.7, "status": "published", "aliases": [ "AXK1528", "AXK 1528" ], "locale_variants": {} }, { "sku": "AXK1730", "brand": "SKF", "manufacturer_designation": "AXK 1730", "series": "AXK-series", "type": "needle_roller_thrust", "d_mm": 17, "D_mm": 30, "B_mm": 2, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 11, "static_load_kN": 40.5, "fatigue_load_limit_kN": 4.75, "reference_speed_rpm": 4500, "limiting_speed_rpm": 9500, "max_rpm": 9500, "weight_g": 3.65, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 3031", "naming_rule_text": "In SKF catalogue PUB BU/P1 17000, AXK 1730 denotes the needle thrust assembly whose code reads the raceway diameters directly — 17/30 — intended to run against hardened, ground washers or machine faces. Reading the code: AXK marks the needle thrust assembly and the figures 17/30 give the two raceway diameters in millimetres — 17 mm inner track and 30 mm outer track; TN swaps the stamped steel cage for PA66. Small AXK sizes are offered with the glass-fibre TN cage or the stamped steel cage; both are 2 mm-class sections. One-direction thrust only. One direction only: AXK 1730 cannot be reversed to take opposite thrust — mirror a second bearing for reversing shafts, and keep housing and shaft seats square within the ISO 104 tolerances. Grease both faces before assembly so the needles stay in their pockets, especially for the 2 mm thin set; after fitting, rotate slowly and confirm the cage does not catch on the shoulder edges.", "applications": [ "compact drives where hardened washers replace a machined raceway shoulder", "automotive manual and automatic transmission thrust positions", "torque converter and clutch release assemblies in passenger cars", "small gearbox gears that need a 2 mm thrust shim between a shaft and face" ], "failure_modes": [ "instant raceway scoring when the assembly runs against a face below 58 HRC or with a rough finish", "cage wear from rollers being dragged through unloaded zones under fluctuating thrust", "abrasive paste forming as dust bypasses the housing seals into the open washer set", "false brinelling and rust-red witness marks on standby machines under external vibration", "edge loading across the needle crowns when the mating faces are not square to the shaft" ], "pitfalls": [ "The AXK 1730 is watchmaking-scale (2 mm thick, 3.65 g): handle it with tweezers, grease it onto its washer, and assume one dropped or cocked assembly is one ruined bearing.", "The 11 kN rating is real only at 58–64 HRC face hardness; visual inspection cannot tell a 45 HRC washer from a 60 HRC one — order certified washers.", "Do not expect misalignment tolerance: a 2 mm rigid needle set edge-loads if the faces tilt even a fraction of a degree — use a spherical or AXW solution where the seat cannot be kept parallel.", "TN polymer and stamped steel cages of the same code (AXK 1730) share envelopes and ratings; the choice is temperature and noise, not load.", "The AXK code supplies no washers: AXK 1730 arrives as the needle cage only, and a \"bearing failure\" on hard-faced tracks is usually a missing-AS-washer failure at ordering time.", "The 11/40.5 kN ratings and 3.65 g mass are SKF catalogue values transcribed from ch. 12.1 of PUB BU/P1 17000 (PDF table page 908); mounting data — Ea/Eb raceway diameters and the minimum load factor A — appears in the running text because the structured record carries the boundary envelope only." ], "faq": [ { "q": "What does AXK 17/30 mean?", "a": "A needle roller and cage thrust assembly (ISO 3031) for a 17 mm inner track and 30 mm outer track, 2 mm thick; one-direction axial load, washers ordered separately." }, { "q": "What is the difference between AXK and AXW?", "a": "AXW pairs the AXK needle set with a washer carrying an integral centring spigot that locates in a housing register, keeping cage and washer concentric as one part; AXK is the bare cage-and-needle set needing two separate washers. The AXW still needs a separate LS/AS washer or hardened face on the opposite side." }, { "q": "Does the AXK 1730 tolerate misalignment?", "a": "No — the 2 mm rigid needle set edge-loads on tilted faces. Keep the shaft and housing faces parallel, or choose the self-aligning roller thrust families." }, { "q": "Why does an AXK assembly fail early?", "a": "Almost always the track: missing/undersized washers, hardness below 58 HRC, a sharp shoulder edge catching the cage, or contamination in the thin section. Rating 11 kN assumes all of these are correct." } ], "cross_ref": [ { "equiv_sku": "AXK1730", "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://www.skf.com/group/products/rolling-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.1 needle roller and cage thrust assemblies", "extracted_at": "2026-09-27", "last_verified": "2026-09-27", "confidence_score": 0.7, "status": "published", "aliases": [ "AXK1730", "AXK 1730" ], "locale_variants": {} }, { "sku": "AXK2035", "brand": "SKF", "manufacturer_designation": "AXK 2035", "series": "AXK-series", "type": "needle_roller_thrust", "d_mm": 20, "D_mm": 35, "B_mm": 2, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 12, "static_load_kN": 47.5, "fatigue_load_limit_kN": 5.6, "reference_speed_rpm": 4300, "limiting_speed_rpm": 8500, "max_rpm": 8500, "weight_g": 5, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 3031", "naming_rule_text": "For transmission gears that would otherwise rub on a housing wall, AXK 2035 supplies a complete needle thrust track between 22 and 34 mm raceway diameters in a 2 mm envelope. In AXK 2035 the number is the boundary plan, not a bore code: 20/35, with the 2 mm assembly thickness fixed by the ISO 3031 plan and Ea/Eb 22/34 mm marking the actual needle-contact band. Small AXK sizes are offered with the glass-fibre TN cage or the stamped steel cage; both are 2 mm-class sections. One-direction thrust only. Selection arithmetic: C 12 kN against C0 47.5 kN gives a C0/C ratio of 3.96 — thrust bearings are chosen on static rating and F_a/C0 more often than on L10 life. Grease both faces before assembly so the needles stay in their pockets, especially for the 2 mm thin set; after fitting, rotate slowly and confirm the cage does not catch on the shoulder edges.", "applications": [ "automotive manual and automatic transmission thrust positions", "torque converter and clutch release assemblies in passenger cars", "small gearbox gears that need a 2 mm thrust shim between a shaft and face", "light turntables, index plates and office-machine pivots" ], "failure_modes": [ "edge loading across the needle crowns when the mating faces are not square to the shaft", "smearing at roller-raceway contacts during unloaded startup before the oil film or preload is established", "oil starvation at the sliding contact zones of large spherical roller thrust bearings on forced-feed trips", "false brinelling and rust-red witness marks on standby machines under external vibration", "needle-row denting from a single hard particle trapped in the 2 mm section" ], "pitfalls": [ "The AXK 2035 is watchmaking-scale (2 mm thick, 5 g): handle it with tweezers, grease it onto its washer, and assume one dropped or cocked assembly is one ruined bearing.", "the 4,300 r/min reference speed is the thermal criterion under load, the 8,500 r/min limiting speed assumes hardened, ground, oiled faces; soft or dry faces drop the real ceiling drastically.", "The 12 kN rating is real only at 58–64 HRC face hardness; visual inspection cannot tell a 45 HRC washer from a 60 HRC one — order certified washers.", "Match washers by the exact 20–35 mm track — a washer sized to the shaft alone leaves the needles overrunning its edge, which shears the cage.", "The AXK code supplies no washers: AXK 2035 arrives as the needle cage only, and a \"bearing failure\" on hard-faced tracks is usually a missing-AS-washer failure at ordering time.", "The 12/47.5 kN ratings and 5 g mass are SKF catalogue values transcribed from ch. 12.1 of PUB BU/P1 17000 (PDF table page 908); mounting data — Ea/Eb raceway diameters and the minimum load factor A — appears in the running text because the structured record carries the boundary envelope only." ], "faq": [ { "q": "What are the dimensions and ratings of the AXK 2035?", "a": "A AXK 2035 measures 20 mm bore × 35 mm outside diameter × 2 mm width (0.787 × 1.378 × 0.079 in). From SKF catalogue PUB BU/P1 17000: dynamic C 12 kN, static C0 47.5 kN, fatigue limit Pu 5.6 kN, reference speed 4,300 r/min, limiting speed 8,500 r/min, mass about 5 g. The contact band runs Ea 22–Eb 34 mm; hardened washers or 58–64 HRC faces are required." }, { "q": "Does the AXK 2035 include washers?", "a": "No. AXK is the needle roller and cage thrust assembly only; hardened AS/LS washers or shaft/housing faces at 58–64 HRC, ground over the Ea 22–Eb 34 mm band, supply the two raceways." }, { "q": "How is the AXK 2035 code read?", "a": "AXK marks the needle thrust assembly and 20/35 gives the inner 20 mm and outer 35 mm track diameters directly; the assembly is 2 mm thick. TN means the polymer cage instead of stamped steel." }, { "q": "What minimum hardness do the mating faces need?", "a": "58–64 HRC with a ground raceway finish. A softer face looks fine after assembly but the needles rib and score it within weeks despite the 12 kN catalogue rating — order certified washers if the shaft/housing cannot be heat treated." } ], "cross_ref": [ { "equiv_sku": "AXK2035", "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://www.skf.com/group/products/rolling-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.1 needle roller and cage thrust assemblies", "extracted_at": "2026-09-27", "last_verified": "2026-09-27", "confidence_score": 0.7, "status": "published", "aliases": [ "AXK2035", "AXK 2035" ], "locale_variants": {} }, { "sku": "AXK2542", "brand": "SKF", "manufacturer_designation": "AXK 2542", "series": "AXK-series", "type": "needle_roller_thrust", "d_mm": 25, "D_mm": 42, "B_mm": 2, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 13.4, "static_load_kN": 60, "fatigue_load_limit_kN": 6.95, "reference_speed_rpm": 3800, "limiting_speed_rpm": 7500, "max_rpm": 7500, "weight_g": 7, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 3031", "naming_rule_text": "SKF's AXK 2542 is not a complete bearing — the stamped steel cage spaces the thrust needles, while hardened AS/LS raceway washers (or shaft and housing faces at 58–64 HRC) provide the two raceways. In AXK 2542 the number is the boundary plan, not a bore code: 25/42, with the 2 mm assembly thickness fixed by the ISO 3031 plan and Ea/Eb 29/41 mm marking the actual needle-contact band. The assembly itself has no rings: both raceways must be supplied as hardened washers or machine faces (58–64 HRC, ground), with the contact band covering Ea 29 to Eb 41 mm. Speed planning separates the 3,800 r/min thermal reference from the 7,500 r/min mechanical limiting speed. Thrust bearings govern the thermal speed of many vertical arrangements, and oil circulation raises the usable speed substantially above grease values. Mounting: harden and grind both mating faces to 58–64 HRC over the full Ea 29–Eb 41 mm band (or fit AS/LS washers), drop the 2 mm cage in flat, and never press or hammer the needle complement.", "applications": [ "torque converter and clutch release assemblies in passenger cars", "small gearbox gears that need a 2 mm thrust shim between a shaft and face", "light turntables, index plates and office-machine pivots", "two-wheeler gearbox selector and layshaft thrust faces" ], "failure_modes": [ "instant raceway scoring when the assembly runs against a face below 58 HRC or with a rough finish", "smearing at roller-raceway contacts during unloaded startup before the oil film or preload is established", "abrasive paste forming as dust bypasses the housing seals into the open washer set", "hard-particle indentation where oil or grease filtration is inadequate", "edge loading across the needle crowns when the mating faces are not square to the shaft" ], "pitfalls": [ "On a 25 mm shaft the cage is only 2 mm thick — a shaft shoulder with a sharp edge or a 0.1 mm burr will catch and spin the cage instead of locating it.", "The AXK code supplies no washers: AXK 2542 arrives as the needle cage only, and a \"bearing failure\" on hard-faced tracks is usually a missing-AS-washer failure at ordering time.", "Match washers by the exact 25–42 mm track — a washer sized to the shaft alone leaves the needles overrunning its edge, which shears the cage.", "Do not expect misalignment tolerance: a 2 mm rigid needle set edge-loads if the faces tilt even a fraction of a degree — use a spherical or AXW solution where the seat cannot be kept parallel.", "TN polymer and stamped steel cages of the same code (AXK 2542) share envelopes and ratings; the choice is temperature and noise, not load.", "The 13.4/60 kN ratings and 7 g mass are SKF catalogue values transcribed from ch. 12.1 of PUB BU/P1 17000 (PDF table page 908); mounting data — Ea/Eb raceway diameters and the minimum load factor A — appears in the running text because the structured record carries the boundary envelope only." ], "faq": [ { "q": "Does the AXK 2542 include washers?", "a": "No. AXK is the needle roller and cage thrust assembly only; hardened AS/LS washers or shaft/housing faces at 58–64 HRC, ground over the Ea 29–Eb 41 mm band, supply the two raceways." }, { "q": "How is the AXK 2542 code read?", "a": "AXK marks the needle thrust assembly and 25/42 gives the inner 25 mm and outer 42 mm track diameters directly; the assembly is 2 mm thick. TN means the polymer cage instead of stamped steel." }, { "q": "What minimum hardness do the mating faces need?", "a": "58–64 HRC with a ground raceway finish. A softer face looks fine after assembly but the needles rib and score it within weeks despite the 13.4 kN catalogue rating — order certified washers if the shaft/housing cannot be heat treated." }, { "q": "How is an AXK thrust assembly mounted?", "a": "Harden or washer-face both tracks across Ea 29–Eb 41 mm, keep faces parallel, locate the cage concentrically against a shoulder or register, grease the needles so they stay pocketed, and never press through them." } ], "cross_ref": [ { "equiv_sku": "AXK2542", "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://www.skf.com/group/products/rolling-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.1 needle roller and cage thrust assemblies", "extracted_at": "2026-09-27", "last_verified": "2026-09-27", "confidence_score": 0.7, "status": "published", "aliases": [ "AXK2542", "AXK 2542" ], "locale_variants": {} }, { "sku": "AXK3047", "brand": "SKF", "manufacturer_designation": "AXK 3047", "series": "AXK-series", "type": "needle_roller_thrust", "d_mm": 30, "D_mm": 47, "B_mm": 2, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 15, "static_load_kN": 72, "fatigue_load_limit_kN": 8.3, "reference_speed_rpm": 3600, "limiting_speed_rpm": 7000, "max_rpm": 7000, "weight_g": 8, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 3031", "naming_rule_text": "In SKF catalogue PUB BU/P1 17000, AXK 3047 denotes the needle thrust assembly whose code reads the raceway diameters directly — 30/47 — intended to run against hardened, ground washers or machine faces. In AXK 3047 the number is the boundary plan, not a bore code: 30/47, with the 2 mm assembly thickness fixed by the ISO 3031 plan and Ea/Eb 34/46 mm marking the actual needle-contact band. Washer selection is part of the bearing: too-soft faces rib within weeks even though the 15 kN rating is unchanged — the AXK code only supplies the rolling elements. One direction only: AXK 3047 cannot be reversed to take opposite thrust — mirror a second bearing for reversing shafts, and keep housing and shaft seats square within the ISO 104 tolerances. Mounting: harden and grind both mating faces to 58–64 HRC over the full Ea 34–Eb 46 mm band (or fit AS/LS washers), drop the 2 mm cage in flat, and never press or hammer the needle complement.", "applications": [ "compact drives where hardened washers replace a machined raceway shoulder", "automotive manual and automatic transmission thrust positions", "torque converter and clutch release assemblies in passenger cars", "small gearbox gears that need a 2 mm thrust shim between a shaft and face" ], "failure_modes": [ "edge loading across the needle crowns when the mating faces are not square to the shaft", "roller skidding and raceway glazing once the thrust falls below the catalogue minimum axial load (factor A)", "oil starvation at the sliding contact zones of large spherical roller thrust bearings on forced-feed trips", "hard-particle indentation where oil or grease filtration is inadequate", "needle-row denting from a single hard particle trapped in the 2 mm section" ], "pitfalls": [ "On a 30 mm shaft the cage is only 2 mm thick — a shaft shoulder with a sharp edge or a 0.1 mm burr will catch and spin the cage instead of locating it.", "the 3,600 r/min reference speed is the thermal criterion under load, the 7,000 r/min limiting speed assumes hardened, ground, oiled faces; soft or dry faces drop the real ceiling drastically.", "The 15 kN rating is real only at 58–64 HRC face hardness; visual inspection cannot tell a 45 HRC washer from a 60 HRC one — order certified washers.", "The AXK code supplies no washers: AXK 3047 arrives as the needle cage only, and a \"bearing failure\" on hard-faced tracks is usually a missing-AS-washer failure at ordering time.", "Match washers by the exact 30–47 mm track — a washer sized to the shaft alone leaves the needles overrunning its edge, which shears the cage.", "The 15/72 kN ratings and 8 g mass are SKF catalogue values transcribed from ch. 12.1 of PUB BU/P1 17000 (PDF table page 908); mounting data — Ea/Eb raceway diameters and the minimum load factor A — appears in the running text because the structured record carries the boundary envelope only." ], "faq": [ { "q": "What are the dimensions and ratings of the AXK 3047?", "a": "A AXK 3047 measures 30 mm bore × 47 mm outside diameter × 2 mm width (1.181 × 1.85 × 0.079 in). From SKF catalogue PUB BU/P1 17000: dynamic C 15 kN, static C0 72 kN, fatigue limit Pu 8.3 kN, reference speed 3,600 r/min, limiting speed 7,000 r/min, mass about 8 g. The contact band runs Ea 34–Eb 46 mm; hardened washers or 58–64 HRC faces are required." }, { "q": "Does the AXK 3047 include washers?", "a": "No. AXK is the needle roller and cage thrust assembly only; hardened AS/LS washers or shaft/housing faces at 58–64 HRC, ground over the Ea 34–Eb 46 mm band, supply the two raceways." }, { "q": "How is the AXK 3047 code read?", "a": "AXK marks the needle thrust assembly and 30/47 gives the inner 30 mm and outer 47 mm track diameters directly; the assembly is 2 mm thick. TN means the polymer cage instead of stamped steel." }, { "q": "What minimum hardness do the mating faces need?", "a": "58–64 HRC with a ground raceway finish. A softer face looks fine after assembly but the needles rib and score it within weeks despite the 15 kN catalogue rating — order certified washers if the shaft/housing cannot be heat treated." } ], "cross_ref": [ { "equiv_sku": "AXK3047", "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://www.skf.com/group/products/rolling-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.1 needle roller and cage thrust assemblies", "extracted_at": "2026-09-27", "last_verified": "2026-09-27", "confidence_score": 0.7, "status": "published", "aliases": [ "AXK3047", "AXK 3047" ], "locale_variants": {} }, { "sku": "AXK3552", "brand": "SKF", "manufacturer_designation": "AXK 3552", "series": "AXK-series", "type": "needle_roller_thrust", "d_mm": 35, "D_mm": 52, "B_mm": 2, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 16.6, "static_load_kN": 83, "fatigue_load_limit_kN": 9.8, "reference_speed_rpm": 3200, "limiting_speed_rpm": 6300, "max_rpm": 6300, "weight_g": 10, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 3031", "naming_rule_text": "AXK 3552 gives thrust capacity in the height of a shim: 35 mm inner track, 52 mm outer track, only 2 mm thick, with needles held by the stamped steel cage for one-direction axial load. The designation AXK 3552 identifies a 2 mm needle thrust cage for the 35–52 mm track; the same diameters select the matching hardened washers, which is the usual ordering error to avoid. Washer selection is part of the bearing: too-soft faces rib within weeks even though the 16.6 kN rating is unchanged — the AXK code only supplies the rolling elements. Selection arithmetic: C 16.6 kN against C0 83 kN gives a C0/C ratio of 5.00 — thrust bearings are chosen on static rating and F_a/C0 more often than on L10 life. Mounting: harden and grind both mating faces to 58–64 HRC over the full Ea 39–Eb 51 mm band (or fit AS/LS washers), drop the 2 mm cage in flat, and never press or hammer the needle complement.", "applications": [ "automotive manual and automatic transmission thrust positions", "torque converter and clutch release assemblies in passenger cars", "small gearbox gears that need a 2 mm thrust shim between a shaft and face", "light turntables, index plates and office-machine pivots" ], "failure_modes": [ "edge loading across the needle crowns when the mating faces are not square to the shaft", "smearing at roller-raceway contacts during unloaded startup before the oil film or preload is established", "abrasive paste forming as dust bypasses the housing seals into the open washer set", "rolling-contact fatigue spalling after the catalogue L10 life is exhausted", "needle-row denting from a single hard particle trapped in the 2 mm section" ], "pitfalls": [ "On a 35 mm shaft the cage is only 2 mm thick — a shaft shoulder with a sharp edge or a 0.1 mm burr will catch and spin the cage instead of locating it.", "the 3,200 r/min reference speed is the thermal criterion under load, the 6,300 r/min limiting speed assumes hardened, ground, oiled faces; soft or dry faces drop the real ceiling drastically.", "The 16.6 kN rating is real only at 58–64 HRC face hardness; visual inspection cannot tell a 45 HRC washer from a 60 HRC one — order certified washers.", "Match washers by the exact 35–52 mm track — a washer sized to the shaft alone leaves the needles overrunning its edge, which shears the cage.", "The AXK code supplies no washers: AXK 3552 arrives as the needle cage only, and a \"bearing failure\" on hard-faced tracks is usually a missing-AS-washer failure at ordering time.", "The 16.6/83 kN ratings and 10 g mass are SKF catalogue values transcribed from ch. 12.1 of PUB BU/P1 17000 (PDF table page 908); mounting data — Ea/Eb raceway diameters and the minimum load factor A — appears in the running text because the structured record carries the boundary envelope only." ], "faq": [ { "q": "What minimum hardness do the mating faces need?", "a": "58–64 HRC with a ground raceway finish. A softer face looks fine after assembly but the needles rib and score it within weeks despite the 16.6 kN catalogue rating — order certified washers if the shaft/housing cannot be heat treated." }, { "q": "How is an AXK thrust assembly mounted?", "a": "Harden or washer-face both tracks across Ea 39–Eb 51 mm, keep faces parallel, locate the cage concentrically against a shoulder or register, grease the needles so they stay pocketed, and never press through them." }, { "q": "What are the dimensions and ratings of the AXK 3552?", "a": "A AXK 3552 measures 35 mm bore × 52 mm outside diameter × 2 mm width (1.378 × 2.047 × 0.079 in). From SKF catalogue PUB BU/P1 17000: dynamic C 16.6 kN, static C0 83 kN, fatigue limit Pu 9.8 kN, reference speed 3,200 r/min, limiting speed 6,300 r/min, mass about 10 g. The contact band runs Ea 39–Eb 51 mm; hardened washers or 58–64 HRC faces are required." }, { "q": "Does the AXK 3552 include washers?", "a": "No. AXK is the needle roller and cage thrust assembly only; hardened AS/LS washers or shaft/housing faces at 58–64 HRC, ground over the Ea 39–Eb 51 mm band, supply the two raceways." } ], "cross_ref": [ { "equiv_sku": "AXK3552", "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://www.skf.com/group/products/rolling-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.1 needle roller and cage thrust assemblies", "extracted_at": "2026-09-27", "last_verified": "2026-09-27", "confidence_score": 0.7, "status": "published", "aliases": [ "AXK3552", "AXK 3552" ], "locale_variants": {} }, { "sku": "AXK4060", "brand": "SKF", "manufacturer_designation": "AXK 4060", "series": "AXK-series", "type": "needle_roller_thrust", "d_mm": 40, "D_mm": 60, "B_mm": 3, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 25, "static_load_kN": 114, "fatigue_load_limit_kN": 13.7, "reference_speed_rpm": 2800, "limiting_speed_rpm": 5600, "max_rpm": 5600, "weight_g": 16, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 3031", "naming_rule_text": "SKF's AXK 4060 is not a complete bearing — the stamped steel cage spaces the thrust needles, while hardened AS/LS raceway washers (or shaft and housing faces at 58–64 HRC) provide the two raceways. Reading the code: AXK marks the needle thrust assembly and the figures 40/60 give the two raceway diameters in millimetres — 40 mm inner track and 60 mm outer track; TN swaps the stamped steel cage for PA66. The thin section tolerates no misalignment: keep the mating faces parallel, and use the AXW spigot-flanged execution where a one-piece, housing-centred cage-plus-washer unit simplifies assembly. One direction only: AXK 4060 cannot be reversed to take opposite thrust — mirror a second bearing for reversing shafts, and keep housing and shaft seats square within the ISO 104 tolerances. Mounting: harden and grind both mating faces to 58–64 HRC over the full Ea 45–Eb 58 mm band (or fit AS/LS washers), drop the 3 mm cage in flat, and never press or hammer the needle complement.", "applications": [ "compact drives where hardened washers replace a machined raceway shoulder", "automotive manual and automatic transmission thrust positions", "torque converter and clutch release assemblies in passenger cars", "small gearbox gears that need a 2 mm thrust shim between a shaft and face" ], "failure_modes": [ "needle-row denting from a single hard particle trapped in the 2 mm section", "smearing at roller-raceway contacts during unloaded startup before the oil film or preload is established", "abrasive paste forming as dust bypasses the housing seals into the open washer set", "rolling-contact fatigue spalling after the catalogue L10 life is exhausted", "instant raceway scoring when the assembly runs against a face below 58 HRC or with a rough finish" ], "pitfalls": [ "On a 40 mm shaft the cage is only 3 mm thick — a shaft shoulder with a sharp edge or a 0.1 mm burr will catch and spin the cage instead of locating it.", "Match washers by the exact 40–60 mm track — a washer sized to the shaft alone leaves the needles overrunning its edge, which shears the cage.", "the 2,800 r/min reference speed is the thermal criterion under load, the 5,600 r/min limiting speed assumes hardened, ground, oiled faces; soft or dry faces drop the real ceiling drastically.", "The AXK code supplies no washers: AXK 4060 arrives as the needle cage only, and a \"bearing failure\" on hard-faced tracks is usually a missing-AS-washer failure at ordering time.", "The 25 kN rating is real only at 58–64 HRC face hardness; visual inspection cannot tell a 45 HRC washer from a 60 HRC one — order certified washers.", "The 25/114 kN ratings and 16 g mass are SKF catalogue values transcribed from ch. 12.1 of PUB BU/P1 17000 (PDF table page 908); mounting data — Ea/Eb raceway diameters and the minimum load factor A — appears in the running text because the structured record carries the boundary envelope only." ], "faq": [ { "q": "What does AXK 40/60 mean?", "a": "A needle roller and cage thrust assembly (ISO 3031) for a 40 mm inner track and 60 mm outer track, 3 mm thick; one-direction axial load, washers ordered separately." }, { "q": "What is the difference between AXK and AXW?", "a": "AXW pairs the AXK needle set with a washer carrying an integral centring spigot that locates in a housing register, keeping cage and washer concentric as one part; AXK is the bare cage-and-needle set needing two separate washers. The AXW still needs a separate LS/AS washer or hardened face on the opposite side." }, { "q": "Does the AXK 4060 tolerate misalignment?", "a": "No — the 3 mm rigid needle set edge-loads on tilted faces. Keep the shaft and housing faces parallel, or choose the self-aligning roller thrust families." }, { "q": "Why does an AXK assembly fail early?", "a": "Almost always the track: missing/undersized washers, hardness below 58 HRC, a sharp shoulder edge catching the cage, or contamination in the thin section. Rating 25 kN assumes all of these are correct." } ], "cross_ref": [ { "equiv_sku": "AXK4060", "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://www.skf.com/group/products/rolling-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.1 needle roller and cage thrust assemblies", "extracted_at": "2026-09-27", "last_verified": "2026-09-27", "confidence_score": 0.7, "status": "published", "aliases": [ "AXK4060", "AXK 4060" ], "locale_variants": {} }, { "sku": "AXK4565", "brand": "SKF", "manufacturer_designation": "AXK 4565", "series": "AXK-series", "type": "needle_roller_thrust", "d_mm": 45, "D_mm": 65, "B_mm": 3, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 27, "static_load_kN": 127, "fatigue_load_limit_kN": 15.3, "reference_speed_rpm": 2600, "limiting_speed_rpm": 5300, "max_rpm": 5300, "weight_g": 18, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 3031", "naming_rule_text": "In SKF catalogue PUB BU/P1 17000, AXK 4565 denotes the needle thrust assembly whose code reads the raceway diameters directly — 45/65 — intended to run against hardened, ground washers or machine faces. Reading the code: AXK marks the needle thrust assembly and the figures 45/65 give the two raceway diameters in millimetres — 45 mm inner track and 65 mm outer track; TN swaps the stamped steel cage for PA66. Washer selection is part of the bearing: too-soft faces rib within weeks even though the 27 kN rating is unchanged — the AXK code only supplies the rolling elements. Static safety matters for shock duty: compare peak axial force against C0 127 kN with the application's static factor, since crane hooks and screw positions see their worst load at zero or low speed. Mounting: harden and grind both mating faces to 58–64 HRC over the full Ea 50–Eb 63 mm band (or fit AS/LS washers), drop the 3 mm cage in flat, and never press or hammer the needle complement.", "applications": [ "two-wheeler gearbox selector and layshaft thrust faces", "compact drives where hardened washers replace a machined raceway shoulder", "automotive manual and automatic transmission thrust positions", "torque converter and clutch release assemblies in passenger cars" ], "failure_modes": [ "needle-row denting from a single hard particle trapped in the 2 mm section", "roller skidding and raceway glazing once the thrust falls below the catalogue minimum axial load (factor A)", "oil starvation at the sliding contact zones of large spherical roller thrust bearings on forced-feed trips", "hard-particle indentation where oil or grease filtration is inadequate", "instant raceway scoring when the assembly runs against a face below 58 HRC or with a rough finish" ], "pitfalls": [ "On a 45 mm shaft the cage is only 3 mm thick — a shaft shoulder with a sharp edge or a 0.1 mm burr will catch and spin the cage instead of locating it.", "Match washers by the exact 45–65 mm track — a washer sized to the shaft alone leaves the needles overrunning its edge, which shears the cage.", "the 2,600 r/min reference speed is the thermal criterion under load, the 5,300 r/min limiting speed assumes hardened, ground, oiled faces; soft or dry faces drop the real ceiling drastically.", "The AXK code supplies no washers: AXK 4565 arrives as the needle cage only, and a \"bearing failure\" on hard-faced tracks is usually a missing-AS-washer failure at ordering time.", "The 27 kN rating is real only at 58–64 HRC face hardness; visual inspection cannot tell a 45 HRC washer from a 60 HRC one — order certified washers.", "The 27/127 kN ratings and 18 g mass are SKF catalogue values transcribed from ch. 12.1 of PUB BU/P1 17000 (PDF table page 908); mounting data — Ea/Eb raceway diameters and the minimum load factor A — appears in the running text because the structured record carries the boundary envelope only." ], "faq": [ { "q": "What does AXK 45/65 mean?", "a": "A needle roller and cage thrust assembly (ISO 3031) for a 45 mm inner track and 65 mm outer track, 3 mm thick; one-direction axial load, washers ordered separately." }, { "q": "What is the difference between AXK and AXW?", "a": "AXW pairs the AXK needle set with a washer carrying an integral centring spigot that locates in a housing register, keeping cage and washer concentric as one part; AXK is the bare cage-and-needle set needing two separate washers. The AXW still needs a separate LS/AS washer or hardened face on the opposite side." }, { "q": "Does the AXK 4565 tolerate misalignment?", "a": "No — the 3 mm rigid needle set edge-loads on tilted faces. Keep the shaft and housing faces parallel, or choose the self-aligning roller thrust families." }, { "q": "Why does an AXK assembly fail early?", "a": "Almost always the track: missing/undersized washers, hardness below 58 HRC, a sharp shoulder edge catching the cage, or contamination in the thin section. Rating 27 kN assumes all of these are correct." } ], "cross_ref": [ { "equiv_sku": "AXK4565", "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://www.skf.com/group/products/rolling-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.1 needle roller and cage thrust assemblies", "extracted_at": "2026-09-27", "last_verified": "2026-09-27", "confidence_score": 0.7, "status": "published", "aliases": [ "AXK4565", "AXK 4565" ], "locale_variants": {} }, { "sku": "AXK5070", "brand": "SKF", "manufacturer_designation": "AXK 5070", "series": "AXK-series", "type": "needle_roller_thrust", "d_mm": 50, "D_mm": 70, "B_mm": 3, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 28.5, "static_load_kN": 143, "fatigue_load_limit_kN": 17, "reference_speed_rpm": 2400, "limiting_speed_rpm": 5000, "max_rpm": 5000, "weight_g": 20, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 3031", "naming_rule_text": "AXK 5070 gives thrust capacity in the height of a shim: 50 mm inner track, 70 mm outer track, only 3 mm thick, with needles held by the stamped steel cage for one-direction axial load. SKF prints the AXK sizes as adjacent figures, so 50/70 reads 50 then 70 mm; the assembly has no washers of its own — order AS/LS washers or harden the mating faces. The assembly itself has no rings: both raceways must be supplied as hardened washers or machine faces (58–64 HRC, ground), with the contact band covering Ea 55 to Eb 68 mm. The 20 g mass and 3 mm axial height sit between 50 and 70 mm washer diameters; check the seat shoulder spans the full ring face — a narrow shoulder causes washer fretting long before fatigue does. Grease both faces before assembly so the needles stay in their pockets, especially for the 3 mm thin set; after fitting, rotate slowly and confirm the cage does not catch on the shoulder edges.", "applications": [ "light turntables, index plates and office-machine pivots", "two-wheeler gearbox selector and layshaft thrust faces", "compact drives where hardened washers replace a machined raceway shoulder", "automotive manual and automatic transmission thrust positions" ], "failure_modes": [ "instant raceway scoring when the assembly runs against a face below 58 HRC or with a rough finish", "roller skidding and raceway glazing once the thrust falls below the catalogue minimum axial load (factor A)", "grease churning and overheating when a high-speed thrust position is over-packed", "false brinelling and rust-red witness marks on standby machines under external vibration", "edge loading across the needle crowns when the mating faces are not square to the shaft" ], "pitfalls": [ "On a 50 mm shaft the cage is only 3 mm thick — a shaft shoulder with a sharp edge or a 0.1 mm burr will catch and spin the cage instead of locating it.", "The 28.5 kN rating is real only at 58–64 HRC face hardness; visual inspection cannot tell a 45 HRC washer from a 60 HRC one — order certified washers.", "Do not expect misalignment tolerance: a 3 mm rigid needle set edge-loads if the faces tilt even a fraction of a degree — use a spherical or AXW solution where the seat cannot be kept parallel.", "The AXK code supplies no washers: AXK 5070 arrives as the needle cage only, and a \"bearing failure\" on hard-faced tracks is usually a missing-AS-washer failure at ordering time.", "Match washers by the exact 50–70 mm track — a washer sized to the shaft alone leaves the needles overrunning its edge, which shears the cage.", "The 28.5/143 kN ratings and 20 g mass are SKF catalogue values transcribed from ch. 12.1 of PUB BU/P1 17000 (PDF table page 908); mounting data — Ea/Eb raceway diameters and the minimum load factor A — appears in the running text because the structured record carries the boundary envelope only." ], "faq": [ { "q": "What is the difference between AXK and AXW?", "a": "AXW pairs the AXK needle set with a washer carrying an integral centring spigot that locates in a housing register, keeping cage and washer concentric as one part; AXK is the bare cage-and-needle set needing two separate washers. The AXW still needs a separate LS/AS washer or hardened face on the opposite side." }, { "q": "Does the AXK 5070 tolerate misalignment?", "a": "No — the 3 mm rigid needle set edge-loads on tilted faces. Keep the shaft and housing faces parallel, or choose the self-aligning roller thrust families." }, { "q": "Why does an AXK assembly fail early?", "a": "Almost always the track: missing/undersized washers, hardness below 58 HRC, a sharp shoulder edge catching the cage, or contamination in the thin section. Rating 28.5 kN assumes all of these are correct." }, { "q": "Which dimensions does the AXK 5070 have?", "a": "A AXK 5070 measures 50 mm bore × 70 mm outside diameter × 3 mm width (1.969 × 2.756 × 0.118 in). From SKF catalogue PUB BU/P1 17000: dynamic C 28.5 kN, static C0 143 kN, fatigue limit Pu 17 kN, reference speed 2,400 r/min, limiting speed 5,000 r/min, mass about 20 g. The contact band runs Ea 55–Eb 68 mm; hardened washers or 58–64 HRC faces are required." } ], "cross_ref": [ { "equiv_sku": "AXK5070", "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://www.skf.com/group/products/rolling-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.1 needle roller and cage thrust assemblies", "extracted_at": "2026-09-27", "last_verified": "2026-09-27", "confidence_score": 0.7, "status": "published", "aliases": [ "AXK5070", "AXK 5070" ], "locale_variants": {} }, { "sku": "AXK5578", "brand": "SKF", "manufacturer_designation": "AXK 5578", "series": "AXK-series", "type": "needle_roller_thrust", "d_mm": 55, "D_mm": 78, "B_mm": 3, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 34.5, "static_load_kN": 186, "fatigue_load_limit_kN": 22.4, "reference_speed_rpm": 2200, "limiting_speed_rpm": 4300, "max_rpm": 4300, "weight_g": 28, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 3031", "naming_rule_text": "The AXK assembly AXK 5578 covers 55–78 mm in a 3 mm section and is rated 34.5 kN dynamic / 186 kN static: the thinnest rolling thrust support available for that seat. Reading the code: AXK marks the needle thrust assembly and the figures 55/78 give the two raceway diameters in millimetres — 55 mm inner track and 78 mm outer track; TN swaps the stamped steel cage for PA66. The thin section tolerates no misalignment: keep the mating faces parallel, and use the AXW spigot-flanged execution where a one-piece, housing-centred cage-plus-washer unit simplifies assembly. Static safety matters for shock duty: compare peak axial force against C0 186 kN with the application's static factor, since crane hooks and screw positions see their worst load at zero or low speed. Keep the assembly concentric with a shaft shoulder or the housing register — a needle set walking radially off its track is the most common failure; the AXW flanged version removes this risk entirely.", "applications": [ "two-wheeler gearbox selector and layshaft thrust faces", "compact drives where hardened washers replace a machined raceway shoulder", "automotive manual and automatic transmission thrust positions", "torque converter and clutch release assemblies in passenger cars" ], "failure_modes": [ "needle-row denting from a single hard particle trapped in the 2 mm section", "roller skidding and raceway glazing once the thrust falls below the catalogue minimum axial load (factor A)", "abrasive paste forming as dust bypasses the housing seals into the open washer set", "brinelling of washer raceways from impact or mounting force applied through the rolling elements", "instant raceway scoring when the assembly runs against a face below 58 HRC or with a rough finish" ], "pitfalls": [ "On a 55 mm shaft the cage is only 3 mm thick — a shaft shoulder with a sharp edge or a 0.1 mm burr will catch and spin the cage instead of locating it.", "Match washers by the exact 55–78 mm track — a washer sized to the shaft alone leaves the needles overrunning its edge, which shears the cage.", "the 2,200 r/min reference speed is the thermal criterion under load, the 4,300 r/min limiting speed assumes hardened, ground, oiled faces; soft or dry faces drop the real ceiling drastically.", "The AXK code supplies no washers: AXK 5578 arrives as the needle cage only, and a \"bearing failure\" on hard-faced tracks is usually a missing-AS-washer failure at ordering time.", "The 34.5 kN rating is real only at 58–64 HRC face hardness; visual inspection cannot tell a 45 HRC washer from a 60 HRC one — order certified washers.", "The 34.5/186 kN ratings and 28 g mass are SKF catalogue values transcribed from ch. 12.1 of PUB BU/P1 17000 (PDF table page 908); mounting data — Ea/Eb raceway diameters and the minimum load factor A — appears in the running text because the structured record carries the boundary envelope only." ], "faq": [ { "q": "Which dimensions does the AXK 5578 have?", "a": "A AXK 5578 measures 55 mm bore × 78 mm outside diameter × 3 mm width (2.165 × 3.071 × 0.118 in). From SKF catalogue PUB BU/P1 17000: dynamic C 34.5 kN, static C0 186 kN, fatigue limit Pu 22.4 kN, reference speed 2,200 r/min, limiting speed 4,300 r/min, mass about 28 g. The contact band runs Ea 60–Eb 76 mm; hardened washers or 58–64 HRC faces are required." }, { "q": "What does AXK 55/78 mean?", "a": "A needle roller and cage thrust assembly (ISO 3031) for a 55 mm inner track and 78 mm outer track, 3 mm thick; one-direction axial load, washers ordered separately." }, { "q": "What is the difference between AXK and AXW?", "a": "AXW pairs the AXK needle set with a washer carrying an integral centring spigot that locates in a housing register, keeping cage and washer concentric as one part; AXK is the bare cage-and-needle set needing two separate washers. The AXW still needs a separate LS/AS washer or hardened face on the opposite side." }, { "q": "Does the AXK 5578 tolerate misalignment?", "a": "No — the 3 mm rigid needle set edge-loads on tilted faces. Keep the shaft and housing faces parallel, or choose the self-aligning roller thrust families." } ], "cross_ref": [ { "equiv_sku": "AXK5578", "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://www.skf.com/group/products/rolling-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.1 needle roller and cage thrust assemblies", "extracted_at": "2026-09-27", "last_verified": "2026-09-27", "confidence_score": 0.7, "status": "published", "aliases": [ "AXK5578", "AXK 5578" ], "locale_variants": {} }, { "sku": "AXK6085", "brand": "SKF", "manufacturer_designation": "AXK 6085", "series": "AXK-series", "type": "needle_roller_thrust", "d_mm": 60, "D_mm": 85, "B_mm": 3, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 37.5, "static_load_kN": 232, "fatigue_load_limit_kN": 28.5, "reference_speed_rpm": 2200, "limiting_speed_rpm": 4300, "max_rpm": 4300, "weight_g": 33, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 3031", "naming_rule_text": "For transmission gears that would otherwise rub on a housing wall, AXK 6085 supplies a complete needle thrust track between 65 and 83 mm raceway diameters in a 3 mm envelope. Reading the code: AXK marks the needle thrust assembly and the figures 60/85 give the two raceway diameters in millimetres — 60 mm inner track and 85 mm outer track; TN swaps the stamped steel cage for PA66. At this size the stamped steel cage guides long thrust needles; the TN polymer-cage variant is offered where noise matters. One-direction thrust only. The 33 g mass and 3 mm axial height sit between 60 and 85 mm washer diameters; check the seat shoulder spans the full ring face — a narrow shoulder causes washer fretting long before fatigue does. Mounting: harden and grind both mating faces to 58–64 HRC over the full Ea 65–Eb 83 mm band (or fit AS/LS washers), drop the 3 mm cage in flat, and never press or hammer the needle complement.", "applications": [ "light turntables, index plates and office-machine pivots", "two-wheeler gearbox selector and layshaft thrust faces", "compact drives where hardened washers replace a machined raceway shoulder", "automotive manual and automatic transmission thrust positions" ], "failure_modes": [ "needle-row denting from a single hard particle trapped in the 2 mm section", "cage wear from rollers being dragged through unloaded zones under fluctuating thrust", "grease churning and overheating when a high-speed thrust position is over-packed", "rolling-contact fatigue spalling after the catalogue L10 life is exhausted", "instant raceway scoring when the assembly runs against a face below 58 HRC or with a rough finish" ], "pitfalls": [ "On a 60 mm shaft the cage is only 3 mm thick — a shaft shoulder with a sharp edge or a 0.1 mm burr will catch and spin the cage instead of locating it.", "Match washers by the exact 60–85 mm track — a washer sized to the shaft alone leaves the needles overrunning its edge, which shears the cage.", "the 2,200 r/min reference speed is the thermal criterion under load, the 4,300 r/min limiting speed assumes hardened, ground, oiled faces; soft or dry faces drop the real ceiling drastically.", "TN polymer and stamped steel cages of the same code (AXK 6085) share envelopes and ratings; the choice is temperature and noise, not load.", "The AXK code supplies no washers: AXK 6085 arrives as the needle cage only, and a \"bearing failure\" on hard-faced tracks is usually a missing-AS-washer failure at ordering time.", "The 37.5/232 kN ratings and 33 g mass are SKF catalogue values transcribed from ch. 12.1 of PUB BU/P1 17000 (PDF table page 908); mounting data — Ea/Eb raceway diameters and the minimum load factor A — appears in the running text because the structured record carries the boundary envelope only." ], "faq": [ { "q": "Why does an AXK assembly fail early?", "a": "Almost always the track: missing/undersized washers, hardness below 58 HRC, a sharp shoulder edge catching the cage, or contamination in the thin section. Rating 37.5 kN assumes all of these are correct." }, { "q": "Which dimensions does the AXK 6085 have?", "a": "A AXK 6085 measures 60 mm bore × 85 mm outside diameter × 3 mm width (2.362 × 3.346 × 0.118 in). From SKF catalogue PUB BU/P1 17000: dynamic C 37.5 kN, static C0 232 kN, fatigue limit Pu 28.5 kN, reference speed 2,200 r/min, limiting speed 4,300 r/min, mass about 33 g. The contact band runs Ea 65–Eb 83 mm; hardened washers or 58–64 HRC faces are required." }, { "q": "What does AXK 60/85 mean?", "a": "A needle roller and cage thrust assembly (ISO 3031) for a 60 mm inner track and 85 mm outer track, 3 mm thick; one-direction axial load, washers ordered separately." }, { "q": "What is the difference between AXK and AXW?", "a": "AXW pairs the AXK needle set with a washer carrying an integral centring spigot that locates in a housing register, keeping cage and washer concentric as one part; AXK is the bare cage-and-needle set needing two separate washers. The AXW still needs a separate LS/AS washer or hardened face on the opposite side." } ], "cross_ref": [ { "equiv_sku": "AXK6085", "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://www.skf.com/group/products/rolling-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.1 needle roller and cage thrust assemblies", "extracted_at": "2026-09-27", "last_verified": "2026-09-27", "confidence_score": 0.7, "status": "published", "aliases": [ "AXK6085", "AXK 6085" ], "locale_variants": {} }, { "sku": "AXK6590", "brand": "SKF", "manufacturer_designation": "AXK 6590", "series": "AXK-series", "type": "needle_roller_thrust", "d_mm": 65, "D_mm": 90, "B_mm": 3, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 39, "static_load_kN": 255, "fatigue_load_limit_kN": 31, "reference_speed_rpm": 2000, "limiting_speed_rpm": 4000, "max_rpm": 4000, "weight_g": 35, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 3031", "naming_rule_text": "AXK 6590 is a needle roller and cage thrust assembly to ISO 3031: a 3 mm thin cage packing the maximum number of small needles for a 65 mm shaft raceway and 90 mm outside track, as listed in SKF catalogue PUB BU/P1 17000 ch. 12.1. The designation AXK 6590 identifies a 3 mm needle thrust cage for the 65–90 mm track; the same diameters select the matching hardened washers, which is the usual ordering error to avoid. At this size the stamped steel cage guides long thrust needles; the TN polymer-cage variant is offered where noise matters. One-direction thrust only. The 35 g mass and 3 mm axial height sit between 65 and 90 mm washer diameters; check the seat shoulder spans the full ring face — a narrow shoulder causes washer fretting long before fatigue does. Mounting: harden and grind both mating faces to 58–64 HRC over the full Ea 70–Eb 88 mm band (or fit AS/LS washers), drop the 3 mm cage in flat, and never press or hammer the needle complement.", "applications": [ "light turntables, index plates and office-machine pivots", "two-wheeler gearbox selector and layshaft thrust faces", "compact drives where hardened washers replace a machined raceway shoulder", "automotive manual and automatic transmission thrust positions" ], "failure_modes": [ "instant raceway scoring when the assembly runs against a face below 58 HRC or with a rough finish", "roller skidding and raceway glazing once the thrust falls below the catalogue minimum axial load (factor A)", "oil starvation at the sliding contact zones of large spherical roller thrust bearings on forced-feed trips", "hard-particle indentation where oil or grease filtration is inadequate", "edge loading across the needle crowns when the mating faces are not square to the shaft" ], "pitfalls": [ "At 65 mm track diameter, face hardness decides everything: a ground-but-soft washer looks correct yet ribbons within months; specify 58–64 HRC on the drawing.", "The AXK code supplies no washers: AXK 6590 arrives as the needle cage only, and a \"bearing failure\" on hard-faced tracks is usually a missing-AS-washer failure at ordering time.", "Match washers by the exact 65–90 mm track — a washer sized to the shaft alone leaves the needles overrunning its edge, which shears the cage.", "the 2,000 r/min reference speed is the thermal criterion under load, the 4,000 r/min limiting speed assumes hardened, ground, oiled faces; soft or dry faces drop the real ceiling drastically.", "The 39 kN rating is real only at 58–64 HRC face hardness; visual inspection cannot tell a 45 HRC washer from a 60 HRC one — order certified washers.", "The 39/255 kN ratings and 35 g mass are SKF catalogue values transcribed from ch. 12.1 of PUB BU/P1 17000 (PDF table page 908); mounting data — Ea/Eb raceway diameters and the minimum load factor A — appears in the running text because the structured record carries the boundary envelope only." ], "faq": [ { "q": "How is the AXK 6590 code read?", "a": "AXK marks the needle thrust assembly and 65/90 gives the inner 65 mm and outer 90 mm track diameters directly; the assembly is 3 mm thick. TN means the polymer cage instead of stamped steel." }, { "q": "What minimum hardness do the mating faces need?", "a": "58–64 HRC with a ground raceway finish. A softer face looks fine after assembly but the needles rib and score it within weeks despite the 39 kN catalogue rating — order certified washers if the shaft/housing cannot be heat treated." }, { "q": "How is an AXK thrust assembly mounted?", "a": "Harden or washer-face both tracks across Ea 70–Eb 88 mm, keep faces parallel, locate the cage concentrically against a shoulder or register, grease the needles so they stay pocketed, and never press through them." }, { "q": "What are the dimensions and ratings of the AXK 6590?", "a": "A AXK 6590 measures 65 mm bore × 90 mm outside diameter × 3 mm width (2.559 × 3.543 × 0.118 in). From SKF catalogue PUB BU/P1 17000: dynamic C 39 kN, static C0 255 kN, fatigue limit Pu 31 kN, reference speed 2,000 r/min, limiting speed 4,000 r/min, mass about 35 g. The contact band runs Ea 70–Eb 88 mm; hardened washers or 58–64 HRC faces are required." } ], "cross_ref": [ { "equiv_sku": "AXK6590", "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://www.skf.com/group/products/rolling-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.1 needle roller and cage thrust assemblies", "extracted_at": "2026-09-27", "last_verified": "2026-09-27", "confidence_score": 0.7, "status": "published", "aliases": [ "AXK6590", "AXK 6590" ], "locale_variants": {} }, { "sku": "AXK7095", "brand": "SKF", "manufacturer_designation": "AXK 7095", "series": "AXK-series", "type": "needle_roller_thrust", "d_mm": 70, "D_mm": 95, "B_mm": 4, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 49, "static_load_kN": 255, "fatigue_load_limit_kN": 31, "reference_speed_rpm": 1800, "limiting_speed_rpm": 3600, "max_rpm": 3600, "weight_g": 60, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 3031", "naming_rule_text": "The AXK assembly AXK 7095 covers 70–95 mm in a 4 mm section and is rated 49 kN dynamic / 255 kN static: the thinnest rolling thrust support available for that seat. SKF prints the AXK sizes as adjacent figures, so 70/95 reads 70 then 95 mm; the assembly has no washers of its own — order AS/LS washers or harden the mating faces. The thin section tolerates no misalignment: keep the mating faces parallel, and use the AXW spigot-flanged execution where a one-piece, housing-centred cage-plus-washer unit simplifies assembly. No factor A is published for needle thrust sets: keep a light preload so the needles roll rather than skid — springs, shim preload or the gear's own backlash take-up are part of the selection, not an accessory. Mounting: harden and grind both mating faces to 58–64 HRC over the full Ea 74–Eb 93 mm band (or fit AS/LS washers), drop the 4 mm cage in flat, and never press or hammer the needle complement.", "applications": [ "small gearbox gears that need a 2 mm thrust shim between a shaft and face", "light turntables, index plates and office-machine pivots", "two-wheeler gearbox selector and layshaft thrust faces", "compact drives where hardened washers replace a machined raceway shoulder" ], "failure_modes": [ "instant raceway scoring when the assembly runs against a face below 58 HRC or with a rough finish", "cage wear from rollers being dragged through unloaded zones under fluctuating thrust", "grease churning and overheating when a high-speed thrust position is over-packed", "hard-particle indentation where oil or grease filtration is inadequate", "edge loading across the needle crowns when the mating faces are not square to the shaft" ], "pitfalls": [ "At 70 mm track diameter, face hardness decides everything: a ground-but-soft washer looks correct yet ribbons within months; specify 58–64 HRC on the drawing.", "The 49 kN rating is real only at 58–64 HRC face hardness; visual inspection cannot tell a 45 HRC washer from a 60 HRC one — order certified washers.", "Do not expect misalignment tolerance: a 4 mm rigid needle set edge-loads if the faces tilt even a fraction of a degree — use a spherical or AXW solution where the seat cannot be kept parallel.", "the 1,800 r/min reference speed is the thermal criterion under load, the 3,600 r/min limiting speed assumes hardened, ground, oiled faces; soft or dry faces drop the real ceiling drastically.", "The AXK code supplies no washers: AXK 7095 arrives as the needle cage only, and a \"bearing failure\" on hard-faced tracks is usually a missing-AS-washer failure at ordering time.", "The 49/255 kN ratings and 60 g mass are SKF catalogue values transcribed from ch. 12.1 of PUB BU/P1 17000 (PDF table page 908); mounting data — Ea/Eb raceway diameters and the minimum load factor A — appears in the running text because the structured record carries the boundary envelope only." ], "faq": [ { "q": "What does AXK 70/95 mean?", "a": "A needle roller and cage thrust assembly (ISO 3031) for a 70 mm inner track and 95 mm outer track, 4 mm thick; one-direction axial load, washers ordered separately." }, { "q": "What is the difference between AXK and AXW?", "a": "AXW pairs the AXK needle set with a washer carrying an integral centring spigot that locates in a housing register, keeping cage and washer concentric as one part; AXK is the bare cage-and-needle set needing two separate washers. The AXW still needs a separate LS/AS washer or hardened face on the opposite side." }, { "q": "Does the AXK 7095 tolerate misalignment?", "a": "No — the 4 mm rigid needle set edge-loads on tilted faces. Keep the shaft and housing faces parallel, or choose the self-aligning roller thrust families." }, { "q": "Why does an AXK assembly fail early?", "a": "Almost always the track: missing/undersized washers, hardness below 58 HRC, a sharp shoulder edge catching the cage, or contamination in the thin section. Rating 49 kN assumes all of these are correct." } ], "cross_ref": [ { "equiv_sku": "AXK7095", "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://www.skf.com/group/products/rolling-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.1 needle roller and cage thrust assemblies", "extracted_at": "2026-09-27", "last_verified": "2026-09-27", "confidence_score": 0.7, "status": "published", "aliases": [ "AXK7095", "AXK 7095" ], "locale_variants": {} }, { "sku": "AXK75100", "brand": "SKF", "manufacturer_designation": "AXK 75100", "series": "AXK-series", "type": "needle_roller_thrust", "d_mm": 75, "D_mm": 100, "B_mm": 4, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 50, "static_load_kN": 265, "fatigue_load_limit_kN": 32.5, "reference_speed_rpm": 1700, "limiting_speed_rpm": 3400, "max_rpm": 3400, "weight_g": 61, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 3031", "naming_rule_text": "In SKF catalogue PUB BU/P1 17000, AXK 75100 denotes the needle thrust assembly whose code reads the raceway diameters directly — 75/100 — intended to run against hardened, ground washers or machine faces. Reading the code: AXK marks the needle thrust assembly and the figures 75/100 give the two raceway diameters in millimetres — 75 mm inner track and 100 mm outer track; TN swaps the stamped steel cage for PA66. The thin section tolerates no misalignment: keep the mating faces parallel, and use the AXW spigot-flanged execution where a one-piece, housing-centred cage-plus-washer unit simplifies assembly. Speed planning separates the 1,700 r/min thermal reference from the 3,400 r/min mechanical limiting speed. Thrust bearings govern the thermal speed of many vertical arrangements, and oil circulation raises the usable speed substantially above grease values. Keep the assembly concentric with a shaft shoulder or the housing register — a needle set walking radially off its track is the most common failure; the AXW flanged version removes this risk entirely.", "applications": [ "torque converter and clutch release assemblies in passenger cars", "small gearbox gears that need a 2 mm thrust shim between a shaft and face", "light turntables, index plates and office-machine pivots", "two-wheeler gearbox selector and layshaft thrust faces" ], "failure_modes": [ "instant raceway scoring when the assembly runs against a face below 58 HRC or with a rough finish", "smearing at roller-raceway contacts during unloaded startup before the oil film or preload is established", "grease churning and overheating when a high-speed thrust position is over-packed", "electrical erosion of raceways on VFD-driven shafts without grounding or insulation", "edge loading across the needle crowns when the mating faces are not square to the shaft" ], "pitfalls": [ "At 75 mm track diameter, face hardness decides everything: a ground-but-soft washer looks correct yet ribbons within months; specify 58–64 HRC on the drawing.", "The 50 kN rating is real only at 58–64 HRC face hardness; visual inspection cannot tell a 45 HRC washer from a 60 HRC one — order certified washers.", "Do not expect misalignment tolerance: a 4 mm rigid needle set edge-loads if the faces tilt even a fraction of a degree — use a spherical or AXW solution where the seat cannot be kept parallel.", "Match washers by the exact 75–100 mm track — a washer sized to the shaft alone leaves the needles overrunning its edge, which shears the cage.", "the 1,700 r/min reference speed is the thermal criterion under load, the 3,400 r/min limiting speed assumes hardened, ground, oiled faces; soft or dry faces drop the real ceiling drastically.", "The 50/265 kN ratings and 61 g mass are SKF catalogue values transcribed from ch. 12.1 of PUB BU/P1 17000 (PDF table page 908); mounting data — Ea/Eb raceway diameters and the minimum load factor A — appears in the running text because the structured record carries the boundary envelope only." ], "faq": [ { "q": "What is the difference between AXK and AXW?", "a": "AXW pairs the AXK needle set with a washer carrying an integral centring spigot that locates in a housing register, keeping cage and washer concentric as one part; AXK is the bare cage-and-needle set needing two separate washers. The AXW still needs a separate LS/AS washer or hardened face on the opposite side." }, { "q": "Does the AXK 75100 tolerate misalignment?", "a": "No — the 4 mm rigid needle set edge-loads on tilted faces. Keep the shaft and housing faces parallel, or choose the self-aligning roller thrust families." }, { "q": "Why does an AXK assembly fail early?", "a": "Almost always the track: missing/undersized washers, hardness below 58 HRC, a sharp shoulder edge catching the cage, or contamination in the thin section. Rating 50 kN assumes all of these are correct." }, { "q": "Which dimensions does the AXK 75100 have?", "a": "A AXK 75100 measures 75 mm bore × 100 mm outside diameter × 4 mm width (2.953 × 3.937 × 0.157 in). From SKF catalogue PUB BU/P1 17000: dynamic C 50 kN, static C0 265 kN, fatigue limit Pu 32.5 kN, reference speed 1,700 r/min, limiting speed 3,400 r/min, mass about 61 g. The contact band runs Ea 79–Eb 98 mm; hardened washers or 58–64 HRC faces are required." } ], "cross_ref": [ { "equiv_sku": "AXK75100", "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://www.skf.com/group/products/rolling-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.1 needle roller and cage thrust assemblies", "extracted_at": "2026-09-27", "last_verified": "2026-09-27", "confidence_score": 0.7, "status": "published", "aliases": [ "AXK75100", "AXK 75100" ], "locale_variants": {} }, { "sku": "AXK80105", "brand": "SKF", "manufacturer_designation": "AXK 80105", "series": "AXK-series", "type": "needle_roller_thrust", "d_mm": 80, "D_mm": 105, "B_mm": 4, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 51, "static_load_kN": 280, "fatigue_load_limit_kN": 34, "reference_speed_rpm": 1700, "limiting_speed_rpm": 3400, "max_rpm": 3400, "weight_g": 63, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 3031", "naming_rule_text": "AXK 80105 gives thrust capacity in the height of a shim: 80 mm inner track, 105 mm outer track, only 4 mm thick, with needles held by the stamped steel cage for one-direction axial load. In AXK 80105 the number is the boundary plan, not a bore code: 80/105, with the 4 mm assembly thickness fixed by the ISO 3031 plan and Ea/Eb 84/103 mm marking the actual needle-contact band. The thin section tolerates no misalignment: keep the mating faces parallel, and use the AXW spigot-flanged execution where a one-piece, housing-centred cage-plus-washer unit simplifies assembly. The 63 g mass and 4 mm axial height sit between 80 and 105 mm washer diameters; check the seat shoulder spans the full ring face — a narrow shoulder causes washer fretting long before fatigue does. Mounting: harden and grind both mating faces to 58–64 HRC over the full Ea 84–Eb 103 mm band (or fit AS/LS washers), drop the 4 mm cage in flat, and never press or hammer the needle complement.", "applications": [ "light turntables, index plates and office-machine pivots", "two-wheeler gearbox selector and layshaft thrust faces", "compact drives where hardened washers replace a machined raceway shoulder", "automotive manual and automatic transmission thrust positions" ], "failure_modes": [ "edge loading across the needle crowns when the mating faces are not square to the shaft", "smearing at roller-raceway contacts during unloaded startup before the oil film or preload is established", "abrasive paste forming as dust bypasses the housing seals into the open washer set", "hard-particle indentation where oil or grease filtration is inadequate", "needle-row denting from a single hard particle trapped in the 2 mm section" ], "pitfalls": [ "At 80 mm track diameter, face hardness decides everything: a ground-but-soft washer looks correct yet ribbons within months; specify 58–64 HRC on the drawing.", "the 1,700 r/min reference speed is the thermal criterion under load, the 3,400 r/min limiting speed assumes hardened, ground, oiled faces; soft or dry faces drop the real ceiling drastically.", "The 51 kN rating is real only at 58–64 HRC face hardness; visual inspection cannot tell a 45 HRC washer from a 60 HRC one — order certified washers.", "Do not expect misalignment tolerance: a 4 mm rigid needle set edge-loads if the faces tilt even a fraction of a degree — use a spherical or AXW solution where the seat cannot be kept parallel.", "TN polymer and stamped steel cages of the same code (AXK 80105) share envelopes and ratings; the choice is temperature and noise, not load.", "The 51/280 kN ratings and 63 g mass are SKF catalogue values transcribed from ch. 12.1 of PUB BU/P1 17000 (PDF table page 908); mounting data — Ea/Eb raceway diameters and the minimum load factor A — appears in the running text because the structured record carries the boundary envelope only." ], "faq": [ { "q": "How is an AXK thrust assembly mounted?", "a": "Harden or washer-face both tracks across Ea 84–Eb 103 mm, keep faces parallel, locate the cage concentrically against a shoulder or register, grease the needles so they stay pocketed, and never press through them." }, { "q": "What are the dimensions and ratings of the AXK 80105?", "a": "A AXK 80105 measures 80 mm bore × 105 mm outside diameter × 4 mm width (3.15 × 4.134 × 0.157 in). From SKF catalogue PUB BU/P1 17000: dynamic C 51 kN, static C0 280 kN, fatigue limit Pu 34 kN, reference speed 1,700 r/min, limiting speed 3,400 r/min, mass about 63 g. The contact band runs Ea 84–Eb 103 mm; hardened washers or 58–64 HRC faces are required." }, { "q": "Does the AXK 80105 include washers?", "a": "No. AXK is the needle roller and cage thrust assembly only; hardened AS/LS washers or shaft/housing faces at 58–64 HRC, ground over the Ea 84–Eb 103 mm band, supply the two raceways." }, { "q": "How is the AXK 80105 code read?", "a": "AXK marks the needle thrust assembly and 80/105 gives the inner 80 mm and outer 105 mm track diameters directly; the assembly is 4 mm thick. TN means the polymer cage instead of stamped steel." } ], "cross_ref": [ { "equiv_sku": "AXK80105", "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://www.skf.com/group/products/rolling-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.1 needle roller and cage thrust assemblies", "extracted_at": "2026-09-27", "last_verified": "2026-09-27", "confidence_score": 0.7, "status": "published", "aliases": [ "AXK80105", "AXK 80105" ], "locale_variants": {} }, { "sku": "AXK85110", "brand": "SKF", "manufacturer_designation": "AXK 85110", "series": "AXK-series", "type": "needle_roller_thrust", "d_mm": 85, "D_mm": 110, "B_mm": 4, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 52, "static_load_kN": 290, "fatigue_load_limit_kN": 35.5, "reference_speed_rpm": 1700, "limiting_speed_rpm": 3400, "max_rpm": 3400, "weight_g": 67, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 3031", "naming_rule_text": "For transmission gears that would otherwise rub on a housing wall, AXK 85110 supplies a complete needle thrust track between 89 and 108 mm raceway diameters in a 4 mm envelope. Reading the code: AXK marks the needle thrust assembly and the figures 85/110 give the two raceway diameters in millimetres — 85 mm inner track and 110 mm outer track; TN swaps the stamped steel cage for PA66. At this size the stamped steel cage guides long thrust needles; the TN polymer-cage variant is offered where noise matters. One-direction thrust only. One direction only: AXK 85110 cannot be reversed to take opposite thrust — mirror a second bearing for reversing shafts, and keep housing and shaft seats square within the ISO 104 tolerances. Mounting: harden and grind both mating faces to 58–64 HRC over the full Ea 89–Eb 108 mm band (or fit AS/LS washers), drop the 4 mm cage in flat, and never press or hammer the needle complement.", "applications": [ "compact drives where hardened washers replace a machined raceway shoulder", "automotive manual and automatic transmission thrust positions", "torque converter and clutch release assemblies in passenger cars", "small gearbox gears that need a 2 mm thrust shim between a shaft and face" ], "failure_modes": [ "instant raceway scoring when the assembly runs against a face below 58 HRC or with a rough finish", "cage wear from rollers being dragged through unloaded zones under fluctuating thrust", "grease churning and overheating when a high-speed thrust position is over-packed", "rolling-contact fatigue spalling after the catalogue L10 life is exhausted", "edge loading across the needle crowns when the mating faces are not square to the shaft" ], "pitfalls": [ "At 85 mm track diameter, face hardness decides everything: a ground-but-soft washer looks correct yet ribbons within months; specify 58–64 HRC on the drawing.", "The 52 kN rating is real only at 58–64 HRC face hardness; visual inspection cannot tell a 45 HRC washer from a 60 HRC one — order certified washers.", "Do not expect misalignment tolerance: a 4 mm rigid needle set edge-loads if the faces tilt even a fraction of a degree — use a spherical or AXW solution where the seat cannot be kept parallel.", "TN polymer and stamped steel cages of the same code (AXK 85110) share envelopes and ratings; the choice is temperature and noise, not load.", "The AXK code supplies no washers: AXK 85110 arrives as the needle cage only, and a \"bearing failure\" on hard-faced tracks is usually a missing-AS-washer failure at ordering time.", "The 52/290 kN ratings and 67 g mass are SKF catalogue values transcribed from ch. 12.1 of PUB BU/P1 17000 (PDF table page 908); mounting data — Ea/Eb raceway diameters and the minimum load factor A — appears in the running text because the structured record carries the boundary envelope only." ], "faq": [ { "q": "Which dimensions does the AXK 85110 have?", "a": "A AXK 85110 measures 85 mm bore × 110 mm outside diameter × 4 mm width (3.346 × 4.331 × 0.157 in). From SKF catalogue PUB BU/P1 17000: dynamic C 52 kN, static C0 290 kN, fatigue limit Pu 35.5 kN, reference speed 1,700 r/min, limiting speed 3,400 r/min, mass about 67 g. The contact band runs Ea 89–Eb 108 mm; hardened washers or 58–64 HRC faces are required." }, { "q": "What does AXK 85/110 mean?", "a": "A needle roller and cage thrust assembly (ISO 3031) for a 85 mm inner track and 110 mm outer track, 4 mm thick; one-direction axial load, washers ordered separately." }, { "q": "What is the difference between AXK and AXW?", "a": "AXW pairs the AXK needle set with a washer carrying an integral centring spigot that locates in a housing register, keeping cage and washer concentric as one part; AXK is the bare cage-and-needle set needing two separate washers. The AXW still needs a separate LS/AS washer or hardened face on the opposite side." }, { "q": "Does the AXK 85110 tolerate misalignment?", "a": "No — the 4 mm rigid needle set edge-loads on tilted faces. Keep the shaft and housing faces parallel, or choose the self-aligning roller thrust families." } ], "cross_ref": [ { "equiv_sku": "AXK85110", "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://www.skf.com/group/products/rolling-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.1 needle roller and cage thrust assemblies", "extracted_at": "2026-09-27", "last_verified": "2026-09-27", "confidence_score": 0.7, "status": "published", "aliases": [ "AXK85110", "AXK 85110" ], "locale_variants": {} }, { "sku": "AXK90120", "brand": "SKF", "manufacturer_designation": "AXK 90120", "series": "AXK-series", "type": "needle_roller_thrust", "d_mm": 90, "D_mm": 120, "B_mm": 4, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 65.5, "static_load_kN": 405, "fatigue_load_limit_kN": 49, "reference_speed_rpm": 1500, "limiting_speed_rpm": 3000, "max_rpm": 3000, "weight_g": 86, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 3031", "naming_rule_text": "In SKF catalogue PUB BU/P1 17000, AXK 90120 denotes the needle thrust assembly whose code reads the raceway diameters directly — 90/120 — intended to run against hardened, ground washers or machine faces. SKF prints the AXK sizes as adjacent figures, so 90/120 reads 90 then 120 mm; the assembly has no washers of its own — order AS/LS washers or harden the mating faces. The thin section tolerates no misalignment: keep the mating faces parallel, and use the AXW spigot-flanged execution where a one-piece, housing-centred cage-plus-washer unit simplifies assembly. One direction only: AXK 90120 cannot be reversed to take opposite thrust — mirror a second bearing for reversing shafts, and keep housing and shaft seats square within the ISO 104 tolerances. Keep the assembly concentric with a shaft shoulder or the housing register — a needle set walking radially off its track is the most common failure; the AXW flanged version removes this risk entirely.", "applications": [ "compact drives where hardened washers replace a machined raceway shoulder", "automotive manual and automatic transmission thrust positions", "torque converter and clutch release assemblies in passenger cars", "small gearbox gears that need a 2 mm thrust shim between a shaft and face" ], "failure_modes": [ "needle-row denting from a single hard particle trapped in the 2 mm section", "smearing at roller-raceway contacts during unloaded startup before the oil film or preload is established", "grease churning and overheating when a high-speed thrust position is over-packed", "electrical erosion of raceways on VFD-driven shafts without grounding or insulation", "instant raceway scoring when the assembly runs against a face below 58 HRC or with a rough finish" ], "pitfalls": [ "At 90 mm track diameter, face hardness decides everything: a ground-but-soft washer looks correct yet ribbons within months; specify 58–64 HRC on the drawing.", "Match washers by the exact 90–120 mm track — a washer sized to the shaft alone leaves the needles overrunning its edge, which shears the cage.", "the 1,500 r/min reference speed is the thermal criterion under load, the 3,000 r/min limiting speed assumes hardened, ground, oiled faces; soft or dry faces drop the real ceiling drastically.", "The AXK code supplies no washers: AXK 90120 arrives as the needle cage only, and a \"bearing failure\" on hard-faced tracks is usually a missing-AS-washer failure at ordering time.", "The 65.5 kN rating is real only at 58–64 HRC face hardness; visual inspection cannot tell a 45 HRC washer from a 60 HRC one — order certified washers.", "The 65.5/405 kN ratings and 86 g mass are SKF catalogue values transcribed from ch. 12.1 of PUB BU/P1 17000 (PDF table page 910); mounting data — Ea/Eb raceway diameters and the minimum load factor A — appears in the running text because the structured record carries the boundary envelope only." ], "faq": [ { "q": "Does the AXK 90120 tolerate misalignment?", "a": "No — the 4 mm rigid needle set edge-loads on tilted faces. Keep the shaft and housing faces parallel, or choose the self-aligning roller thrust families." }, { "q": "Why does an AXK assembly fail early?", "a": "Almost always the track: missing/undersized washers, hardness below 58 HRC, a sharp shoulder edge catching the cage, or contamination in the thin section. Rating 65.5 kN assumes all of these are correct." }, { "q": "Which dimensions does the AXK 90120 have?", "a": "A AXK 90120 measures 90 mm bore × 120 mm outside diameter × 4 mm width (3.543 × 4.724 × 0.157 in). From SKF catalogue PUB BU/P1 17000: dynamic C 65.5 kN, static C0 405 kN, fatigue limit Pu 49 kN, reference speed 1,500 r/min, limiting speed 3,000 r/min, mass about 86 g. The contact band runs Ea 94–Eb 118 mm; hardened washers or 58–64 HRC faces are required." }, { "q": "What does AXK 90/120 mean?", "a": "A needle roller and cage thrust assembly (ISO 3031) for a 90 mm inner track and 120 mm outer track, 4 mm thick; one-direction axial load, washers ordered separately." } ], "cross_ref": [ { "equiv_sku": "AXK90120", "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://www.skf.com/group/products/rolling-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.1 needle roller and cage thrust assemblies", "extracted_at": "2026-09-27", "last_verified": "2026-09-27", "confidence_score": 0.7, "status": "published", "aliases": [ "AXK90120", "AXK 90120" ], "locale_variants": {} }, { "sku": "AXK100135", "brand": "SKF", "manufacturer_designation": "AXK 100135", "series": "AXK-series", "type": "needle_roller_thrust", "d_mm": 100, "D_mm": 135, "B_mm": 4, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 76.5, "static_load_kN": 560, "fatigue_load_limit_kN": 65.5, "reference_speed_rpm": 1400, "limiting_speed_rpm": 2800, "max_rpm": 2800, "weight_g": 104, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 3031", "naming_rule_text": "SKF's AXK 100135 is not a complete bearing — the stamped steel cage spaces the thrust needles, while hardened AS/LS raceway washers (or shaft and housing faces at 58–64 HRC) provide the two raceways. Reading the code: AXK marks the needle thrust assembly and the figures 100/135 give the two raceway diameters in millimetres — 100 mm inner track and 135 mm outer track; TN swaps the stamped steel cage for PA66. The thin section tolerates no misalignment: keep the mating faces parallel, and use the AXW spigot-flanged execution where a one-piece, housing-centred cage-plus-washer unit simplifies assembly. Speed planning separates the 1,400 r/min thermal reference from the 2,800 r/min mechanical limiting speed. Thrust bearings govern the thermal speed of many vertical arrangements, and oil circulation raises the usable speed substantially above grease values. Keep the assembly concentric with a shaft shoulder or the housing register — a needle set walking radially off its track is the most common failure; the AXW flanged version removes this risk entirely.", "applications": [ "torque converter and clutch release assemblies in passenger cars", "small gearbox gears that need a 2 mm thrust shim between a shaft and face", "light turntables, index plates and office-machine pivots", "two-wheeler gearbox selector and layshaft thrust faces" ], "failure_modes": [ "edge loading across the needle crowns when the mating faces are not square to the shaft", "cage wear from rollers being dragged through unloaded zones under fluctuating thrust", "oil starvation at the sliding contact zones of large spherical roller thrust bearings on forced-feed trips", "electrical erosion of raceways on VFD-driven shafts without grounding or insulation", "needle-row denting from a single hard particle trapped in the 2 mm section" ], "pitfalls": [ "At 100 mm track diameter, face hardness decides everything: a ground-but-soft washer looks correct yet ribbons within months; specify 58–64 HRC on the drawing.", "TN polymer and stamped steel cages of the same code (AXK 100135) share envelopes and ratings; the choice is temperature and noise, not load.", "The AXK code supplies no washers: AXK 100135 arrives as the needle cage only, and a \"bearing failure\" on hard-faced tracks is usually a missing-AS-washer failure at ordering time.", "Match washers by the exact 100–135 mm track — a washer sized to the shaft alone leaves the needles overrunning its edge, which shears the cage.", "the 1,400 r/min reference speed is the thermal criterion under load, the 2,800 r/min limiting speed assumes hardened, ground, oiled faces; soft or dry faces drop the real ceiling drastically.", "The 76.5/560 kN ratings and 104 g mass are SKF catalogue values transcribed from ch. 12.1 of PUB BU/P1 17000 (PDF table page 910); mounting data — Ea/Eb raceway diameters and the minimum load factor A — appears in the running text because the structured record carries the boundary envelope only." ], "faq": [ { "q": "Why does an AXK assembly fail early?", "a": "Almost always the track: missing/undersized washers, hardness below 58 HRC, a sharp shoulder edge catching the cage, or contamination in the thin section. Rating 76.5 kN assumes all of these are correct." }, { "q": "Which dimensions does the AXK 100135 have?", "a": "A AXK 100135 measures 100 mm bore × 135 mm outside diameter × 4 mm width (3.937 × 5.315 × 0.157 in). From SKF catalogue PUB BU/P1 17000: dynamic C 76.5 kN, static C0 560 kN, fatigue limit Pu 65.5 kN, reference speed 1,400 r/min, limiting speed 2,800 r/min, mass about 104 g. The contact band runs Ea 105–Eb 133 mm; hardened washers or 58–64 HRC faces are required." }, { "q": "What does AXK 100/135 mean?", "a": "A needle roller and cage thrust assembly (ISO 3031) for a 100 mm inner track and 135 mm outer track, 4 mm thick; one-direction axial load, washers ordered separately." }, { "q": "What is the difference between AXK and AXW?", "a": "AXW pairs the AXK needle set with a washer carrying an integral centring spigot that locates in a housing register, keeping cage and washer concentric as one part; AXK is the bare cage-and-needle set needing two separate washers. The AXW still needs a separate LS/AS washer or hardened face on the opposite side." } ], "cross_ref": [ { "equiv_sku": "AXK100135", "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://www.skf.com/group/products/rolling-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.1 needle roller and cage thrust assemblies", "extracted_at": "2026-09-27", "last_verified": "2026-09-27", "confidence_score": 0.7, "status": "published", "aliases": [ "AXK100135", "AXK 100135" ], "locale_variants": {} }, { "sku": "AXK110145", "brand": "SKF", "manufacturer_designation": "AXK 110145", "series": "AXK-series", "type": "needle_roller_thrust", "d_mm": 110, "D_mm": 145, "B_mm": 4, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 81.5, "static_load_kN": 620, "fatigue_load_limit_kN": 72, "reference_speed_rpm": 1300, "limiting_speed_rpm": 2600, "max_rpm": 2600, "weight_g": 122, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 3031", "naming_rule_text": "The AXK assembly AXK 110145 covers 110–145 mm in a 4 mm section and is rated 81.5 kN dynamic / 620 kN static: the thinnest rolling thrust support available for that seat. Reading the code: AXK marks the needle thrust assembly and the figures 110/145 give the two raceway diameters in millimetres — 110 mm inner track and 145 mm outer track; TN swaps the stamped steel cage for PA66. The assembly itself has no rings: both raceways must be supplied as hardened washers or machine faces (58–64 HRC, ground), with the contact band covering Ea 115 to Eb 143 mm. One direction only: AXK 110145 cannot be reversed to take opposite thrust — mirror a second bearing for reversing shafts, and keep housing and shaft seats square within the ISO 104 tolerances. Keep the assembly concentric with a shaft shoulder or the housing register — a needle set walking radially off its track is the most common failure; the AXW flanged version removes this risk entirely.", "applications": [ "compact drives where hardened washers replace a machined raceway shoulder", "automotive manual and automatic transmission thrust positions", "torque converter and clutch release assemblies in passenger cars", "small gearbox gears that need a 2 mm thrust shim between a shaft and face" ], "failure_modes": [ "edge loading across the needle crowns when the mating faces are not square to the shaft", "roller skidding and raceway glazing once the thrust falls below the catalogue minimum axial load (factor A)", "abrasive paste forming as dust bypasses the housing seals into the open washer set", "electrical erosion of raceways on VFD-driven shafts without grounding or insulation", "needle-row denting from a single hard particle trapped in the 2 mm section" ], "pitfalls": [ "At 110 mm track diameter, face hardness decides everything: a ground-but-soft washer looks correct yet ribbons within months; specify 58–64 HRC on the drawing.", "TN polymer and stamped steel cages of the same code (AXK 110145) share envelopes and ratings; the choice is temperature and noise, not load.", "The AXK code supplies no washers: AXK 110145 arrives as the needle cage only, and a \"bearing failure\" on hard-faced tracks is usually a missing-AS-washer failure at ordering time.", "The 81.5 kN rating is real only at 58–64 HRC face hardness; visual inspection cannot tell a 45 HRC washer from a 60 HRC one — order certified washers.", "Do not expect misalignment tolerance: a 4 mm rigid needle set edge-loads if the faces tilt even a fraction of a degree — use a spherical or AXW solution where the seat cannot be kept parallel.", "The 81.5/620 kN ratings and 122 g mass are SKF catalogue values transcribed from ch. 12.1 of PUB BU/P1 17000 (PDF table page 910); mounting data — Ea/Eb raceway diameters and the minimum load factor A — appears in the running text because the structured record carries the boundary envelope only." ], "faq": [ { "q": "What is the difference between AXK and AXW?", "a": "AXW pairs the AXK needle set with a washer carrying an integral centring spigot that locates in a housing register, keeping cage and washer concentric as one part; AXK is the bare cage-and-needle set needing two separate washers. The AXW still needs a separate LS/AS washer or hardened face on the opposite side." }, { "q": "Does the AXK 110145 tolerate misalignment?", "a": "No — the 4 mm rigid needle set edge-loads on tilted faces. Keep the shaft and housing faces parallel, or choose the self-aligning roller thrust families." }, { "q": "Why does an AXK assembly fail early?", "a": "Almost always the track: missing/undersized washers, hardness below 58 HRC, a sharp shoulder edge catching the cage, or contamination in the thin section. Rating 81.5 kN assumes all of these are correct." }, { "q": "Which dimensions does the AXK 110145 have?", "a": "A AXK 110145 measures 110 mm bore × 145 mm outside diameter × 4 mm width (4.331 × 5.709 × 0.157 in). From SKF catalogue PUB BU/P1 17000: dynamic C 81.5 kN, static C0 620 kN, fatigue limit Pu 72 kN, reference speed 1,300 r/min, limiting speed 2,600 r/min, mass about 122 g. The contact band runs Ea 115–Eb 143 mm; hardened washers or 58–64 HRC faces are required." } ], "cross_ref": [ { "equiv_sku": "AXK110145", "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://www.skf.com/group/products/rolling-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.1 needle roller and cage thrust assemblies", "extracted_at": "2026-09-27", "last_verified": "2026-09-27", "confidence_score": 0.7, "status": "published", "aliases": [ "AXK110145", "AXK 110145" ], "locale_variants": {} }, { "sku": "AXK120155", "brand": "SKF", "manufacturer_designation": "AXK 120155", "series": "AXK-series", "type": "needle_roller_thrust", "d_mm": 120, "D_mm": 155, "B_mm": 4, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 86.5, "static_load_kN": 680, "fatigue_load_limit_kN": 76.5, "reference_speed_rpm": 1300, "limiting_speed_rpm": 2600, "max_rpm": 2600, "weight_g": 131, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 3031", "naming_rule_text": "In SKF catalogue PUB BU/P1 17000, AXK 120155 denotes the needle thrust assembly whose code reads the raceway diameters directly — 120/155 — intended to run against hardened, ground washers or machine faces. Reading the code: AXK marks the needle thrust assembly and the figures 120/155 give the two raceway diameters in millimetres — 120 mm inner track and 155 mm outer track; TN swaps the stamped steel cage for PA66. At this size the stamped steel cage guides long thrust needles; the TN polymer-cage variant is offered where noise matters. One-direction thrust only. The 131 g mass and 4 mm axial height sit between 120 and 155 mm washer diameters; check the seat shoulder spans the full ring face — a narrow shoulder causes washer fretting long before fatigue does. Keep the assembly concentric with a shaft shoulder or the housing register — a needle set walking radially off its track is the most common failure; the AXW flanged version removes this risk entirely.", "applications": [ "light turntables, index plates and office-machine pivots", "two-wheeler gearbox selector and layshaft thrust faces", "compact drives where hardened washers replace a machined raceway shoulder", "automotive manual and automatic transmission thrust positions" ], "failure_modes": [ "edge loading across the needle crowns when the mating faces are not square to the shaft", "smearing at roller-raceway contacts during unloaded startup before the oil film or preload is established", "grease churning and overheating when a high-speed thrust position is over-packed", "electrical erosion of raceways on VFD-driven shafts without grounding or insulation", "needle-row denting from a single hard particle trapped in the 2 mm section" ], "pitfalls": [ "Above 110 mm the large AXK sets (120–155 mm) are assembled standing up in vertical gearboxes — retain the cage or it walks off its track before the first bolt is torqued.", "TN polymer and stamped steel cages of the same code (AXK 120155) share envelopes and ratings; the choice is temperature and noise, not load.", "The AXK code supplies no washers: AXK 120155 arrives as the needle cage only, and a \"bearing failure\" on hard-faced tracks is usually a missing-AS-washer failure at ordering time.", "Match washers by the exact 120–155 mm track — a washer sized to the shaft alone leaves the needles overrunning its edge, which shears the cage.", "the 1,300 r/min reference speed is the thermal criterion under load, the 2,600 r/min limiting speed assumes hardened, ground, oiled faces; soft or dry faces drop the real ceiling drastically.", "The 86.5/680 kN ratings and 131 g mass are SKF catalogue values transcribed from ch. 12.1 of PUB BU/P1 17000 (PDF table page 910); mounting data — Ea/Eb raceway diameters and the minimum load factor A — appears in the running text because the structured record carries the boundary envelope only." ], "faq": [ { "q": "Which dimensions does the AXK 120155 have?", "a": "A AXK 120155 measures 120 mm bore × 155 mm outside diameter × 4 mm width (4.724 × 6.102 × 0.157 in). From SKF catalogue PUB BU/P1 17000: dynamic C 86.5 kN, static C0 680 kN, fatigue limit Pu 76.5 kN, reference speed 1,300 r/min, limiting speed 2,600 r/min, mass about 131 g. The contact band runs Ea 125–Eb 153 mm; hardened washers or 58–64 HRC faces are required." }, { "q": "What does AXK 120/155 mean?", "a": "A needle roller and cage thrust assembly (ISO 3031) for a 120 mm inner track and 155 mm outer track, 4 mm thick; one-direction axial load, washers ordered separately." }, { "q": "What is the difference between AXK and AXW?", "a": "AXW pairs the AXK needle set with a washer carrying an integral centring spigot that locates in a housing register, keeping cage and washer concentric as one part; AXK is the bare cage-and-needle set needing two separate washers. The AXW still needs a separate LS/AS washer or hardened face on the opposite side." }, { "q": "Does the AXK 120155 tolerate misalignment?", "a": "No — the 4 mm rigid needle set edge-loads on tilted faces. Keep the shaft and housing faces parallel, or choose the self-aligning roller thrust families." } ], "cross_ref": [ { "equiv_sku": "AXK120155", "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://www.skf.com/group/products/rolling-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.1 needle roller and cage thrust assemblies", "extracted_at": "2026-09-27", "last_verified": "2026-09-27", "confidence_score": 0.7, "status": "published", "aliases": [ "AXK120155", "AXK 120155" ], "locale_variants": {} }, { "sku": "AXK130170", "brand": "SKF", "manufacturer_designation": "AXK 130170", "series": "AXK-series", "type": "needle_roller_thrust", "d_mm": 130, "D_mm": 170, "B_mm": 5, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 112, "static_load_kN": 830, "fatigue_load_limit_kN": 93, "reference_speed_rpm": 1100, "limiting_speed_rpm": 2200, "max_rpm": 2200, "weight_g": 205, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 3031", "naming_rule_text": "The AXK assembly AXK 130170 covers 130–170 mm in a 5 mm section and is rated 112 kN dynamic / 830 kN static: the thinnest rolling thrust support available for that seat. In AXK 130170 the number is the boundary plan, not a bore code: 130/170, with the 5 mm assembly thickness fixed by the ISO 3031 plan and Ea/Eb 136/167 mm marking the actual needle-contact band. Washer selection is part of the bearing: too-soft faces rib within weeks even though the 112 kN rating is unchanged — the AXK code only supplies the rolling elements. Selection arithmetic: C 112 kN against C0 830 kN gives a C0/C ratio of 7.41 — thrust bearings are chosen on static rating and F_a/C0 more often than on L10 life. Mounting: harden and grind both mating faces to 58–64 HRC over the full Ea 136–Eb 167 mm band (or fit AS/LS washers), drop the 5 mm cage in flat, and never press or hammer the needle complement.", "applications": [ "automotive manual and automatic transmission thrust positions", "torque converter and clutch release assemblies in passenger cars", "small gearbox gears that need a 2 mm thrust shim between a shaft and face", "light turntables, index plates and office-machine pivots" ], "failure_modes": [ "needle-row denting from a single hard particle trapped in the 2 mm section", "cage wear from rollers being dragged through unloaded zones under fluctuating thrust", "grease churning and overheating when a high-speed thrust position is over-packed", "rolling-contact fatigue spalling after the catalogue L10 life is exhausted", "instant raceway scoring when the assembly runs against a face below 58 HRC or with a rough finish" ], "pitfalls": [ "Above 110 mm the large AXK sets (130–170 mm) are assembled standing up in vertical gearboxes — retain the cage or it walks off its track before the first bolt is torqued.", "Do not expect misalignment tolerance: a 5 mm rigid needle set edge-loads if the faces tilt even a fraction of a degree — use a spherical or AXW solution where the seat cannot be kept parallel.", "TN polymer and stamped steel cages of the same code (AXK 130170) share envelopes and ratings; the choice is temperature and noise, not load.", "The AXK code supplies no washers: AXK 130170 arrives as the needle cage only, and a \"bearing failure\" on hard-faced tracks is usually a missing-AS-washer failure at ordering time.", "Match washers by the exact 130–170 mm track — a washer sized to the shaft alone leaves the needles overrunning its edge, which shears the cage.", "The 112/830 kN ratings and 205 g mass are SKF catalogue values transcribed from ch. 12.1 of PUB BU/P1 17000 (PDF table page 910); mounting data — Ea/Eb raceway diameters and the minimum load factor A — appears in the running text because the structured record carries the boundary envelope only." ], "faq": [ { "q": "What are the dimensions and ratings of the AXK 130170?", "a": "A AXK 130170 measures 130 mm bore × 170 mm outside diameter × 5 mm width (5.118 × 6.693 × 0.197 in). From SKF catalogue PUB BU/P1 17000: dynamic C 112 kN, static C0 830 kN, fatigue limit Pu 93 kN, reference speed 1,100 r/min, limiting speed 2,200 r/min, mass about 205 g. The contact band runs Ea 136–Eb 167 mm; hardened washers or 58–64 HRC faces are required." }, { "q": "Does the AXK 130170 include washers?", "a": "No. AXK is the needle roller and cage thrust assembly only; hardened AS/LS washers or shaft/housing faces at 58–64 HRC, ground over the Ea 136–Eb 167 mm band, supply the two raceways." }, { "q": "How is the AXK 130170 code read?", "a": "AXK marks the needle thrust assembly and 130/170 gives the inner 130 mm and outer 170 mm track diameters directly; the assembly is 5 mm thick. TN means the polymer cage instead of stamped steel." }, { "q": "What minimum hardness do the mating faces need?", "a": "58–64 HRC with a ground raceway finish. A softer face looks fine after assembly but the needles rib and score it within weeks despite the 112 kN catalogue rating — order certified washers if the shaft/housing cannot be heat treated." } ], "cross_ref": [ { "equiv_sku": "AXK130170", "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://www.skf.com/group/products/rolling-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.1 needle roller and cage thrust assemblies", "extracted_at": "2026-09-27", "last_verified": "2026-09-27", "confidence_score": 0.7, "status": "published", "aliases": [ "AXK130170", "AXK 130170" ], "locale_variants": {} }, { "sku": "AXK140180", "brand": "SKF", "manufacturer_designation": "AXK 140180", "series": "AXK-series", "type": "needle_roller_thrust", "d_mm": 140, "D_mm": 180, "B_mm": 5, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 116, "static_load_kN": 900, "fatigue_load_limit_kN": 96.5, "reference_speed_rpm": 1000, "limiting_speed_rpm": 2000, "max_rpm": 2000, "weight_g": 219, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 3031", "naming_rule_text": "In SKF catalogue PUB BU/P1 17000, AXK 140180 denotes the needle thrust assembly whose code reads the raceway diameters directly — 140/180 — intended to run against hardened, ground washers or machine faces. In AXK 140180 the number is the boundary plan, not a bore code: 140/180, with the 5 mm assembly thickness fixed by the ISO 3031 plan and Ea/Eb 146/177 mm marking the actual needle-contact band. Washer selection is part of the bearing: too-soft faces rib within weeks even though the 116 kN rating is unchanged — the AXK code only supplies the rolling elements. The 219 g mass and 5 mm axial height sit between 140 and 180 mm washer diameters; check the seat shoulder spans the full ring face — a narrow shoulder causes washer fretting long before fatigue does. Grease both faces before assembly so the needles stay in their pockets, especially for the 5 mm thin set; after fitting, rotate slowly and confirm the cage does not catch on the shoulder edges.", "applications": [ "light turntables, index plates and office-machine pivots", "two-wheeler gearbox selector and layshaft thrust faces", "compact drives where hardened washers replace a machined raceway shoulder", "automotive manual and automatic transmission thrust positions" ], "failure_modes": [ "needle-row denting from a single hard particle trapped in the 2 mm section", "cage wear from rollers being dragged through unloaded zones under fluctuating thrust", "abrasive paste forming as dust bypasses the housing seals into the open washer set", "condensation pitting in machines that run intermittently in humid environments", "instant raceway scoring when the assembly runs against a face below 58 HRC or with a rough finish" ], "pitfalls": [ "Above 110 mm the large AXK sets (140–180 mm) are assembled standing up in vertical gearboxes — retain the cage or it walks off its track before the first bolt is torqued.", "Do not expect misalignment tolerance: a 5 mm rigid needle set edge-loads if the faces tilt even a fraction of a degree — use a spherical or AXW solution where the seat cannot be kept parallel.", "TN polymer and stamped steel cages of the same code (AXK 140180) share envelopes and ratings; the choice is temperature and noise, not load.", "the 1,000 r/min reference speed is the thermal criterion under load, the 2,000 r/min limiting speed assumes hardened, ground, oiled faces; soft or dry faces drop the real ceiling drastically.", "The 116 kN rating is real only at 58–64 HRC face hardness; visual inspection cannot tell a 45 HRC washer from a 60 HRC one — order certified washers.", "The 116/900 kN ratings and 219 g mass are SKF catalogue values transcribed from ch. 12.1 of PUB BU/P1 17000 (PDF table page 910); mounting data — Ea/Eb raceway diameters and the minimum load factor A — appears in the running text because the structured record carries the boundary envelope only." ], "faq": [ { "q": "How is the AXK 140180 code read?", "a": "AXK marks the needle thrust assembly and 140/180 gives the inner 140 mm and outer 180 mm track diameters directly; the assembly is 5 mm thick. TN means the polymer cage instead of stamped steel." }, { "q": "What minimum hardness do the mating faces need?", "a": "58–64 HRC with a ground raceway finish. A softer face looks fine after assembly but the needles rib and score it within weeks despite the 116 kN catalogue rating — order certified washers if the shaft/housing cannot be heat treated." }, { "q": "How is an AXK thrust assembly mounted?", "a": "Harden or washer-face both tracks across Ea 146–Eb 177 mm, keep faces parallel, locate the cage concentrically against a shoulder or register, grease the needles so they stay pocketed, and never press through them." }, { "q": "What are the dimensions and ratings of the AXK 140180?", "a": "A AXK 140180 measures 140 mm bore × 180 mm outside diameter × 5 mm width (5.512 × 7.087 × 0.197 in). From SKF catalogue PUB BU/P1 17000: dynamic C 116 kN, static C0 900 kN, fatigue limit Pu 96.5 kN, reference speed 1,000 r/min, limiting speed 2,000 r/min, mass about 219 g. The contact band runs Ea 146–Eb 177 mm; hardened washers or 58–64 HRC faces are required." } ], "cross_ref": [ { "equiv_sku": "AXK140180", "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://www.skf.com/group/products/rolling-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.1 needle roller and cage thrust assemblies", "extracted_at": "2026-09-27", "last_verified": "2026-09-27", "confidence_score": 0.7, "status": "published", "aliases": [ "AXK140180", "AXK 140180" ], "locale_variants": {} }, { "sku": "AXK150190", "brand": "SKF", "manufacturer_designation": "AXK 150190", "series": "AXK-series", "type": "needle_roller_thrust", "d_mm": 150, "D_mm": 190, "B_mm": 5, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 120, "static_load_kN": 950, "fatigue_load_limit_kN": 102, "reference_speed_rpm": 1000, "limiting_speed_rpm": 2000, "max_rpm": 2000, "weight_g": 232, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 3031", "naming_rule_text": "AXK 150190 gives thrust capacity in the height of a shim: 150 mm inner track, 190 mm outer track, only 5 mm thick, with needles held by the stamped steel cage for one-direction axial load. SKF prints the AXK sizes as adjacent figures, so 150/190 reads 150 then 190 mm; the assembly has no washers of its own — order AS/LS washers or harden the mating faces. The thin section tolerates no misalignment: keep the mating faces parallel, and use the AXW spigot-flanged execution where a one-piece, housing-centred cage-plus-washer unit simplifies assembly. Selection arithmetic: C 120 kN against C0 950 kN gives a C0/C ratio of 7.92 — thrust bearings are chosen on static rating and F_a/C0 more often than on L10 life. Grease both faces before assembly so the needles stay in their pockets, especially for the 5 mm thin set; after fitting, rotate slowly and confirm the cage does not catch on the shoulder edges.", "applications": [ "automotive manual and automatic transmission thrust positions", "torque converter and clutch release assemblies in passenger cars", "small gearbox gears that need a 2 mm thrust shim between a shaft and face", "light turntables, index plates and office-machine pivots" ], "failure_modes": [ "instant raceway scoring when the assembly runs against a face below 58 HRC or with a rough finish", "roller skidding and raceway glazing once the thrust falls below the catalogue minimum axial load (factor A)", "grease churning and overheating when a high-speed thrust position is over-packed", "condensation pitting in machines that run intermittently in humid environments", "edge loading across the needle crowns when the mating faces are not square to the shaft" ], "pitfalls": [ "Above 110 mm the large AXK sets (150–190 mm) are assembled standing up in vertical gearboxes — retain the cage or it walks off its track before the first bolt is torqued.", "The 120 kN rating is real only at 58–64 HRC face hardness; visual inspection cannot tell a 45 HRC washer from a 60 HRC one — order certified washers.", "Do not expect misalignment tolerance: a 5 mm rigid needle set edge-loads if the faces tilt even a fraction of a degree — use a spherical or AXW solution where the seat cannot be kept parallel.", "The AXK code supplies no washers: AXK 150190 arrives as the needle cage only, and a \"bearing failure\" on hard-faced tracks is usually a missing-AS-washer failure at ordering time.", "Match washers by the exact 150–190 mm track — a washer sized to the shaft alone leaves the needles overrunning its edge, which shears the cage.", "The 120/950 kN ratings and 232 g mass are SKF catalogue values transcribed from ch. 12.1 of PUB BU/P1 17000 (PDF table page 910); mounting data — Ea/Eb raceway diameters and the minimum load factor A — appears in the running text because the structured record carries the boundary envelope only." ], "faq": [ { "q": "Which dimensions does the AXK 150190 have?", "a": "A AXK 150190 measures 150 mm bore × 190 mm outside diameter × 5 mm width (5.906 × 7.48 × 0.197 in). From SKF catalogue PUB BU/P1 17000: dynamic C 120 kN, static C0 950 kN, fatigue limit Pu 102 kN, reference speed 1,000 r/min, limiting speed 2,000 r/min, mass about 232 g. The contact band runs Ea 156–Eb 187 mm; hardened washers or 58–64 HRC faces are required." }, { "q": "What does AXK 150/190 mean?", "a": "A needle roller and cage thrust assembly (ISO 3031) for a 150 mm inner track and 190 mm outer track, 5 mm thick; one-direction axial load, washers ordered separately." }, { "q": "What is the difference between AXK and AXW?", "a": "AXW pairs the AXK needle set with a washer carrying an integral centring spigot that locates in a housing register, keeping cage and washer concentric as one part; AXK is the bare cage-and-needle set needing two separate washers. The AXW still needs a separate LS/AS washer or hardened face on the opposite side." }, { "q": "Does the AXK 150190 tolerate misalignment?", "a": "No — the 5 mm rigid needle set edge-loads on tilted faces. Keep the shaft and housing faces parallel, or choose the self-aligning roller thrust families." } ], "cross_ref": [ { "equiv_sku": "AXK150190", "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://www.skf.com/group/products/rolling-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.1 needle roller and cage thrust assemblies", "extracted_at": "2026-09-27", "last_verified": "2026-09-27", "confidence_score": 0.7, "status": "published", "aliases": [ "AXK150190", "AXK 150190" ], "locale_variants": {} }, { "sku": "AXK160200", "brand": "SKF", "manufacturer_designation": "AXK 160200", "series": "AXK-series", "type": "needle_roller_thrust", "d_mm": 160, "D_mm": 200, "B_mm": 5, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 125, "static_load_kN": 1000, "fatigue_load_limit_kN": 106, "reference_speed_rpm": 950, "limiting_speed_rpm": 1900, "max_rpm": 1900, "weight_g": 246, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 3031", "naming_rule_text": "The AXK assembly AXK 160200 covers 160–200 mm in a 5 mm section and is rated 125 kN dynamic / 1000 kN static: the thinnest rolling thrust support available for that seat. In AXK 160200 the number is the boundary plan, not a bore code: 160/200, with the 5 mm assembly thickness fixed by the ISO 3031 plan and Ea/Eb 166/197 mm marking the actual needle-contact band. The assembly itself has no rings: both raceways must be supplied as hardened washers or machine faces (58–64 HRC, ground), with the contact band covering Ea 166 to Eb 197 mm. Static safety matters for shock duty: compare peak axial force against C0 1000 kN with the application's static factor, since crane hooks and screw positions see their worst load at zero or low speed. Keep the assembly concentric with a shaft shoulder or the housing register — a needle set walking radially off its track is the most common failure; the AXW flanged version removes this risk entirely.", "applications": [ "two-wheeler gearbox selector and layshaft thrust faces", "compact drives where hardened washers replace a machined raceway shoulder", "automotive manual and automatic transmission thrust positions", "torque converter and clutch release assemblies in passenger cars" ], "failure_modes": [ "needle-row denting from a single hard particle trapped in the 2 mm section", "roller skidding and raceway glazing once the thrust falls below the catalogue minimum axial load (factor A)", "abrasive paste forming as dust bypasses the housing seals into the open washer set", "electrical erosion of raceways on VFD-driven shafts without grounding or insulation", "instant raceway scoring when the assembly runs against a face below 58 HRC or with a rough finish" ], "pitfalls": [ "Above 110 mm the large AXK sets (160–200 mm) are assembled standing up in vertical gearboxes — retain the cage or it walks off its track before the first bolt is torqued.", "Do not expect misalignment tolerance: a 5 mm rigid needle set edge-loads if the faces tilt even a fraction of a degree — use a spherical or AXW solution where the seat cannot be kept parallel.", "TN polymer and stamped steel cages of the same code (AXK 160200) share envelopes and ratings; the choice is temperature and noise, not load.", "The 125 kN rating is real only at 58–64 HRC face hardness; visual inspection cannot tell a 45 HRC washer from a 60 HRC one — order certified washers.", "The AXK code supplies no washers: AXK 160200 arrives as the needle cage only, and a \"bearing failure\" on hard-faced tracks is usually a missing-AS-washer failure at ordering time.", "The 125/1000 kN ratings and 246 g mass are SKF catalogue values transcribed from ch. 12.1 of PUB BU/P1 17000 (PDF table page 910); mounting data — Ea/Eb raceway diameters and the minimum load factor A — appears in the running text because the structured record carries the boundary envelope only." ], "faq": [ { "q": "How is an AXK thrust assembly mounted?", "a": "Harden or washer-face both tracks across Ea 166–Eb 197 mm, keep faces parallel, locate the cage concentrically against a shoulder or register, grease the needles so they stay pocketed, and never press through them." }, { "q": "What are the dimensions and ratings of the AXK 160200?", "a": "A AXK 160200 measures 160 mm bore × 200 mm outside diameter × 5 mm width (6.299 × 7.874 × 0.197 in). From SKF catalogue PUB BU/P1 17000: dynamic C 125 kN, static C0 1000 kN, fatigue limit Pu 106 kN, reference speed 950 r/min, limiting speed 1,900 r/min, mass about 246 g. The contact band runs Ea 166–Eb 197 mm; hardened washers or 58–64 HRC faces are required." }, { "q": "Does the AXK 160200 include washers?", "a": "No. AXK is the needle roller and cage thrust assembly only; hardened AS/LS washers or shaft/housing faces at 58–64 HRC, ground over the Ea 166–Eb 197 mm band, supply the two raceways." }, { "q": "How is the AXK 160200 code read?", "a": "AXK marks the needle thrust assembly and 160/200 gives the inner 160 mm and outer 200 mm track diameters directly; the assembly is 5 mm thick. TN means the polymer cage instead of stamped steel." } ], "cross_ref": [ { "equiv_sku": "AXK160200", "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://www.skf.com/group/products/rolling-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.1 needle roller and cage thrust assemblies", "extracted_at": "2026-09-27", "last_verified": "2026-09-27", "confidence_score": 0.7, "status": "published", "aliases": [ "AXK160200", "AXK 160200" ], "locale_variants": {} }, { "sku": "AXW10", "brand": "SKF", "manufacturer_designation": "AXW 10", "series": "AXW-series", "type": "needle_roller_thrust", "d_mm": 10, "D_mm": 27, "B_mm": 3.2, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 8.5, "static_load_kN": 26, "fatigue_load_limit_kN": 3, "reference_speed_rpm": 5300, "limiting_speed_rpm": 10000, "max_rpm": 10000, "weight_g": 8.3, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 3031", "naming_rule_text": "In the AXW needle roller thrust bearings with centring flange, AXW 10 denotes the spigot-centred execution: the flange seats in a matching housing register so the needle set stays concentric without piloting on the shaft, and the opposite raceway is a separate LS/AS washer or a hardened machine face. Reading the code: AXW marks the spigot-flanged needle roller thrust bearing and the figure 10 gives the bore in millimetres; the 27 mm OD and 3.2 mm height follow the series plan, and D1 14 mm is the spigot diameter. The integrated washer carries a 14 mm centring spigot (3 mm flange height) that locates the whole unit in a matching housing register bore — the 10 mm bore clears the shaft and does no radial piloting. One direction only: AXW 10 cannot be reversed to take opposite thrust — mirror a second bearing for reversing shafts, and keep housing and shaft seats square within the ISO 104 tolerances. Mounting: locate the 14 mm spigot in the housing register bore (at least 3 mm deep), pass the 10 mm bore over the shaft without forcing a pilot fit, and fit a separate LS/AS washer or a hardened 58–64 HRC face on the opposite side.", "applications": [ "material-handling swivel joints using the spigot as a built-in housing pilot", "transmission shafts where a one-piece spigot-centred thrust unit replaces a loose cage-and-washer stack at the housing register", "automotive selector and shift mechanisms needing a pre-centred flanged thrust support in a shallow housing bore", "agricultural gear drives assembled through a housing cover, where the spigot keeps the needle set concentric until the cover is bolted" ], "failure_modes": [ "spigot lip deformation after a hammer blow or cocked assembly at fitting", "smearing at roller-raceway contacts during unloaded startup before the oil film or preload is established", "edge loading across the needle crowns when the mating faces are not square to the shaft", "rolling-contact fatigue spalling after the catalogue L10 life is exhausted" ], "pitfalls": [ "At 10 mm bore the 14 mm spigot lip is thin enough to bend with pliers — handle AXW 10 by the washer face, never by the flange.", "AXW is not an ISO-standardized interchangeable outline for every maker — check the 27×3.2 mm envelope and the 14 mm spigot before cross-brand substitution.", "The 8.5 kN rating still requires a hardened opposing face: the integrated washer is one raceway only, and the other track is a separate LS/AS washer or a 58–64 HRC machine face.", "The spigot pilots in the housing register, not on the shaft: turning the 10 mm bore into a tight pilot fit, or omitting the 14 mm register bore, defeats the centring function of AXW 10.", "the 5,300 r/min reference speed is the thermal criterion under load, limiting speed 10,000 r/min; the open needle set needs the housing to keep grit out.", "The 8.5/26 kN ratings and 8.3 g mass are SKF catalogue values transcribed from ch. 12.2 of PUB BU/P1 17000 (PDF table page 912); mounting data — Ea/Eb raceway diameters, the flange register and the load factor — appears in the running text because the structured record carries the boundary envelope only." ], "faq": [ { "q": "Can the AXW 10 take radial load?", "a": "No. The spigot is a locating pilot, not a radial bearing: the needle set carries one-direction thrust (8.5 kN dynamic) and the shaft arrangement carries all radial force." }, { "q": "Does the AXW 10 run in both axial directions?", "a": "No — one direction only. Reversing thrust lifts the needles off the 23 mm outer track; mirror a second spigot-flanged unit for reversing shafts." }, { "q": "What are the common mounting mistakes?", "a": "Pressing on the spigot lip, boring no register (or a wrong-size 14 mm register) in the housing, forcing the 10 mm bore into a pilot fit, leaving the opposite face soft, or skipping grease in the 3.2 mm section — each shows up as cage or track damage within hours." }, { "q": "Which dimensions does the AXW 10 have?", "a": "A AXW 10 measures 10 mm bore × 27 mm outside diameter × 3.2 mm width (0.394 × 1.063 × 0.126 in). From SKF catalogue PUB BU/P1 17000: dynamic C 8.5 kN, static C0 26 kN, fatigue limit Pu 3 kN, reference speed 5,300 r/min, limiting speed 10,000 r/min, mass about 8.3 g. Centring spigot D1 14 mm, spigot height B1 3 mm, contact band Ea 12–23 mm." } ], "cross_ref": [ { "equiv_sku": "AXW10", "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://www.skf.com/group/products/rolling-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.2 needle roller thrust bearings with a centring flange", "extracted_at": "2026-09-27", "last_verified": "2026-09-27", "confidence_score": 0.7, "status": "published", "aliases": [ "AXW10", "AXW 10" ], "locale_variants": {} }, { "sku": "AXW12", "brand": "SKF", "manufacturer_designation": "AXW 12", "series": "AXW-series", "type": "needle_roller_thrust", "d_mm": 12, "D_mm": 29, "B_mm": 3.2, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 9.15, "static_load_kN": 30, "fatigue_load_limit_kN": 3.45, "reference_speed_rpm": 5000, "limiting_speed_rpm": 10000, "max_rpm": 10000, "weight_g": 9.1, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 3031", "naming_rule_text": "AXW 12 is a needle roller thrust bearing with an integral centring spigot: an AXK-style needle cage running against a hardened thrust washer whose 16 mm spigot flange locates the unit in the housing register, sized 12×29×3.2 mm overall. AXW numbering gives the bore directly (12 mm for AXW 12); the needle set inside is the AXK 1226 track with 9.15 kN dynamic rating. The integrated washer carries a 16 mm centring spigot (3 mm flange height) that locates the whole unit in a matching housing register bore — the 12 mm bore clears the shaft and does no radial piloting. One direction only: AXW 12 cannot be reversed to take opposite thrust — mirror a second bearing for reversing shafts, and keep housing and shaft seats square within the ISO 104 tolerances. Mounting: locate the 16 mm spigot in the housing register bore (at least 3 mm deep), pass the 12 mm bore over the shaft without forcing a pilot fit, and fit a separate LS/AS washer or a hardened 58–64 HRC face on the opposite side.", "applications": [ "material-handling swivel joints using the spigot as a built-in housing pilot", "transmission shafts where a one-piece spigot-centred thrust unit replaces a loose cage-and-washer stack at the housing register", "automotive selector and shift mechanisms needing a pre-centred flanged thrust support in a shallow housing bore", "agricultural gear drives assembled through a housing cover, where the spigot keeps the needle set concentric until the cover is bolted" ], "failure_modes": [ "opposing-track scoring when the separate LS/AS washer or hardened 58–64 HRC face is missing or undersized", "roller skidding and raceway glazing once the thrust falls below the catalogue minimum axial load (factor A)", "instant raceway scoring when the assembly runs against a face below 58 HRC or with a rough finish", "rolling-contact fatigue spalling after the catalogue L10 life is exhausted" ], "pitfalls": [ "At 12 mm bore the 16 mm spigot lip is thin enough to bend with pliers — handle AXW 12 by the washer face, never by the flange.", "the 5,000 r/min reference speed is the thermal criterion under load, limiting speed 10,000 r/min; the open needle set needs the housing to keep grit out.", "One-direction thrust: reversing force dumps the needles off the 25 mm outer track — mirror a second spigot-flanged unit where the load reverses.", "The spigot pilots in the housing register, not on the shaft: turning the 12 mm bore into a tight pilot fit, or omitting the 16 mm register bore, defeats the centring function of AXW 12.", "AXW is not an ISO-standardized interchangeable outline for every maker — check the 29×3.2 mm envelope and the 16 mm spigot before cross-brand substitution.", "The 9.15/30 kN ratings and 9.1 g mass are SKF catalogue values transcribed from ch. 12.2 of PUB BU/P1 17000 (PDF table page 912); mounting data — Ea/Eb raceway diameters, the flange register and the load factor — appears in the running text because the structured record carries the boundary envelope only." ], "faq": [ { "q": "Which dimensions does the AXW 12 have?", "a": "A AXW 12 measures 12 mm bore × 29 mm outside diameter × 3.2 mm width (0.472 × 1.142 × 0.126 in). From SKF catalogue PUB BU/P1 17000: dynamic C 9.15 kN, static C0 30 kN, fatigue limit Pu 3.45 kN, reference speed 5,000 r/min, limiting speed 10,000 r/min, mass about 9.1 g. Centring spigot D1 16 mm, spigot height B1 3 mm, contact band Ea 14–25 mm." }, { "q": "What does AXW mean versus AXK?", "a": "AXW pairs an AXK needle set with a washer that has an integral centring spigot — the spigot locates in a housing register and keeps the set concentric as one part; AXK is the bare cage needing two separate washers. A separate LS/AS washer or hardened face is still required opposite, and the outline is not multi-brand interchangeable." }, { "q": "Can the AXW 12 take radial load?", "a": "No. The spigot is a locating pilot, not a radial bearing: the needle set carries one-direction thrust (9.15 kN dynamic) and the shaft arrangement carries all radial force." }, { "q": "Does the AXW 12 run in both axial directions?", "a": "No — one direction only. Reversing thrust lifts the needles off the 25 mm outer track; mirror a second spigot-flanged unit for reversing shafts." } ], "cross_ref": [ { "equiv_sku": "AXW12", "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://www.skf.com/group/products/rolling-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.2 needle roller thrust bearings with a centring flange", "extracted_at": "2026-09-27", "last_verified": "2026-09-27", "confidence_score": 0.7, "status": "published", "aliases": [ "AXW12", "AXW 12" ], "locale_variants": {} }, { "sku": "AXW15", "brand": "SKF", "manufacturer_designation": "AXW 15", "series": "AXW-series", "type": "needle_roller_thrust", "d_mm": 15, "D_mm": 31, "B_mm": 3.2, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 10.4, "static_load_kN": 37.5, "fatigue_load_limit_kN": 4.3, "reference_speed_rpm": 4800, "limiting_speed_rpm": 9500, "max_rpm": 9500, "weight_g": 10, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 3031", "naming_rule_text": "In the AXW needle roller thrust bearings with centring flange, AXW 15 denotes the spigot-centred execution: the flange seats in a matching housing register so the needle set stays concentric without piloting on the shaft, and the opposite raceway is a separate LS/AS washer or a hardened machine face. In AXW 15 the 15 selects the shaft clearance, while the built-in 21 mm spigot (B1 3.5 mm high) locates in a housing register; the opposing raceway stays a separately ordered LS/AS washer. The integrated washer carries a 21 mm centring spigot (3.5 mm flange height) that locates the whole unit in a matching housing register bore — the 15 mm bore clears the shaft and does no radial piloting. One direction only: AXW 15 cannot be reversed to take opposite thrust — mirror a second bearing for reversing shafts, and keep housing and shaft seats square within the ISO 104 tolerances. Mounting: locate the 21 mm spigot in the housing register bore (at least 3.5 mm deep), pass the 15 mm bore over the shaft without forcing a pilot fit, and fit a separate LS/AS washer or a hardened 58–64 HRC face on the opposite side.", "applications": [ "material-handling swivel joints using the spigot as a built-in housing pilot", "transmission shafts where a one-piece spigot-centred thrust unit replaces a loose cage-and-washer stack at the housing register", "automotive selector and shift mechanisms needing a pre-centred flanged thrust support in a shallow housing bore", "agricultural gear drives assembled through a housing cover, where the spigot keeps the needle set concentric until the cover is bolted" ], "failure_modes": [ "opposing-track scoring when the separate LS/AS washer or hardened 58–64 HRC face is missing or undersized", "roller skidding and raceway glazing once the thrust falls below the catalogue minimum axial load (factor A)", "instant raceway scoring when the assembly runs against a face below 58 HRC or with a rough finish", "hard-particle indentation where oil or grease filtration is inadequate" ], "pitfalls": [ "At 15 mm bore the 21 mm spigot lip is thin enough to bend with pliers — handle AXW 15 by the washer face, never by the flange.", "AXW is not an ISO-standardized interchangeable outline for every maker — check the 31×3.2 mm envelope and the 21 mm spigot before cross-brand substitution.", "The 10.4 kN rating still requires a hardened opposing face: the integrated washer is one raceway only, and the other track is a separate LS/AS washer or a 58–64 HRC machine face.", "The spigot pilots in the housing register, not on the shaft: turning the 15 mm bore into a tight pilot fit, or omitting the 21 mm register bore, defeats the centring function of AXW 15.", "the 4,800 r/min reference speed is the thermal criterion under load, limiting speed 9,500 r/min; the open needle set needs the housing to keep grit out.", "The 10.4/37.5 kN ratings and 10 g mass are SKF catalogue values transcribed from ch. 12.2 of PUB BU/P1 17000 (PDF table page 912); mounting data — Ea/Eb raceway diameters, the flange register and the load factor — appears in the running text because the structured record carries the boundary envelope only." ], "faq": [ { "q": "How is the AXW 15 designation read?", "a": "AXW marks the spigot-flanged needle roller thrust bearing and 15 is the bore in millimetres; the series plan fixes the 31 mm OD and 3.2 mm overall height, D1 21 mm is the spigot, and the AXK 1528 needle set runs inside." }, { "q": "Does the AXW 15 still need hardened faces?", "a": "The integrated spigot washer is one hardened raceway, but the opposing face is the application's responsibility — fit a separate LS/AS washer or harden it to 58–64 HRC over Ea 17–Eb 27 mm." }, { "q": "How is an AXW bearing mounted?", "a": "Locate the 21 mm spigot in the housing register bore, pass the 15 mm bore over the shaft without a pilot fit, fit a separate LS/AS washer or a 58–64 HRC face on the opposite side, and press via the washer back only." }, { "q": "What are the dimensions and ratings of the AXW 15?", "a": "A AXW 15 measures 15 mm bore × 31 mm outside diameter × 3.2 mm width (0.591 × 1.22 × 0.126 in). From SKF catalogue PUB BU/P1 17000: dynamic C 10.4 kN, static C0 37.5 kN, fatigue limit Pu 4.3 kN, reference speed 4,800 r/min, limiting speed 9,500 r/min, mass about 10 g. Centring spigot D1 21 mm, spigot height B1 3.5 mm, contact band Ea 17–27 mm." } ], "cross_ref": [ { "equiv_sku": "AXW15", "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://www.skf.com/group/products/rolling-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.2 needle roller thrust bearings with a centring flange", "extracted_at": "2026-09-27", "last_verified": "2026-09-27", "confidence_score": 0.7, "status": "published", "aliases": [ "AXW15", "AXW 15" ], "locale_variants": {} }, { "sku": "AXW20", "brand": "SKF", "manufacturer_designation": "AXW 20", "series": "AXW-series", "type": "needle_roller_thrust", "d_mm": 20, "D_mm": 38, "B_mm": 3.2, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 12, "static_load_kN": 47.5, "fatigue_load_limit_kN": 5.6, "reference_speed_rpm": 4300, "limiting_speed_rpm": 8500, "max_rpm": 8500, "weight_g": 14, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 3031", "naming_rule_text": "SKF lists AXW 20 in SKF catalogue PUB BU/P1 17000 ch. 12.2: the 3.5 mm high, 26 mm diameter spigot centres the bearing radially in the housing while the needle set takes one-direction thrust of 12 kN. In AXW 20 the 20 selects the shaft clearance, while the built-in 26 mm spigot (B1 3.5 mm high) locates in a housing register; the opposing raceway stays a separately ordered LS/AS washer. The integrated washer carries a 26 mm centring spigot (3.5 mm flange height) that locates the whole unit in a matching housing register bore — the 20 mm bore clears the shaft and does no radial piloting. One direction only: AXW 20 cannot be reversed to take opposite thrust — mirror a second bearing for reversing shafts, and keep housing and shaft seats square within the ISO 104 tolerances. Because the spigot sets concentricity, the shaft fit relaxes versus a piloted washer; still harden or washer-face the opposite track to 58–64 HRC across the 22–34 mm contact band.", "applications": [ "material-handling swivel joints using the spigot as a built-in housing pilot", "transmission shafts where a one-piece spigot-centred thrust unit replaces a loose cage-and-washer stack at the housing register", "automotive selector and shift mechanisms needing a pre-centred flanged thrust support in a shallow housing bore", "agricultural gear drives assembled through a housing cover, where the spigot keeps the needle set concentric until the cover is bolted" ], "failure_modes": [ "opposing-track scoring when the separate LS/AS washer or hardened 58–64 HRC face is missing or undersized", "roller skidding and raceway glazing once the thrust falls below the catalogue minimum axial load (factor A)", "needle-row denting from a single hard particle trapped in the 2 mm section", "condensation pitting in machines that run intermittently in humid environments" ], "pitfalls": [ "On a 20 mm shaft the register fit decides concentricity: a loose or oversize 26 mm register bore lets the 3.2 mm needle set orbit, wearing a groove in both tracks.", "The 12 kN rating still requires a hardened opposing face: the integrated washer is one raceway only, and the other track is a separate LS/AS washer or a 58–64 HRC machine face.", "the 4,300 r/min reference speed is the thermal criterion under load, limiting speed 8,500 r/min; the open needle set needs the housing to keep grit out.", "The spigot pilots in the housing register, not on the shaft: turning the 20 mm bore into a tight pilot fit, or omitting the 26 mm register bore, defeats the centring function of AXW 20.", "AXW is not an ISO-standardized interchangeable outline for every maker — check the 38×3.2 mm envelope and the 26 mm spigot before cross-brand substitution.", "The 12/47.5 kN ratings and 14 g mass are SKF catalogue values transcribed from ch. 12.2 of PUB BU/P1 17000 (PDF table page 912); mounting data — Ea/Eb raceway diameters, the flange register and the load factor — appears in the running text because the structured record carries the boundary envelope only." ], "faq": [ { "q": "How is an AXW bearing mounted?", "a": "Locate the 26 mm spigot in the housing register bore, pass the 20 mm bore over the shaft without a pilot fit, fit a separate LS/AS washer or a 58–64 HRC face on the opposite side, and press via the washer back only." }, { "q": "What are the dimensions and ratings of the AXW 20?", "a": "A AXW 20 measures 20 mm bore × 38 mm outside diameter × 3.2 mm width (0.787 × 1.496 × 0.126 in). From SKF catalogue PUB BU/P1 17000: dynamic C 12 kN, static C0 47.5 kN, fatigue limit Pu 5.6 kN, reference speed 4,300 r/min, limiting speed 8,500 r/min, mass about 14 g. Centring spigot D1 26 mm, spigot height B1 3.5 mm, contact band Ea 22–34 mm." }, { "q": "What is the centring spigot on the AXW 20 for?", "a": "The 26 mm diameter, 3.5 mm high spigot locates the bearing in a matching housing register and centres the needle set radially; it does not pilot on the 20 mm shaft." }, { "q": "How is the AXW 20 designation read?", "a": "AXW marks the spigot-flanged needle roller thrust bearing and 20 is the bore in millimetres; the series plan fixes the 38 mm OD and 3.2 mm overall height, D1 26 mm is the spigot, and the AXK 2035 needle set runs inside." } ], "cross_ref": [ { "equiv_sku": "AXW20", "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://www.skf.com/group/products/rolling-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.2 needle roller thrust bearings with a centring flange", "extracted_at": "2026-09-27", "last_verified": "2026-09-27", "confidence_score": 0.7, "status": "published", "aliases": [ "AXW20", "AXW 20" ], "locale_variants": {} }, { "sku": "AXW25", "brand": "SKF", "manufacturer_designation": "AXW 25", "series": "AXW-series", "type": "needle_roller_thrust", "d_mm": 25, "D_mm": 45, "B_mm": 3.2, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 13.4, "static_load_kN": 60, "fatigue_load_limit_kN": 6.95, "reference_speed_rpm": 3800, "limiting_speed_rpm": 7500, "max_rpm": 7500, "weight_g": 20, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 3031", "naming_rule_text": "SKF lists AXW 25 in SKF catalogue PUB BU/P1 17000 ch. 12.2: the 4 mm high, 32 mm diameter spigot centres the bearing radially in the housing while the needle set takes one-direction thrust of 13.4 kN. AXW numbering gives the bore directly (25 mm for AXW 25); the needle set inside is the AXK 2542 track with 13.4 kN dynamic rating. The integrated washer carries a 32 mm centring spigot (4 mm flange height) that locates the whole unit in a matching housing register bore — the 25 mm bore clears the shaft and does no radial piloting. One direction only: AXW 25 cannot be reversed to take opposite thrust — mirror a second bearing for reversing shafts, and keep housing and shaft seats square within the ISO 104 tolerances. Because the spigot sets concentricity, the shaft fit relaxes versus a piloted washer; still harden or washer-face the opposite track to 58–64 HRC across the 29–41 mm contact band.", "applications": [ "material-handling swivel joints using the spigot as a built-in housing pilot", "transmission shafts where a one-piece spigot-centred thrust unit replaces a loose cage-and-washer stack at the housing register", "automotive selector and shift mechanisms needing a pre-centred flanged thrust support in a shallow housing bore", "agricultural gear drives assembled through a housing cover, where the spigot keeps the needle set concentric until the cover is bolted" ], "failure_modes": [ "centring-spigot fretting in a loose register bore until the needle set runs eccentric", "cage wear from rollers being dragged through unloaded zones under fluctuating thrust", "edge loading across the needle crowns when the mating faces are not square to the shaft", "false brinelling and rust-red witness marks on standby machines under external vibration" ], "pitfalls": [ "On a 25 mm shaft the register fit decides concentricity: a loose or oversize 32 mm register bore lets the 3.2 mm needle set orbit, wearing a groove in both tracks.", "The 13.4 kN rating still requires a hardened opposing face: the integrated washer is one raceway only, and the other track is a separate LS/AS washer or a 58–64 HRC machine face.", "the 3,800 r/min reference speed is the thermal criterion under load, limiting speed 7,500 r/min; the open needle set needs the housing to keep grit out.", "The spigot pilots in the housing register, not on the shaft: turning the 25 mm bore into a tight pilot fit, or omitting the 32 mm register bore, defeats the centring function of AXW 25.", "AXW is not an ISO-standardized interchangeable outline for every maker — check the 45×3.2 mm envelope and the 32 mm spigot before cross-brand substitution.", "The 13.4/60 kN ratings and 20 g mass are SKF catalogue values transcribed from ch. 12.2 of PUB BU/P1 17000 (PDF table page 912); mounting data — Ea/Eb raceway diameters, the flange register and the load factor — appears in the running text because the structured record carries the boundary envelope only." ], "faq": [ { "q": "What are the common mounting mistakes?", "a": "Pressing on the spigot lip, boring no register (or a wrong-size 32 mm register) in the housing, forcing the 25 mm bore into a pilot fit, leaving the opposite face soft, or skipping grease in the 3.2 mm section — each shows up as cage or track damage within hours." }, { "q": "Which dimensions does the AXW 25 have?", "a": "A AXW 25 measures 25 mm bore × 45 mm outside diameter × 3.2 mm width (0.984 × 1.772 × 0.126 in). From SKF catalogue PUB BU/P1 17000: dynamic C 13.4 kN, static C0 60 kN, fatigue limit Pu 6.95 kN, reference speed 3,800 r/min, limiting speed 7,500 r/min, mass about 20 g. Centring spigot D1 32 mm, spigot height B1 4 mm, contact band Ea 29–41 mm." }, { "q": "What does AXW mean versus AXK?", "a": "AXW pairs an AXK needle set with a washer that has an integral centring spigot — the spigot locates in a housing register and keeps the set concentric as one part; AXK is the bare cage needing two separate washers. A separate LS/AS washer or hardened face is still required opposite, and the outline is not multi-brand interchangeable." }, { "q": "Can the AXW 25 take radial load?", "a": "No. The spigot is a locating pilot, not a radial bearing: the needle set carries one-direction thrust (13.4 kN dynamic) and the shaft arrangement carries all radial force." } ], "cross_ref": [ { "equiv_sku": "AXW25", "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://www.skf.com/group/products/rolling-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.2 needle roller thrust bearings with a centring flange", "extracted_at": "2026-09-27", "last_verified": "2026-09-27", "confidence_score": 0.7, "status": "published", "aliases": [ "AXW25", "AXW 25" ], "locale_variants": {} }, { "sku": "AXW30", "brand": "SKF", "manufacturer_designation": "AXW 30", "series": "AXW-series", "type": "needle_roller_thrust", "d_mm": 30, "D_mm": 50, "B_mm": 3.2, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 15, "static_load_kN": 72, "fatigue_load_limit_kN": 8.3, "reference_speed_rpm": 3600, "limiting_speed_rpm": 7000, "max_rpm": 7000, "weight_g": 22, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 3031", "naming_rule_text": "AXW 30 is the assembly-friendly pairing of an AXK 3047 cage with a spigot washer: cage and washer arrive pre-centred as one part at 30×50 mm, 3.2 mm total height. AXW numbering gives the bore directly (30 mm for AXW 30); the needle set inside is the AXK 3047 track with 15 kN dynamic rating. The integrated washer carries a 37 mm centring spigot (4 mm flange height) that locates the whole unit in a matching housing register bore — the 30 mm bore clears the shaft and does no radial piloting. One direction only: AXW 30 cannot be reversed to take opposite thrust — mirror a second bearing for reversing shafts, and keep housing and shaft seats square within the ISO 104 tolerances. Press only on the washer back — never on the spigot lip or through the needle cage — keep the register free of burrs, and verify the unit turns without the flange rubbing its register.", "applications": [ "material-handling swivel joints using the spigot as a built-in housing pilot", "transmission shafts where a one-piece spigot-centred thrust unit replaces a loose cage-and-washer stack at the housing register", "automotive selector and shift mechanisms needing a pre-centred flanged thrust support in a shallow housing bore", "agricultural gear drives assembled through a housing cover, where the spigot keeps the needle set concentric until the cover is bolted" ], "failure_modes": [ "centring-spigot fretting in a loose register bore until the needle set runs eccentric", "cage wear from rollers being dragged through unloaded zones under fluctuating thrust", "instant raceway scoring when the assembly runs against a face below 58 HRC or with a rough finish", "electrical erosion of raceways on VFD-driven shafts without grounding or insulation" ], "pitfalls": [ "On a 30 mm shaft the register fit decides concentricity: a loose or oversize 37 mm register bore lets the 3.2 mm needle set orbit, wearing a groove in both tracks.", "the 3,600 r/min reference speed is the thermal criterion under load, limiting speed 7,000 r/min; the open needle set needs the housing to keep grit out.", "One-direction thrust: reversing force dumps the needles off the 46 mm outer track — mirror a second spigot-flanged unit where the load reverses.", "The spigot pilots in the housing register, not on the shaft: turning the 30 mm bore into a tight pilot fit, or omitting the 37 mm register bore, defeats the centring function of AXW 30.", "AXW is not an ISO-standardized interchangeable outline for every maker — check the 50×3.2 mm envelope and the 37 mm spigot before cross-brand substitution.", "The 15/72 kN ratings and 22 g mass are SKF catalogue values transcribed from ch. 12.2 of PUB BU/P1 17000 (PDF table page 912); mounting data — Ea/Eb raceway diameters, the flange register and the load factor — appears in the running text because the structured record carries the boundary envelope only." ], "faq": [ { "q": "What does AXW mean versus AXK?", "a": "AXW pairs an AXK needle set with a washer that has an integral centring spigot — the spigot locates in a housing register and keeps the set concentric as one part; AXK is the bare cage needing two separate washers. A separate LS/AS washer or hardened face is still required opposite, and the outline is not multi-brand interchangeable." }, { "q": "Can the AXW 30 take radial load?", "a": "No. The spigot is a locating pilot, not a radial bearing: the needle set carries one-direction thrust (15 kN dynamic) and the shaft arrangement carries all radial force." }, { "q": "Does the AXW 30 run in both axial directions?", "a": "No — one direction only. Reversing thrust lifts the needles off the 46 mm outer track; mirror a second spigot-flanged unit for reversing shafts." }, { "q": "What are the common mounting mistakes?", "a": "Pressing on the spigot lip, boring no register (or a wrong-size 37 mm register) in the housing, forcing the 30 mm bore into a pilot fit, leaving the opposite face soft, or skipping grease in the 3.2 mm section — each shows up as cage or track damage within hours." } ], "cross_ref": [ { "equiv_sku": "AXW30", "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://www.skf.com/group/products/rolling-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.2 needle roller thrust bearings with a centring flange", "extracted_at": "2026-09-27", "last_verified": "2026-09-27", "confidence_score": 0.7, "status": "published", "aliases": [ "AXW30", "AXW 30" ], "locale_variants": {} }, { "sku": "AXW35", "brand": "SKF", "manufacturer_designation": "AXW 35", "series": "AXW-series", "type": "needle_roller_thrust", "d_mm": 35, "D_mm": 55, "B_mm": 3.2, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 16.6, "static_load_kN": 83, "fatigue_load_limit_kN": 9.8, "reference_speed_rpm": 3200, "limiting_speed_rpm": 6300, "max_rpm": 6300, "weight_g": 27, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 3031", "naming_rule_text": "AXW 35 is the assembly-friendly pairing of an AXK 3552 cage with a spigot washer: cage and washer arrive pre-centred as one part at 35×55 mm, 3.2 mm total height. The designation AXW 35 reads as flanged (AXW) needle thrust for a 35 mm shaft — the spigot pilots in the 42 mm housing register, not on the shaft. The integrated washer carries a 42 mm centring spigot (4 mm flange height) that locates the whole unit in a matching housing register bore — the 35 mm bore clears the shaft and does no radial piloting. One direction only: AXW 35 cannot be reversed to take opposite thrust — mirror a second bearing for reversing shafts, and keep housing and shaft seats square within the ISO 104 tolerances. Press only on the washer back — never on the spigot lip or through the needle cage — keep the register free of burrs, and verify the unit turns without the flange rubbing its register.", "applications": [ "material-handling swivel joints using the spigot as a built-in housing pilot", "transmission shafts where a one-piece spigot-centred thrust unit replaces a loose cage-and-washer stack at the housing register", "automotive selector and shift mechanisms needing a pre-centred flanged thrust support in a shallow housing bore", "agricultural gear drives assembled through a housing cover, where the spigot keeps the needle set concentric until the cover is bolted" ], "failure_modes": [ "spigot lip deformation after a hammer blow or cocked assembly at fitting", "smearing at roller-raceway contacts during unloaded startup before the oil film or preload is established", "needle-row denting from a single hard particle trapped in the 2 mm section", "brinelling of washer raceways from impact or mounting force applied through the rolling elements" ], "pitfalls": [ "At 35 mm, verify the opposite raceway face — the integrated spigot washer supplies one side only; a soft face or missing LS/AS washer on the other ribs within months.", "the 3,200 r/min reference speed is the thermal criterion under load, limiting speed 6,300 r/min; the open needle set needs the housing to keep grit out.", "One-direction thrust: reversing force dumps the needles off the 51 mm outer track — mirror a second spigot-flanged unit where the load reverses.", "The spigot pilots in the housing register, not on the shaft: turning the 35 mm bore into a tight pilot fit, or omitting the 42 mm register bore, defeats the centring function of AXW 35.", "AXW is not an ISO-standardized interchangeable outline for every maker — check the 55×3.2 mm envelope and the 42 mm spigot before cross-brand substitution.", "The 16.6/83 kN ratings and 27 g mass are SKF catalogue values transcribed from ch. 12.2 of PUB BU/P1 17000 (PDF table page 912); mounting data — Ea/Eb raceway diameters, the flange register and the load factor — appears in the running text because the structured record carries the boundary envelope only." ], "faq": [ { "q": "What is the centring spigot on the AXW 35 for?", "a": "The 42 mm diameter, 4 mm high spigot locates the bearing in a matching housing register and centres the needle set radially; it does not pilot on the 35 mm shaft." }, { "q": "How is the AXW 35 designation read?", "a": "AXW marks the spigot-flanged needle roller thrust bearing and 35 is the bore in millimetres; the series plan fixes the 55 mm OD and 3.2 mm overall height, D1 42 mm is the spigot, and the AXK 3552 needle set runs inside." }, { "q": "Does the AXW 35 still need hardened faces?", "a": "The integrated spigot washer is one hardened raceway, but the opposing face is the application's responsibility — fit a separate LS/AS washer or harden it to 58–64 HRC over Ea 39–Eb 51 mm." }, { "q": "How is an AXW bearing mounted?", "a": "Locate the 42 mm spigot in the housing register bore, pass the 35 mm bore over the shaft without a pilot fit, fit a separate LS/AS washer or a 58–64 HRC face on the opposite side, and press via the washer back only." } ], "cross_ref": [ { "equiv_sku": "AXW35", "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://www.skf.com/group/products/rolling-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.2 needle roller thrust bearings with a centring flange", "extracted_at": "2026-09-27", "last_verified": "2026-09-27", "confidence_score": 0.7, "status": "published", "aliases": [ "AXW35", "AXW 35" ], "locale_variants": {} }, { "sku": "AXW40", "brand": "SKF", "manufacturer_designation": "AXW 40", "series": "AXW-series", "type": "needle_roller_thrust", "d_mm": 40, "D_mm": 63, "B_mm": 4.2, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 25, "static_load_kN": 114, "fatigue_load_limit_kN": 13.7, "reference_speed_rpm": 2800, "limiting_speed_rpm": 5600, "max_rpm": 5600, "weight_g": 39, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 3031", "naming_rule_text": "The flanged thrust bearing AXW 40 combines a 40 mm bore, a 63 mm outer track and a 47 mm centring spigot in one 4.2 mm high unit; the needle contact runs 45–58 mm and the rating is 25 kN dynamic. The designation AXW 40 reads as flanged (AXW) needle thrust for a 40 mm shaft — the spigot pilots in the 47 mm housing register, not on the shaft. The integrated washer carries a 47 mm centring spigot (4 mm flange height) that locates the whole unit in a matching housing register bore — the 40 mm bore clears the shaft and does no radial piloting. One direction only: AXW 40 cannot be reversed to take opposite thrust — mirror a second bearing for reversing shafts, and keep housing and shaft seats square within the ISO 104 tolerances. Mounting: locate the 47 mm spigot in the housing register bore (at least 4 mm deep), pass the 40 mm bore over the shaft without forcing a pilot fit, and fit a separate LS/AS washer or a hardened 58–64 HRC face on the opposite side.", "applications": [ "material-handling swivel joints using the spigot as a built-in housing pilot", "transmission shafts where a one-piece spigot-centred thrust unit replaces a loose cage-and-washer stack at the housing register", "automotive selector and shift mechanisms needing a pre-centred flanged thrust support in a shallow housing bore", "agricultural gear drives assembled through a housing cover, where the spigot keeps the needle set concentric until the cover is bolted" ], "failure_modes": [ "spigot lip deformation after a hammer blow or cocked assembly at fitting", "smearing at roller-raceway contacts during unloaded startup before the oil film or preload is established", "edge loading across the needle crowns when the mating faces are not square to the shaft", "hard-particle indentation where oil or grease filtration is inadequate" ], "pitfalls": [ "At 40 mm, verify the opposite raceway face — the integrated spigot washer supplies one side only; a soft face or missing LS/AS washer on the other ribs within months.", "One-direction thrust: reversing force dumps the needles off the 58 mm outer track — mirror a second spigot-flanged unit where the load reverses.", "The spigot pilots in the housing register, not on the shaft: turning the 40 mm bore into a tight pilot fit, or omitting the 47 mm register bore, defeats the centring function of AXW 40.", "AXW is not an ISO-standardized interchangeable outline for every maker — check the 63×4.2 mm envelope and the 47 mm spigot before cross-brand substitution.", "The 25 kN rating still requires a hardened opposing face: the integrated washer is one raceway only, and the other track is a separate LS/AS washer or a 58–64 HRC machine face.", "The 25/114 kN ratings and 39 g mass are SKF catalogue values transcribed from ch. 12.2 of PUB BU/P1 17000 (PDF table page 912); mounting data — Ea/Eb raceway diameters, the flange register and the load factor — appears in the running text because the structured record carries the boundary envelope only." ], "faq": [ { "q": "Does the AXW 40 still need hardened faces?", "a": "The integrated spigot washer is one hardened raceway, but the opposing face is the application's responsibility — fit a separate LS/AS washer or harden it to 58–64 HRC over Ea 45–Eb 58 mm." }, { "q": "How is an AXW bearing mounted?", "a": "Locate the 47 mm spigot in the housing register bore, pass the 40 mm bore over the shaft without a pilot fit, fit a separate LS/AS washer or a 58–64 HRC face on the opposite side, and press via the washer back only." }, { "q": "What are the dimensions and ratings of the AXW 40?", "a": "A AXW 40 measures 40 mm bore × 63 mm outside diameter × 4.2 mm width (1.575 × 2.48 × 0.165 in). From SKF catalogue PUB BU/P1 17000: dynamic C 25 kN, static C0 114 kN, fatigue limit Pu 13.7 kN, reference speed 2,800 r/min, limiting speed 5,600 r/min, mass about 39 g. Centring spigot D1 47 mm, spigot height B1 4 mm, contact band Ea 45–58 mm." }, { "q": "What is the centring spigot on the AXW 40 for?", "a": "The 47 mm diameter, 4 mm high spigot locates the bearing in a matching housing register and centres the needle set radially; it does not pilot on the 40 mm shaft." } ], "cross_ref": [ { "equiv_sku": "AXW40", "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://www.skf.com/group/products/rolling-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.2 needle roller thrust bearings with a centring flange", "extracted_at": "2026-09-27", "last_verified": "2026-09-27", "confidence_score": 0.7, "status": "published", "aliases": [ "AXW40", "AXW 40" ], "locale_variants": {} }, { "sku": "AXW45", "brand": "SKF", "manufacturer_designation": "AXW 45", "series": "AXW-series", "type": "needle_roller_thrust", "d_mm": 45, "D_mm": 68, "B_mm": 4.2, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 27, "static_load_kN": 127, "fatigue_load_limit_kN": 15.3, "reference_speed_rpm": 2600, "limiting_speed_rpm": 5300, "max_rpm": 5300, "weight_g": 43, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 3031", "naming_rule_text": "The flanged thrust bearing AXW 45 combines a 45 mm bore, a 68 mm outer track and a 52 mm centring spigot in one 4.2 mm high unit; the needle contact runs 50–63 mm and the rating is 27 kN dynamic. Reading the code: AXW marks the spigot-flanged needle roller thrust bearing and the figure 45 gives the bore in millimetres; the 68 mm OD and 4.2 mm height follow the series plan, and D1 52 mm is the spigot diameter. The integrated washer carries a 52 mm centring spigot (4 mm flange height) that locates the whole unit in a matching housing register bore — the 45 mm bore clears the shaft and does no radial piloting. One direction only: AXW 45 cannot be reversed to take opposite thrust — mirror a second bearing for reversing shafts, and keep housing and shaft seats square within the ISO 104 tolerances. Mounting: locate the 52 mm spigot in the housing register bore (at least 4 mm deep), pass the 45 mm bore over the shaft without forcing a pilot fit, and fit a separate LS/AS washer or a hardened 58–64 HRC face on the opposite side.", "applications": [ "material-handling swivel joints using the spigot as a built-in housing pilot", "transmission shafts where a one-piece spigot-centred thrust unit replaces a loose cage-and-washer stack at the housing register", "automotive selector and shift mechanisms needing a pre-centred flanged thrust support in a shallow housing bore", "agricultural gear drives assembled through a housing cover, where the spigot keeps the needle set concentric until the cover is bolted" ], "failure_modes": [ "opposing-track scoring when the separate LS/AS washer or hardened 58–64 HRC face is missing or undersized", "roller skidding and raceway glazing once the thrust falls below the catalogue minimum axial load (factor A)", "instant raceway scoring when the assembly runs against a face below 58 HRC or with a rough finish", "rolling-contact fatigue spalling after the catalogue L10 life is exhausted" ], "pitfalls": [ "At 45 mm, verify the opposite raceway face — the integrated spigot washer supplies one side only; a soft face or missing LS/AS washer on the other ribs within months.", "One-direction thrust: reversing force dumps the needles off the 63 mm outer track — mirror a second spigot-flanged unit where the load reverses.", "The spigot pilots in the housing register, not on the shaft: turning the 45 mm bore into a tight pilot fit, or omitting the 52 mm register bore, defeats the centring function of AXW 45.", "AXW is not an ISO-standardized interchangeable outline for every maker — check the 68×4.2 mm envelope and the 52 mm spigot before cross-brand substitution.", "The 27 kN rating still requires a hardened opposing face: the integrated washer is one raceway only, and the other track is a separate LS/AS washer or a 58–64 HRC machine face.", "The 27/127 kN ratings and 43 g mass are SKF catalogue values transcribed from ch. 12.2 of PUB BU/P1 17000 (PDF table page 912); mounting data — Ea/Eb raceway diameters, the flange register and the load factor — appears in the running text because the structured record carries the boundary envelope only." ], "faq": [ { "q": "Does the AXW 45 run in both axial directions?", "a": "No — one direction only. Reversing thrust lifts the needles off the 63 mm outer track; mirror a second spigot-flanged unit for reversing shafts." }, { "q": "What are the common mounting mistakes?", "a": "Pressing on the spigot lip, boring no register (or a wrong-size 52 mm register) in the housing, forcing the 45 mm bore into a pilot fit, leaving the opposite face soft, or skipping grease in the 4.2 mm section — each shows up as cage or track damage within hours." }, { "q": "Which dimensions does the AXW 45 have?", "a": "A AXW 45 measures 45 mm bore × 68 mm outside diameter × 4.2 mm width (1.772 × 2.677 × 0.165 in). From SKF catalogue PUB BU/P1 17000: dynamic C 27 kN, static C0 127 kN, fatigue limit Pu 15.3 kN, reference speed 2,600 r/min, limiting speed 5,300 r/min, mass about 43 g. Centring spigot D1 52 mm, spigot height B1 4 mm, contact band Ea 50–63 mm." }, { "q": "What does AXW mean versus AXK?", "a": "AXW pairs an AXK needle set with a washer that has an integral centring spigot — the spigot locates in a housing register and keeps the set concentric as one part; AXK is the bare cage needing two separate washers. A separate LS/AS washer or hardened face is still required opposite, and the outline is not multi-brand interchangeable." } ], "cross_ref": [ { "equiv_sku": "AXW45", "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://www.skf.com/group/products/rolling-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.2 needle roller thrust bearings with a centring flange", "extracted_at": "2026-09-27", "last_verified": "2026-09-27", "confidence_score": 0.7, "status": "published", "aliases": [ "AXW45", "AXW 45" ], "locale_variants": {} } ]