[ { "sku": "23176-CAK-W33", "brand": "SKF", "manufacturer_designation": "SKF 23176 CAK/W33", "series": "23100-series", "type": "spherical_roller", "d_mm": 380, "D_mm": 620, "B_mm": 194, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "brass_machined_M1", "dynamic_load_kN": 4561, "static_load_kN": 7100, "fatigue_load_limit_kN": 500, "max_rpm": 1000, "reference_speed_rpm": 560, "limiting_speed_rpm": 1000, "weight_g": 275000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The SKF 23176 CAK/W33 is a 380×620×194 mm spherical roller bearing with a 1:12 tapered bore — SKF catalogue execution for sleeve mounting on a 380 mm plain shaft, retaining the double-row self-aligning barrel-roller design. Digit by digit, 23176-cak-w33 reads as bearing type 2 (spherical roller, two barrel-roller rows), dimension series 31, and bore reference 76 resolving to 380 mm; 620 mm OD and 194 mm width are the matching ISO 15 boundary values. The K in the designation marks the 1:12 tapered bore: SKF mounts it on an H-series adapter sleeve (with KM locknut and MB lock washer) on a plain commercial-grade shaft, or on an AH withdrawal sleeve where the bearing must abut a shaft shoulder. Speed planning uses two different ceilings: 560 r/min thermal reference and 1,000 r/min mechanical limiting speed. Because driving up the 1:12 taper consumes radial clearance, K executions are commonly ordered with C3 initial clearance so the residual running clearance after mounting matches the cylindrical-bore 23176-cak-w33 on an interference seat.", "applications": [ "large mining crusher main shafts", "wind-turbine main shaft support", "fan and pulley shafts that need periodic bearing removal in the field", "shafting produced to commercial tolerances, where the adapter sleeve supplies the precision seat" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "sleeve seizure and shaft seat damage from omitting the anti-seize film between withdrawal sleeve and journal before drive-up", "roller-end scoring from starved lubricant at start-up before the grease channel purges", "hard-particle indentation of the raceway in unfiltered oil or contaminated grease systems" ], "pitfalls": [ "At 380 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 23100-series series at 380 mm bore (620×194 mm) is the medium-OD wide envelope for heavy continuous duty; it is wider than a 222 bearing in the same OD class, so housing width and spacer stack must be re-checked before substitution.", "The adapter sleeve is selected by actual shaft diameter, not by the 380 mm nominal bearing bore: H-sleeve part numbers span a small diameter range, so two different shaft diameters can use the same 23176-cak-w33 with different sleeves.", "Never apply the drive-up or clearance-reduction figures for this 1:12 tapered 23176-cak-w33 to a bearing of the other taper (1:12 vs 1:30); the steeper taper moves far less clearance per nut turn and the targets come from different catalogue tables.", "Shaft and housing fillets must clear the bearing chamfer so the 194 mm-wide rings seat square; use an undercut or withdrawal groove rather than an oversized radius that locks on the ring face.", "The 4561/7100 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 23176 CAK/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 23176-cak-w33?", "a": "The SKF 23176 CAK/W33 is a double-row spherical roller bearing with a 1:12 tapered bore, 380 mm nominal bore, 620 mm outer diameter and 194 mm width (14.961 × 24.409 × 7.638 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 4561 kN, C0 7100 kN, Pu 500 kN, reference speed 560 r/min, limiting speed 1,000 r/min, mass about 275000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K suffix mean on 23176-cak-w33?", "a": "K marks a 1:12 tapered bore for sleeve mounting — SKF writes EK or CCK(/W33), FAG writes -K- inside the suffix chain for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder. The rarer K30 suffix would instead mean a 1:30 taper; dimension series 40/41 spherical rollers commonly use it." }, { "q": "Which adapter sleeve fits the 23176-cak-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 380 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 23176-cak-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:12 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 23176-cak-w33 and 23176-cak-w33?", "a": "They share the ISO 15 envelope and the same 4561/7100 kN ratings, but 23176-cak-w33 has the 1:12 tapered bore for sleeve mounting on a plain shaft, while 23176-cak-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "23176", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:12) sleeve-mounted execution of 23176; identical ISO 15 envelope, fits OH3176 adapter sleeve on a 360 mm shaft." }, { "equiv_sku": "C3176-MB", "equiv_brand": "SKF", "level": "full", "note": "SKF CARB toroidal bearing C 3176 MB shares the 380×620×194 mm envelope with ratings within 10 %; it self-aligns but floats axially and cannot locate the shaft — locating/non-locating pair, not a substitute." }, { "equiv_sku": "C3176-KMB", "equiv_brand": "SKF", "level": "full", "note": "SKF CARB toroidal bearing C 3176 KMB shares the 380×620×194 mm envelope with ratings within 10 %; it self-aligns but floats axially and cannot locate the shaft — locating/non-locating pair, not a substitute." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.2 adapter-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "23176-CAK-W33", "SKF 23176 CAK/W33", "23176 K" ], "locale_variants": {} }, { "sku": "23276-CAK-W33", "brand": "SKF", "manufacturer_designation": "SKF 23276 CAK/W33", "series": "23200-series", "type": "spherical_roller", "d_mm": 380, "D_mm": 680, "B_mm": 240, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "brass_machined_M1", "dynamic_load_kN": 6126, "static_load_kN": 9150, "fatigue_load_limit_kN": 620, "max_rpm": 750, "reference_speed_rpm": 500, "limiting_speed_rpm": 750, "weight_g": 420000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "In SKF catalogue PUB BU/P1 17000, 23276-cak-w33 denotes the tapered-bore version (K suffix, taper 1:12) of the 23200-series spherical roller bearing: dimensioned 380×680×240 mm, it seats on an adapter or withdrawal sleeve rather than directly on a machined journal. Numbering ties the bearing to its envelope: 23276-cak-w33 means spherical-roller type, dimension series 32, 380 mm bore — which is why the 680×240 mm outline swaps dimensionally with other ISO 15 bearings of the same code. Reading the suffix on 23276-cak-w33, the K (or EK/CCK) element changes only the bore — 1:12 taper for sleeve mounting — while the rest of the suffix chain (CA machined-brass-cage design with W33 groove) keeps the same internal design, cage and W33 relubrication features as the cylindrical-bore 23276-cak-w33. Selection arithmetic: the C0/C ratio is about 1.49 (static 9150 kN against dynamic 6126 kN), typical of a spherical roller sized for heavy combined loads, and the 620 kN fatigue load limit Pu is the equivalent-load floor used in the life calculation. After drive-up, re-check radial clearance and then swing the outer ring through its self-aligning range: the sphered raceway of the 23276-cak-w33 must still tilt ≈ 0.5–2.5° freely — a joint that binds after sleeve mounting signals excessive drive-up or a cocked sleeve.", "applications": [ "SAG and ball-mill drive shafts", "large mining crusher main shafts", "stepped shafts fitted with withdrawal sleeves against a fixed shoulder", "fan and pulley shafts that need periodic bearing removal in the field" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "inner-ring circumferential cracking after over-drive on the tapered seat removes too much radial clearance and the bearing runs preloaded", "roller-end scoring from starved lubricant at start-up before the grease channel purges", "smearing on the roller-raceway contact during skid starts below the minimum load" ], "pitfalls": [ "At 380 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 23200-series series at 380 mm bore (680×240 mm) adds still more width for shock-loaded and vibratory loads; it does not interchange with a 231 bearing of the same bore because the 240 mm width changes abutment spacing, even though the 680 mm OD matches.", "Never apply the drive-up or clearance-reduction figures for this 1:12 tapered 23276-cak-w33 to a bearing of the other taper (1:12 vs 1:30); the steeper taper moves far less clearance per nut turn and the targets come from different catalogue tables.", "A loose sleeve after the first weeks of service usually means inadequate initial drive-up; re-checking clearance without dismounting is possible through the 240 mm-wide roller rows with feeler gauges — do not simply tighten the KM nut until vibration stops.", "Never use the tapered-bore EK/K variant's drive-up figures on this cylindrical-bore 23276-cak-w33; clearance reduction targets differ, and over-driving a cylindrical bore onto an oversized journal cracks the inner ring.", "The 6126/9150 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 23276 CAK/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 23276-cak-w33?", "a": "The SKF 23276 CAK/W33 is a double-row spherical roller bearing with a 1:12 tapered bore, 380 mm nominal bore, 680 mm outer diameter and 240 mm width (14.961 × 26.772 × 9.449 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 6126 kN, C0 9150 kN, Pu 620 kN, reference speed 500 r/min, limiting speed 750 r/min, mass about 420000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K suffix mean on 23276-cak-w33?", "a": "K marks a 1:12 tapered bore for sleeve mounting — SKF writes EK or CCK(/W33), FAG writes -K- inside the suffix chain for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder. The rarer K30 suffix would instead mean a 1:30 taper; dimension series 40/41 spherical rollers commonly use it." }, { "q": "Which adapter sleeve fits the 23276-cak-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 380 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 23276-cak-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:12 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 23276-cak-w33 and 23276-cak-w33?", "a": "They share the ISO 15 envelope and the same 6126/9150 kN ratings, but 23276-cak-w33 has the 1:12 tapered bore for sleeve mounting on a plain shaft, while 23276-cak-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "23276", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:12) sleeve-mounted execution of 23276; identical ISO 15 envelope, fits OH3276 adapter sleeve on a 360 mm shaft." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.2 adapter-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "23276-CAK-W33", "SKF 23276 CAK/W33", "23276 K" ], "locale_variants": {} }, { "sku": "23980-CCK-W33", "brand": "SKF", "manufacturer_designation": "SKF 23980 CCK/W33", "series": "23900-series", "type": "spherical_roller", "d_mm": 400, "D_mm": 540, "B_mm": 106, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 2038, "static_load_kN": 3900, "fatigue_load_limit_kN": 290, "max_rpm": 1200, "reference_speed_rpm": 1100, "limiting_speed_rpm": 1200, "weight_g": 100000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The SKF 23980 CCK/W33 is a 400×540×106 mm spherical roller bearing with a 1:12 tapered bore — SKF catalogue execution for sleeve mounting on a 400 mm plain shaft, retaining the double-row self-aligning barrel-roller design. Reading the designation: the leading 2 marks a spherical roller bearing, the 39 is the ISO 15 dimension series (dimension series 39 (compact OD, narrow)), and the last two digits encode the 400 mm bore; the 540 mm OD and 106 mm width follow the ISO 15 general plan. Reading the suffix on 23980-cck-w33, the K (or EK/CCK) element changes only the bore — 1:12 taper for sleeve mounting — while the rest of the suffix chain (CC cages with W33 groove) keeps the same internal design, cage and W33 relubrication features as the cylindrical-bore 23980-cc-w33. Catalogue mass 100000 g for the 400×540×106 mm open execution covers the two pressed-steel cages with a floating guide ring; tapered-bore and sealed variants differ in mass and carry their own order numbers. After drive-up, re-check radial clearance and then swing the outer ring through its self-aligning range: the sphered raceway of the 23980-cck-w33 must still tilt ≈ 0.5–2.5° freely — a joint that binds after sleeve mounting signals excessive drive-up or a cocked sleeve.", "applications": [ "large dredger and marine winch drums", "steel-plant continuous-caster segments", "shafting produced to commercial tolerances, where the adapter sleeve supplies the precision seat", "split-housing plummer block arrangements with bearings swapped in situ" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "fretting corrosion and sleeve-seat scoring when drive-up is insufficient and the tapered inner ring creeps on the adapter sleeve", "surface distress and smearing when the relubrication interval is exceeded — the W33 groove is only effective if grease actually reaches the roller rows", "smearing on the roller-raceway contact during skid starts below the minimum load" ], "pitfalls": [ "At 400 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 23900-series series at 400 mm bore (540×106 mm) is the slim-OD envelope: it buys radial space but gives up capacity against a 222-series bearing of the same bore — confirm the L10 margin before downsizing into it.", "The 23980-cck-w33 and its cylindrical-bore counterpart 23980-cc-w33 share envelope and load ratings (2038/3900 kN) but are not interchangeable in a housing already fitted for direct shaft mounting — the sleeve changes the assembly stack-up.", "The 23980-cck-w33 and its cylindrical-bore counterpart 23980-cc-w33 share envelope and load ratings (2038/3900 kN) but are not interchangeable in a housing already fitted for direct shaft mounting — the sleeve changes the assembly stack-up.", "The 100000 g mass and 106 mm width mean abutment faces must be square to the axis within the bearing's own P0 tolerance; a tilted spacer tilts the outer ring and concentrates load on one roller row of 23980-cck-w33.", "The 2038/3900 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 23980 CCK/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 23980-cck-w33?", "a": "The SKF 23980 CCK/W33 is a double-row spherical roller bearing with a 1:12 tapered bore, 400 mm nominal bore, 540 mm outer diameter and 106 mm width (15.748 × 21.26 × 4.173 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 2038 kN, C0 3900 kN, Pu 290 kN, reference speed 1,100 r/min, limiting speed 1,200 r/min, mass about 100000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K suffix mean on 23980-cck-w33?", "a": "K marks a 1:12 tapered bore for sleeve mounting — SKF writes EK or CCK(/W33), FAG writes -K- inside the suffix chain for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder. The rarer K30 suffix would instead mean a 1:30 taper; dimension series 40/41 spherical rollers commonly use it." }, { "q": "Which adapter sleeve fits the 23980-cck-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 400 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 23980-cck-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:12 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 23980-cck-w33 and 23980-cc-w33?", "a": "They share the ISO 15 envelope and the same 2038/3900 kN ratings, but 23980-cck-w33 has the 1:12 tapered bore for sleeve mounting on a plain shaft, while 23980-cc-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "23980", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:12) sleeve-mounted execution of 23980; identical ISO 15 envelope, fits OH3980 adapter sleeve on a 380 mm shaft." }, { "equiv_sku": "C3980-KM", "equiv_brand": "SKF", "level": "full", "note": "SKF CARB toroidal bearing C 3980 KM shares the 400×540×106 mm envelope with ratings within 10 %; it self-aligns but floats axially and cannot locate the shaft — locating/non-locating pair, not a substitute." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.2 adapter-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "23980-CCK-W33", "SKF 23980 CCK/W33", "23980 K" ], "locale_variants": {} }, { "sku": "23180-CAK-W33", "brand": "SKF", "manufacturer_designation": "SKF 23180 CAK/W33", "series": "23100-series", "type": "spherical_roller", "d_mm": 400, "D_mm": 650, "B_mm": 200, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "brass_machined_M1", "dynamic_load_kN": 4864, "static_load_kN": 7650, "fatigue_load_limit_kN": 530, "max_rpm": 950, "reference_speed_rpm": 530, "limiting_speed_rpm": 950, "weight_g": 325000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "For sleeve mounting on a 400 mm shaft, SKF order number SKF 23180 CAK/W33 is the 1:12 tapered-bore spherical roller bearing in the 23100-series family (dimension series 31 (medium OD, wide)); the cylindrical-bore equivalent is a separate order number, 23180-cak-w33. The code breaks down as type digit 2 (double-row spherical roller), dimension series 31 (dimension series 31 (medium OD, wide)), and bore code 80 = 400 mm; dimensions 400×650×200 mm therefore match the ISO 15 envelope. Reading the suffix on 23180-cak-w33, the K (or EK/CCK) element changes only the bore — 1:12 taper for sleeve mounting — while the rest of the suffix chain (CA machined-brass-cage design with W33 groove) keeps the same internal design, cage and W33 relubrication features as the cylindrical-bore 23180-cak-w33. Catalogue mass 325000 g for the 400×650×200 mm open execution covers the a one-piece machined brass cage guided on the inner ring (CA design); tapered-bore and sealed variants differ in mass and carry their own order numbers. Because driving up the 1:12 taper consumes radial clearance, K executions are commonly ordered with C3 initial clearance so the residual running clearance after mounting matches the cylindrical-bore 23180-cak-w33 on an interference seat.", "applications": [ "large dredger and marine winch drums", "steel-plant continuous-caster segments", "heavy crusher and screen shafts mounted and dismounted with hydraulic nuts", "long through-shafts in conveyors, where a sleeve seat avoids a precision journal" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "sleeve seizure and shaft seat damage from omitting the anti-seize film between withdrawal sleeve and journal before drive-up", "roller-end scoring from starved lubricant at start-up before the grease channel purges", "smearing on the roller-raceway contact during skid starts below the minimum load" ], "pitfalls": [ "At 400 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 23100-series series at 400 mm bore (650×200 mm) is the medium-OD wide envelope for heavy continuous duty; it is wider than a 222 bearing in the same OD class, so housing width and spacer stack must be re-checked before substitution.", "The 23180-cak-w33 and its cylindrical-bore counterpart 23180-cak-w33 share envelope and load ratings (4864/7650 kN) but are not interchangeable in a housing already fitted for direct shaft mounting — the sleeve changes the assembly stack-up.", "A loose sleeve after the first weeks of service usually means inadequate initial drive-up; re-checking clearance without dismounting is possible through the 200 mm-wide roller rows with feeler gauges — do not simply tighten the KM nut until vibration stops.", "Open spherical roller bearings rely on the housing seals; in screening or crusher duty a failed seal lets grit into the sphered raceway and the 23180-cak-w33 pits long before its L10 life.", "The 4864/7650 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 23180 CAK/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 23180-cak-w33?", "a": "The SKF 23180 CAK/W33 is a double-row spherical roller bearing with a 1:12 tapered bore, 400 mm nominal bore, 650 mm outer diameter and 200 mm width (15.748 × 25.591 × 7.874 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 4864 kN, C0 7650 kN, Pu 530 kN, reference speed 530 r/min, limiting speed 950 r/min, mass about 325000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K suffix mean on 23180-cak-w33?", "a": "K marks a 1:12 tapered bore for sleeve mounting — SKF writes EK or CCK(/W33), FAG writes -K- inside the suffix chain for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder. The rarer K30 suffix would instead mean a 1:30 taper; dimension series 40/41 spherical rollers commonly use it." }, { "q": "Which adapter sleeve fits the 23180-cak-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 400 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 23180-cak-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:12 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 23180-cak-w33 and 23180-cak-w33?", "a": "They share the ISO 15 envelope and the same 4864/7650 kN ratings, but 23180-cak-w33 has the 1:12 tapered bore for sleeve mounting on a plain shaft, while 23180-cak-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "23180", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:12) sleeve-mounted execution of 23180; identical ISO 15 envelope, fits OH3180 adapter sleeve on a 380 mm shaft." }, { "equiv_sku": "C3180-M", "equiv_brand": "SKF", "level": "full", "note": "SKF CARB toroidal bearing C 3180 M shares the 400×650×200 mm envelope with ratings within 10 %; it self-aligns but floats axially and cannot locate the shaft — locating/non-locating pair, not a substitute." }, { "equiv_sku": "C3180-KM", "equiv_brand": "SKF", "level": "full", "note": "SKF CARB toroidal bearing C 3180 KM shares the 400×650×200 mm envelope with ratings within 10 %; it self-aligns but floats axially and cannot locate the shaft — locating/non-locating pair, not a substitute." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.2 adapter-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "23180-CAK-W33", "SKF 23180 CAK/W33", "23180 K" ], "locale_variants": {} }, { "sku": "23280-CAK-W33", "brand": "SKF", "manufacturer_designation": "SKF 23280 CAK/W33", "series": "23200-series", "type": "spherical_roller", "d_mm": 400, "D_mm": 720, "B_mm": 256, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "brass_machined_M1", "dynamic_load_kN": 6881, "static_load_kN": 10400, "fatigue_load_limit_kN": 680, "max_rpm": 670, "reference_speed_rpm": 480, "limiting_speed_rpm": 670, "weight_g": 505000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Ordering number SKF 23280 CAK/W33 in SKF catalogue PUB BU/P1 17000 is a double-row spherical roller bearing with a tapered bore (1:12), intended for an H-series adapter sleeve or AH withdrawal sleeve, with a one-piece machined brass cage guided on the inner ring (CA design) and the same 400×720×256 mm ISO 15 outline as its cylindrical-bore counterpart. Reading the designation: the leading 2 marks a spherical roller bearing, the 32 is the ISO 15 dimension series (dimension series 32 (medium OD, extra wide)), and the last two digits encode the 400 mm bore; the 720 mm OD and 256 mm width follow the ISO 15 general plan. Reading the suffix on 23280-cak-w33, the K (or EK/CCK) element changes only the bore — 1:12 taper for sleeve mounting — while the rest of the suffix chain (CA machined-brass-cage design with W33 groove) keeps the same internal design, cage and W33 relubrication features as the cylindrical-bore 23280-cak-w33. The 160.0 mm radial section height ((720−400)/2) and 505000 g catalogue mass frame a 400 mm bore bearing rated at 6881 kN C — roughly 17.20 kN of dynamic capacity per millimetre of bore before application factors. At 400 mm bore, dismount after service is by KM locknut reversal or a hydraulic nut on larger sizes; oil-injection grooves on the bigger sleeves let pressurised oil float the 23280-cak-w33 off the taper without scoring either surface.", "applications": [ "wind-turbine main shaft support", "heavy rolling-mill work-roll chocks", "shafting produced to commercial tolerances, where the adapter sleeve supplies the precision seat", "split-housing plummer block arrangements with bearings swapped in situ" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "inner-ring circumferential cracking after over-drive on the tapered seat removes too much radial clearance and the bearing runs preloaded", "surface distress and smearing when the relubrication interval is exceeded — the W33 groove is only effective if grease actually reaches the roller rows", "smearing on the roller-raceway contact during skid starts below the minimum load" ], "pitfalls": [ "At 400 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 23200-series series at 400 mm bore (720×256 mm) adds still more width for shock-loaded and vibratory loads; it does not interchange with a 231 bearing of the same bore because the 256 mm width changes abutment spacing, even though the 720 mm OD matches.", "A loose sleeve after the first weeks of service usually means inadequate initial drive-up; re-checking clearance without dismounting is possible through the 256 mm-wide roller rows with feeler gauges — do not simply tighten the KM nut until vibration stops.", "The 23280-cak-w33 and its cylindrical-bore counterpart 23280-cak-w33 share envelope and load ratings (6881/10400 kN) but are not interchangeable in a housing already fitted for direct shaft mounting — the sleeve changes the assembly stack-up.", "Never use the tapered-bore EK/K variant's drive-up figures on this cylindrical-bore 23280-cak-w33; clearance reduction targets differ, and over-driving a cylindrical bore onto an oversized journal cracks the inner ring.", "The 6881/10400 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 23280 CAK/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 23280-cak-w33?", "a": "The SKF 23280 CAK/W33 is a double-row spherical roller bearing with a 1:12 tapered bore, 400 mm nominal bore, 720 mm outer diameter and 256 mm width (15.748 × 28.346 × 10.079 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 6881 kN, C0 10400 kN, Pu 680 kN, reference speed 480 r/min, limiting speed 670 r/min, mass about 505000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K suffix mean on 23280-cak-w33?", "a": "K marks a 1:12 tapered bore for sleeve mounting — SKF writes EK or CCK(/W33), FAG writes -K- inside the suffix chain for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder. The rarer K30 suffix would instead mean a 1:30 taper; dimension series 40/41 spherical rollers commonly use it." }, { "q": "Which adapter sleeve fits the 23280-cak-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 400 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 23280-cak-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:12 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 23280-cak-w33 and 23280-cak-w33?", "a": "They share the ISO 15 envelope and the same 6881/10400 kN ratings, but 23280-cak-w33 has the 1:12 tapered bore for sleeve mounting on a plain shaft, while 23280-cak-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "23280", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:12) sleeve-mounted execution of 23280; identical ISO 15 envelope, fits OH3280 adapter sleeve on a 380 mm shaft." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.2 adapter-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "23280-CAK-W33", "SKF 23280 CAK/W33", "23280 K" ], "locale_variants": {} }, { "sku": "23984-CCK-W33", "brand": "SKF", "manufacturer_designation": "SKF 23984 CCK/W33", "series": "23900-series", "type": "spherical_roller", "d_mm": 420, "D_mm": 560, "B_mm": 106, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 2083, "static_load_kN": 4150, "fatigue_load_limit_kN": 300, "max_rpm": 1100, "reference_speed_rpm": 1000, "limiting_speed_rpm": 1100, "weight_g": 105000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "In SKF catalogue PUB BU/P1 17000, 23984-cck-w33 denotes the tapered-bore version (K suffix, taper 1:12) of the 23900-series spherical roller bearing: dimensioned 420×560×106 mm, it seats on an adapter or withdrawal sleeve rather than directly on a machined journal. The code breaks down as type digit 2 (double-row spherical roller), dimension series 39 (dimension series 39 (compact OD, narrow)), and bore code 84 = 420 mm; dimensions 420×560×106 mm therefore match the ISO 15 envelope. Sleeve mounting is why the K execution exists: a plain h9-tolerance shaft is enough because the adapter sleeve supplies the precision seat, and the bearing is removable without pulling over an interference journal — a separate order number from the cylindrical-bore bearing, never a field conversion. With C 2083 kN and C0 4150 kN, the 23984-cck-w33 load check covers radial plus moderate axial in either direction — but below the minimum load the rollers skid, so verify P ≥ 0.01·C0 at the lightest operating point. For shafts with a locating shoulder, use an AH withdrawal sleeve instead of an adapter sleeve: the bearing presses against the shoulder and the sleeve is drawn out for dismounting, making the 23984-cck-w33 removable without an induction heater.", "applications": [ "heavy rolling-mill work-roll chocks", "large dredger and marine winch drums", "long through-shafts in conveyors, where a sleeve seat avoids a precision journal", "stepped shafts fitted with withdrawal sleeves against a fixed shoulder" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "sleeve seizure and shaft seat damage from omitting the anti-seize film between withdrawal sleeve and journal before drive-up", "surface distress and smearing when the relubrication interval is exceeded — the W33 groove is only effective if grease actually reaches the roller rows", "fretting corrosion on a loose rotating shaft seat or in vibratory stand-still" ], "pitfalls": [ "At 420 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 23900-series series at 420 mm bore (560×106 mm) is the slim-OD envelope: it buys radial space but gives up capacity against a 222-series bearing of the same bore — confirm the L10 margin before downsizing into it.", "The 23984-cck-w33 and its cylindrical-bore counterpart 23984-cc-w33 share envelope and load ratings (2083/4150 kN) but are not interchangeable in a housing already fitted for direct shaft mounting — the sleeve changes the assembly stack-up.", "The 23984-cck-w33 and its cylindrical-bore counterpart 23984-cc-w33 share envelope and load ratings (2083/4150 kN) but are not interchangeable in a housing already fitted for direct shaft mounting — the sleeve changes the assembly stack-up.", "The 105000 g mass and 106 mm width mean abutment faces must be square to the axis within the bearing's own P0 tolerance; a tilted spacer tilts the outer ring and concentrates load on one roller row of 23984-cck-w33.", "The 2083/4150 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 23984 CCK/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 23984-cck-w33?", "a": "The SKF 23984 CCK/W33 is a double-row spherical roller bearing with a 1:12 tapered bore, 420 mm nominal bore, 560 mm outer diameter and 106 mm width (16.535 × 22.047 × 4.173 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 2083 kN, C0 4150 kN, Pu 300 kN, reference speed 1,000 r/min, limiting speed 1,100 r/min, mass about 105000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K suffix mean on 23984-cck-w33?", "a": "K marks a 1:12 tapered bore for sleeve mounting — SKF writes EK or CCK(/W33), FAG writes -K- inside the suffix chain for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder. The rarer K30 suffix would instead mean a 1:30 taper; dimension series 40/41 spherical rollers commonly use it." }, { "q": "Which adapter sleeve fits the 23984-cck-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 420 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 23984-cck-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:12 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 23984-cck-w33 and 23984-cc-w33?", "a": "They share the ISO 15 envelope and the same 2083/4150 kN ratings, but 23984-cck-w33 has the 1:12 tapered bore for sleeve mounting on a plain shaft, while 23984-cc-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "23984", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:12) sleeve-mounted execution of 23984; identical ISO 15 envelope, fits OH3984 adapter sleeve on a 400 mm shaft." }, { "equiv_sku": "C3984-M", "equiv_brand": "SKF", "level": "full", "note": "SKF CARB toroidal bearing C 3984 M shares the 420×560×106 mm envelope with ratings within 10 %; it self-aligns but floats axially and cannot locate the shaft — locating/non-locating pair, not a substitute." }, { "equiv_sku": "C3984-KM", "equiv_brand": "SKF", "level": "full", "note": "SKF CARB toroidal bearing C 3984 KM shares the 420×560×106 mm envelope with ratings within 10 %; it self-aligns but floats axially and cannot locate the shaft — locating/non-locating pair, not a substitute." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.2 adapter-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "23984-CCK-W33", "SKF 23984 CCK/W33", "23984 K" ], "locale_variants": {} }, { "sku": "23184-CKJ-W33", "brand": "SKF", "manufacturer_designation": "SKF 23184 CKJ/W33", "series": "23100-series", "type": "spherical_roller", "d_mm": 420, "D_mm": 700, "B_mm": 224, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 5919, "static_load_kN": 9300, "fatigue_load_limit_kN": 620, "max_rpm": 900, "reference_speed_rpm": 480, "limiting_speed_rpm": 900, "weight_g": 410000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "In SKF catalogue PUB BU/P1 17000, 23184-ckj-w33 denotes the tapered-bore version (K suffix, taper 1:12) of the 23100-series spherical roller bearing: dimensioned 420×700×224 mm, it seats on an adapter or withdrawal sleeve rather than directly on a machined journal. Digit by digit, 23184-ckj-w33 reads as bearing type 2 (spherical roller, two barrel-roller rows), dimension series 31, and bore reference 84 resolving to 420 mm; 700 mm OD and 224 mm width are the matching ISO 15 boundary values. Note that K means 1:12 taper; the rarer K30 suffix means 1:30. Adapter sleeves (H) and withdrawal sleeves (AH) are ordered separately by shaft diameter, and the KM locknut plus MB lock washer used for drive-up are also separate components. The 140.0 mm radial section height ((700−420)/2) and 410000 g catalogue mass frame a 420 mm bore bearing rated at 5919 kN C — roughly 14.09 kN of dynamic capacity per millimetre of bore before application factors. After drive-up, re-check radial clearance and then swing the outer ring through its self-aligning range: the sphered raceway of the 23184-ckj-w33 must still tilt ≈ 0.5–2.5° freely — a joint that binds after sleeve mounting signals excessive drive-up or a cocked sleeve.", "applications": [ "wind-turbine main shaft support", "heavy rolling-mill work-roll chocks", "stepped shafts fitted with withdrawal sleeves against a fixed shoulder", "fan and pulley shafts that need periodic bearing removal in the field" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "sleeve seizure and shaft seat damage from omitting the anti-seize film between withdrawal sleeve and journal before drive-up", "roller-end scoring from starved lubricant at start-up before the grease channel purges", "electrical pitting on VFD-driven shafts without grounding protection" ], "pitfalls": [ "At 420 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 23100-series series at 420 mm bore (700×224 mm) is the medium-OD wide envelope for heavy continuous duty; it is wider than a 222 bearing in the same OD class, so housing width and spacer stack must be re-checked before substitution.", "The 23184-ckj-w33 and its cylindrical-bore counterpart 23184-ckj-w33 share envelope and load ratings (5919/9300 kN) but are not interchangeable in a housing already fitted for direct shaft mounting — the sleeve changes the assembly stack-up.", "Never apply the drive-up or clearance-reduction figures for this 1:12 tapered 23184-ckj-w33 to a bearing of the other taper (1:12 vs 1:30); the steeper taper moves far less clearance per nut turn and the targets come from different catalogue tables.", "The self-aligning feature is not a license to ignore alignment: beyond ≈ 0.5–2.5° (series-dependent) the edge loading eats the fatigue margin, and seal drag grows as the rings tilt.", "The 5919/9300 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 23184 CKJ/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 23184-ckj-w33?", "a": "The SKF 23184 CKJ/W33 is a double-row spherical roller bearing with a 1:12 tapered bore, 420 mm nominal bore, 700 mm outer diameter and 224 mm width (16.535 × 27.559 × 8.819 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 5919 kN, C0 9300 kN, Pu 620 kN, reference speed 480 r/min, limiting speed 900 r/min, mass about 410000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K suffix mean on 23184-ckj-w33?", "a": "K marks a 1:12 tapered bore for sleeve mounting — SKF writes EK or CCK(/W33), FAG writes -K- inside the suffix chain for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder. The rarer K30 suffix would instead mean a 1:30 taper; dimension series 40/41 spherical rollers commonly use it." }, { "q": "Which adapter sleeve fits the 23184-ckj-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 420 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 23184-ckj-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:12 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 23184-ckj-w33 and 23184-ckj-w33?", "a": "They share the ISO 15 envelope and the same 5919/9300 kN ratings, but 23184-ckj-w33 has the 1:12 tapered bore for sleeve mounting on a plain shaft, while 23184-ckj-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "23184", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:12) sleeve-mounted execution of 23184; identical ISO 15 envelope, fits OH3184 adapter sleeve on a 400 mm shaft." }, { "equiv_sku": "C3184-M", "equiv_brand": "SKF", "level": "partial", "note": "SKF CARB toroidal bearing C 3184 M shares the 420×700×224 mm envelope but catalogue C/C0 differ (6000/10400 kN vs 5919/9300 kN); it floats axially and cannot locate the shaft — pair, never swap one-for-one." }, { "equiv_sku": "C3184-KM", "equiv_brand": "SKF", "level": "partial", "note": "SKF CARB toroidal bearing C 3184 KM shares the 420×700×224 mm envelope but catalogue C/C0 differ (6000/10400 kN vs 5919/9300 kN); it floats axially and cannot locate the shaft — pair, never swap one-for-one." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.2 adapter-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "23184-CKJ-W33", "SKF 23184 CKJ/W33", "23184 K" ], "locale_variants": {} }, { "sku": "23284-CAK-W33", "brand": "SKF", "manufacturer_designation": "SKF 23284 CAK/W33", "series": "23200-series", "type": "spherical_roller", "d_mm": 420, "D_mm": 760, "B_mm": 272, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "brass_machined_M1", "dynamic_load_kN": 7677, "static_load_kN": 11600, "fatigue_load_limit_kN": 765, "max_rpm": 630, "reference_speed_rpm": 450, "limiting_speed_rpm": 630, "weight_g": 590000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Ordering number SKF 23284 CAK/W33 in SKF catalogue PUB BU/P1 17000 is a double-row spherical roller bearing with a tapered bore (1:12), intended for an H-series adapter sleeve or AH withdrawal sleeve, with a one-piece machined brass cage guided on the inner ring (CA design) and the same 420×760×272 mm ISO 15 outline as its cylindrical-bore counterpart. The code breaks down as type digit 2 (double-row spherical roller), dimension series 32 (dimension series 32 (medium OD, extra wide)), and bore code 84 = 420 mm; dimensions 420×760×272 mm therefore match the ISO 15 envelope. Reading the suffix on 23284-cak-w33, the K (or EK/CCK) element changes only the bore — 1:12 taper for sleeve mounting — while the rest of the suffix chain (CA machined-brass-cage design with W33 groove) keeps the same internal design, cage and W33 relubrication features as the cylindrical-bore 23284-cak-w33. Speed planning uses two different ceilings: 450 r/min thermal reference and 630 r/min mechanical limiting speed. Because driving up the 1:12 taper consumes radial clearance, K executions are commonly ordered with C3 initial clearance so the residual running clearance after mounting matches the cylindrical-bore 23284-cak-w33 on an interference seat.", "applications": [ "large mining crusher main shafts", "wind-turbine main shaft support", "heavy crusher and screen shafts mounted and dismounted with hydraulic nuts", "long through-shafts in conveyors, where a sleeve seat avoids a precision journal" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "fretting corrosion and sleeve-seat scoring when drive-up is insufficient and the tapered inner ring creeps on the adapter sleeve", "surface distress and smearing when the relubrication interval is exceeded — the W33 groove is only effective if grease actually reaches the roller rows", "smearing on the roller-raceway contact during skid starts below the minimum load" ], "pitfalls": [ "At 420 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 23200-series series at 420 mm bore (760×272 mm) adds still more width for shock-loaded and vibratory loads; it does not interchange with a 231 bearing of the same bore because the 272 mm width changes abutment spacing, even though the 760 mm OD matches.", "A loose sleeve after the first weeks of service usually means inadequate initial drive-up; re-checking clearance without dismounting is possible through the 272 mm-wide roller rows with feeler gauges — do not simply tighten the KM nut until vibration stops.", "The 23284-cak-w33 and its cylindrical-bore counterpart 23284-cak-w33 share envelope and load ratings (7677/11600 kN) but are not interchangeable in a housing already fitted for direct shaft mounting — the sleeve changes the assembly stack-up.", "Never use the tapered-bore EK/K variant's drive-up figures on this cylindrical-bore 23284-cak-w33; clearance reduction targets differ, and over-driving a cylindrical bore onto an oversized journal cracks the inner ring.", "The 7677/11600 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 23284 CAK/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 23284-cak-w33?", "a": "The SKF 23284 CAK/W33 is a double-row spherical roller bearing with a 1:12 tapered bore, 420 mm nominal bore, 760 mm outer diameter and 272 mm width (16.535 × 29.921 × 10.709 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 7677 kN, C0 11600 kN, Pu 765 kN, reference speed 450 r/min, limiting speed 630 r/min, mass about 590000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K suffix mean on 23284-cak-w33?", "a": "K marks a 1:12 tapered bore for sleeve mounting — SKF writes EK or CCK(/W33), FAG writes -K- inside the suffix chain for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder. The rarer K30 suffix would instead mean a 1:30 taper; dimension series 40/41 spherical rollers commonly use it." }, { "q": "Which adapter sleeve fits the 23284-cak-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 420 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 23284-cak-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:12 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 23284-cak-w33 and 23284-cak-w33?", "a": "They share the ISO 15 envelope and the same 7677/11600 kN ratings, but 23284-cak-w33 has the 1:12 tapered bore for sleeve mounting on a plain shaft, while 23284-cak-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "23284", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:12) sleeve-mounted execution of 23284; identical ISO 15 envelope, fits OH3284 adapter sleeve on a 400 mm shaft." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.2 adapter-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "23284-CAK-W33", "SKF 23284 CAK/W33", "23284 K" ], "locale_variants": {} }, { "sku": "23988-CCK-W33", "brand": "SKF", "manufacturer_designation": "SKF 23988 CCK/W33", "series": "23900-series", "type": "spherical_roller", "d_mm": 440, "D_mm": 600, "B_mm": 118, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 2506, "static_load_kN": 4900, "fatigue_load_limit_kN": 345, "max_rpm": 1000, "reference_speed_rpm": 950, "limiting_speed_rpm": 1000, "weight_g": 150000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "In SKF catalogue PUB BU/P1 17000, 23988-cck-w33 denotes the tapered-bore version (K suffix, taper 1:12) of the 23900-series spherical roller bearing: dimensioned 440×600×118 mm, it seats on an adapter or withdrawal sleeve rather than directly on a machined journal. On the SKF nameplate, 23988-cck-w33 follows the ISO 15 convention: 2 for the spherical roller type, 39 for the dimension series 39 (compact OD, narrow), final digits 88 for the 440 mm bore. Sleeve mounting is why the K execution exists: a plain h9-tolerance shaft is enough because the adapter sleeve supplies the precision seat, and the bearing is removable without pulling over an interference journal — a separate order number from the cylindrical-bore bearing, never a field conversion. The 80.0 mm radial section height ((600−440)/2) and 150000 g catalogue mass frame a 440 mm bore bearing rated at 2506 kN C — roughly 5.70 kN of dynamic capacity per millimetre of bore before application factors. After drive-up, re-check radial clearance and then swing the outer ring through its self-aligning range: the sphered raceway of the 23988-cck-w33 must still tilt ≈ 0.5–2.5° freely — a joint that binds after sleeve mounting signals excessive drive-up or a cocked sleeve.", "applications": [ "wind-turbine main shaft support", "heavy rolling-mill work-roll chocks", "fan and pulley shafts that need periodic bearing removal in the field", "shafting produced to commercial tolerances, where the adapter sleeve supplies the precision seat" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "inner-ring circumferential cracking after over-drive on the tapered seat removes too much radial clearance and the bearing runs preloaded", "surface distress and smearing when the relubrication interval is exceeded — the W33 groove is only effective if grease actually reaches the roller rows", "fretting corrosion on a loose rotating shaft seat or in vibratory stand-still" ], "pitfalls": [ "At 440 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 23900-series series at 440 mm bore (600×118 mm) is the slim-OD envelope: it buys radial space but gives up capacity against a 222-series bearing of the same bore — confirm the L10 margin before downsizing into it.", "The 23988-cck-w33 and its cylindrical-bore counterpart 23988-cc-w33 share envelope and load ratings (2506/4900 kN) but are not interchangeable in a housing already fitted for direct shaft mounting — the sleeve changes the assembly stack-up.", "The 23988-cck-w33 and its cylindrical-bore counterpart 23988-cc-w33 share envelope and load ratings (2506/4900 kN) but are not interchangeable in a housing already fitted for direct shaft mounting — the sleeve changes the assembly stack-up.", "The 150000 g mass and 118 mm width mean abutment faces must be square to the axis within the bearing's own P0 tolerance; a tilted spacer tilts the outer ring and concentrates load on one roller row of 23988-cck-w33.", "The 2506/4900 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 23988 CCK/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 23988-cck-w33?", "a": "The SKF 23988 CCK/W33 is a double-row spherical roller bearing with a 1:12 tapered bore, 440 mm nominal bore, 600 mm outer diameter and 118 mm width (17.323 × 23.622 × 4.646 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 2506 kN, C0 4900 kN, Pu 345 kN, reference speed 950 r/min, limiting speed 1,000 r/min, mass about 150000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K suffix mean on 23988-cck-w33?", "a": "K marks a 1:12 tapered bore for sleeve mounting — SKF writes EK or CCK(/W33), FAG writes -K- inside the suffix chain for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder. The rarer K30 suffix would instead mean a 1:30 taper; dimension series 40/41 spherical rollers commonly use it." }, { "q": "Which adapter sleeve fits the 23988-cck-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 440 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 23988-cck-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:12 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 23988-cck-w33 and 23988-cc-w33?", "a": "They share the ISO 15 envelope and the same 2506/4900 kN ratings, but 23988-cck-w33 has the 1:12 tapered bore for sleeve mounting on a plain shaft, while 23988-cc-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "23988-NTN", "equiv_brand": "NTN", "level": "partial", "note": "Same 440×600×118 mm envelope per ISO 15; catalogue load ratings differ by >10% — re-rate the application before substituting." }, { "equiv_sku": "23988", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:12) sleeve-mounted execution of 23988; identical ISO 15 envelope, fits OH3988 adapter sleeve on a 410 mm shaft." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.2 adapter-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "23988-CCK-W33", "SKF 23988 CCK/W33", "23988 K" ], "locale_variants": {} }, { "sku": "23188-CAK-W33", "brand": "SKF", "manufacturer_designation": "SKF 23188 CAK/W33", "series": "23100-series", "type": "spherical_roller", "d_mm": 440, "D_mm": 720, "B_mm": 226, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "brass_machined_M1", "dynamic_load_kN": 6215, "static_load_kN": 10000, "fatigue_load_limit_kN": 670, "max_rpm": 850, "reference_speed_rpm": 450, "limiting_speed_rpm": 850, "weight_g": 430000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "23188-cak-w33 is the 1:12 tapered-bore execution of the 23100-series spherical roller bearing: the same two barrel-roller rows on a sphered outer raceway as 23188-cak-w33, but the inner-ring bore tapers 1 mm per 12 mm for adapter- or withdrawal-sleeve mounting, as listed by SKF in SKF catalogue PUB BU/P1 17000. Numbering ties the bearing to its envelope: 23188-cak-w33 means spherical-roller type, dimension series 31, 440 mm bore — which is why the 720×226 mm outline swaps dimensionally with other ISO 15 bearings of the same code. Note that K means 1:12 taper; the rarer K30 suffix means 1:30. Adapter sleeves (H) and withdrawal sleeves (AH) are ordered separately by shaft diameter, and the KM locknut plus MB lock washer used for drive-up are also separate components. The 140.0 mm radial section height ((720−440)/2) and 430000 g catalogue mass frame a 440 mm bore bearing rated at 6215 kN C — roughly 14.13 kN of dynamic capacity per millimetre of bore before application factors. Over-driving the 23188-cak-w33 up its sleeve pinches radial clearance below the residual minimum and can crack the inner ring in service; under-driving leaves the sleeve seat loose, so the ring creeps and frets the sleeve — measure, do not estimate.", "applications": [ "wind-turbine main shaft support", "heavy rolling-mill work-roll chocks", "heavy crusher and screen shafts mounted and dismounted with hydraulic nuts", "long through-shafts in conveyors, where a sleeve seat avoids a precision journal" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "fretting corrosion and sleeve-seat scoring when drive-up is insufficient and the tapered inner ring creeps on the adapter sleeve", "roller-end scoring from starved lubricant at start-up before the grease channel purges", "seal-lip wear and grease purge loss when an open bearing is run without functioning housing seals" ], "pitfalls": [ "At 440 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 23100-series series at 440 mm bore (720×226 mm) is the medium-OD wide envelope for heavy continuous duty; it is wider than a 222 bearing in the same OD class, so housing width and spacer stack must be re-checked before substitution.", "The 23188-cak-w33 and its cylindrical-bore counterpart 23188-cak-w33 share envelope and load ratings (6215/10000 kN) but are not interchangeable in a housing already fitted for direct shaft mounting — the sleeve changes the assembly stack-up.", "A loose sleeve after the first weeks of service usually means inadequate initial drive-up; re-checking clearance without dismounting is possible through the 226 mm-wide roller rows with feeler gauges — do not simply tighten the KM nut until vibration stops.", "Open spherical roller bearings rely on the housing seals; in screening or crusher duty a failed seal lets grit into the sphered raceway and the 23188-cak-w33 pits long before its L10 life.", "The 6215/10000 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 23188 CAK/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 23188-cak-w33?", "a": "The SKF 23188 CAK/W33 is a double-row spherical roller bearing with a 1:12 tapered bore, 440 mm nominal bore, 720 mm outer diameter and 226 mm width (17.323 × 28.346 × 8.898 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 6215 kN, C0 10000 kN, Pu 670 kN, reference speed 450 r/min, limiting speed 850 r/min, mass about 430000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K suffix mean on 23188-cak-w33?", "a": "K marks a 1:12 tapered bore for sleeve mounting — SKF writes EK or CCK(/W33), FAG writes -K- inside the suffix chain for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder. The rarer K30 suffix would instead mean a 1:30 taper; dimension series 40/41 spherical rollers commonly use it." }, { "q": "Which adapter sleeve fits the 23188-cak-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 440 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 23188-cak-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:12 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 23188-cak-w33 and 23188-cak-w33?", "a": "They share the ISO 15 envelope and the same 6215/10000 kN ratings, but 23188-cak-w33 has the 1:12 tapered bore for sleeve mounting on a plain shaft, while 23188-cak-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "23188", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:12) sleeve-mounted execution of 23188; identical ISO 15 envelope, fits OH3188 adapter sleeve on a 410 mm shaft." }, { "equiv_sku": "C3188-MB", "equiv_brand": "SKF", "level": "partial", "note": "SKF CARB toroidal bearing C 3188 MB shares the 440×720×226 mm envelope but catalogue C/C0 differ (6700/11400 kN vs 6215/10000 kN); it floats axially and cannot locate the shaft — pair, never swap one-for-one." }, { "equiv_sku": "C3188-KMB", "equiv_brand": "SKF", "level": "partial", "note": "SKF CARB toroidal bearing C 3188 KMB shares the 440×720×226 mm envelope but catalogue C/C0 differ (6700/11400 kN vs 6215/10000 kN); it floats axially and cannot locate the shaft — pair, never swap one-for-one." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.2 adapter-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "23188-CAK-W33", "SKF 23188 CAK/W33", "23188 K" ], "locale_variants": {} }, { "sku": "23288-CAK-W33", "brand": "SKF", "manufacturer_designation": "SKF 23288 CAK/W33", "series": "23200-series", "type": "spherical_roller", "d_mm": 440, "D_mm": 790, "B_mm": 280, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "brass_machined_M1", "dynamic_load_kN": 8150, "static_load_kN": 12500, "fatigue_load_limit_kN": 800, "max_rpm": 600, "reference_speed_rpm": 430, "limiting_speed_rpm": 600, "weight_g": 670000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "23288-cak-w33 is the 1:12 tapered-bore execution of the 23200-series spherical roller bearing: the same two barrel-roller rows on a sphered outer raceway as 23288-cak-w33, but the inner-ring bore tapers 1 mm per 12 mm for adapter- or withdrawal-sleeve mounting, as listed by SKF in SKF catalogue PUB BU/P1 17000. On the SKF nameplate, 23288-cak-w33 follows the ISO 15 convention: 2 for the spherical roller type, 32 for the dimension series 32 (medium OD, extra wide), final digits 88 for the 440 mm bore. Note that K means 1:12 taper; the rarer K30 suffix means 1:30. Adapter sleeves (H) and withdrawal sleeves (AH) are ordered separately by shaft diameter, and the KM locknut plus MB lock washer used for drive-up are also separate components. Speed planning uses two different ceilings: 430 r/min thermal reference and 600 r/min mechanical limiting speed. After drive-up, re-check radial clearance and then swing the outer ring through its self-aligning range: the sphered raceway of the 23288-cak-w33 must still tilt ≈ 0.5–2.5° freely — a joint that binds after sleeve mounting signals excessive drive-up or a cocked sleeve.", "applications": [ "large mining crusher main shafts", "wind-turbine main shaft support", "shafting produced to commercial tolerances, where the adapter sleeve supplies the precision seat", "split-housing plummer block arrangements with bearings swapped in situ" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "sleeve seizure and shaft seat damage from omitting the anti-seize film between withdrawal sleeve and journal before drive-up", "roller-end scoring from starved lubricant at start-up before the grease channel purges", "electrical pitting on VFD-driven shafts without grounding protection" ], "pitfalls": [ "At 440 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 23200-series series at 440 mm bore (790×280 mm) adds still more width for shock-loaded and vibratory loads; it does not interchange with a 231 bearing of the same bore because the 280 mm width changes abutment spacing, even though the 790 mm OD matches.", "A loose sleeve after the first weeks of service usually means inadequate initial drive-up; re-checking clearance without dismounting is possible through the 280 mm-wide roller rows with feeler gauges — do not simply tighten the KM nut until vibration stops.", "Never apply the drive-up or clearance-reduction figures for this 1:12 tapered 23288-cak-w33 to a bearing of the other taper (1:12 vs 1:30); the steeper taper moves far less clearance per nut turn and the targets come from different catalogue tables.", "Shaft and housing fillets must clear the bearing chamfer so the 280 mm-wide rings seat square; use an undercut or withdrawal groove rather than an oversized radius that locks on the ring face.", "The 8150/12500 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 23288 CAK/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 23288-cak-w33?", "a": "The SKF 23288 CAK/W33 is a double-row spherical roller bearing with a 1:12 tapered bore, 440 mm nominal bore, 790 mm outer diameter and 280 mm width (17.323 × 31.102 × 11.024 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 8150 kN, C0 12500 kN, Pu 800 kN, reference speed 430 r/min, limiting speed 600 r/min, mass about 670000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K suffix mean on 23288-cak-w33?", "a": "K marks a 1:12 tapered bore for sleeve mounting — SKF writes EK or CCK(/W33), FAG writes -K- inside the suffix chain for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder. The rarer K30 suffix would instead mean a 1:30 taper; dimension series 40/41 spherical rollers commonly use it." }, { "q": "Which adapter sleeve fits the 23288-cak-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 440 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 23288-cak-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:12 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 23288-cak-w33 and 23288-cak-w33?", "a": "They share the ISO 15 envelope and the same 8150/12500 kN ratings, but 23288-cak-w33 has the 1:12 tapered bore for sleeve mounting on a plain shaft, while 23288-cak-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "23288", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:12) sleeve-mounted execution of 23288; identical ISO 15 envelope, fits OH3288 adapter sleeve on a 410 mm shaft." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.2 adapter-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "23288-CAK-W33", "SKF 23288 CAK/W33", "23288 K" ], "locale_variants": {} }, { "sku": "23992-CAK-W33", "brand": "SKF", "manufacturer_designation": "SKF 23992 CAK/W33", "series": "23900-series", "type": "spherical_roller", "d_mm": 460, "D_mm": 620, "B_mm": 118, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "brass_machined_M1", "dynamic_load_kN": 2558, "static_load_kN": 5000, "fatigue_load_limit_kN": 355, "max_rpm": 1000, "reference_speed_rpm": 600, "limiting_speed_rpm": 1000, "weight_g": 160000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "SKF lists SKF 23992 CAK/W33 as the adapter-sleeve execution in the 23900-series range: a 460 mm nominal-bore spherical roller bearing whose 1:12 tapered inner ring is driven up a sleeve, with 620 mm OD and 118 mm width to the ISO 15 envelope. Digit by digit, 23992-cak-w33 reads as bearing type 2 (spherical roller, two barrel-roller rows), dimension series 39, and bore reference 92 resolving to 460 mm; 620 mm OD and 118 mm width are the matching ISO 15 boundary values. Sleeve mounting is why the K execution exists: a plain h9-tolerance shaft is enough because the adapter sleeve supplies the precision seat, and the bearing is removable without pulling over an interference journal — a separate order number from the cylindrical-bore bearing, never a field conversion. At 600 r/min reference speed the 80.0 mm-section 23992-cak-w33 is governed thermally by lubricant flow through the W33 groove and the two-row roller complement; grease or oil selection should be made against that value, with 1,000 r/min as the mechanical ceiling. After drive-up, re-check radial clearance and then swing the outer ring through its self-aligning range: the sphered raceway of the 23992-cak-w33 must still tilt ≈ 0.5–2.5° freely — a joint that binds after sleeve mounting signals excessive drive-up or a cocked sleeve.", "applications": [ "large induced-draft fan rotors", "SAG and ball-mill drive shafts", "long through-shafts in conveyors, where a sleeve seat avoids a precision journal", "stepped shafts fitted with withdrawal sleeves against a fixed shoulder" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "fretting corrosion and sleeve-seat scoring when drive-up is insufficient and the tapered inner ring creeps on the adapter sleeve", "roller-end scoring from starved lubricant at start-up before the grease channel purges", "fretting corrosion on a loose rotating shaft seat or in vibratory stand-still" ], "pitfalls": [ "At 460 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 23900-series series at 460 mm bore (620×118 mm) is the slim-OD envelope: it buys radial space but gives up capacity against a 222-series bearing of the same bore — confirm the L10 margin before downsizing into it.", "Never apply the drive-up or clearance-reduction figures for this 1:12 tapered 23992-cak-w33 to a bearing of the other taper (1:12 vs 1:30); the steeper taper moves far less clearance per nut turn and the targets come from different catalogue tables.", "Never apply the drive-up or clearance-reduction figures for this 1:12 tapered 23992-cak-w33 to a bearing of the other taper (1:12 vs 1:30); the steeper taper moves far less clearance per nut turn and the targets come from different catalogue tables.", "The 23992-cak-w33 shares its ISO 15 envelope across brands, but internal geometry differs — SKF load ratings in this row are 2558/5000 kN; another maker's same-size bearing may rate higher or lower, so do not interchange on envelope alone.", "The 2558/5000 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 23992 CAK/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 23992-cak-w33?", "a": "The SKF 23992 CAK/W33 is a double-row spherical roller bearing with a 1:12 tapered bore, 460 mm nominal bore, 620 mm outer diameter and 118 mm width (18.11 × 24.409 × 4.646 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 2558 kN, C0 5000 kN, Pu 355 kN, reference speed 600 r/min, limiting speed 1,000 r/min, mass about 160000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K suffix mean on 23992-cak-w33?", "a": "K marks a 1:12 tapered bore for sleeve mounting — SKF writes EK or CCK(/W33), FAG writes -K- inside the suffix chain for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder. The rarer K30 suffix would instead mean a 1:30 taper; dimension series 40/41 spherical rollers commonly use it." }, { "q": "Which adapter sleeve fits the 23992-cak-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 460 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 23992-cak-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:12 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 23992-cak-w33 and 23992-cak-w33?", "a": "They share the ISO 15 envelope and the same 2558/5000 kN ratings, but 23992-cak-w33 has the 1:12 tapered bore for sleeve mounting on a plain shaft, while 23992-cak-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "23992-NTN", "equiv_brand": "NTN", "level": "full", "note": "Identical ISO 15 envelope, seal and ratings band — standard interchange; re-verify precision class and clearance per supplier." }, { "equiv_sku": "23992", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:12) sleeve-mounted execution of 23992; identical ISO 15 envelope, fits OH3992 adapter sleeve on a 430 mm shaft." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.2 adapter-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "23992-CAK-W33", "SKF 23992 CAK/W33", "23992 K" ], "locale_variants": {} }, { "sku": "23192-CAK-W33", "brand": "SKF", "manufacturer_designation": "SKF 23192 CAK/W33", "series": "23100-series", "type": "spherical_roller", "d_mm": 460, "D_mm": 760, "B_mm": 240, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "brass_machined_M1", "dynamic_load_kN": 6760, "static_load_kN": 10800, "fatigue_load_limit_kN": 680, "max_rpm": 800, "reference_speed_rpm": 430, "limiting_speed_rpm": 800, "weight_g": 530000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "In SKF catalogue PUB BU/P1 17000, 23192-cak-w33 denotes the tapered-bore version (K suffix, taper 1:12) of the 23100-series spherical roller bearing: dimensioned 460×760×240 mm, it seats on an adapter or withdrawal sleeve rather than directly on a machined journal. Reading the designation: the leading 2 marks a spherical roller bearing, the 31 is the ISO 15 dimension series (dimension series 31 (medium OD, wide)), and the last two digits encode the 460 mm bore; the 760 mm OD and 240 mm width follow the ISO 15 general plan. Note that K means 1:12 taper; the rarer K30 suffix means 1:30. Adapter sleeves (H) and withdrawal sleeves (AH) are ordered separately by shaft diameter, and the KM locknut plus MB lock washer used for drive-up are also separate components. The 680 kN Pu figure feeds the adjusted-life equation at contaminated or partial-film conditions, and the 1.60 C0/C balance shows this execution is tuned to heavy radial-plus-axial duty with misalignment tolerance. Because driving up the 1:12 taper consumes radial clearance, K executions are commonly ordered with C3 initial clearance so the residual running clearance after mounting matches the cylindrical-bore 23192-cak-w33 on an interference seat.", "applications": [ "steel-plant continuous-caster segments", "large induced-draft fan rotors", "stepped shafts fitted with withdrawal sleeves against a fixed shoulder", "fan and pulley shafts that need periodic bearing removal in the field" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "fretting corrosion and sleeve-seat scoring when drive-up is insufficient and the tapered inner ring creeps on the adapter sleeve", "roller-end scoring from starved lubricant at start-up before the grease channel purges", "electrical pitting on VFD-driven shafts without grounding protection" ], "pitfalls": [ "At 460 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 23100-series series at 460 mm bore (760×240 mm) is the medium-OD wide envelope for heavy continuous duty; it is wider than a 222 bearing in the same OD class, so housing width and spacer stack must be re-checked before substitution.", "The adapter sleeve is selected by actual shaft diameter, not by the 460 mm nominal bearing bore: H-sleeve part numbers span a small diameter range, so two different shaft diameters can use the same 23192-cak-w33 with different sleeves.", "Never apply the drive-up or clearance-reduction figures for this 1:12 tapered 23192-cak-w33 to a bearing of the other taper (1:12 vs 1:30); the steeper taper moves far less clearance per nut turn and the targets come from different catalogue tables.", "The self-aligning feature is not a license to ignore alignment: beyond ≈ 0.5–2.5° (series-dependent) the edge loading eats the fatigue margin, and seal drag grows as the rings tilt.", "The 6760/10800 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 23192 CAK/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 23192-cak-w33?", "a": "The SKF 23192 CAK/W33 is a double-row spherical roller bearing with a 1:12 tapered bore, 460 mm nominal bore, 760 mm outer diameter and 240 mm width (18.11 × 29.921 × 9.449 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 6760 kN, C0 10800 kN, Pu 680 kN, reference speed 430 r/min, limiting speed 800 r/min, mass about 530000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K suffix mean on 23192-cak-w33?", "a": "K marks a 1:12 tapered bore for sleeve mounting — SKF writes EK or CCK(/W33), FAG writes -K- inside the suffix chain for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder. The rarer K30 suffix would instead mean a 1:30 taper; dimension series 40/41 spherical rollers commonly use it." }, { "q": "Which adapter sleeve fits the 23192-cak-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 460 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 23192-cak-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:12 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 23192-cak-w33 and 23192-cak-w33?", "a": "They share the ISO 15 envelope and the same 6760/10800 kN ratings, but 23192-cak-w33 has the 1:12 tapered bore for sleeve mounting on a plain shaft, while 23192-cak-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "23192", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:12) sleeve-mounted execution of 23192; identical ISO 15 envelope, fits OH3192 adapter sleeve on a 430 mm shaft." }, { "equiv_sku": "C3192-M", "equiv_brand": "SKF", "level": "partial", "note": "SKF CARB toroidal bearing C 3192 M shares the 460×760×240 mm envelope but catalogue C/C0 differ (6800/12000 kN vs 6760/10800 kN); it floats axially and cannot locate the shaft — pair, never swap one-for-one." }, { "equiv_sku": "C3192-KM", "equiv_brand": "SKF", "level": "partial", "note": "SKF CARB toroidal bearing C 3192 KM shares the 460×760×240 mm envelope but catalogue C/C0 differ (6800/12000 kN vs 6760/10800 kN); it floats axially and cannot locate the shaft — pair, never swap one-for-one." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.2 adapter-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "23192-CAK-W33", "SKF 23192 CAK/W33", "23192 K" ], "locale_variants": {} }, { "sku": "23292-CAK-W33", "brand": "SKF", "manufacturer_designation": "SKF 23292 CAK/W33", "series": "23200-series", "type": "spherical_roller", "d_mm": 460, "D_mm": 830, "B_mm": 296, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "brass_machined_M1", "dynamic_load_kN": 8958, "static_load_kN": 13700, "fatigue_load_limit_kN": 880, "max_rpm": 560, "reference_speed_rpm": 400, "limiting_speed_rpm": 560, "weight_g": 790000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "SKF lists SKF 23292 CAK/W33 as the adapter-sleeve execution in the 23200-series range: a 460 mm nominal-bore spherical roller bearing whose 1:12 tapered inner ring is driven up a sleeve, with 830 mm OD and 296 mm width to the ISO 15 envelope. Digit by digit, 23292-cak-w33 reads as bearing type 2 (spherical roller, two barrel-roller rows), dimension series 32, and bore reference 92 resolving to 460 mm; 830 mm OD and 296 mm width are the matching ISO 15 boundary values. Note that K means 1:12 taper; the rarer K30 suffix means 1:30. Adapter sleeves (H) and withdrawal sleeves (AH) are ordered separately by shaft diameter, and the KM locknut plus MB lock washer used for drive-up are also separate components. With C 8958 kN and C0 13700 kN, the 23292-cak-w33 load check covers radial plus moderate axial in either direction — but below the minimum load the rollers skid, so verify P ≥ 0.01·C0 at the lightest operating point. At 460 mm bore, dismount after service is by KM locknut reversal or a hydraulic nut on larger sizes; oil-injection grooves on the bigger sleeves let pressurised oil float the 23292-cak-w33 off the taper without scoring either surface.", "applications": [ "heavy rolling-mill work-roll chocks", "large dredger and marine winch drums", "heavy crusher and screen shafts mounted and dismounted with hydraulic nuts", "long through-shafts in conveyors, where a sleeve seat avoids a precision journal" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "sleeve seizure and shaft seat damage from omitting the anti-seize film between withdrawal sleeve and journal before drive-up", "surface distress and smearing when the relubrication interval is exceeded — the W33 groove is only effective if grease actually reaches the roller rows", "electrical pitting on VFD-driven shafts without grounding protection" ], "pitfalls": [ "At 460 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 23200-series series at 460 mm bore (830×296 mm) adds still more width for shock-loaded and vibratory loads; it does not interchange with a 231 bearing of the same bore because the 296 mm width changes abutment spacing, even though the 830 mm OD matches.", "Never apply the drive-up or clearance-reduction figures for this 1:12 tapered 23292-cak-w33 to a bearing of the other taper (1:12 vs 1:30); the steeper taper moves far less clearance per nut turn and the targets come from different catalogue tables.", "The adapter sleeve is selected by actual shaft diameter, not by the 460 mm nominal bearing bore: H-sleeve part numbers span a small diameter range, so two different shaft diameters can use the same 23292-cak-w33 with different sleeves.", "Shaft and housing fillets must clear the bearing chamfer so the 296 mm-wide rings seat square; use an undercut or withdrawal groove rather than an oversized radius that locks on the ring face.", "The 8958/13700 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 23292 CAK/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 23292-cak-w33?", "a": "The SKF 23292 CAK/W33 is a double-row spherical roller bearing with a 1:12 tapered bore, 460 mm nominal bore, 830 mm outer diameter and 296 mm width (18.11 × 32.677 × 11.654 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 8958 kN, C0 13700 kN, Pu 880 kN, reference speed 400 r/min, limiting speed 560 r/min, mass about 790000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K suffix mean on 23292-cak-w33?", "a": "K marks a 1:12 tapered bore for sleeve mounting — SKF writes EK or CCK(/W33), FAG writes -K- inside the suffix chain for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder. The rarer K30 suffix would instead mean a 1:30 taper; dimension series 40/41 spherical rollers commonly use it." }, { "q": "Which adapter sleeve fits the 23292-cak-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 460 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 23292-cak-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:12 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 23292-cak-w33 and 23292-cak-w33?", "a": "They share the ISO 15 envelope and the same 8958/13700 kN ratings, but 23292-cak-w33 has the 1:12 tapered bore for sleeve mounting on a plain shaft, while 23292-cak-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "23292", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:12) sleeve-mounted execution of 23292; identical ISO 15 envelope, fits OH3292 adapter sleeve on a 430 mm shaft." }, { "equiv_sku": "C3292-MB", "equiv_brand": "SKF", "level": "full", "note": "SKF CARB toroidal bearing C 3292 MB shares the 460×830×296 mm envelope with ratings within 10 %; it self-aligns but floats axially and cannot locate the shaft — locating/non-locating pair, not a substitute." }, { "equiv_sku": "C3292-KMB", "equiv_brand": "SKF", "level": "full", "note": "SKF CARB toroidal bearing C 3292 KMB shares the 460×830×296 mm envelope with ratings within 10 %; it self-aligns but floats axially and cannot locate the shaft — locating/non-locating pair, not a substitute." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.2 adapter-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "23292-CAK-W33", "SKF 23292 CAK/W33", "23292 K" ], "locale_variants": {} }, { "sku": "23996-CAK-W33", "brand": "SKF", "manufacturer_designation": "SKF 23996 CAK/W33", "series": "23900-series", "type": "spherical_roller", "d_mm": 480, "D_mm": 650, "B_mm": 128, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "brass_machined_M1", "dynamic_load_kN": 2990, "static_load_kN": 5700, "fatigue_load_limit_kN": 405, "max_rpm": 1000, "reference_speed_rpm": 560, "limiting_speed_rpm": 1000, "weight_g": 185000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "For sleeve mounting on a 480 mm shaft, SKF order number SKF 23996 CAK/W33 is the 1:12 tapered-bore spherical roller bearing in the 23900-series family (dimension series 39 (compact OD, narrow)); the cylindrical-bore equivalent is a separate order number, 23996-cak-w33. Reading the designation: the leading 2 marks a spherical roller bearing, the 39 is the ISO 15 dimension series (dimension series 39 (compact OD, narrow)), and the last two digits encode the 480 mm bore; the 650 mm OD and 128 mm width follow the ISO 15 general plan. Note that K means 1:12 taper; the rarer K30 suffix means 1:30. Adapter sleeves (H) and withdrawal sleeves (AH) are ordered separately by shaft diameter, and the KM locknut plus MB lock washer used for drive-up are also separate components. The 405 kN Pu figure feeds the adjusted-life equation at contaminated or partial-film conditions, and the 1.91 C0/C balance shows this execution is tuned to heavy radial-plus-axial duty with misalignment tolerance. For shafts with a locating shoulder, use an AH withdrawal sleeve instead of an adapter sleeve: the bearing presses against the shoulder and the sleeve is drawn out for dismounting, making the 23996-cak-w33 removable without an induction heater.", "applications": [ "steel-plant continuous-caster segments", "large induced-draft fan rotors", "shafting produced to commercial tolerances, where the adapter sleeve supplies the precision seat", "split-housing plummer block arrangements with bearings swapped in situ" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "sleeve seizure and shaft seat damage from omitting the anti-seize film between withdrawal sleeve and journal before drive-up", "roller-end scoring from starved lubricant at start-up before the grease channel purges", "seal-lip wear and grease purge loss when an open bearing is run without functioning housing seals" ], "pitfalls": [ "At 480 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 23900-series series at 480 mm bore (650×128 mm) is the slim-OD envelope: it buys radial space but gives up capacity against a 222-series bearing of the same bore — confirm the L10 margin before downsizing into it.", "Never apply the drive-up or clearance-reduction figures for this 1:12 tapered 23996-cak-w33 to a bearing of the other taper (1:12 vs 1:30); the steeper taper moves far less clearance per nut turn and the targets come from different catalogue tables.", "Never apply the drive-up or clearance-reduction figures for this 1:12 tapered 23996-cak-w33 to a bearing of the other taper (1:12 vs 1:30); the steeper taper moves far less clearance per nut turn and the targets come from different catalogue tables.", "The 23996-cak-w33 shares its ISO 15 envelope across brands, but internal geometry differs — SKF load ratings in this row are 2990/5700 kN; another maker's same-size bearing may rate higher or lower, so do not interchange on envelope alone.", "The 2990/5700 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 23996 CAK/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 23996-cak-w33?", "a": "The SKF 23996 CAK/W33 is a double-row spherical roller bearing with a 1:12 tapered bore, 480 mm nominal bore, 650 mm outer diameter and 128 mm width (18.898 × 25.591 × 5.039 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 2990 kN, C0 5700 kN, Pu 405 kN, reference speed 560 r/min, limiting speed 1,000 r/min, mass about 185000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K suffix mean on 23996-cak-w33?", "a": "K marks a 1:12 tapered bore for sleeve mounting — SKF writes EK or CCK(/W33), FAG writes -K- inside the suffix chain for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder. The rarer K30 suffix would instead mean a 1:30 taper; dimension series 40/41 spherical rollers commonly use it." }, { "q": "Which adapter sleeve fits the 23996-cak-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 480 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 23996-cak-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:12 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 23996-cak-w33 and 23996-cak-w33?", "a": "They share the ISO 15 envelope and the same 2990/5700 kN ratings, but 23996-cak-w33 has the 1:12 tapered bore for sleeve mounting on a plain shaft, while 23996-cak-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "23996-NTN", "equiv_brand": "NTN", "level": "partial", "note": "Same 480×650×128 mm envelope per ISO 15; catalogue load ratings differ by >10% — re-rate the application before substituting." }, { "equiv_sku": "23996", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:12) sleeve-mounted execution of 23996; identical ISO 15 envelope, fits OH3996 adapter sleeve on a 450 mm shaft." }, { "equiv_sku": "C3996-M", "equiv_brand": "SKF", "level": "full", "note": "SKF CARB toroidal bearing C 3996 M shares the 480×650×128 mm envelope with ratings within 10 %; it self-aligns but floats axially and cannot locate the shaft — locating/non-locating pair, not a substitute." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.2 adapter-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "23996-CAK-W33", "SKF 23996 CAK/W33", "23996 K" ], "locale_variants": {} }, { "sku": "23196-CAK-W33", "brand": "SKF", "manufacturer_designation": "SKF 23196 CAK/W33", "series": "23100-series", "type": "spherical_roller", "d_mm": 480, "D_mm": 790, "B_mm": 248, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "brass_machined_M1", "dynamic_load_kN": 7362, "static_load_kN": 12000, "fatigue_load_limit_kN": 780, "max_rpm": 750, "reference_speed_rpm": 400, "limiting_speed_rpm": 750, "weight_g": 590000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "SKF lists SKF 23196 CAK/W33 as the adapter-sleeve execution in the 23100-series range: a 480 mm nominal-bore spherical roller bearing whose 1:12 tapered inner ring is driven up a sleeve, with 790 mm OD and 248 mm width to the ISO 15 envelope. The code breaks down as type digit 2 (double-row spherical roller), dimension series 31 (dimension series 31 (medium OD, wide)), and bore code 96 = 480 mm; dimensions 480×790×248 mm therefore match the ISO 15 envelope. The K in the designation marks the 1:12 tapered bore: SKF mounts it on an H-series adapter sleeve (with KM locknut and MB lock washer) on a plain commercial-grade shaft, or on an AH withdrawal sleeve where the bearing must abut a shaft shoulder. Catalogue mass 590000 g for the 480×790×248 mm open execution covers the a one-piece machined brass cage guided on the inner ring (CA design); tapered-bore and sealed variants differ in mass and carry their own order numbers. At 480 mm bore, dismount after service is by KM locknut reversal or a hydraulic nut on larger sizes; oil-injection grooves on the bigger sleeves let pressurised oil float the 23196-cak-w33 off the taper without scoring either surface.", "applications": [ "large dredger and marine winch drums", "steel-plant continuous-caster segments", "split-housing plummer block arrangements with bearings swapped in situ", "heavy crusher and screen shafts mounted and dismounted with hydraulic nuts" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "sleeve seizure and shaft seat damage from omitting the anti-seize film between withdrawal sleeve and journal before drive-up", "roller-end scoring from starved lubricant at start-up before the grease channel purges", "rolling-contact fatigue spalling after the rated L10 life is exceeded" ], "pitfalls": [ "At 480 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 23100-series series at 480 mm bore (790×248 mm) is the medium-OD wide envelope for heavy continuous duty; it is wider than a 222 bearing in the same OD class, so housing width and spacer stack must be re-checked before substitution.", "The adapter sleeve is selected by actual shaft diameter, not by the 480 mm nominal bearing bore: H-sleeve part numbers span a small diameter range, so two different shaft diameters can use the same 23196-cak-w33 with different sleeves.", "Never apply the drive-up or clearance-reduction figures for this 1:12 tapered 23196-cak-w33 to a bearing of the other taper (1:12 vs 1:30); the steeper taper moves far less clearance per nut turn and the targets come from different catalogue tables.", "The self-aligning feature is not a license to ignore alignment: beyond ≈ 0.5–2.5° (series-dependent) the edge loading eats the fatigue margin, and seal drag grows as the rings tilt.", "The 7362/12000 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 23196 CAK/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 23196-cak-w33?", "a": "The SKF 23196 CAK/W33 is a double-row spherical roller bearing with a 1:12 tapered bore, 480 mm nominal bore, 790 mm outer diameter and 248 mm width (18.898 × 31.102 × 9.764 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 7362 kN, C0 12000 kN, Pu 780 kN, reference speed 400 r/min, limiting speed 750 r/min, mass about 590000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K suffix mean on 23196-cak-w33?", "a": "K marks a 1:12 tapered bore for sleeve mounting — SKF writes EK or CCK(/W33), FAG writes -K- inside the suffix chain for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder. The rarer K30 suffix would instead mean a 1:30 taper; dimension series 40/41 spherical rollers commonly use it." }, { "q": "Which adapter sleeve fits the 23196-cak-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 480 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 23196-cak-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:12 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 23196-cak-w33 and 23196-cak-w33?", "a": "They share the ISO 15 envelope and the same 7362/12000 kN ratings, but 23196-cak-w33 has the 1:12 tapered bore for sleeve mounting on a plain shaft, while 23196-cak-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "23196", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:12) sleeve-mounted execution of 23196; identical ISO 15 envelope, fits OH3196 adapter sleeve on a 450 mm shaft." }, { "equiv_sku": "C3196-MB", "equiv_brand": "SKF", "level": "full", "note": "SKF CARB toroidal bearing C 3196 MB shares the 480×790×248 mm envelope with ratings within 10 %; it self-aligns but floats axially and cannot locate the shaft — locating/non-locating pair, not a substitute." }, { "equiv_sku": "C3196-KMB", "equiv_brand": "SKF", "level": "full", "note": "SKF CARB toroidal bearing C 3196 KMB shares the 480×790×248 mm envelope with ratings within 10 %; it self-aligns but floats axially and cannot locate the shaft — locating/non-locating pair, not a substitute." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.2 adapter-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "23196-CAK-W33", "SKF 23196 CAK/W33", "23196 K" ], "locale_variants": {} }, { "sku": "23296-CAK-W33", "brand": "SKF", "manufacturer_designation": "SKF 23296 CAK/W33", "series": "23200-series", "type": "spherical_roller", "d_mm": 480, "D_mm": 870, "B_mm": 310, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "brass_machined_M1", "dynamic_load_kN": 9805, "static_load_kN": 15000, "fatigue_load_limit_kN": 950, "max_rpm": 530, "reference_speed_rpm": 380, "limiting_speed_rpm": 530, "weight_g": 935000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "For sleeve mounting on a 480 mm shaft, SKF order number SKF 23296 CAK/W33 is the 1:12 tapered-bore spherical roller bearing in the 23200-series family (dimension series 32 (medium OD, extra wide)); the cylindrical-bore equivalent is a separate order number, 23296-cak-w33. Reading the designation: the leading 2 marks a spherical roller bearing, the 32 is the ISO 15 dimension series (dimension series 32 (medium OD, extra wide)), and the last two digits encode the 480 mm bore; the 870 mm OD and 310 mm width follow the ISO 15 general plan. The K in the designation marks the 1:12 tapered bore: SKF mounts it on an H-series adapter sleeve (with KM locknut and MB lock washer) on a plain commercial-grade shaft, or on an AH withdrawal sleeve where the bearing must abut a shaft shoulder. The 195.0 mm radial section height ((870−480)/2) and 935000 g catalogue mass frame a 480 mm bore bearing rated at 9805 kN C — roughly 20.43 kN of dynamic capacity per millimetre of bore before application factors. Over-driving the 23296-cak-w33 up its sleeve pinches radial clearance below the residual minimum and can crack the inner ring in service; under-driving leaves the sleeve seat loose, so the ring creeps and frets the sleeve — measure, do not estimate.", "applications": [ "wind-turbine main shaft support", "heavy rolling-mill work-roll chocks", "fan and pulley shafts that need periodic bearing removal in the field", "shafting produced to commercial tolerances, where the adapter sleeve supplies the precision seat" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "inner-ring circumferential cracking after over-drive on the tapered seat removes too much radial clearance and the bearing runs preloaded", "surface distress and smearing when the relubrication interval is exceeded — the W33 groove is only effective if grease actually reaches the roller rows", "rolling-contact fatigue spalling after the rated L10 life is exceeded" ], "pitfalls": [ "At 480 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 23200-series series at 480 mm bore (870×310 mm) adds still more width for shock-loaded and vibratory loads; it does not interchange with a 231 bearing of the same bore because the 310 mm width changes abutment spacing, even though the 870 mm OD matches.", "Never apply the drive-up or clearance-reduction figures for this 1:12 tapered 23296-cak-w33 to a bearing of the other taper (1:12 vs 1:30); the steeper taper moves far less clearance per nut turn and the targets come from different catalogue tables.", "The adapter sleeve is selected by actual shaft diameter, not by the 480 mm nominal bearing bore: H-sleeve part numbers span a small diameter range, so two different shaft diameters can use the same 23296-cak-w33 with different sleeves.", "Shaft and housing fillets must clear the bearing chamfer so the 310 mm-wide rings seat square; use an undercut or withdrawal groove rather than an oversized radius that locks on the ring face.", "The 9805/15000 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 23296 CAK/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 23296-cak-w33?", "a": "The SKF 23296 CAK/W33 is a double-row spherical roller bearing with a 1:12 tapered bore, 480 mm nominal bore, 870 mm outer diameter and 310 mm width (18.898 × 34.252 × 12.205 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 9805 kN, C0 15000 kN, Pu 950 kN, reference speed 380 r/min, limiting speed 530 r/min, mass about 935000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K suffix mean on 23296-cak-w33?", "a": "K marks a 1:12 tapered bore for sleeve mounting — SKF writes EK or CCK(/W33), FAG writes -K- inside the suffix chain for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder. The rarer K30 suffix would instead mean a 1:30 taper; dimension series 40/41 spherical rollers commonly use it." }, { "q": "Which adapter sleeve fits the 23296-cak-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 480 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 23296-cak-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:12 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 23296-cak-w33 and 23296-cak-w33?", "a": "They share the ISO 15 envelope and the same 9805/15000 kN ratings, but 23296-cak-w33 has the 1:12 tapered bore for sleeve mounting on a plain shaft, while 23296-cak-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "23296", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:12) sleeve-mounted execution of 23296; identical ISO 15 envelope, fits OH3296 adapter sleeve on a 450 mm shaft." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.2 adapter-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "23296-CAK-W33", "SKF 23296 CAK/W33", "23296 K" ], "locale_variants": {} }, { "sku": "24122-CCK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24122 CCK30/W33", "series": "24100-series", "type": "spherical_roller", "d_mm": 110, "D_mm": 180, "B_mm": 69, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 539, "static_load_kN": 750, "fatigue_load_limit_kN": 78, "max_rpm": 3000, "reference_speed_rpm": 2000, "limiting_speed_rpm": 3000, "weight_g": 7700, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "24122-cck30-w33 is the 1:30 tapered-bore execution of the 24100-series spherical roller bearing: the same two barrel-roller rows on a sphered outer raceway as 24122-cc-w33, but the inner-ring bore tapers 1 mm per 30 mm for adapter- or withdrawal-sleeve mounting, as listed by SKF in SKF catalogue PUB BU/P1 17000. Reading the designation: the leading 2 marks a spherical roller bearing, the 41 is the ISO 15 dimension series (dimension series 41 (medium OD, maximum width)), and the last two digits encode the 110 mm bore; the 180 mm OD and 69 mm width follow the ISO 15 general plan. The K30 in the designation marks the 1:30 tapered bore: SKF mounts it on an H-series adapter sleeve (with KM locknut and MB lock washer) on a plain commercial-grade shaft, or on an AH withdrawal sleeve where the bearing must abut a shaft shoulder. At 2,000 r/min reference speed the 35.0 mm-section 24122-cck30-w33 is governed thermally by lubricant flow through the W33 groove and the two-row roller complement; grease or oil selection should be made against that value, with 3,000 r/min as the mechanical ceiling. At 110 mm bore, dismount after service is by KM locknut reversal or a hydraulic nut on larger sizes; oil-injection grooves on the bigger sleeves let pressurised oil float the 24122-cck30-w33 off the taper without scoring either surface.", "applications": [ "heavy conveyor head shafts in mining", "jaw and cone crusher main shafts", "long through-shafts in conveyors, where a sleeve seat avoids a precision journal", "stepped shafts fitted with withdrawal sleeves against a fixed shoulder" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "fretting corrosion and sleeve-seat scoring when drive-up is insufficient and the tapered inner ring creeps on the adapter sleeve", "surface distress and smearing when the relubrication interval is exceeded — the W33 groove is only effective if grease actually reaches the roller rows", "hard-particle indentation of the raceway in unfiltered oil or contaminated grease systems" ], "pitfalls": [ "Mount the 110 mm bore 24122-cck30-w33 by induction heating (max 120 °C) or oil injection — driving a bearing of this section home through the rollers brinells both raceways, and the damage only speaks up as vibration hours later.", "The 24100-series series at 110 mm bore (180×69 mm) is the heaviest medium-OD execution, built for extreme radial and shock loads at low speed; the 3,000 r/min ceiling is part of the design, not an afterthought — check it before using it in a faster drive.", "The 24122-cck30-w33 and its cylindrical-bore counterpart 24122-cc-w33 share envelope and load ratings (539/750 kN) but are not interchangeable in a housing already fitted for direct shaft mounting — the sleeve changes the assembly stack-up.", "The 24122-cck30-w33 and its cylindrical-bore counterpart 24122-cc-w33 share envelope and load ratings (539/750 kN) but are not interchangeable in a housing already fitted for direct shaft mounting — the sleeve changes the assembly stack-up.", "The 7700 g mass and 69 mm width mean abutment faces must be square to the axis within the bearing's own P0 tolerance; a tilted spacer tilts the outer ring and concentrates load on one roller row of 24122-cck30-w33.", "The 539/750 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24122 CCK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24122-cck30-w33?", "a": "The SKF 24122 CCK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 110 mm nominal bore, 180 mm outer diameter and 69 mm width (4.331 × 7.087 × 2.717 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 539 kN, C0 750 kN, Pu 78 kN, reference speed 2,000 r/min, limiting speed 3,000 r/min, mass about 7700 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24122-cck30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24122-cck30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 110 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24122-cck30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24122-cck30-w33 and 24122-cc-w33?", "a": "They share the ISO 15 envelope and the same 539/750 kN ratings, but 24122-cck30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24122-cc-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24122", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24122; identical ISO 15 envelope, fits AH24122 withdrawal sleeve on a 105 mm shaft." }, { "equiv_sku": "C4122-2CS5V-GEM9", "equiv_brand": "SKF", "level": "full", "note": "SKF CARB toroidal bearing C 4122-2CS5V/GEM9 shares the 110×180×69 mm envelope with ratings within 10 %; it self-aligns but floats axially and cannot locate the shaft — locating/non-locating pair, not a substitute." }, { "equiv_sku": "C4122-V", "equiv_brand": "SKF", "level": "partial", "note": "SKF CARB toroidal bearing C 4122 V shares the 110×180×69 mm envelope but catalogue C/C0 differ (670/1000 kN vs 539/750 kN); it floats axially and cannot locate the shaft — pair, never swap one-for-one." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24122-CCK30-W33", "SKF 24122 CCK30/W33", "24122 K" ], "locale_variants": {} }, { "sku": "24024-CCK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24024 CCK30/W33", "series": "24000-series", "type": "spherical_roller", "d_mm": 120, "D_mm": 180, "B_mm": 60, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 456, "static_load_kN": 670, "fatigue_load_limit_kN": 68, "max_rpm": 3400, "reference_speed_rpm": 2400, "limiting_speed_rpm": 3400, "weight_g": 5950, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "For sleeve mounting on a 120 mm shaft, SKF order number SKF 24024 CCK30/W33 is the 1:30 tapered-bore spherical roller bearing in the 24000-series family (dimension series 40 (compact OD, maximum width)); the cylindrical-bore equivalent is a separate order number, 24024-cc-w33. Reading the designation: the leading 2 marks a spherical roller bearing, the 40 is the ISO 15 dimension series (dimension series 40 (compact OD, maximum width)), and the last two digits encode the 120 mm bore; the 180 mm OD and 60 mm width follow the ISO 15 general plan. The K30 in the designation marks the 1:30 tapered bore: SKF mounts it on an H-series adapter sleeve (with KM locknut and MB lock washer) on a plain commercial-grade shaft, or on an AH withdrawal sleeve where the bearing must abut a shaft shoulder. The 30.0 mm radial section height ((180−120)/2) and 5950 g catalogue mass frame a 120 mm bore bearing rated at 456 kN C — roughly 3.80 kN of dynamic capacity per millimetre of bore before application factors. For shafts with a locating shoulder, use an AH withdrawal sleeve instead of an adapter sleeve: the bearing presses against the shoulder and the sleeve is drawn out for dismounting, making the 24024-cck30-w33 removable without an induction heater.", "applications": [ "wind-turbine main shaft support", "heavy rolling-mill work-roll chocks", "split-housing plummer block arrangements with bearings swapped in situ", "heavy crusher and screen shafts mounted and dismounted with hydraulic nuts" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "sleeve seizure and shaft seat damage from omitting the anti-seize film between withdrawal sleeve and journal before drive-up", "surface distress and smearing when the relubrication interval is exceeded — the W33 groove is only effective if grease actually reaches the roller rows", "rolling-contact fatigue spalling after the rated L10 life is exceeded" ], "pitfalls": [ "At 120 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24000-series series at 120 mm bore (180×60 mm) packs maximum roller length into the smallest OD envelope — very high C0 for its size but the lowest speed ceiling; never swap it for a wider-OD 231 bearing without re-checking the housing bore and the speed margin.", "The adapter sleeve is selected by actual shaft diameter, not by the 120 mm nominal bearing bore: H-sleeve part numbers span a small diameter range, so two different shaft diameters can use the same 24024-cck30-w33 with different sleeves.", "The adapter sleeve is selected by actual shaft diameter, not by the 120 mm nominal bearing bore: H-sleeve part numbers span a small diameter range, so two different shaft diameters can use the same 24024-cck30-w33 with different sleeves.", "The 5950 g mass and 60 mm width mean abutment faces must be square to the axis within the bearing's own P0 tolerance; a tilted spacer tilts the outer ring and concentrates load on one roller row of 24024-cck30-w33.", "The 456/670 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24024 CCK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24024-cck30-w33?", "a": "The SKF 24024 CCK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 120 mm nominal bore, 180 mm outer diameter and 60 mm width (4.724 × 7.087 × 2.362 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 456 kN, C0 670 kN, Pu 68 kN, reference speed 2,400 r/min, limiting speed 3,400 r/min, mass about 5950 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24024-cck30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24024-cck30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 120 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24024-cck30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24024-cck30-w33 and 24024-cc-w33?", "a": "They share the ISO 15 envelope and the same 456/670 kN ratings, but 24024-cck30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24024-cc-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24024", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24024; identical ISO 15 envelope, fits AH24024 withdrawal sleeve on a 115 mm shaft." }, { "equiv_sku": "C4024-2CS5V-GEM9", "equiv_brand": "SKF", "level": "full", "note": "SKF CARB toroidal bearing C 4024-2CS5V/GEM9 shares the 120×180×60 mm envelope with ratings within 10 %; it self-aligns but floats axially and cannot locate the shaft — locating/non-locating pair, not a substitute." }, { "equiv_sku": "C4024-V-VE240", "equiv_brand": "SKF", "level": "full", "note": "SKF CARB toroidal bearing C 4024 V/VE240 shares the 120×180×60 mm envelope with ratings within 10 %; it self-aligns but floats axially and cannot locate the shaft — locating/non-locating pair, not a substitute." }, { "equiv_sku": "C4024-K30V-VE240", "equiv_brand": "SKF", "level": "full", "note": "SKF CARB toroidal bearing C 4024 K30V/VE240 shares the 120×180×60 mm envelope with ratings within 10 %; it self-aligns but floats axially and cannot locate the shaft — locating/non-locating pair, not a substitute." }, { "equiv_sku": "C4024-V", "equiv_brand": "SKF", "level": "partial", "note": "SKF CARB toroidal bearing C 4024 V shares the 120×180×60 mm envelope but catalogue C/C0 differ (530/880 kN vs 456/670 kN); it floats axially and cannot locate the shaft — pair, never swap one-for-one." }, { "equiv_sku": "C4024-K30V", "equiv_brand": "SKF", "level": "partial", "note": "SKF CARB toroidal bearing C 4024 K30V shares the 120×180×60 mm envelope but catalogue C/C0 differ (530/880 kN vs 456/670 kN); it floats axially and cannot locate the shaft — pair, never swap one-for-one." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24024-CCK30-W33", "SKF 24024 CCK30/W33", "24024 K" ], "locale_variants": {} }, { "sku": "24124-CCK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24124 CCK30/W33", "series": "24100-series", "type": "spherical_roller", "d_mm": 120, "D_mm": 200, "B_mm": 80, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 679, "static_load_kN": 950, "fatigue_load_limit_kN": 95, "max_rpm": 2600, "reference_speed_rpm": 1900, "limiting_speed_rpm": 2600, "weight_g": 11000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "In SKF catalogue PUB BU/P1 17000, 24124-cck30-w33 denotes the tapered-bore version (K30 suffix, taper 1:30) of the 24100-series spherical roller bearing: dimensioned 120×200×80 mm, it seats on an adapter or withdrawal sleeve rather than directly on a machined journal. Numbering ties the bearing to its envelope: 24124-cck30-w33 means spherical-roller type, dimension series 41, 120 mm bore — which is why the 200×80 mm outline swaps dimensionally with other ISO 15 bearings of the same code. Reading the suffix on 24124-cck30-w33, the K30 (or EK/CCK30) element changes only the bore — 1:30 taper for sleeve mounting — while the rest of the suffix chain (CC cages with W33 groove) keeps the same internal design, cage and W33 relubrication features as the cylindrical-bore 24124-cc-w33. With C 679 kN and C0 950 kN, the 24124-cck30-w33 load check covers radial plus moderate axial in either direction — but below the minimum load the rollers skid, so verify P ≥ 0.01·C0 at the lightest operating point. On an H adapter sleeve the 120 mm shaft seat only needs an h9 plain journal; slide the sleeve into the 24124-cck30-w33 inner ring, tighten the KM nut against the MB washer until the catalogue clearance-reduction value is reached, then lock the washer tab.", "applications": [ "heavy rolling-mill work-roll chocks", "large dredger and marine winch drums", "shafting produced to commercial tolerances, where the adapter sleeve supplies the precision seat", "split-housing plummer block arrangements with bearings swapped in situ" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "inner-ring circumferential cracking after over-drive on the tapered seat removes too much radial clearance and the bearing runs preloaded", "roller-end scoring from starved lubricant at start-up before the grease channel purges", "smearing on the roller-raceway contact during skid starts below the minimum load" ], "pitfalls": [ "At 120 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24100-series series at 120 mm bore (200×80 mm) is the heaviest medium-OD execution, built for extreme radial and shock loads at low speed; the 2,600 r/min ceiling is part of the design, not an afterthought — check it before using it in a faster drive.", "The adapter sleeve is selected by actual shaft diameter, not by the 120 mm nominal bearing bore: H-sleeve part numbers span a small diameter range, so two different shaft diameters can use the same 24124-cck30-w33 with different sleeves.", "A loose sleeve after the first weeks of service usually means inadequate initial drive-up; re-checking clearance without dismounting is possible through the 80 mm-wide roller rows with feeler gauges — do not simply tighten the KM nut until vibration stops.", "Shaft and housing fillets must clear the bearing chamfer so the 80 mm-wide rings seat square; use an undercut or withdrawal groove rather than an oversized radius that locks on the ring face.", "The 679/950 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24124 CCK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24124-cck30-w33?", "a": "The SKF 24124 CCK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 120 mm nominal bore, 200 mm outer diameter and 80 mm width (4.724 × 7.874 × 3.15 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 679 kN, C0 950 kN, Pu 95 kN, reference speed 1,900 r/min, limiting speed 2,600 r/min, mass about 11000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24124-cck30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24124-cck30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 120 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24124-cck30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24124-cck30-w33 and 24124-cc-w33?", "a": "They share the ISO 15 envelope and the same 679/950 kN ratings, but 24124-cck30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24124-cc-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24124", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24124; identical ISO 15 envelope, fits AH24124 withdrawal sleeve on a 115 mm shaft." }, { "equiv_sku": "C4124-V", "equiv_brand": "SKF", "level": "partial", "note": "SKF CARB toroidal bearing C 4124 V shares the 120×200×80 mm envelope but catalogue C/C0 differ (780/1120 kN vs 679/950 kN); it floats axially and cannot locate the shaft — pair, never swap one-for-one." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24124-CCK30-W33", "SKF 24124 CCK30/W33", "24124 K" ], "locale_variants": {} }, { "sku": "24026-CCK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24026 CCK30/W33", "series": "24000-series", "type": "spherical_roller", "d_mm": 130, "D_mm": 200, "B_mm": 69, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 569, "static_load_kN": 815, "fatigue_load_limit_kN": 81.5, "max_rpm": 3000, "reference_speed_rpm": 2000, "limiting_speed_rpm": 3000, "weight_g": 8650, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Ordering number SKF 24026 CCK30/W33 in SKF catalogue PUB BU/P1 17000 is a double-row spherical roller bearing with a tapered bore (1:30), intended for an H-series adapter sleeve or AH withdrawal sleeve, with two pressed-steel cages with a floating guide ring and the same 130×200×69 mm ISO 15 outline as its cylindrical-bore counterpart. Reading the designation: the leading 2 marks a spherical roller bearing, the 40 is the ISO 15 dimension series (dimension series 40 (compact OD, maximum width)), and the last two digits encode the 130 mm bore; the 200 mm OD and 69 mm width follow the ISO 15 general plan. The K30 in the designation marks the 1:30 tapered bore: SKF mounts it on an H-series adapter sleeve (with KM locknut and MB lock washer) on a plain commercial-grade shaft, or on an AH withdrawal sleeve where the bearing must abut a shaft shoulder. The 81.5 kN Pu figure feeds the adjusted-life equation at contaminated or partial-film conditions, and the 1.43 C0/C balance shows this execution is tuned to heavy radial-plus-axial duty with misalignment tolerance. At 130 mm bore, dismount after service is by KM locknut reversal or a hydraulic nut on larger sizes; oil-injection grooves on the bigger sleeves let pressurised oil float the 24026-cck30-w33 off the taper without scoring either surface.", "applications": [ "steel-plant continuous-caster segments", "large induced-draft fan rotors", "long through-shafts in conveyors, where a sleeve seat avoids a precision journal", "stepped shafts fitted with withdrawal sleeves against a fixed shoulder" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "sleeve seizure and shaft seat damage from omitting the anti-seize film between withdrawal sleeve and journal before drive-up", "roller-end scoring from starved lubricant at start-up before the grease channel purges", "hard-particle indentation of the raceway in unfiltered oil or contaminated grease systems" ], "pitfalls": [ "At 130 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24000-series series at 130 mm bore (200×69 mm) packs maximum roller length into the smallest OD envelope — very high C0 for its size but the lowest speed ceiling; never swap it for a wider-OD 231 bearing without re-checking the housing bore and the speed margin.", "A loose sleeve after the first weeks of service usually means inadequate initial drive-up; re-checking clearance without dismounting is possible through the 69 mm-wide roller rows with feeler gauges — do not simply tighten the KM nut until vibration stops.", "Never apply the drive-up or clearance-reduction figures for this 1:30 tapered 24026-cck30-w33 to a bearing of the other taper (1:12 vs 1:30); the steeper taper moves far less clearance per nut turn and the targets come from different catalogue tables.", "Shaft and housing fillets must clear the bearing chamfer so the 69 mm-wide rings seat square; use an undercut or withdrawal groove rather than an oversized radius that locks on the ring face.", "The 569/815 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24026 CCK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24026-cck30-w33?", "a": "The SKF 24026 CCK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 130 mm nominal bore, 200 mm outer diameter and 69 mm width (5.118 × 7.874 × 2.717 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 569 kN, C0 815 kN, Pu 81.5 kN, reference speed 2,000 r/min, limiting speed 3,000 r/min, mass about 8650 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24026-cck30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24026-cck30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 130 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24026-cck30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24026-cck30-w33 and 24026-cc-w33?", "a": "They share the ISO 15 envelope and the same 569/815 kN ratings, but 24026-cck30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24026-cc-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24026", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24026; identical ISO 15 envelope, fits AH24026 withdrawal sleeve on a 125 mm shaft." }, { "equiv_sku": "C4026-2CS5V-GEM9", "equiv_brand": "SKF", "level": "full", "note": "SKF CARB toroidal bearing C 4026-2CS5V/GEM9 shares the 130×200×69 mm envelope with ratings within 10 %; it self-aligns but floats axially and cannot locate the shaft — locating/non-locating pair, not a substitute." }, { "equiv_sku": "C4026", "equiv_brand": "SKF", "level": "partial", "note": "SKF CARB toroidal bearing C 4026 shares the 130×200×69 mm envelope but catalogue C/C0 differ (620/930 kN vs 569/815 kN); it floats axially and cannot locate the shaft — pair, never swap one-for-one." }, { "equiv_sku": "C4026-K30", "equiv_brand": "SKF", "level": "partial", "note": "SKF CARB toroidal bearing C 4026 K30 shares the 130×200×69 mm envelope but catalogue C/C0 differ (620/930 kN vs 569/815 kN); it floats axially and cannot locate the shaft — pair, never swap one-for-one." }, { "equiv_sku": "C4026-V", "equiv_brand": "SKF", "level": "partial", "note": "SKF CARB toroidal bearing C 4026 V shares the 130×200×69 mm envelope but catalogue C/C0 differ (720/1120 kN vs 569/815 kN); it floats axially and cannot locate the shaft — pair, never swap one-for-one." }, { "equiv_sku": "C4026-K30V", "equiv_brand": "SKF", "level": "partial", "note": "SKF CARB toroidal bearing C 4026 K30V shares the 130×200×69 mm envelope but catalogue C/C0 differ (720/1120 kN vs 569/815 kN); it floats axially and cannot locate the shaft — pair, never swap one-for-one." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24026-CCK30-W33", "SKF 24026 CCK30/W33", "24026 K" ], "locale_variants": {} }, { "sku": "24126-CCK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24126 CCK30/W33", "series": "24100-series", "type": "spherical_roller", "d_mm": 130, "D_mm": 210, "B_mm": 80, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 699, "static_load_kN": 1000, "fatigue_load_limit_kN": 100, "max_rpm": 2400, "reference_speed_rpm": 1700, "limiting_speed_rpm": 2400, "weight_g": 11500, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "SKF lists SKF 24126 CCK30/W33 as the adapter-sleeve execution in the 24100-series range: a 130 mm nominal-bore spherical roller bearing whose 1:30 tapered inner ring is driven up a sleeve, with 210 mm OD and 80 mm width to the ISO 15 envelope. Numbering ties the bearing to its envelope: 24126-cck30-w33 means spherical-roller type, dimension series 41, 130 mm bore — which is why the 210×80 mm outline swaps dimensionally with other ISO 15 bearings of the same code. Reading the suffix on 24126-cck30-w33, the K30 (or EK/CCK30) element changes only the bore — 1:30 taper for sleeve mounting — while the rest of the suffix chain (CC cages with W33 groove) keeps the same internal design, cage and W33 relubrication features as the cylindrical-bore 24126-cc-w33. At 1,700 r/min reference speed the 40.0 mm-section 24126-cck30-w33 is governed thermally by lubricant flow through the W33 groove and the two-row roller complement; grease or oil selection should be made against that value, with 2,400 r/min as the mechanical ceiling. Over-driving the 24126-cck30-w33 up its sleeve pinches radial clearance below the residual minimum and can crack the inner ring in service; under-driving leaves the sleeve seat loose, so the ring creeps and frets the sleeve — measure, do not estimate.", "applications": [ "large induced-draft fan rotors", "SAG and ball-mill drive shafts", "heavy crusher and screen shafts mounted and dismounted with hydraulic nuts", "long through-shafts in conveyors, where a sleeve seat avoids a precision journal" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "inner-ring circumferential cracking after over-drive on the tapered seat removes too much radial clearance and the bearing runs preloaded", "surface distress and smearing when the relubrication interval is exceeded — the W33 groove is only effective if grease actually reaches the roller rows", "brinelling from static overload or impact during handling and mounting" ], "pitfalls": [ "At 130 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24100-series series at 130 mm bore (210×80 mm) is the heaviest medium-OD execution, built for extreme radial and shock loads at low speed; the 2,400 r/min ceiling is part of the design, not an afterthought — check it before using it in a faster drive.", "A loose sleeve after the first weeks of service usually means inadequate initial drive-up; re-checking clearance without dismounting is possible through the 80 mm-wide roller rows with feeler gauges — do not simply tighten the KM nut until vibration stops.", "The adapter sleeve is selected by actual shaft diameter, not by the 130 mm nominal bearing bore: H-sleeve part numbers span a small diameter range, so two different shaft diameters can use the same 24126-cck30-w33 with different sleeves.", "The 24126-cck30-w33 shares its ISO 15 envelope across brands, but internal geometry differs — SKF load ratings in this row are 699/1000 kN; another maker's same-size bearing may rate higher or lower, so do not interchange on envelope alone.", "The 699/1000 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24126 CCK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24126-cck30-w33?", "a": "The SKF 24126 CCK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 130 mm nominal bore, 210 mm outer diameter and 80 mm width (5.118 × 8.268 × 3.15 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 699 kN, C0 1000 kN, Pu 100 kN, reference speed 1,700 r/min, limiting speed 2,400 r/min, mass about 11500 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24126-cck30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24126-cck30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 130 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24126-cck30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24126-cck30-w33 and 24126-cc-w33?", "a": "They share the ISO 15 envelope and the same 699/1000 kN ratings, but 24126-cck30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24126-cc-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24126", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24126; identical ISO 15 envelope, fits AH24126 withdrawal sleeve on a 125 mm shaft." }, { "equiv_sku": "C4126-2CS5V-GEM9", "equiv_brand": "SKF", "level": "full", "note": "SKF CARB toroidal bearing C 4126-2CS5V/GEM9 shares the 130×210×80 mm envelope with ratings within 10 %; it self-aligns but floats axially and cannot locate the shaft — locating/non-locating pair, not a substitute." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24126-CCK30-W33", "SKF 24126 CCK30/W33", "24126 K" ], "locale_variants": {} }, { "sku": "24028-CCK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24028 CCK30/W33", "series": "24000-series", "type": "spherical_roller", "d_mm": 140, "D_mm": 210, "B_mm": 69, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 600, "static_load_kN": 900, "fatigue_load_limit_kN": 88, "max_rpm": 2800, "reference_speed_rpm": 2000, "limiting_speed_rpm": 2800, "weight_g": 9200, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The SKF 24028 CCK30/W33 is a 140×210×69 mm spherical roller bearing with a 1:30 tapered bore — SKF catalogue execution for sleeve mounting on a 140 mm plain shaft, retaining the double-row self-aligning barrel-roller design. Numbering ties the bearing to its envelope: 24028-cck30-w33 means spherical-roller type, dimension series 40, 140 mm bore — which is why the 210×69 mm outline swaps dimensionally with other ISO 15 bearings of the same code. Reading the suffix on 24028-cck30-w33, the K30 (or EK/CCK30) element changes only the bore — 1:30 taper for sleeve mounting — while the rest of the suffix chain (CC cages with W33 groove) keeps the same internal design, cage and W33 relubrication features as the cylindrical-bore 24028-cc-w33. The 35.0 mm radial section height ((210−140)/2) and 9200 g catalogue mass frame a 140 mm bore bearing rated at 600 kN C — roughly 4.29 kN of dynamic capacity per millimetre of bore before application factors. On an H adapter sleeve the 140 mm shaft seat only needs an h9 plain journal; slide the sleeve into the 24028-cck30-w33 inner ring, tighten the KM nut against the MB washer until the catalogue clearance-reduction value is reached, then lock the washer tab.", "applications": [ "wind-turbine main shaft support", "heavy rolling-mill work-roll chocks", "shafting produced to commercial tolerances, where the adapter sleeve supplies the precision seat", "split-housing plummer block arrangements with bearings swapped in situ" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "fretting corrosion and sleeve-seat scoring when drive-up is insufficient and the tapered inner ring creeps on the adapter sleeve", "surface distress and smearing when the relubrication interval is exceeded — the W33 groove is only effective if grease actually reaches the roller rows", "smearing on the roller-raceway contact during skid starts below the minimum load" ], "pitfalls": [ "At 140 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24000-series series at 140 mm bore (210×69 mm) packs maximum roller length into the smallest OD envelope — very high C0 for its size but the lowest speed ceiling; never swap it for a wider-OD 231 bearing without re-checking the housing bore and the speed margin.", "Never apply the drive-up or clearance-reduction figures for this 1:30 tapered 24028-cck30-w33 to a bearing of the other taper (1:12 vs 1:30); the steeper taper moves far less clearance per nut turn and the targets come from different catalogue tables.", "The 24028-cck30-w33 and its cylindrical-bore counterpart 24028-cc-w33 share envelope and load ratings (600/900 kN) but are not interchangeable in a housing already fitted for direct shaft mounting — the sleeve changes the assembly stack-up.", "The 24028-cck30-w33 shares its ISO 15 envelope across brands, but internal geometry differs — SKF load ratings in this row are 600/900 kN; another maker's same-size bearing may rate higher or lower, so do not interchange on envelope alone.", "The 600/900 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24028 CCK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24028-cck30-w33?", "a": "The SKF 24028 CCK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 140 mm nominal bore, 210 mm outer diameter and 69 mm width (5.512 × 8.268 × 2.717 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 600 kN, C0 900 kN, Pu 88 kN, reference speed 2,000 r/min, limiting speed 2,800 r/min, mass about 9200 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24028-cck30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24028-cck30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 140 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24028-cck30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24028-cck30-w33 and 24028-cc-w33?", "a": "They share the ISO 15 envelope and the same 600/900 kN ratings, but 24028-cck30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24028-cc-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24028", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24028; identical ISO 15 envelope, fits AH24028 withdrawal sleeve on a 135 mm shaft." }, { "equiv_sku": "C4028-V", "equiv_brand": "SKF", "level": "partial", "note": "SKF CARB toroidal bearing C 4028 V shares the 140×210×69 mm envelope but catalogue C/C0 differ (750/1220 kN vs 600/900 kN); it floats axially and cannot locate the shaft — pair, never swap one-for-one." }, { "equiv_sku": "C4028-K30V", "equiv_brand": "SKF", "level": "partial", "note": "SKF CARB toroidal bearing C 4028 K30V shares the 140×210×69 mm envelope but catalogue C/C0 differ (750/1220 kN vs 600/900 kN); it floats axially and cannot locate the shaft — pair, never swap one-for-one." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24028-CCK30-W33", "SKF 24028 CCK30/W33", "24028 K" ], "locale_variants": {} }, { "sku": "24128-CCK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24128 CCK30/W33", "series": "24100-series", "type": "spherical_roller", "d_mm": 140, "D_mm": 225, "B_mm": 85, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 796, "static_load_kN": 1160, "fatigue_load_limit_kN": 112, "max_rpm": 2200, "reference_speed_rpm": 1600, "limiting_speed_rpm": 2200, "weight_g": 14500, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Ordering number SKF 24128 CCK30/W33 in SKF catalogue PUB BU/P1 17000 is a double-row spherical roller bearing with a tapered bore (1:30), intended for an H-series adapter sleeve or AH withdrawal sleeve, with two pressed-steel cages with a floating guide ring and the same 140×225×85 mm ISO 15 outline as its cylindrical-bore counterpart. The code breaks down as type digit 2 (double-row spherical roller), dimension series 41 (dimension series 41 (medium OD, maximum width)), and bore code 28 = 140 mm; dimensions 140×225×85 mm therefore match the ISO 15 envelope. Sleeve mounting is why the K30 execution exists: a plain h9-tolerance shaft is enough because the adapter sleeve supplies the precision seat, and the bearing is removable without pulling over an interference journal — a separate order number from the cylindrical-bore bearing, never a field conversion. With C 796 kN and C0 1160 kN, the 24128-cck30-w33 load check covers radial plus moderate axial in either direction — but below the minimum load the rollers skid, so verify P ≥ 0.01·C0 at the lightest operating point. Because driving up the 1:30 taper consumes radial clearance, K30 executions are commonly ordered with C3 initial clearance so the residual running clearance after mounting matches the cylindrical-bore 24128-cc-w33 on an interference seat.", "applications": [ "heavy rolling-mill work-roll chocks", "large dredger and marine winch drums", "fan and pulley shafts that need periodic bearing removal in the field", "shafting produced to commercial tolerances, where the adapter sleeve supplies the precision seat" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "sleeve seizure and shaft seat damage from omitting the anti-seize film between withdrawal sleeve and journal before drive-up", "roller-end scoring from starved lubricant at start-up before the grease channel purges", "fretting corrosion on a loose rotating shaft seat or in vibratory stand-still" ], "pitfalls": [ "At 140 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24100-series series at 140 mm bore (225×85 mm) is the heaviest medium-OD execution, built for extreme radial and shock loads at low speed; the 2,200 r/min ceiling is part of the design, not an afterthought — check it before using it in a faster drive.", "Never apply the drive-up or clearance-reduction figures for this 1:30 tapered 24128-cck30-w33 to a bearing of the other taper (1:12 vs 1:30); the steeper taper moves far less clearance per nut turn and the targets come from different catalogue tables.", "Never apply the drive-up or clearance-reduction figures for this 1:30 tapered 24128-cck30-w33 to a bearing of the other taper (1:12 vs 1:30); the steeper taper moves far less clearance per nut turn and the targets come from different catalogue tables.", "Open spherical roller bearings rely on the housing seals; in screening or crusher duty a failed seal lets grit into the sphered raceway and the 24128-cck30-w33 pits long before its L10 life.", "The 796/1160 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24128 CCK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24128-cck30-w33?", "a": "The SKF 24128 CCK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 140 mm nominal bore, 225 mm outer diameter and 85 mm width (5.512 × 8.858 × 3.346 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 796 kN, C0 1160 kN, Pu 112 kN, reference speed 1,600 r/min, limiting speed 2,200 r/min, mass about 14500 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24128-cck30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24128-cck30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 140 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24128-cck30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24128-cck30-w33 and 24128-cc-w33?", "a": "They share the ISO 15 envelope and the same 796/1160 kN ratings, but 24128-cck30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24128-cc-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24128", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24128; identical ISO 15 envelope, fits AH24128 withdrawal sleeve on a 135 mm shaft." }, { "equiv_sku": "C4128-2CS5V-GEM9", "equiv_brand": "SKF", "level": "full", "note": "SKF CARB toroidal bearing C 4128-2CS5V/GEM9 shares the 140×225×85 mm envelope with ratings within 10 %; it self-aligns but floats axially and cannot locate the shaft — locating/non-locating pair, not a substitute." }, { "equiv_sku": "C4128-V-VE240", "equiv_brand": "SKF", "level": "full", "note": "SKF CARB toroidal bearing C 4128 V/VE240 shares the 140×225×85 mm envelope with ratings within 10 %; it self-aligns but floats axially and cannot locate the shaft — locating/non-locating pair, not a substitute." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24128-CCK30-W33", "SKF 24128 CCK30/W33", "24128 K" ], "locale_variants": {} }, { "sku": "24030-CCK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24030 CCK30/W33", "series": "24000-series", "type": "spherical_roller", "d_mm": 150, "D_mm": 225, "B_mm": 75, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 680, "static_load_kN": 1040, "fatigue_load_limit_kN": 100, "max_rpm": 2600, "reference_speed_rpm": 1800, "limiting_speed_rpm": 2600, "weight_g": 11500, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The SKF 24030 CCK30/W33 is a 150×225×75 mm spherical roller bearing with a 1:30 tapered bore — SKF catalogue execution for sleeve mounting on a 150 mm plain shaft, retaining the double-row self-aligning barrel-roller design. Reading the designation: the leading 2 marks a spherical roller bearing, the 40 is the ISO 15 dimension series (dimension series 40 (compact OD, maximum width)), and the last two digits encode the 150 mm bore; the 225 mm OD and 75 mm width follow the ISO 15 general plan. Reading the suffix on 24030-cck30-w33, the K30 (or EK/CCK30) element changes only the bore — 1:30 taper for sleeve mounting — while the rest of the suffix chain (CC cages with W33 groove) keeps the same internal design, cage and W33 relubrication features as the cylindrical-bore 24030-cc-w33. The 37.5 mm radial section height ((225−150)/2) and 11500 g catalogue mass frame a 150 mm bore bearing rated at 680 kN C — roughly 4.53 kN of dynamic capacity per millimetre of bore before application factors. For shafts with a locating shoulder, use an AH withdrawal sleeve instead of an adapter sleeve: the bearing presses against the shoulder and the sleeve is drawn out for dismounting, making the 24030-cck30-w33 removable without an induction heater.", "applications": [ "wind-turbine main shaft support", "heavy rolling-mill work-roll chocks", "heavy crusher and screen shafts mounted and dismounted with hydraulic nuts", "long through-shafts in conveyors, where a sleeve seat avoids a precision journal" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "inner-ring circumferential cracking after over-drive on the tapered seat removes too much radial clearance and the bearing runs preloaded", "surface distress and smearing when the relubrication interval is exceeded — the W33 groove is only effective if grease actually reaches the roller rows", "brinelling from static overload or impact during handling and mounting" ], "pitfalls": [ "At 150 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24000-series series at 150 mm bore (225×75 mm) packs maximum roller length into the smallest OD envelope — very high C0 for its size but the lowest speed ceiling; never swap it for a wider-OD 231 bearing without re-checking the housing bore and the speed margin.", "Never apply the drive-up or clearance-reduction figures for this 1:30 tapered 24030-cck30-w33 to a bearing of the other taper (1:12 vs 1:30); the steeper taper moves far less clearance per nut turn and the targets come from different catalogue tables.", "The 24030-cck30-w33 and its cylindrical-bore counterpart 24030-cc-w33 share envelope and load ratings (680/1040 kN) but are not interchangeable in a housing already fitted for direct shaft mounting — the sleeve changes the assembly stack-up.", "Shaft and housing fillets must clear the bearing chamfer so the 75 mm-wide rings seat square; use an undercut or withdrawal groove rather than an oversized radius that locks on the ring face.", "The 680/1040 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24030 CCK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24030-cck30-w33?", "a": "The SKF 24030 CCK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 150 mm nominal bore, 225 mm outer diameter and 75 mm width (5.906 × 8.858 × 2.953 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 680 kN, C0 1040 kN, Pu 100 kN, reference speed 1,800 r/min, limiting speed 2,600 r/min, mass about 11500 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24030-cck30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24030-cck30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 150 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24030-cck30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24030-cck30-w33 and 24030-cc-w33?", "a": "They share the ISO 15 envelope and the same 680/1040 kN ratings, but 24030-cck30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24030-cc-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24030", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24030; identical ISO 15 envelope, fits AH24030 withdrawal sleeve on a 145 mm shaft." }, { "equiv_sku": "C4030-2CS5V-GEM9", "equiv_brand": "SKF", "level": "partial", "note": "SKF CARB toroidal bearing C 4030-2CS5V/GEM9 shares the 150×225×75 mm envelope but catalogue C/C0 differ (585/965 kN vs 680/1040 kN); it floats axially and cannot locate the shaft — pair, never swap one-for-one." }, { "equiv_sku": "C4030-V", "equiv_brand": "SKF", "level": "partial", "note": "SKF CARB toroidal bearing C 4030 V shares the 150×225×75 mm envelope but catalogue C/C0 differ (780/1320 kN vs 680/1040 kN); it floats axially and cannot locate the shaft — pair, never swap one-for-one." }, { "equiv_sku": "C4030-K30V", "equiv_brand": "SKF", "level": "partial", "note": "SKF CARB toroidal bearing C 4030 K30V shares the 150×225×75 mm envelope but catalogue C/C0 differ (780/1320 kN vs 680/1040 kN); it floats axially and cannot locate the shaft — pair, never swap one-for-one." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24030-CCK30-W33", "SKF 24030 CCK30/W33", "24030 K" ], "locale_variants": {} }, { "sku": "24130-CCK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24130 CCK30/W33", "series": "24100-series", "type": "spherical_roller", "d_mm": 150, "D_mm": 250, "B_mm": 100, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 1054, "static_load_kN": 1530, "fatigue_load_limit_kN": 146, "max_rpm": 2000, "reference_speed_rpm": 1400, "limiting_speed_rpm": 2000, "weight_g": 21000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Ordering number SKF 24130 CCK30/W33 in SKF catalogue PUB BU/P1 17000 is a double-row spherical roller bearing with a tapered bore (1:30), intended for an H-series adapter sleeve or AH withdrawal sleeve, with two pressed-steel cages with a floating guide ring and the same 150×250×100 mm ISO 15 outline as its cylindrical-bore counterpart. Numbering ties the bearing to its envelope: 24130-cck30-w33 means spherical-roller type, dimension series 41, 150 mm bore — which is why the 250×100 mm outline swaps dimensionally with other ISO 15 bearings of the same code. Note that K30 means the 1:30 taper used on dimension series 40/41; the more common K means 1:12. Adapter sleeves (H) and withdrawal sleeves (AH) are ordered separately by shaft diameter, and the KM locknut plus MB lock washer used for drive-up are also separate components. Catalogue mass 21000 g for the 150×250×100 mm open execution covers the two pressed-steel cages with a floating guide ring; tapered-bore and sealed variants differ in mass and carry their own order numbers. Over-driving the 24130-cck30-w33 up its sleeve pinches radial clearance below the residual minimum and can crack the inner ring in service; under-driving leaves the sleeve seat loose, so the ring creeps and frets the sleeve — measure, do not estimate.", "applications": [ "large dredger and marine winch drums", "steel-plant continuous-caster segments", "heavy crusher and screen shafts mounted and dismounted with hydraulic nuts", "long through-shafts in conveyors, where a sleeve seat avoids a precision journal" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "fretting corrosion and sleeve-seat scoring when drive-up is insufficient and the tapered inner ring creeps on the adapter sleeve", "surface distress and smearing when the relubrication interval is exceeded — the W33 groove is only effective if grease actually reaches the roller rows", "seal-lip wear and grease purge loss when an open bearing is run without functioning housing seals" ], "pitfalls": [ "At 150 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24100-series series at 150 mm bore (250×100 mm) is the heaviest medium-OD execution, built for extreme radial and shock loads at low speed; the 2,000 r/min ceiling is part of the design, not an afterthought — check it before using it in a faster drive.", "Never apply the drive-up or clearance-reduction figures for this 1:30 tapered 24130-cck30-w33 to a bearing of the other taper (1:12 vs 1:30); the steeper taper moves far less clearance per nut turn and the targets come from different catalogue tables.", "The adapter sleeve is selected by actual shaft diameter, not by the 150 mm nominal bearing bore: H-sleeve part numbers span a small diameter range, so two different shaft diameters can use the same 24130-cck30-w33 with different sleeves.", "Catalogue reference speed and limiting speed are different limits: the 1,400 r/min reference is a thermal criterion under load, while the 2,000 r/min limiting value is the mechanical ceiling — observe both.", "The 1054/1530 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24130 CCK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24130-cck30-w33?", "a": "The SKF 24130 CCK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 150 mm nominal bore, 250 mm outer diameter and 100 mm width (5.906 × 9.843 × 3.937 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 1054 kN, C0 1530 kN, Pu 146 kN, reference speed 1,400 r/min, limiting speed 2,000 r/min, mass about 21000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24130-cck30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24130-cck30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 150 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24130-cck30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24130-cck30-w33 and 24130-cc-w33?", "a": "They share the ISO 15 envelope and the same 1054/1530 kN ratings, but 24130-cck30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24130-cc-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24130", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24130; identical ISO 15 envelope, fits AH24130 withdrawal sleeve on a 145 mm shaft." }, { "equiv_sku": "C4130-V", "equiv_brand": "SKF", "level": "partial", "note": "SKF CARB toroidal bearing C 4130 V shares the 150×250×100 mm envelope but catalogue C/C0 differ (1220/1860 kN vs 1054/1530 kN); it floats axially and cannot locate the shaft — pair, never swap one-for-one." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24130-CCK30-W33", "SKF 24130 CCK30/W33", "24130 K" ], "locale_variants": {} }, { "sku": "24032-CCK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24032 CCK30/W33", "series": "24000-series", "type": "spherical_roller", "d_mm": 160, "D_mm": 240, "B_mm": 80, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 783, "static_load_kN": 1200, "fatigue_load_limit_kN": 114, "max_rpm": 2400, "reference_speed_rpm": 1700, "limiting_speed_rpm": 2400, "weight_g": 15000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "In SKF catalogue PUB BU/P1 17000, 24032-cck30-w33 denotes the tapered-bore version (K30 suffix, taper 1:30) of the 24000-series spherical roller bearing: dimensioned 160×240×80 mm, it seats on an adapter or withdrawal sleeve rather than directly on a machined journal. Reading the designation: the leading 2 marks a spherical roller bearing, the 40 is the ISO 15 dimension series (dimension series 40 (compact OD, maximum width)), and the last two digits encode the 160 mm bore; the 240 mm OD and 80 mm width follow the ISO 15 general plan. Reading the suffix on 24032-cck30-w33, the K30 (or EK/CCK30) element changes only the bore — 1:30 taper for sleeve mounting — while the rest of the suffix chain (CC cages with W33 groove) keeps the same internal design, cage and W33 relubrication features as the cylindrical-bore 24032-cc-w33. The 114 kN Pu figure feeds the adjusted-life equation at contaminated or partial-film conditions, and the 1.53 C0/C balance shows this execution is tuned to heavy radial-plus-axial duty with misalignment tolerance. At 160 mm bore, dismount after service is by KM locknut reversal or a hydraulic nut on larger sizes; oil-injection grooves on the bigger sleeves let pressurised oil float the 24032-cck30-w33 off the taper without scoring either surface.", "applications": [ "steel-plant continuous-caster segments", "large induced-draft fan rotors", "stepped shafts fitted with withdrawal sleeves against a fixed shoulder", "fan and pulley shafts that need periodic bearing removal in the field" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "inner-ring circumferential cracking after over-drive on the tapered seat removes too much radial clearance and the bearing runs preloaded", "roller-end scoring from starved lubricant at start-up before the grease channel purges", "smearing on the roller-raceway contact during skid starts below the minimum load" ], "pitfalls": [ "At 160 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24000-series series at 160 mm bore (240×80 mm) packs maximum roller length into the smallest OD envelope — very high C0 for its size but the lowest speed ceiling; never swap it for a wider-OD 231 bearing without re-checking the housing bore and the speed margin.", "The adapter sleeve is selected by actual shaft diameter, not by the 160 mm nominal bearing bore: H-sleeve part numbers span a small diameter range, so two different shaft diameters can use the same 24032-cck30-w33 with different sleeves.", "A loose sleeve after the first weeks of service usually means inadequate initial drive-up; re-checking clearance without dismounting is possible through the 80 mm-wide roller rows with feeler gauges — do not simply tighten the KM nut until vibration stops.", "The 24032-cck30-w33 shares its ISO 15 envelope across brands, but internal geometry differs — SKF load ratings in this row are 783/1200 kN; another maker's same-size bearing may rate higher or lower, so do not interchange on envelope alone.", "The 783/1200 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24032 CCK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24032-cck30-w33?", "a": "The SKF 24032 CCK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 160 mm nominal bore, 240 mm outer diameter and 80 mm width (6.299 × 9.449 × 3.15 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 783 kN, C0 1200 kN, Pu 114 kN, reference speed 1,700 r/min, limiting speed 2,400 r/min, mass about 15000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24032-cck30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24032-cck30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 160 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24032-cck30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24032-cck30-w33 and 24032-cc-w33?", "a": "They share the ISO 15 envelope and the same 783/1200 kN ratings, but 24032-cck30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24032-cc-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24032", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24032; identical ISO 15 envelope, fits AH24032 withdrawal sleeve on a 150 mm shaft." }, { "equiv_sku": "C4032", "equiv_brand": "SKF", "level": "full", "note": "SKF CARB toroidal bearing C 4032 shares the 160×240×80 mm envelope with ratings within 10 %; it self-aligns but floats axially and cannot locate the shaft — locating/non-locating pair, not a substitute." }, { "equiv_sku": "C4032-K30", "equiv_brand": "SKF", "level": "full", "note": "SKF CARB toroidal bearing C 4032 K30 shares the 160×240×80 mm envelope with ratings within 10 %; it self-aligns but floats axially and cannot locate the shaft — locating/non-locating pair, not a substitute." }, { "equiv_sku": "C4032-2CS5V-GEM9", "equiv_brand": "SKF", "level": "full", "note": "SKF CARB toroidal bearing C 4032-2CS5V/GEM9 shares the 160×240×80 mm envelope with ratings within 10 %; it self-aligns but floats axially and cannot locate the shaft — locating/non-locating pair, not a substitute." }, { "equiv_sku": "C4032-V", "equiv_brand": "SKF", "level": "partial", "note": "SKF CARB toroidal bearing C 4032 V shares the 160×240×80 mm envelope but catalogue C/C0 differ (915/1460 kN vs 783/1200 kN); it floats axially and cannot locate the shaft — pair, never swap one-for-one." }, { "equiv_sku": "C4032-K30V", "equiv_brand": "SKF", "level": "partial", "note": "SKF CARB toroidal bearing C 4032 K30V shares the 160×240×80 mm envelope but catalogue C/C0 differ (915/1460 kN vs 783/1200 kN); it floats axially and cannot locate the shaft — pair, never swap one-for-one." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24032-CCK30-W33", "SKF 24032 CCK30/W33", "24032 K" ], "locale_variants": {} }, { "sku": "24132-CCK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24132 CCK30/W33", "series": "24100-series", "type": "spherical_roller", "d_mm": 160, "D_mm": 270, "B_mm": 109, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 1227, "static_load_kN": 1760, "fatigue_load_limit_kN": 163, "max_rpm": 1900, "reference_speed_rpm": 1300, "limiting_speed_rpm": 1900, "weight_g": 28500, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "24132-cck30-w33 is the 1:30 tapered-bore execution of the 24100-series spherical roller bearing: the same two barrel-roller rows on a sphered outer raceway as 24132-cc-w33, but the inner-ring bore tapers 1 mm per 30 mm for adapter- or withdrawal-sleeve mounting, as listed by SKF in SKF catalogue PUB BU/P1 17000. Numbering ties the bearing to its envelope: 24132-cck30-w33 means spherical-roller type, dimension series 41, 160 mm bore — which is why the 270×109 mm outline swaps dimensionally with other ISO 15 bearings of the same code. Note that K30 means the 1:30 taper used on dimension series 40/41; the more common K means 1:12. Adapter sleeves (H) and withdrawal sleeves (AH) are ordered separately by shaft diameter, and the KM locknut plus MB lock washer used for drive-up are also separate components. Selection arithmetic: the C0/C ratio is about 1.43 (static 1760 kN against dynamic 1227 kN), typical of a spherical roller sized for heavy combined loads, and the 163 kN fatigue load limit Pu is the equivalent-load floor used in the life calculation. For shafts with a locating shoulder, use an AH withdrawal sleeve instead of an adapter sleeve: the bearing presses against the shoulder and the sleeve is drawn out for dismounting, making the 24132-cck30-w33 removable without an induction heater.", "applications": [ "SAG and ball-mill drive shafts", "large mining crusher main shafts", "stepped shafts fitted with withdrawal sleeves against a fixed shoulder", "fan and pulley shafts that need periodic bearing removal in the field" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "fretting corrosion and sleeve-seat scoring when drive-up is insufficient and the tapered inner ring creeps on the adapter sleeve", "roller-end scoring from starved lubricant at start-up before the grease channel purges", "electrical pitting on VFD-driven shafts without grounding protection" ], "pitfalls": [ "At 160 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24100-series series at 160 mm bore (270×109 mm) is the heaviest medium-OD execution, built for extreme radial and shock loads at low speed; the 1,900 r/min ceiling is part of the design, not an afterthought — check it before using it in a faster drive.", "The adapter sleeve is selected by actual shaft diameter, not by the 160 mm nominal bearing bore: H-sleeve part numbers span a small diameter range, so two different shaft diameters can use the same 24132-cck30-w33 with different sleeves.", "Never apply the drive-up or clearance-reduction figures for this 1:30 tapered 24132-cck30-w33 to a bearing of the other taper (1:12 vs 1:30); the steeper taper moves far less clearance per nut turn and the targets come from different catalogue tables.", "The self-aligning feature is not a license to ignore alignment: beyond ≈ 0.5–2.5° (series-dependent) the edge loading eats the fatigue margin, and seal drag grows as the rings tilt.", "The 1227/1760 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24132 CCK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24132-cck30-w33?", "a": "The SKF 24132 CCK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 160 mm nominal bore, 270 mm outer diameter and 109 mm width (6.299 × 10.63 × 4.291 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 1227 kN, C0 1760 kN, Pu 163 kN, reference speed 1,300 r/min, limiting speed 1,900 r/min, mass about 28500 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24132-cck30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24132-cck30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 160 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24132-cck30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24132-cck30-w33 and 24132-cc-w33?", "a": "They share the ISO 15 envelope and the same 1227/1760 kN ratings, but 24132-cck30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24132-cc-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24132", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24132; identical ISO 15 envelope, fits AH24132 withdrawal sleeve on a 150 mm shaft." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24132-CCK30-W33", "SKF 24132 CCK30/W33", "24132 K" ], "locale_variants": {} }, { "sku": "24034-CCK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24034 CCK30/W33", "series": "24000-series", "type": "spherical_roller", "d_mm": 170, "D_mm": 260, "B_mm": 90, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 963, "static_load_kN": 1460, "fatigue_load_limit_kN": 137, "max_rpm": 2400, "reference_speed_rpm": 1600, "limiting_speed_rpm": 2400, "weight_g": 20000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "For sleeve mounting on a 170 mm shaft, SKF order number SKF 24034 CCK30/W33 is the 1:30 tapered-bore spherical roller bearing in the 24000-series family (dimension series 40 (compact OD, maximum width)); the cylindrical-bore equivalent is a separate order number, 24034-cc-w33. Numbering ties the bearing to its envelope: 24034-cck30-w33 means spherical-roller type, dimension series 40, 170 mm bore — which is why the 260×90 mm outline swaps dimensionally with other ISO 15 bearings of the same code. Sleeve mounting is why the K30 execution exists: a plain h9-tolerance shaft is enough because the adapter sleeve supplies the precision seat, and the bearing is removable without pulling over an interference journal — a separate order number from the cylindrical-bore bearing, never a field conversion. The 45.0 mm radial section height ((260−170)/2) and 20000 g catalogue mass frame a 170 mm bore bearing rated at 963 kN C — roughly 5.66 kN of dynamic capacity per millimetre of bore before application factors. On an H adapter sleeve the 170 mm shaft seat only needs an h9 plain journal; slide the sleeve into the 24034-cck30-w33 inner ring, tighten the KM nut against the MB washer until the catalogue clearance-reduction value is reached, then lock the washer tab.", "applications": [ "wind-turbine main shaft support", "heavy rolling-mill work-roll chocks", "split-housing plummer block arrangements with bearings swapped in situ", "heavy crusher and screen shafts mounted and dismounted with hydraulic nuts" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "sleeve seizure and shaft seat damage from omitting the anti-seize film between withdrawal sleeve and journal before drive-up", "surface distress and smearing when the relubrication interval is exceeded — the W33 groove is only effective if grease actually reaches the roller rows", "false brinelling on standby machines exposed to external vibration" ], "pitfalls": [ "At 170 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24000-series series at 170 mm bore (260×90 mm) packs maximum roller length into the smallest OD envelope — very high C0 for its size but the lowest speed ceiling; never swap it for a wider-OD 231 bearing without re-checking the housing bore and the speed margin.", "The 24034-cck30-w33 and its cylindrical-bore counterpart 24034-cc-w33 share envelope and load ratings (963/1460 kN) but are not interchangeable in a housing already fitted for direct shaft mounting — the sleeve changes the assembly stack-up.", "The adapter sleeve is selected by actual shaft diameter, not by the 170 mm nominal bearing bore: H-sleeve part numbers span a small diameter range, so two different shaft diameters can use the same 24034-cck30-w33 with different sleeves.", "Open spherical roller bearings rely on the housing seals; in screening or crusher duty a failed seal lets grit into the sphered raceway and the 24034-cck30-w33 pits long before its L10 life.", "The 963/1460 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24034 CCK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24034-cck30-w33?", "a": "The SKF 24034 CCK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 170 mm nominal bore, 260 mm outer diameter and 90 mm width (6.693 × 10.236 × 3.543 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 963 kN, C0 1460 kN, Pu 137 kN, reference speed 1,600 r/min, limiting speed 2,400 r/min, mass about 20000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24034-cck30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24034-cck30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 170 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24034-cck30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24034-cck30-w33 and 24034-cc-w33?", "a": "They share the ISO 15 envelope and the same 963/1460 kN ratings, but 24034-cck30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24034-cc-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24034", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24034; identical ISO 15 envelope, fits AH24034 withdrawal sleeve on a 160 mm shaft." }, { "equiv_sku": "C4034-V", "equiv_brand": "SKF", "level": "partial", "note": "SKF CARB toroidal bearing C 4034 V shares the 170×260×90 mm envelope but catalogue C/C0 differ (1140/1860 kN vs 963/1460 kN); it floats axially and cannot locate the shaft — pair, never swap one-for-one." }, { "equiv_sku": "C4034-K30V", "equiv_brand": "SKF", "level": "partial", "note": "SKF CARB toroidal bearing C 4034 K30V shares the 170×260×90 mm envelope but catalogue C/C0 differ (1140/1860 kN vs 963/1460 kN); it floats axially and cannot locate the shaft — pair, never swap one-for-one." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24034-CCK30-W33", "SKF 24034 CCK30/W33", "24034 K" ], "locale_variants": {} }, { "sku": "24134-CCK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24134 CCK30/W33", "series": "24100-series", "type": "spherical_roller", "d_mm": 170, "D_mm": 280, "B_mm": 109, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 1270, "static_load_kN": 1860, "fatigue_load_limit_kN": 170, "max_rpm": 1800, "reference_speed_rpm": 1200, "limiting_speed_rpm": 1800, "weight_g": 30000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "In SKF catalogue PUB BU/P1 17000, 24134-cck30-w33 denotes the tapered-bore version (K30 suffix, taper 1:30) of the 24100-series spherical roller bearing: dimensioned 170×280×109 mm, it seats on an adapter or withdrawal sleeve rather than directly on a machined journal. The code breaks down as type digit 2 (double-row spherical roller), dimension series 41 (dimension series 41 (medium OD, maximum width)), and bore code 34 = 170 mm; dimensions 170×280×109 mm therefore match the ISO 15 envelope. The K30 in the designation marks the 1:30 tapered bore: SKF mounts it on an H-series adapter sleeve (with KM locknut and MB lock washer) on a plain commercial-grade shaft, or on an AH withdrawal sleeve where the bearing must abut a shaft shoulder. Catalogue mass 30000 g for the 170×280×109 mm open execution covers the two pressed-steel cages with a floating guide ring; tapered-bore and sealed variants differ in mass and carry their own order numbers. Mounting on the 1:30 taper is controlled by clearance reduction or measured axial drive-up, never by locknut torque: SKF tables give the target radial-clearance decrease for the 170 mm 24134-cck30-w33, checked with feeler gauges before and after drive-up.", "applications": [ "large dredger and marine winch drums", "steel-plant continuous-caster segments", "split-housing plummer block arrangements with bearings swapped in situ", "heavy crusher and screen shafts mounted and dismounted with hydraulic nuts" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "inner-ring circumferential cracking after over-drive on the tapered seat removes too much radial clearance and the bearing runs preloaded", "surface distress and smearing when the relubrication interval is exceeded — the W33 groove is only effective if grease actually reaches the roller rows", "hard-particle indentation of the raceway in unfiltered oil or contaminated grease systems" ], "pitfalls": [ "At 170 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24100-series series at 170 mm bore (280×109 mm) is the heaviest medium-OD execution, built for extreme radial and shock loads at low speed; the 1,800 r/min ceiling is part of the design, not an afterthought — check it before using it in a faster drive.", "The 24134-cck30-w33 and its cylindrical-bore counterpart 24134-cc-w33 share envelope and load ratings (1270/1860 kN) but are not interchangeable in a housing already fitted for direct shaft mounting — the sleeve changes the assembly stack-up.", "The 24134-cck30-w33 and its cylindrical-bore counterpart 24134-cc-w33 share envelope and load ratings (1270/1860 kN) but are not interchangeable in a housing already fitted for direct shaft mounting — the sleeve changes the assembly stack-up.", "Never use the tapered-bore CCK30/K30 variant's drive-up figures on this cylindrical-bore 24134-cck30-w33; clearance reduction targets differ, and over-driving a cylindrical bore onto an oversized journal cracks the inner ring.", "The 1270/1860 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24134 CCK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24134-cck30-w33?", "a": "The SKF 24134 CCK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 170 mm nominal bore, 280 mm outer diameter and 109 mm width (6.693 × 11.024 × 4.291 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 1270 kN, C0 1860 kN, Pu 170 kN, reference speed 1,200 r/min, limiting speed 1,800 r/min, mass about 30000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24134-cck30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24134-cck30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 170 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24134-cck30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24134-cck30-w33 and 24134-cc-w33?", "a": "They share the ISO 15 envelope and the same 1270/1860 kN ratings, but 24134-cck30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24134-cc-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24134", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24134; identical ISO 15 envelope, fits AH24134 withdrawal sleeve on a 160 mm shaft." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24134-CCK30-W33", "SKF 24134 CCK30/W33", "24134 K" ], "locale_variants": {} }, { "sku": "24036-CCK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24036 CCK30/W33", "series": "24000-series", "type": "spherical_roller", "d_mm": 180, "D_mm": 280, "B_mm": 100, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 1134, "static_load_kN": 1730, "fatigue_load_limit_kN": 156, "max_rpm": 2200, "reference_speed_rpm": 1500, "limiting_speed_rpm": 2200, "weight_g": 25500, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Ordering number SKF 24036 CCK30/W33 in SKF catalogue PUB BU/P1 17000 is a double-row spherical roller bearing with a tapered bore (1:30), intended for an H-series adapter sleeve or AH withdrawal sleeve, with two pressed-steel cages with a floating guide ring and the same 180×280×100 mm ISO 15 outline as its cylindrical-bore counterpart. The code breaks down as type digit 2 (double-row spherical roller), dimension series 40 (dimension series 40 (compact OD, maximum width)), and bore code 36 = 180 mm; dimensions 180×280×100 mm therefore match the ISO 15 envelope. Sleeve mounting is why the K30 execution exists: a plain h9-tolerance shaft is enough because the adapter sleeve supplies the precision seat, and the bearing is removable without pulling over an interference journal — a separate order number from the cylindrical-bore bearing, never a field conversion. At 1,500 r/min reference speed the 50.0 mm-section 24036-cck30-w33 is governed thermally by lubricant flow through the W33 groove and the two-row roller complement; grease or oil selection should be made against that value, with 2,200 r/min as the mechanical ceiling. Over-driving the 24036-cck30-w33 up its sleeve pinches radial clearance below the residual minimum and can crack the inner ring in service; under-driving leaves the sleeve seat loose, so the ring creeps and frets the sleeve — measure, do not estimate.", "applications": [ "large induced-draft fan rotors", "SAG and ball-mill drive shafts", "long through-shafts in conveyors, where a sleeve seat avoids a precision journal", "stepped shafts fitted with withdrawal sleeves against a fixed shoulder" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "fretting corrosion and sleeve-seat scoring when drive-up is insufficient and the tapered inner ring creeps on the adapter sleeve", "roller-end scoring from starved lubricant at start-up before the grease channel purges", "fretting corrosion on a loose rotating shaft seat or in vibratory stand-still" ], "pitfalls": [ "At 180 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24000-series series at 180 mm bore (280×100 mm) packs maximum roller length into the smallest OD envelope — very high C0 for its size but the lowest speed ceiling; never swap it for a wider-OD 231 bearing without re-checking the housing bore and the speed margin.", "The adapter sleeve is selected by actual shaft diameter, not by the 180 mm nominal bearing bore: H-sleeve part numbers span a small diameter range, so two different shaft diameters can use the same 24036-cck30-w33 with different sleeves.", "Never apply the drive-up or clearance-reduction figures for this 1:30 tapered 24036-cck30-w33 to a bearing of the other taper (1:12 vs 1:30); the steeper taper moves far less clearance per nut turn and the targets come from different catalogue tables.", "Catalogue reference speed and limiting speed are different limits: the 1,500 r/min reference is a thermal criterion under load, while the 2,200 r/min limiting value is the mechanical ceiling — observe both.", "The 1134/1730 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24036 CCK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24036-cck30-w33?", "a": "The SKF 24036 CCK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 180 mm nominal bore, 280 mm outer diameter and 100 mm width (7.087 × 11.024 × 3.937 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 1134 kN, C0 1730 kN, Pu 156 kN, reference speed 1,500 r/min, limiting speed 2,200 r/min, mass about 25500 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24036-cck30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24036-cck30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 180 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24036-cck30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24036-cck30-w33 and 24036-cc-w33?", "a": "They share the ISO 15 envelope and the same 1134/1730 kN ratings, but 24036-cck30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24036-cc-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24036", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24036; identical ISO 15 envelope, fits AH24036 withdrawal sleeve on a 170 mm shaft." }, { "equiv_sku": "C4036-V", "equiv_brand": "SKF", "level": "partial", "note": "SKF CARB toroidal bearing C 4036 V shares the 180×280×100 mm envelope but catalogue C/C0 differ (1320/2120 kN vs 1134/1730 kN); it floats axially and cannot locate the shaft — pair, never swap one-for-one." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24036-CCK30-W33", "SKF 24036 CCK30/W33", "24036 K" ], "locale_variants": {} }, { "sku": "24136-CCK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24136 CCK30/W33", "series": "24100-series", "type": "spherical_roller", "d_mm": 180, "D_mm": 300, "B_mm": 118, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 1449, "static_load_kN": 2160, "fatigue_load_limit_kN": 196, "max_rpm": 1600, "reference_speed_rpm": 1100, "limiting_speed_rpm": 1600, "weight_g": 37000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "SKF lists SKF 24136 CCK30/W33 as the adapter-sleeve execution in the 24100-series range: a 180 mm nominal-bore spherical roller bearing whose 1:30 tapered inner ring is driven up a sleeve, with 300 mm OD and 118 mm width to the ISO 15 envelope. Digit by digit, 24136-cck30-w33 reads as bearing type 2 (spherical roller, two barrel-roller rows), dimension series 41, and bore reference 36 resolving to 180 mm; 300 mm OD and 118 mm width are the matching ISO 15 boundary values. The K30 in the designation marks the 1:30 tapered bore: SKF mounts it on an H-series adapter sleeve (with KM locknut and MB lock washer) on a plain commercial-grade shaft, or on an AH withdrawal sleeve where the bearing must abut a shaft shoulder. Speed planning uses two different ceilings: 1,100 r/min thermal reference and 1,600 r/min mechanical limiting speed. On an H adapter sleeve the 180 mm shaft seat only needs an h9 plain journal; slide the sleeve into the 24136-cck30-w33 inner ring, tighten the KM nut against the MB washer until the catalogue clearance-reduction value is reached, then lock the washer tab.", "applications": [ "large mining crusher main shafts", "wind-turbine main shaft support", "long through-shafts in conveyors, where a sleeve seat avoids a precision journal", "stepped shafts fitted with withdrawal sleeves against a fixed shoulder" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "sleeve seizure and shaft seat damage from omitting the anti-seize film between withdrawal sleeve and journal before drive-up", "roller-end scoring from starved lubricant at start-up before the grease channel purges", "rolling-contact fatigue spalling after the rated L10 life is exceeded" ], "pitfalls": [ "At 180 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24100-series series at 180 mm bore (300×118 mm) is the heaviest medium-OD execution, built for extreme radial and shock loads at low speed; the 1,600 r/min ceiling is part of the design, not an afterthought — check it before using it in a faster drive.", "The adapter sleeve is selected by actual shaft diameter, not by the 180 mm nominal bearing bore: H-sleeve part numbers span a small diameter range, so two different shaft diameters can use the same 24136-cck30-w33 with different sleeves.", "A loose sleeve after the first weeks of service usually means inadequate initial drive-up; re-checking clearance without dismounting is possible through the 118 mm-wide roller rows with feeler gauges — do not simply tighten the KM nut until vibration stops.", "The 37000 g mass and 118 mm width mean abutment faces must be square to the axis within the bearing's own P0 tolerance; a tilted spacer tilts the outer ring and concentrates load on one roller row of 24136-cck30-w33.", "The 1449/2160 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24136 CCK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24136-cck30-w33?", "a": "The SKF 24136 CCK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 180 mm nominal bore, 300 mm outer diameter and 118 mm width (7.087 × 11.811 × 4.646 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 1449 kN, C0 2160 kN, Pu 196 kN, reference speed 1,100 r/min, limiting speed 1,600 r/min, mass about 37000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24136-cck30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24136-cck30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 180 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24136-cck30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24136-cck30-w33 and 24136-cc-w33?", "a": "They share the ISO 15 envelope and the same 1449/2160 kN ratings, but 24136-cck30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24136-cc-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24136", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24136; identical ISO 15 envelope, fits AH24136 withdrawal sleeve on a 170 mm shaft." }, { "equiv_sku": "C4136-V", "equiv_brand": "SKF", "level": "partial", "note": "SKF CARB toroidal bearing C 4136 V shares the 180×300×118 mm envelope but catalogue C/C0 differ (1760/2700 kN vs 1449/2160 kN); it floats axially and cannot locate the shaft — pair, never swap one-for-one." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24136-CCK30-W33", "SKF 24136 CCK30/W33", "24136 K" ], "locale_variants": {} }, { "sku": "24038-CCK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24038 CCK30/W33", "series": "24000-series", "type": "spherical_roller", "d_mm": 190, "D_mm": 290, "B_mm": 100, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 1164, "static_load_kN": 1800, "fatigue_load_limit_kN": 163, "max_rpm": 2000, "reference_speed_rpm": 1400, "limiting_speed_rpm": 2000, "weight_g": 27500, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The SKF 24038 CCK30/W33 is a 190×290×100 mm spherical roller bearing with a 1:30 tapered bore — SKF catalogue execution for sleeve mounting on a 190 mm plain shaft, retaining the double-row self-aligning barrel-roller design. Digit by digit, 24038-cck30-w33 reads as bearing type 2 (spherical roller, two barrel-roller rows), dimension series 40, and bore reference 38 resolving to 190 mm; 290 mm OD and 100 mm width are the matching ISO 15 boundary values. Note that K30 means the 1:30 taper used on dimension series 40/41; the more common K means 1:12. Adapter sleeves (H) and withdrawal sleeves (AH) are ordered separately by shaft diameter, and the KM locknut plus MB lock washer used for drive-up are also separate components. With C 1164 kN and C0 1800 kN, the 24038-cck30-w33 load check covers radial plus moderate axial in either direction — but below the minimum load the rollers skid, so verify P ≥ 0.01·C0 at the lightest operating point. Because driving up the 1:30 taper consumes radial clearance, K30 executions are commonly ordered with C3 initial clearance so the residual running clearance after mounting matches the cylindrical-bore 24038-cc-w33 on an interference seat.", "applications": [ "heavy rolling-mill work-roll chocks", "large dredger and marine winch drums", "shafting produced to commercial tolerances, where the adapter sleeve supplies the precision seat", "split-housing plummer block arrangements with bearings swapped in situ" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "inner-ring circumferential cracking after over-drive on the tapered seat removes too much radial clearance and the bearing runs preloaded", "surface distress and smearing when the relubrication interval is exceeded — the W33 groove is only effective if grease actually reaches the roller rows", "electrical pitting on VFD-driven shafts without grounding protection" ], "pitfalls": [ "At 190 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24000-series series at 190 mm bore (290×100 mm) packs maximum roller length into the smallest OD envelope — very high C0 for its size but the lowest speed ceiling; never swap it for a wider-OD 231 bearing without re-checking the housing bore and the speed margin.", "The 24038-cck30-w33 and its cylindrical-bore counterpart 24038-cc-w33 share envelope and load ratings (1164/1800 kN) but are not interchangeable in a housing already fitted for direct shaft mounting — the sleeve changes the assembly stack-up.", "The 24038-cck30-w33 and its cylindrical-bore counterpart 24038-cc-w33 share envelope and load ratings (1164/1800 kN) but are not interchangeable in a housing already fitted for direct shaft mounting — the sleeve changes the assembly stack-up.", "The self-aligning feature is not a license to ignore alignment: beyond ≈ 0.5–2.5° (series-dependent) the edge loading eats the fatigue margin, and seal drag grows as the rings tilt.", "The 1164/1800 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24038 CCK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24038-cck30-w33?", "a": "The SKF 24038 CCK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 190 mm nominal bore, 290 mm outer diameter and 100 mm width (7.48 × 11.417 × 3.937 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 1164 kN, C0 1800 kN, Pu 163 kN, reference speed 1,400 r/min, limiting speed 2,000 r/min, mass about 27500 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24038-cck30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24038-cck30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 190 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24038-cck30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24038-cck30-w33 and 24038-cc-w33?", "a": "They share the ISO 15 envelope and the same 1164/1800 kN ratings, but 24038-cck30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24038-cc-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24038", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24038; identical ISO 15 envelope, fits AH24038 withdrawal sleeve on a 180 mm shaft." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24038-CCK30-W33", "SKF 24038 CCK30/W33", "24038 K" ], "locale_variants": {} }, { "sku": "24138-CCK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24138 CCK30/W33", "series": "24100-series", "type": "spherical_roller", "d_mm": 190, "D_mm": 320, "B_mm": 128, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 1652, "static_load_kN": 2500, "fatigue_load_limit_kN": 212, "max_rpm": 1500, "reference_speed_rpm": 1100, "limiting_speed_rpm": 1500, "weight_g": 46500, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Ordering number SKF 24138 CCK30/W33 in SKF catalogue PUB BU/P1 17000 is a double-row spherical roller bearing with a tapered bore (1:30), intended for an H-series adapter sleeve or AH withdrawal sleeve, with two pressed-steel cages with a floating guide ring and the same 190×320×128 mm ISO 15 outline as its cylindrical-bore counterpart. On the SKF nameplate, 24138-cck30-w33 follows the ISO 15 convention: 2 for the spherical roller type, 41 for the dimension series 41 (medium OD, maximum width), final digits 38 for the 190 mm bore. Reading the suffix on 24138-cck30-w33, the K30 (or EK/CCK30) element changes only the bore — 1:30 taper for sleeve mounting — while the rest of the suffix chain (CC cages with W33 groove) keeps the same internal design, cage and W33 relubrication features as the cylindrical-bore 24138-cc-w33. The 212 kN Pu figure feeds the adjusted-life equation at contaminated or partial-film conditions, and the 1.51 C0/C balance shows this execution is tuned to heavy radial-plus-axial duty with misalignment tolerance. After drive-up, re-check radial clearance and then swing the outer ring through its self-aligning range: the sphered raceway of the 24138-cck30-w33 must still tilt ≈ 0.5–2.5° freely — a joint that binds after sleeve mounting signals excessive drive-up or a cocked sleeve.", "applications": [ "steel-plant continuous-caster segments", "large induced-draft fan rotors", "shafting produced to commercial tolerances, where the adapter sleeve supplies the precision seat", "split-housing plummer block arrangements with bearings swapped in situ" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "fretting corrosion and sleeve-seat scoring when drive-up is insufficient and the tapered inner ring creeps on the adapter sleeve", "surface distress and smearing when the relubrication interval is exceeded — the W33 groove is only effective if grease actually reaches the roller rows", "brinelling from static overload or impact during handling and mounting" ], "pitfalls": [ "At 190 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24100-series series at 190 mm bore (320×128 mm) is the heaviest medium-OD execution, built for extreme radial and shock loads at low speed; the 1,500 r/min ceiling is part of the design, not an afterthought — check it before using it in a faster drive.", "The 24138-cck30-w33 and its cylindrical-bore counterpart 24138-cc-w33 share envelope and load ratings (1652/2500 kN) but are not interchangeable in a housing already fitted for direct shaft mounting — the sleeve changes the assembly stack-up.", "The adapter sleeve is selected by actual shaft diameter, not by the 190 mm nominal bearing bore: H-sleeve part numbers span a small diameter range, so two different shaft diameters can use the same 24138-cck30-w33 with different sleeves.", "Shaft and housing fillets must clear the bearing chamfer so the 128 mm-wide rings seat square; use an undercut or withdrawal groove rather than an oversized radius that locks on the ring face.", "The 1652/2500 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24138 CCK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24138-cck30-w33?", "a": "The SKF 24138 CCK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 190 mm nominal bore, 320 mm outer diameter and 128 mm width (7.48 × 12.598 × 5.039 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 1652 kN, C0 2500 kN, Pu 212 kN, reference speed 1,100 r/min, limiting speed 1,500 r/min, mass about 46500 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24138-cck30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24138-cck30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 190 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24138-cck30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24138-cck30-w33 and 24138-cc-w33?", "a": "They share the ISO 15 envelope and the same 1652/2500 kN ratings, but 24138-cck30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24138-cc-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24138", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24138; identical ISO 15 envelope, fits AH24138 withdrawal sleeve on a 180 mm shaft." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24138-CCK30-W33", "SKF 24138 CCK30/W33", "24138 K" ], "locale_variants": {} }, { "sku": "24040-CCK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24040 CCK30/W33", "series": "24000-series", "type": "spherical_roller", "d_mm": 200, "D_mm": 310, "B_mm": 109, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 1353, "static_load_kN": 2120, "fatigue_load_limit_kN": 186, "max_rpm": 1900, "reference_speed_rpm": 1300, "limiting_speed_rpm": 1900, "weight_g": 34500, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The SKF 24040 CCK30/W33 is a 200×310×109 mm spherical roller bearing with a 1:30 tapered bore — SKF catalogue execution for sleeve mounting on a 200 mm plain shaft, retaining the double-row self-aligning barrel-roller design. Numbering ties the bearing to its envelope: 24040-cck30-w33 means spherical-roller type, dimension series 40, 200 mm bore — which is why the 310×109 mm outline swaps dimensionally with other ISO 15 bearings of the same code. The K30 in the designation marks the 1:30 tapered bore: SKF mounts it on an H-series adapter sleeve (with KM locknut and MB lock washer) on a plain commercial-grade shaft, or on an AH withdrawal sleeve where the bearing must abut a shaft shoulder. With C 1353 kN and C0 2120 kN, the 24040-cck30-w33 load check covers radial plus moderate axial in either direction — but below the minimum load the rollers skid, so verify P ≥ 0.01·C0 at the lightest operating point. Over-driving the 24040-cck30-w33 up its sleeve pinches radial clearance below the residual minimum and can crack the inner ring in service; under-driving leaves the sleeve seat loose, so the ring creeps and frets the sleeve — measure, do not estimate.", "applications": [ "heavy rolling-mill work-roll chocks", "large dredger and marine winch drums", "long through-shafts in conveyors, where a sleeve seat avoids a precision journal", "stepped shafts fitted with withdrawal sleeves against a fixed shoulder" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "inner-ring circumferential cracking after over-drive on the tapered seat removes too much radial clearance and the bearing runs preloaded", "roller-end scoring from starved lubricant at start-up before the grease channel purges", "rolling-contact fatigue spalling after the rated L10 life is exceeded" ], "pitfalls": [ "At 200 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24000-series series at 200 mm bore (310×109 mm) packs maximum roller length into the smallest OD envelope — very high C0 for its size but the lowest speed ceiling; never swap it for a wider-OD 231 bearing without re-checking the housing bore and the speed margin.", "A loose sleeve after the first weeks of service usually means inadequate initial drive-up; re-checking clearance without dismounting is possible through the 109 mm-wide roller rows with feeler gauges — do not simply tighten the KM nut until vibration stops.", "Never apply the drive-up or clearance-reduction figures for this 1:30 tapered 24040-cck30-w33 to a bearing of the other taper (1:12 vs 1:30); the steeper taper moves far less clearance per nut turn and the targets come from different catalogue tables.", "Never use the tapered-bore CCK30/K30 variant's drive-up figures on this cylindrical-bore 24040-cck30-w33; clearance reduction targets differ, and over-driving a cylindrical bore onto an oversized journal cracks the inner ring.", "The 1353/2120 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24040 CCK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24040-cck30-w33?", "a": "The SKF 24040 CCK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 200 mm nominal bore, 310 mm outer diameter and 109 mm width (7.874 × 12.205 × 4.291 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 1353 kN, C0 2120 kN, Pu 186 kN, reference speed 1,300 r/min, limiting speed 1,900 r/min, mass about 34500 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24040-cck30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24040-cck30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 200 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24040-cck30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24040-cck30-w33 and 24040-cc-w33?", "a": "They share the ISO 15 envelope and the same 1353/2120 kN ratings, but 24040-cck30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24040-cc-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24040", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24040; identical ISO 15 envelope, fits AH24040 withdrawal sleeve on a 190 mm shaft." }, { "equiv_sku": "C4040-V", "equiv_brand": "SKF", "level": "partial", "note": "SKF CARB toroidal bearing C 4040 V shares the 200×310×109 mm envelope but catalogue C/C0 differ (1630/2650 kN vs 1353/2120 kN); it floats axially and cannot locate the shaft — pair, never swap one-for-one." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24040-CCK30-W33", "SKF 24040 CCK30/W33", "24040 K" ], "locale_variants": {} }, { "sku": "24140-CCK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24140 CCK30/W33", "series": "24100-series", "type": "spherical_roller", "d_mm": 200, "D_mm": 340, "B_mm": 140, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 1865, "static_load_kN": 2800, "fatigue_load_limit_kN": 232, "max_rpm": 1400, "reference_speed_rpm": 1000, "limiting_speed_rpm": 1400, "weight_g": 57500, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "For sleeve mounting on a 200 mm shaft, SKF order number SKF 24140 CCK30/W33 is the 1:30 tapered-bore spherical roller bearing in the 24100-series family (dimension series 41 (medium OD, maximum width)); the cylindrical-bore equivalent is a separate order number, 24140-cc-w33. The code breaks down as type digit 2 (double-row spherical roller), dimension series 41 (dimension series 41 (medium OD, maximum width)), and bore code 40 = 200 mm; dimensions 200×340×140 mm therefore match the ISO 15 envelope. The K30 in the designation marks the 1:30 tapered bore: SKF mounts it on an H-series adapter sleeve (with KM locknut and MB lock washer) on a plain commercial-grade shaft, or on an AH withdrawal sleeve where the bearing must abut a shaft shoulder. Catalogue mass 57500 g for the 200×340×140 mm open execution covers the two pressed-steel cages with a floating guide ring; tapered-bore and sealed variants differ in mass and carry their own order numbers. At 200 mm bore, dismount after service is by KM locknut reversal or a hydraulic nut on larger sizes; oil-injection grooves on the bigger sleeves let pressurised oil float the 24140-cck30-w33 off the taper without scoring either surface.", "applications": [ "large dredger and marine winch drums", "steel-plant continuous-caster segments", "split-housing plummer block arrangements with bearings swapped in situ", "heavy crusher and screen shafts mounted and dismounted with hydraulic nuts" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "fretting corrosion and sleeve-seat scoring when drive-up is insufficient and the tapered inner ring creeps on the adapter sleeve", "surface distress and smearing when the relubrication interval is exceeded — the W33 groove is only effective if grease actually reaches the roller rows", "rolling-contact fatigue spalling after the rated L10 life is exceeded" ], "pitfalls": [ "At 200 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24100-series series at 200 mm bore (340×140 mm) is the heaviest medium-OD execution, built for extreme radial and shock loads at low speed; the 1,400 r/min ceiling is part of the design, not an afterthought — check it before using it in a faster drive.", "A loose sleeve after the first weeks of service usually means inadequate initial drive-up; re-checking clearance without dismounting is possible through the 140 mm-wide roller rows with feeler gauges — do not simply tighten the KM nut until vibration stops.", "The adapter sleeve is selected by actual shaft diameter, not by the 200 mm nominal bearing bore: H-sleeve part numbers span a small diameter range, so two different shaft diameters can use the same 24140-cck30-w33 with different sleeves.", "The 57500 g mass and 140 mm width mean abutment faces must be square to the axis within the bearing's own P0 tolerance; a tilted spacer tilts the outer ring and concentrates load on one roller row of 24140-cck30-w33.", "The 1865/2800 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24140 CCK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24140-cck30-w33?", "a": "The SKF 24140 CCK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 200 mm nominal bore, 340 mm outer diameter and 140 mm width (7.874 × 13.386 × 5.512 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 1865 kN, C0 2800 kN, Pu 232 kN, reference speed 1,000 r/min, limiting speed 1,400 r/min, mass about 57500 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24140-cck30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24140-cck30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 200 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24140-cck30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24140-cck30-w33 and 24140-cc-w33?", "a": "They share the ISO 15 envelope and the same 1865/2800 kN ratings, but 24140-cck30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24140-cc-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24140", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24140; identical ISO 15 envelope, fits AH24140 withdrawal sleeve on a 190 mm shaft." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24140-CCK30-W33", "SKF 24140 CCK30/W33", "24140 K" ], "locale_variants": {} }, { "sku": "24044-CCK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24044 CCK30/W33", "series": "24000-series", "type": "spherical_roller", "d_mm": 220, "D_mm": 340, "B_mm": 118, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 1628, "static_load_kN": 2600, "fatigue_load_limit_kN": 212, "max_rpm": 1700, "reference_speed_rpm": 1200, "limiting_speed_rpm": 1700, "weight_g": 47500, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "For sleeve mounting on a 220 mm shaft, SKF order number SKF 24044 CCK30/W33 is the 1:30 tapered-bore spherical roller bearing in the 24000-series family (dimension series 40 (compact OD, maximum width)); the cylindrical-bore equivalent is a separate order number, 24044-cc-w33. The code breaks down as type digit 2 (double-row spherical roller), dimension series 40 (dimension series 40 (compact OD, maximum width)), and bore code 44 = 220 mm; dimensions 220×340×118 mm therefore match the ISO 15 envelope. Reading the suffix on 24044-cck30-w33, the K30 (or EK/CCK30) element changes only the bore — 1:30 taper for sleeve mounting — while the rest of the suffix chain (CC cages with W33 groove) keeps the same internal design, cage and W33 relubrication features as the cylindrical-bore 24044-cc-w33. With C 1628 kN and C0 2600 kN, the 24044-cck30-w33 load check covers radial plus moderate axial in either direction — but below the minimum load the rollers skid, so verify P ≥ 0.01·C0 at the lightest operating point. Mounting on the 1:30 taper is controlled by clearance reduction or measured axial drive-up, never by locknut torque: SKF tables give the target radial-clearance decrease for the 220 mm 24044-cck30-w33, checked with feeler gauges before and after drive-up.", "applications": [ "heavy rolling-mill work-roll chocks", "large dredger and marine winch drums", "heavy crusher and screen shafts mounted and dismounted with hydraulic nuts", "long through-shafts in conveyors, where a sleeve seat avoids a precision journal" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "sleeve seizure and shaft seat damage from omitting the anti-seize film between withdrawal sleeve and journal before drive-up", "roller-end scoring from starved lubricant at start-up before the grease channel purges", "smearing on the roller-raceway contact during skid starts below the minimum load" ], "pitfalls": [ "At 220 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24000-series series at 220 mm bore (340×118 mm) packs maximum roller length into the smallest OD envelope — very high C0 for its size but the lowest speed ceiling; never swap it for a wider-OD 231 bearing without re-checking the housing bore and the speed margin.", "The adapter sleeve is selected by actual shaft diameter, not by the 220 mm nominal bearing bore: H-sleeve part numbers span a small diameter range, so two different shaft diameters can use the same 24044-cck30-w33 with different sleeves.", "A loose sleeve after the first weeks of service usually means inadequate initial drive-up; re-checking clearance without dismounting is possible through the 118 mm-wide roller rows with feeler gauges — do not simply tighten the KM nut until vibration stops.", "Shaft and housing fillets must clear the bearing chamfer so the 118 mm-wide rings seat square; use an undercut or withdrawal groove rather than an oversized radius that locks on the ring face.", "The 1628/2600 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24044 CCK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24044-cck30-w33?", "a": "The SKF 24044 CCK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 220 mm nominal bore, 340 mm outer diameter and 118 mm width (8.661 × 13.386 × 4.646 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 1628 kN, C0 2600 kN, Pu 212 kN, reference speed 1,200 r/min, limiting speed 1,700 r/min, mass about 47500 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24044-cck30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24044-cck30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 220 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24044-cck30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24044-cck30-w33 and 24044-cc-w33?", "a": "They share the ISO 15 envelope and the same 1628/2600 kN ratings, but 24044-cck30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24044-cc-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24044", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24044; identical ISO 15 envelope, fits AOH24044 withdrawal sleeve on a 200 mm shaft." }, { "equiv_sku": "C4044-V", "equiv_brand": "SKF", "level": "partial", "note": "SKF CARB toroidal bearing C 4044 V shares the 220×340×118 mm envelope but catalogue C/C0 differ (1930/3250 kN vs 1628/2600 kN); it floats axially and cannot locate the shaft — pair, never swap one-for-one." }, { "equiv_sku": "C4044-K30V", "equiv_brand": "SKF", "level": "partial", "note": "SKF CARB toroidal bearing C 4044 K30V shares the 220×340×118 mm envelope but catalogue C/C0 differ (1930/3250 kN vs 1628/2600 kN); it floats axially and cannot locate the shaft — pair, never swap one-for-one." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24044-CCK30-W33", "SKF 24044 CCK30/W33", "24044 K" ], "locale_variants": {} }, { "sku": "24144-CCK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24144 CCK30/W33", "series": "24100-series", "type": "spherical_roller", "d_mm": 220, "D_mm": 370, "B_mm": 150, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 2197, "static_load_kN": 3350, "fatigue_load_limit_kN": 285, "max_rpm": 1200, "reference_speed_rpm": 850, "limiting_speed_rpm": 1200, "weight_g": 76000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "In SKF catalogue PUB BU/P1 17000, 24144-cck30-w33 denotes the tapered-bore version (K30 suffix, taper 1:30) of the 24100-series spherical roller bearing: dimensioned 220×370×150 mm, it seats on an adapter or withdrawal sleeve rather than directly on a machined journal. Digit by digit, 24144-cck30-w33 reads as bearing type 2 (spherical roller, two barrel-roller rows), dimension series 41, and bore reference 44 resolving to 220 mm; 370 mm OD and 150 mm width are the matching ISO 15 boundary values. Sleeve mounting is why the K30 execution exists: a plain h9-tolerance shaft is enough because the adapter sleeve supplies the precision seat, and the bearing is removable without pulling over an interference journal — a separate order number from the cylindrical-bore bearing, never a field conversion. Catalogue mass 76000 g for the 220×370×150 mm open execution covers the two pressed-steel cages with a floating guide ring; tapered-bore and sealed variants differ in mass and carry their own order numbers. After drive-up, re-check radial clearance and then swing the outer ring through its self-aligning range: the sphered raceway of the 24144-cck30-w33 must still tilt ≈ 0.5–2.5° freely — a joint that binds after sleeve mounting signals excessive drive-up or a cocked sleeve.", "applications": [ "large dredger and marine winch drums", "steel-plant continuous-caster segments", "split-housing plummer block arrangements with bearings swapped in situ", "heavy crusher and screen shafts mounted and dismounted with hydraulic nuts" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "inner-ring circumferential cracking after over-drive on the tapered seat removes too much radial clearance and the bearing runs preloaded", "surface distress and smearing when the relubrication interval is exceeded — the W33 groove is only effective if grease actually reaches the roller rows", "fretting corrosion on a loose rotating shaft seat or in vibratory stand-still" ], "pitfalls": [ "At 220 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24100-series series at 220 mm bore (370×150 mm) is the heaviest medium-OD execution, built for extreme radial and shock loads at low speed; the 1,200 r/min ceiling is part of the design, not an afterthought — check it before using it in a faster drive.", "The adapter sleeve is selected by actual shaft diameter, not by the 220 mm nominal bearing bore: H-sleeve part numbers span a small diameter range, so two different shaft diameters can use the same 24144-cck30-w33 with different sleeves.", "The 24144-cck30-w33 and its cylindrical-bore counterpart 24144-cc-w33 share envelope and load ratings (2197/3350 kN) but are not interchangeable in a housing already fitted for direct shaft mounting — the sleeve changes the assembly stack-up.", "The 24144-cck30-w33 shares its ISO 15 envelope across brands, but internal geometry differs — SKF load ratings in this row are 2197/3350 kN; another maker's same-size bearing may rate higher or lower, so do not interchange on envelope alone.", "The 2197/3350 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24144 CCK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24144-cck30-w33?", "a": "The SKF 24144 CCK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 220 mm nominal bore, 370 mm outer diameter and 150 mm width (8.661 × 14.567 × 5.906 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 2197 kN, C0 3350 kN, Pu 285 kN, reference speed 850 r/min, limiting speed 1,200 r/min, mass about 76000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24144-cck30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24144-cck30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 220 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24144-cck30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24144-cck30-w33 and 24144-cc-w33?", "a": "They share the ISO 15 envelope and the same 2197/3350 kN ratings, but 24144-cck30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24144-cc-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24144", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24144; identical ISO 15 envelope, fits AOH24144 withdrawal sleeve on a 200 mm shaft." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24144-CCK30-W33", "SKF 24144 CCK30/W33", "24144 K" ], "locale_variants": {} }, { "sku": "24048-CCK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24048 CCK30/W33", "series": "24000-series", "type": "spherical_roller", "d_mm": 240, "D_mm": 360, "B_mm": 118, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 1663, "static_load_kN": 2700, "fatigue_load_limit_kN": 228, "max_rpm": 1600, "reference_speed_rpm": 1100, "limiting_speed_rpm": 1600, "weight_g": 50500, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The SKF 24048 CCK30/W33 is a 240×360×118 mm spherical roller bearing with a 1:30 tapered bore — SKF catalogue execution for sleeve mounting on a 240 mm plain shaft, retaining the double-row self-aligning barrel-roller design. On the SKF nameplate, 24048-cck30-w33 follows the ISO 15 convention: 2 for the spherical roller type, 40 for the dimension series 40 (compact OD, maximum width), final digits 48 for the 240 mm bore. Sleeve mounting is why the K30 execution exists: a plain h9-tolerance shaft is enough because the adapter sleeve supplies the precision seat, and the bearing is removable without pulling over an interference journal — a separate order number from the cylindrical-bore bearing, never a field conversion. Catalogue mass 50500 g for the 240×360×118 mm open execution covers the two pressed-steel cages with a floating guide ring; tapered-bore and sealed variants differ in mass and carry their own order numbers. After drive-up, re-check radial clearance and then swing the outer ring through its self-aligning range: the sphered raceway of the 24048-cck30-w33 must still tilt ≈ 0.5–2.5° freely — a joint that binds after sleeve mounting signals excessive drive-up or a cocked sleeve.", "applications": [ "large dredger and marine winch drums", "steel-plant continuous-caster segments", "split-housing plummer block arrangements with bearings swapped in situ", "heavy crusher and screen shafts mounted and dismounted with hydraulic nuts" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "inner-ring circumferential cracking after over-drive on the tapered seat removes too much radial clearance and the bearing runs preloaded", "roller-end scoring from starved lubricant at start-up before the grease channel purges", "fretting corrosion on a loose rotating shaft seat or in vibratory stand-still" ], "pitfalls": [ "At 240 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24000-series series at 240 mm bore (360×118 mm) packs maximum roller length into the smallest OD envelope — very high C0 for its size but the lowest speed ceiling; never swap it for a wider-OD 231 bearing without re-checking the housing bore and the speed margin.", "The adapter sleeve is selected by actual shaft diameter, not by the 240 mm nominal bearing bore: H-sleeve part numbers span a small diameter range, so two different shaft diameters can use the same 24048-cck30-w33 with different sleeves.", "Never apply the drive-up or clearance-reduction figures for this 1:30 tapered 24048-cck30-w33 to a bearing of the other taper (1:12 vs 1:30); the steeper taper moves far less clearance per nut turn and the targets come from different catalogue tables.", "Open spherical roller bearings rely on the housing seals; in screening or crusher duty a failed seal lets grit into the sphered raceway and the 24048-cck30-w33 pits long before its L10 life.", "The 1663/2700 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24048 CCK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24048-cck30-w33?", "a": "The SKF 24048 CCK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 240 mm nominal bore, 360 mm outer diameter and 118 mm width (9.449 × 14.173 × 4.646 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 1663 kN, C0 2700 kN, Pu 228 kN, reference speed 1,100 r/min, limiting speed 1,600 r/min, mass about 50500 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24048-cck30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24048-cck30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 240 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24048-cck30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24048-cck30-w33 and 24048-cc-w33?", "a": "They share the ISO 15 envelope and the same 1663/2700 kN ratings, but 24048-cck30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24048-cc-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24048", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24048; identical ISO 15 envelope, fits AOH24048 withdrawal sleeve on a 220 mm shaft." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24048-CCK30-W33", "SKF 24048 CCK30/W33", "24048 K" ], "locale_variants": {} }, { "sku": "24148-CCK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24148 CCK30/W33", "series": "24100-series", "type": "spherical_roller", "d_mm": 240, "D_mm": 400, "B_mm": 160, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 2489, "static_load_kN": 3900, "fatigue_load_limit_kN": 320, "max_rpm": 1100, "reference_speed_rpm": 750, "limiting_speed_rpm": 1100, "weight_g": 91500, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Ordering number SKF 24148 CCK30/W33 in SKF catalogue PUB BU/P1 17000 is a double-row spherical roller bearing with a tapered bore (1:30), intended for an H-series adapter sleeve or AH withdrawal sleeve, with two pressed-steel cages with a floating guide ring and the same 240×400×160 mm ISO 15 outline as its cylindrical-bore counterpart. Reading the designation: the leading 2 marks a spherical roller bearing, the 41 is the ISO 15 dimension series (dimension series 41 (medium OD, maximum width)), and the last two digits encode the 240 mm bore; the 400 mm OD and 160 mm width follow the ISO 15 general plan. Note that K30 means the 1:30 taper used on dimension series 40/41; the more common K means 1:12. Adapter sleeves (H) and withdrawal sleeves (AH) are ordered separately by shaft diameter, and the KM locknut plus MB lock washer used for drive-up are also separate components. The 320 kN Pu figure feeds the adjusted-life equation at contaminated or partial-film conditions, and the 1.57 C0/C balance shows this execution is tuned to heavy radial-plus-axial duty with misalignment tolerance. For shafts with a locating shoulder, use an AH withdrawal sleeve instead of an adapter sleeve: the bearing presses against the shoulder and the sleeve is drawn out for dismounting, making the 24148-cck30-w33 removable without an induction heater.", "applications": [ "steel-plant continuous-caster segments", "large induced-draft fan rotors", "shafting produced to commercial tolerances, where the adapter sleeve supplies the precision seat", "split-housing plummer block arrangements with bearings swapped in situ" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "fretting corrosion and sleeve-seat scoring when drive-up is insufficient and the tapered inner ring creeps on the adapter sleeve", "surface distress and smearing when the relubrication interval is exceeded — the W33 groove is only effective if grease actually reaches the roller rows", "seal-lip wear and grease purge loss when an open bearing is run without functioning housing seals" ], "pitfalls": [ "At 240 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24100-series series at 240 mm bore (400×160 mm) is the heaviest medium-OD execution, built for extreme radial and shock loads at low speed; the 1,100 r/min ceiling is part of the design, not an afterthought — check it before using it in a faster drive.", "The adapter sleeve is selected by actual shaft diameter, not by the 240 mm nominal bearing bore: H-sleeve part numbers span a small diameter range, so two different shaft diameters can use the same 24148-cck30-w33 with different sleeves.", "The adapter sleeve is selected by actual shaft diameter, not by the 240 mm nominal bearing bore: H-sleeve part numbers span a small diameter range, so two different shaft diameters can use the same 24148-cck30-w33 with different sleeves.", "Catalogue reference speed and limiting speed are different limits: the 750 r/min reference is a thermal criterion under load, while the 1,100 r/min limiting value is the mechanical ceiling — observe both.", "The 2489/3900 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24148 CCK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24148-cck30-w33?", "a": "The SKF 24148 CCK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 240 mm nominal bore, 400 mm outer diameter and 160 mm width (9.449 × 15.748 × 6.299 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 2489 kN, C0 3900 kN, Pu 320 kN, reference speed 750 r/min, limiting speed 1,100 r/min, mass about 91500 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24148-cck30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24148-cck30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 240 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24148-cck30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24148-cck30-w33 and 24148-cc-w33?", "a": "They share the ISO 15 envelope and the same 2489/3900 kN ratings, but 24148-cck30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24148-cc-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24148", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24148; identical ISO 15 envelope, fits AOH24148 withdrawal sleeve on a 220 mm shaft." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24148-CCK30-W33", "SKF 24148 CCK30/W33", "24148 K" ], "locale_variants": {} }, { "sku": "24052-CCK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24052 CCK30/W33", "series": "24000-series", "type": "spherical_roller", "d_mm": 260, "D_mm": 400, "B_mm": 140, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 2135, "static_load_kN": 3450, "fatigue_load_limit_kN": 285, "max_rpm": 1400, "reference_speed_rpm": 1000, "limiting_speed_rpm": 1400, "weight_g": 75000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "In SKF catalogue PUB BU/P1 17000, 24052-cck30-w33 denotes the tapered-bore version (K30 suffix, taper 1:30) of the 24000-series spherical roller bearing: dimensioned 260×400×140 mm, it seats on an adapter or withdrawal sleeve rather than directly on a machined journal. Digit by digit, 24052-cck30-w33 reads as bearing type 2 (spherical roller, two barrel-roller rows), dimension series 40, and bore reference 52 resolving to 260 mm; 400 mm OD and 140 mm width are the matching ISO 15 boundary values. Sleeve mounting is why the K30 execution exists: a plain h9-tolerance shaft is enough because the adapter sleeve supplies the precision seat, and the bearing is removable without pulling over an interference journal — a separate order number from the cylindrical-bore bearing, never a field conversion. Selection arithmetic: the C0/C ratio is about 1.62 (static 3450 kN against dynamic 2135 kN), typical of a spherical roller sized for heavy combined loads, and the 285 kN fatigue load limit Pu is the equivalent-load floor used in the life calculation. On an H adapter sleeve the 260 mm shaft seat only needs an h9 plain journal; slide the sleeve into the 24052-cck30-w33 inner ring, tighten the KM nut against the MB washer until the catalogue clearance-reduction value is reached, then lock the washer tab.", "applications": [ "SAG and ball-mill drive shafts", "large mining crusher main shafts", "fan and pulley shafts that need periodic bearing removal in the field", "shafting produced to commercial tolerances, where the adapter sleeve supplies the precision seat" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "sleeve seizure and shaft seat damage from omitting the anti-seize film between withdrawal sleeve and journal before drive-up", "surface distress and smearing when the relubrication interval is exceeded — the W33 groove is only effective if grease actually reaches the roller rows", "fretting corrosion on a loose rotating shaft seat or in vibratory stand-still" ], "pitfalls": [ "At 260 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24000-series series at 260 mm bore (400×140 mm) packs maximum roller length into the smallest OD envelope — very high C0 for its size but the lowest speed ceiling; never swap it for a wider-OD 231 bearing without re-checking the housing bore and the speed margin.", "A loose sleeve after the first weeks of service usually means inadequate initial drive-up; re-checking clearance without dismounting is possible through the 140 mm-wide roller rows with feeler gauges — do not simply tighten the KM nut until vibration stops.", "The 24052-cck30-w33 and its cylindrical-bore counterpart 24052-cc-w33 share envelope and load ratings (2135/3450 kN) but are not interchangeable in a housing already fitted for direct shaft mounting — the sleeve changes the assembly stack-up.", "Open spherical roller bearings rely on the housing seals; in screening or crusher duty a failed seal lets grit into the sphered raceway and the 24052-cck30-w33 pits long before its L10 life.", "The 2135/3450 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24052 CCK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24052-cck30-w33?", "a": "The SKF 24052 CCK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 260 mm nominal bore, 400 mm outer diameter and 140 mm width (10.236 × 15.748 × 5.512 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 2135 kN, C0 3450 kN, Pu 285 kN, reference speed 1,000 r/min, limiting speed 1,400 r/min, mass about 75000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24052-cck30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24052-cck30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 260 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24052-cck30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24052-cck30-w33 and 24052-cc-w33?", "a": "They share the ISO 15 envelope and the same 2135/3450 kN ratings, but 24052-cck30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24052-cc-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24052", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24052; identical ISO 15 envelope, fits AOH24052 withdrawal sleeve on a 240 mm shaft." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24052-CCK30-W33", "SKF 24052 CCK30/W33", "24052 K" ], "locale_variants": {} }, { "sku": "24152-CCK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24152 CCK30/W33", "series": "24100-series", "type": "spherical_roller", "d_mm": 260, "D_mm": 440, "B_mm": 180, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 3086, "static_load_kN": 4800, "fatigue_load_limit_kN": 380, "max_rpm": 950, "reference_speed_rpm": 670, "limiting_speed_rpm": 950, "weight_g": 120000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "24152-cck30-w33 is the 1:30 tapered-bore execution of the 24100-series spherical roller bearing: the same two barrel-roller rows on a sphered outer raceway as 24152-cc-w33, but the inner-ring bore tapers 1 mm per 30 mm for adapter- or withdrawal-sleeve mounting, as listed by SKF in SKF catalogue PUB BU/P1 17000. On the SKF nameplate, 24152-cck30-w33 follows the ISO 15 convention: 2 for the spherical roller type, 41 for the dimension series 41 (medium OD, maximum width), final digits 52 for the 260 mm bore. Note that K30 means the 1:30 taper used on dimension series 40/41; the more common K means 1:12. Adapter sleeves (H) and withdrawal sleeves (AH) are ordered separately by shaft diameter, and the KM locknut plus MB lock washer used for drive-up are also separate components. Speed planning uses two different ceilings: 670 r/min thermal reference and 950 r/min mechanical limiting speed. Because driving up the 1:30 taper consumes radial clearance, K30 executions are commonly ordered with C3 initial clearance so the residual running clearance after mounting matches the cylindrical-bore 24152-cc-w33 on an interference seat.", "applications": [ "large mining crusher main shafts", "wind-turbine main shaft support", "stepped shafts fitted with withdrawal sleeves against a fixed shoulder", "fan and pulley shafts that need periodic bearing removal in the field" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "inner-ring circumferential cracking after over-drive on the tapered seat removes too much radial clearance and the bearing runs preloaded", "roller-end scoring from starved lubricant at start-up before the grease channel purges", "seal-lip wear and grease purge loss when an open bearing is run without functioning housing seals" ], "pitfalls": [ "At 260 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24100-series series at 260 mm bore (440×180 mm) is the heaviest medium-OD execution, built for extreme radial and shock loads at low speed; the 950 r/min ceiling is part of the design, not an afterthought — check it before using it in a faster drive.", "A loose sleeve after the first weeks of service usually means inadequate initial drive-up; re-checking clearance without dismounting is possible through the 180 mm-wide roller rows with feeler gauges — do not simply tighten the KM nut until vibration stops.", "Never apply the drive-up or clearance-reduction figures for this 1:30 tapered 24152-cck30-w33 to a bearing of the other taper (1:12 vs 1:30); the steeper taper moves far less clearance per nut turn and the targets come from different catalogue tables.", "Catalogue reference speed and limiting speed are different limits: the 670 r/min reference is a thermal criterion under load, while the 950 r/min limiting value is the mechanical ceiling — observe both.", "The 3086/4800 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24152 CCK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24152-cck30-w33?", "a": "The SKF 24152 CCK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 260 mm nominal bore, 440 mm outer diameter and 180 mm width (10.236 × 17.323 × 7.087 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 3086 kN, C0 4800 kN, Pu 380 kN, reference speed 670 r/min, limiting speed 950 r/min, mass about 120000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24152-cck30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24152-cck30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 260 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24152-cck30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24152-cck30-w33 and 24152-cc-w33?", "a": "They share the ISO 15 envelope and the same 3086/4800 kN ratings, but 24152-cck30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24152-cc-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24152", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24152; identical ISO 15 envelope, fits AOH24152 withdrawal sleeve on a 240 mm shaft." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24152-CCK30-W33", "SKF 24152 CCK30/W33", "24152 K" ], "locale_variants": {} }, { "sku": "24056-CCK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24056 CCK30/W33", "series": "24000-series", "type": "spherical_roller", "d_mm": 280, "D_mm": 420, "B_mm": 140, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 2248, "static_load_kN": 3800, "fatigue_load_limit_kN": 285, "max_rpm": 1400, "reference_speed_rpm": 950, "limiting_speed_rpm": 1400, "weight_g": 79000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Ordering number SKF 24056 CCK30/W33 in SKF catalogue PUB BU/P1 17000 is a double-row spherical roller bearing with a tapered bore (1:30), intended for an H-series adapter sleeve or AH withdrawal sleeve, with two pressed-steel cages with a floating guide ring and the same 280×420×140 mm ISO 15 outline as its cylindrical-bore counterpart. Reading the designation: the leading 2 marks a spherical roller bearing, the 40 is the ISO 15 dimension series (dimension series 40 (compact OD, maximum width)), and the last two digits encode the 280 mm bore; the 420 mm OD and 140 mm width follow the ISO 15 general plan. Note that K30 means the 1:30 taper used on dimension series 40/41; the more common K means 1:12. Adapter sleeves (H) and withdrawal sleeves (AH) are ordered separately by shaft diameter, and the KM locknut plus MB lock washer used for drive-up are also separate components. Speed planning uses two different ceilings: 950 r/min thermal reference and 1,400 r/min mechanical limiting speed. Because driving up the 1:30 taper consumes radial clearance, K30 executions are commonly ordered with C3 initial clearance so the residual running clearance after mounting matches the cylindrical-bore 24056-cc-w33 on an interference seat.", "applications": [ "large mining crusher main shafts", "wind-turbine main shaft support", "stepped shafts fitted with withdrawal sleeves against a fixed shoulder", "fan and pulley shafts that need periodic bearing removal in the field" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "inner-ring circumferential cracking after over-drive on the tapered seat removes too much radial clearance and the bearing runs preloaded", "surface distress and smearing when the relubrication interval is exceeded — the W33 groove is only effective if grease actually reaches the roller rows", "seal-lip wear and grease purge loss when an open bearing is run without functioning housing seals" ], "pitfalls": [ "At 280 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24000-series series at 280 mm bore (420×140 mm) packs maximum roller length into the smallest OD envelope — very high C0 for its size but the lowest speed ceiling; never swap it for a wider-OD 231 bearing without re-checking the housing bore and the speed margin.", "A loose sleeve after the first weeks of service usually means inadequate initial drive-up; re-checking clearance without dismounting is possible through the 140 mm-wide roller rows with feeler gauges — do not simply tighten the KM nut until vibration stops.", "The adapter sleeve is selected by actual shaft diameter, not by the 280 mm nominal bearing bore: H-sleeve part numbers span a small diameter range, so two different shaft diameters can use the same 24056-cck30-w33 with different sleeves.", "The self-aligning feature is not a license to ignore alignment: beyond ≈ 0.5–2.5° (series-dependent) the edge loading eats the fatigue margin, and seal drag grows as the rings tilt.", "The 2248/3800 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24056 CCK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24056-cck30-w33?", "a": "The SKF 24056 CCK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 280 mm nominal bore, 420 mm outer diameter and 140 mm width (11.024 × 16.535 × 5.512 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 2248 kN, C0 3800 kN, Pu 285 kN, reference speed 950 r/min, limiting speed 1,400 r/min, mass about 79000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24056-cck30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24056-cck30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 280 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24056-cck30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24056-cck30-w33 and 24056-cc-w33?", "a": "They share the ISO 15 envelope and the same 2248/3800 kN ratings, but 24056-cck30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24056-cc-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24056", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24056; identical ISO 15 envelope, fits AOH24056 withdrawal sleeve on a 260 mm shaft." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24056-CCK30-W33", "SKF 24056 CCK30/W33", "24056 K" ], "locale_variants": {} }, { "sku": "24156-CCK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24156 CCK30/W33", "series": "24100-series", "type": "spherical_roller", "d_mm": 280, "D_mm": 460, "B_mm": 180, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 3183, "static_load_kN": 5100, "fatigue_load_limit_kN": 415, "max_rpm": 900, "reference_speed_rpm": 630, "limiting_speed_rpm": 900, "weight_g": 130000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "SKF lists SKF 24156 CCK30/W33 as the adapter-sleeve execution in the 24100-series range: a 280 mm nominal-bore spherical roller bearing whose 1:30 tapered inner ring is driven up a sleeve, with 460 mm OD and 180 mm width to the ISO 15 envelope. Numbering ties the bearing to its envelope: 24156-cck30-w33 means spherical-roller type, dimension series 41, 280 mm bore — which is why the 460×180 mm outline swaps dimensionally with other ISO 15 bearings of the same code. The K30 in the designation marks the 1:30 tapered bore: SKF mounts it on an H-series adapter sleeve (with KM locknut and MB lock washer) on a plain commercial-grade shaft, or on an AH withdrawal sleeve where the bearing must abut a shaft shoulder. The 90.0 mm radial section height ((460−280)/2) and 130000 g catalogue mass frame a 280 mm bore bearing rated at 3183 kN C — roughly 11.37 kN of dynamic capacity per millimetre of bore before application factors. At 280 mm bore, dismount after service is by KM locknut reversal or a hydraulic nut on larger sizes; oil-injection grooves on the bigger sleeves let pressurised oil float the 24156-cck30-w33 off the taper without scoring either surface.", "applications": [ "wind-turbine main shaft support", "heavy rolling-mill work-roll chocks", "long through-shafts in conveyors, where a sleeve seat avoids a precision journal", "stepped shafts fitted with withdrawal sleeves against a fixed shoulder" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "fretting corrosion and sleeve-seat scoring when drive-up is insufficient and the tapered inner ring creeps on the adapter sleeve", "roller-end scoring from starved lubricant at start-up before the grease channel purges", "hard-particle indentation of the raceway in unfiltered oil or contaminated grease systems" ], "pitfalls": [ "At 280 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24100-series series at 280 mm bore (460×180 mm) is the heaviest medium-OD execution, built for extreme radial and shock loads at low speed; the 900 r/min ceiling is part of the design, not an afterthought — check it before using it in a faster drive.", "A loose sleeve after the first weeks of service usually means inadequate initial drive-up; re-checking clearance without dismounting is possible through the 180 mm-wide roller rows with feeler gauges — do not simply tighten the KM nut until vibration stops.", "A loose sleeve after the first weeks of service usually means inadequate initial drive-up; re-checking clearance without dismounting is possible through the 180 mm-wide roller rows with feeler gauges — do not simply tighten the KM nut until vibration stops.", "Never use the tapered-bore CCK30/K30 variant's drive-up figures on this cylindrical-bore 24156-cck30-w33; clearance reduction targets differ, and over-driving a cylindrical bore onto an oversized journal cracks the inner ring.", "The 3183/5100 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24156 CCK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24156-cck30-w33?", "a": "The SKF 24156 CCK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 280 mm nominal bore, 460 mm outer diameter and 180 mm width (11.024 × 18.11 × 7.087 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 3183 kN, C0 5100 kN, Pu 415 kN, reference speed 630 r/min, limiting speed 900 r/min, mass about 130000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24156-cck30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24156-cck30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 280 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24156-cck30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24156-cck30-w33 and 24156-cc-w33?", "a": "They share the ISO 15 envelope and the same 3183/5100 kN ratings, but 24156-cck30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24156-cc-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24156", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24156; identical ISO 15 envelope, fits AOH24156 withdrawal sleeve on a 260 mm shaft." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24156-CCK30-W33", "SKF 24156 CCK30/W33", "24156 K" ], "locale_variants": {} }, { "sku": "24060-CCK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24060 CCK30/W33", "series": "24000-series", "type": "spherical_roller", "d_mm": 300, "D_mm": 460, "B_mm": 160, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 2821, "static_load_kN": 4750, "fatigue_load_limit_kN": 355, "max_rpm": 1200, "reference_speed_rpm": 850, "limiting_speed_rpm": 1200, "weight_g": 110000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The SKF 24060 CCK30/W33 is a 300×460×160 mm spherical roller bearing with a 1:30 tapered bore — SKF catalogue execution for sleeve mounting on a 300 mm plain shaft, retaining the double-row self-aligning barrel-roller design. On the SKF nameplate, 24060-cck30-w33 follows the ISO 15 convention: 2 for the spherical roller type, 40 for the dimension series 40 (compact OD, maximum width), final digits 60 for the 300 mm bore. The K30 in the designation marks the 1:30 tapered bore: SKF mounts it on an H-series adapter sleeve (with KM locknut and MB lock washer) on a plain commercial-grade shaft, or on an AH withdrawal sleeve where the bearing must abut a shaft shoulder. Catalogue mass 110000 g for the 300×460×160 mm open execution covers the two pressed-steel cages with a floating guide ring; tapered-bore and sealed variants differ in mass and carry their own order numbers. After drive-up, re-check radial clearance and then swing the outer ring through its self-aligning range: the sphered raceway of the 24060-cck30-w33 must still tilt ≈ 0.5–2.5° freely — a joint that binds after sleeve mounting signals excessive drive-up or a cocked sleeve.", "applications": [ "large dredger and marine winch drums", "steel-plant continuous-caster segments", "long through-shafts in conveyors, where a sleeve seat avoids a precision journal", "stepped shafts fitted with withdrawal sleeves against a fixed shoulder" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "sleeve seizure and shaft seat damage from omitting the anti-seize film between withdrawal sleeve and journal before drive-up", "roller-end scoring from starved lubricant at start-up before the grease channel purges", "hard-particle indentation of the raceway in unfiltered oil or contaminated grease systems" ], "pitfalls": [ "At 300 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24000-series series at 300 mm bore (460×160 mm) packs maximum roller length into the smallest OD envelope — very high C0 for its size but the lowest speed ceiling; never swap it for a wider-OD 231 bearing without re-checking the housing bore and the speed margin.", "The 24060-cck30-w33 and its cylindrical-bore counterpart 24060-cc-w33 share envelope and load ratings (2821/4750 kN) but are not interchangeable in a housing already fitted for direct shaft mounting — the sleeve changes the assembly stack-up.", "Never apply the drive-up or clearance-reduction figures for this 1:30 tapered 24060-cck30-w33 to a bearing of the other taper (1:12 vs 1:30); the steeper taper moves far less clearance per nut turn and the targets come from different catalogue tables.", "The self-aligning feature is not a license to ignore alignment: beyond ≈ 0.5–2.5° (series-dependent) the edge loading eats the fatigue margin, and seal drag grows as the rings tilt.", "The 2821/4750 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24060 CCK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24060-cck30-w33?", "a": "The SKF 24060 CCK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 300 mm nominal bore, 460 mm outer diameter and 160 mm width (11.811 × 18.11 × 6.299 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 2821 kN, C0 4750 kN, Pu 355 kN, reference speed 850 r/min, limiting speed 1,200 r/min, mass about 110000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24060-cck30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24060-cck30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 300 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24060-cck30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24060-cck30-w33 and 24060-cc-w33?", "a": "They share the ISO 15 envelope and the same 2821/4750 kN ratings, but 24060-cck30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24060-cc-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24060", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24060; identical ISO 15 envelope, fits AOH24060 withdrawal sleeve on a 280 mm shaft." }, { "equiv_sku": "C4060-M", "equiv_brand": "SKF", "level": "full", "note": "SKF CARB toroidal bearing C 4060 M shares the 300×460×160 mm envelope with ratings within 10 %; it self-aligns but floats axially and cannot locate the shaft — locating/non-locating pair, not a substitute." }, { "equiv_sku": "C4060-K30M", "equiv_brand": "SKF", "level": "full", "note": "SKF CARB toroidal bearing C 4060 K30M shares the 300×460×160 mm envelope with ratings within 10 %; it self-aligns but floats axially and cannot locate the shaft — locating/non-locating pair, not a substitute." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24060-CCK30-W33", "SKF 24060 CCK30/W33", "24060 K" ], "locale_variants": {} }, { "sku": "24160-CCK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24160 CCK30/W33", "series": "24100-series", "type": "spherical_roller", "d_mm": 300, "D_mm": 500, "B_mm": 200, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 3876, "static_load_kN": 6300, "fatigue_load_limit_kN": 465, "max_rpm": 800, "reference_speed_rpm": 560, "limiting_speed_rpm": 800, "weight_g": 180000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "For sleeve mounting on a 300 mm shaft, SKF order number SKF 24160 CCK30/W33 is the 1:30 tapered-bore spherical roller bearing in the 24100-series family (dimension series 41 (medium OD, maximum width)); the cylindrical-bore equivalent is a separate order number, 24160-cc-w33. Reading the designation: the leading 2 marks a spherical roller bearing, the 41 is the ISO 15 dimension series (dimension series 41 (medium OD, maximum width)), and the last two digits encode the 300 mm bore; the 500 mm OD and 200 mm width follow the ISO 15 general plan. Reading the suffix on 24160-cck30-w33, the K30 (or EK/CCK30) element changes only the bore — 1:30 taper for sleeve mounting — while the rest of the suffix chain (CC cages with W33 groove) keeps the same internal design, cage and W33 relubrication features as the cylindrical-bore 24160-cc-w33. At 560 r/min reference speed the 100.0 mm-section 24160-cck30-w33 is governed thermally by lubricant flow through the W33 groove and the two-row roller complement; grease or oil selection should be made against that value, with 800 r/min as the mechanical ceiling. On an H adapter sleeve the 300 mm shaft seat only needs an h9 plain journal; slide the sleeve into the 24160-cck30-w33 inner ring, tighten the KM nut against the MB washer until the catalogue clearance-reduction value is reached, then lock the washer tab.", "applications": [ "large induced-draft fan rotors", "SAG and ball-mill drive shafts", "heavy crusher and screen shafts mounted and dismounted with hydraulic nuts", "long through-shafts in conveyors, where a sleeve seat avoids a precision journal" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "inner-ring circumferential cracking after over-drive on the tapered seat removes too much radial clearance and the bearing runs preloaded", "roller-end scoring from starved lubricant at start-up before the grease channel purges", "smearing on the roller-raceway contact during skid starts below the minimum load" ], "pitfalls": [ "At 300 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24100-series series at 300 mm bore (500×200 mm) is the heaviest medium-OD execution, built for extreme radial and shock loads at low speed; the 800 r/min ceiling is part of the design, not an afterthought — check it before using it in a faster drive.", "The 24160-cck30-w33 and its cylindrical-bore counterpart 24160-cc-w33 share envelope and load ratings (3876/6300 kN) but are not interchangeable in a housing already fitted for direct shaft mounting — the sleeve changes the assembly stack-up.", "A loose sleeve after the first weeks of service usually means inadequate initial drive-up; re-checking clearance without dismounting is possible through the 200 mm-wide roller rows with feeler gauges — do not simply tighten the KM nut until vibration stops.", "Shaft and housing fillets must clear the bearing chamfer so the 200 mm-wide rings seat square; use an undercut or withdrawal groove rather than an oversized radius that locks on the ring face.", "The 3876/6300 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24160 CCK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24160-cck30-w33?", "a": "The SKF 24160 CCK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 300 mm nominal bore, 500 mm outer diameter and 200 mm width (11.811 × 19.685 × 7.874 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 3876 kN, C0 6300 kN, Pu 465 kN, reference speed 560 r/min, limiting speed 800 r/min, mass about 180000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24160-cck30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24160-cck30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 300 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24160-cck30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24160-cck30-w33 and 24160-cc-w33?", "a": "They share the ISO 15 envelope and the same 3876/6300 kN ratings, but 24160-cck30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24160-cc-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24160", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24160; identical ISO 15 envelope, fits AOH24160 withdrawal sleeve on a 280 mm shaft." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24160-CCK30-W33", "SKF 24160 CCK30/W33", "24160 K" ], "locale_variants": {} }, { "sku": "24064-CCK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24064 CCK30/W33", "series": "24000-series", "type": "spherical_roller", "d_mm": 320, "D_mm": 480, "B_mm": 160, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 2969, "static_load_kN": 5100, "fatigue_load_limit_kN": 400, "max_rpm": 1200, "reference_speed_rpm": 800, "limiting_speed_rpm": 1200, "weight_g": 115000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "For sleeve mounting on a 320 mm shaft, SKF order number SKF 24064 CCK30/W33 is the 1:30 tapered-bore spherical roller bearing in the 24000-series family (dimension series 40 (compact OD, maximum width)); the cylindrical-bore equivalent is a separate order number, 24064-cc-w33. Reading the designation: the leading 2 marks a spherical roller bearing, the 40 is the ISO 15 dimension series (dimension series 40 (compact OD, maximum width)), and the last two digits encode the 320 mm bore; the 480 mm OD and 160 mm width follow the ISO 15 general plan. Reading the suffix on 24064-cck30-w33, the K30 (or EK/CCK30) element changes only the bore — 1:30 taper for sleeve mounting — while the rest of the suffix chain (CC cages with W33 groove) keeps the same internal design, cage and W33 relubrication features as the cylindrical-bore 24064-cc-w33. Catalogue mass 115000 g for the 320×480×160 mm open execution covers the two pressed-steel cages with a floating guide ring; tapered-bore and sealed variants differ in mass and carry their own order numbers. For shafts with a locating shoulder, use an AH withdrawal sleeve instead of an adapter sleeve: the bearing presses against the shoulder and the sleeve is drawn out for dismounting, making the 24064-cck30-w33 removable without an induction heater.", "applications": [ "large dredger and marine winch drums", "steel-plant continuous-caster segments", "heavy crusher and screen shafts mounted and dismounted with hydraulic nuts", "long through-shafts in conveyors, where a sleeve seat avoids a precision journal" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "fretting corrosion and sleeve-seat scoring when drive-up is insufficient and the tapered inner ring creeps on the adapter sleeve", "roller-end scoring from starved lubricant at start-up before the grease channel purges", "brinelling from static overload or impact during handling and mounting" ], "pitfalls": [ "At 320 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24000-series series at 320 mm bore (480×160 mm) packs maximum roller length into the smallest OD envelope — very high C0 for its size but the lowest speed ceiling; never swap it for a wider-OD 231 bearing without re-checking the housing bore and the speed margin.", "A loose sleeve after the first weeks of service usually means inadequate initial drive-up; re-checking clearance without dismounting is possible through the 160 mm-wide roller rows with feeler gauges — do not simply tighten the KM nut until vibration stops.", "A loose sleeve after the first weeks of service usually means inadequate initial drive-up; re-checking clearance without dismounting is possible through the 160 mm-wide roller rows with feeler gauges — do not simply tighten the KM nut until vibration stops.", "The 115000 g mass and 160 mm width mean abutment faces must be square to the axis within the bearing's own P0 tolerance; a tilted spacer tilts the outer ring and concentrates load on one roller row of 24064-cck30-w33.", "The 2969/5100 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24064 CCK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24064-cck30-w33?", "a": "The SKF 24064 CCK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 320 mm nominal bore, 480 mm outer diameter and 160 mm width (12.598 × 18.898 × 6.299 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 2969 kN, C0 5100 kN, Pu 400 kN, reference speed 800 r/min, limiting speed 1,200 r/min, mass about 115000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24064-cck30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24064-cck30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 320 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24064-cck30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24064-cck30-w33 and 24064-cc-w33?", "a": "They share the ISO 15 envelope and the same 2969/5100 kN ratings, but 24064-cck30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24064-cc-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24064", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24064; identical ISO 15 envelope, fits AOH24064 withdrawal sleeve on a 300 mm shaft." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24064-CCK30-W33", "SKF 24064 CCK30/W33", "24064 K" ], "locale_variants": {} }, { "sku": "24164-CCK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24164 CCK30/W33", "series": "24100-series", "type": "spherical_roller", "d_mm": 320, "D_mm": 540, "B_mm": 218, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 4395, "static_load_kN": 7100, "fatigue_load_limit_kN": 510, "max_rpm": 700, "reference_speed_rpm": 500, "limiting_speed_rpm": 700, "weight_g": 225000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The SKF 24164 CCK30/W33 is a 320×540×218 mm spherical roller bearing with a 1:30 tapered bore — SKF catalogue execution for sleeve mounting on a 320 mm plain shaft, retaining the double-row self-aligning barrel-roller design. Numbering ties the bearing to its envelope: 24164-cck30-w33 means spherical-roller type, dimension series 41, 320 mm bore — which is why the 540×218 mm outline swaps dimensionally with other ISO 15 bearings of the same code. Sleeve mounting is why the K30 execution exists: a plain h9-tolerance shaft is enough because the adapter sleeve supplies the precision seat, and the bearing is removable without pulling over an interference journal — a separate order number from the cylindrical-bore bearing, never a field conversion. At 500 r/min reference speed the 110.0 mm-section 24164-cck30-w33 is governed thermally by lubricant flow through the W33 groove and the two-row roller complement; grease or oil selection should be made against that value, with 700 r/min as the mechanical ceiling. Because driving up the 1:30 taper consumes radial clearance, K30 executions are commonly ordered with C3 initial clearance so the residual running clearance after mounting matches the cylindrical-bore 24164-cc-w33 on an interference seat.", "applications": [ "large induced-draft fan rotors", "SAG and ball-mill drive shafts", "split-housing plummer block arrangements with bearings swapped in situ", "heavy crusher and screen shafts mounted and dismounted with hydraulic nuts" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "sleeve seizure and shaft seat damage from omitting the anti-seize film between withdrawal sleeve and journal before drive-up", "roller-end scoring from starved lubricant at start-up before the grease channel purges", "fretting corrosion on a loose rotating shaft seat or in vibratory stand-still" ], "pitfalls": [ "At 320 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24100-series series at 320 mm bore (540×218 mm) is the heaviest medium-OD execution, built for extreme radial and shock loads at low speed; the 700 r/min ceiling is part of the design, not an afterthought — check it before using it in a faster drive.", "A loose sleeve after the first weeks of service usually means inadequate initial drive-up; re-checking clearance without dismounting is possible through the 218 mm-wide roller rows with feeler gauges — do not simply tighten the KM nut until vibration stops.", "Never apply the drive-up or clearance-reduction figures for this 1:30 tapered 24164-cck30-w33 to a bearing of the other taper (1:12 vs 1:30); the steeper taper moves far less clearance per nut turn and the targets come from different catalogue tables.", "Open spherical roller bearings rely on the housing seals; in screening or crusher duty a failed seal lets grit into the sphered raceway and the 24164-cck30-w33 pits long before its L10 life.", "The 4395/7100 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24164 CCK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24164-cck30-w33?", "a": "The SKF 24164 CCK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 320 mm nominal bore, 540 mm outer diameter and 218 mm width (12.598 × 21.26 × 8.583 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 4395 kN, C0 7100 kN, Pu 510 kN, reference speed 500 r/min, limiting speed 700 r/min, mass about 225000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24164-cck30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24164-cck30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 320 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24164-cck30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24164-cck30-w33 and 24164-cc-w33?", "a": "They share the ISO 15 envelope and the same 4395/7100 kN ratings, but 24164-cck30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24164-cc-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24164", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24164; identical ISO 15 envelope, fits AOH24164 withdrawal sleeve on a 300 mm shaft." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24164-CCK30-W33", "SKF 24164 CCK30/W33", "24164 K" ], "locale_variants": {} }, { "sku": "24068-CCK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24068 CCK30/W33", "series": "24000-series", "type": "spherical_roller", "d_mm": 340, "D_mm": 520, "B_mm": 180, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 3621, "static_load_kN": 6200, "fatigue_load_limit_kN": 475, "max_rpm": 1100, "reference_speed_rpm": 750, "limiting_speed_rpm": 1100, "weight_g": 160000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The SKF 24068 CCK30/W33 is a 340×520×180 mm spherical roller bearing with a 1:30 tapered bore — SKF catalogue execution for sleeve mounting on a 340 mm plain shaft, retaining the double-row self-aligning barrel-roller design. The code breaks down as type digit 2 (double-row spherical roller), dimension series 40 (dimension series 40 (compact OD, maximum width)), and bore code 68 = 340 mm; dimensions 340×520×180 mm therefore match the ISO 15 envelope. Sleeve mounting is why the K30 execution exists: a plain h9-tolerance shaft is enough because the adapter sleeve supplies the precision seat, and the bearing is removable without pulling over an interference journal — a separate order number from the cylindrical-bore bearing, never a field conversion. The 475 kN Pu figure feeds the adjusted-life equation at contaminated or partial-film conditions, and the 1.71 C0/C balance shows this execution is tuned to heavy radial-plus-axial duty with misalignment tolerance. On an H adapter sleeve the 340 mm shaft seat only needs an h9 plain journal; slide the sleeve into the 24068-cck30-w33 inner ring, tighten the KM nut against the MB washer until the catalogue clearance-reduction value is reached, then lock the washer tab.", "applications": [ "steel-plant continuous-caster segments", "large induced-draft fan rotors", "split-housing plummer block arrangements with bearings swapped in situ", "heavy crusher and screen shafts mounted and dismounted with hydraulic nuts" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "sleeve seizure and shaft seat damage from omitting the anti-seize film between withdrawal sleeve and journal before drive-up", "roller-end scoring from starved lubricant at start-up before the grease channel purges", "false brinelling on standby machines exposed to external vibration" ], "pitfalls": [ "At 340 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24000-series series at 340 mm bore (520×180 mm) packs maximum roller length into the smallest OD envelope — very high C0 for its size but the lowest speed ceiling; never swap it for a wider-OD 231 bearing without re-checking the housing bore and the speed margin.", "A loose sleeve after the first weeks of service usually means inadequate initial drive-up; re-checking clearance without dismounting is possible through the 180 mm-wide roller rows with feeler gauges — do not simply tighten the KM nut until vibration stops.", "Never apply the drive-up or clearance-reduction figures for this 1:30 tapered 24068-cck30-w33 to a bearing of the other taper (1:12 vs 1:30); the steeper taper moves far less clearance per nut turn and the targets come from different catalogue tables.", "The 24068-cck30-w33 shares its ISO 15 envelope across brands, but internal geometry differs — SKF load ratings in this row are 3621/6200 kN; another maker's same-size bearing may rate higher or lower, so do not interchange on envelope alone.", "The 3621/6200 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24068 CCK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24068-cck30-w33?", "a": "The SKF 24068 CCK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 340 mm nominal bore, 520 mm outer diameter and 180 mm width (13.386 × 20.472 × 7.087 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 3621 kN, C0 6200 kN, Pu 475 kN, reference speed 750 r/min, limiting speed 1,100 r/min, mass about 160000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24068-cck30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24068-cck30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 340 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24068-cck30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24068-cck30-w33 and 24068-cc-w33?", "a": "They share the ISO 15 envelope and the same 3621/6200 kN ratings, but 24068-cck30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24068-cc-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24068", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24068; identical ISO 15 envelope, fits AOH24068 withdrawal sleeve on a 320 mm shaft." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24068-CCK30-W33", "SKF 24068 CCK30/W33", "24068 K" ], "locale_variants": {} }, { "sku": "24168-ECCK30J-W33", "brand": "SKF", "manufacturer_designation": "SKF 24168 ECCK30J/W33", "series": "24100-series", "type": "spherical_roller", "d_mm": 340, "D_mm": 580, "B_mm": 243, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 5487, "static_load_kN": 8650, "fatigue_load_limit_kN": 630, "max_rpm": 630, "reference_speed_rpm": 430, "limiting_speed_rpm": 630, "weight_g": 295000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "SKF lists SKF 24168 ECCK30J/W33 as the adapter-sleeve execution in the 24100-series range: a 340 mm nominal-bore spherical roller bearing whose 1:30 tapered inner ring is driven up a sleeve, with 580 mm OD and 243 mm width to the ISO 15 envelope. On the SKF nameplate, 24168-ecck30j-w33 follows the ISO 15 convention: 2 for the spherical roller type, 41 for the dimension series 41 (medium OD, maximum width), final digits 68 for the 340 mm bore. Sleeve mounting is why the K30 execution exists: a plain h9-tolerance shaft is enough because the adapter sleeve supplies the precision seat, and the bearing is removable without pulling over an interference journal — a separate order number from the cylindrical-bore bearing, never a field conversion. With C 5487 kN and C0 8650 kN, the 24168-ecck30j-w33 load check covers radial plus moderate axial in either direction — but below the minimum load the rollers skid, so verify P ≥ 0.01·C0 at the lightest operating point. Over-driving the 24168-ecck30j-w33 up its sleeve pinches radial clearance below the residual minimum and can crack the inner ring in service; under-driving leaves the sleeve seat loose, so the ring creeps and frets the sleeve — measure, do not estimate.", "applications": [ "heavy rolling-mill work-roll chocks", "large dredger and marine winch drums", "split-housing plummer block arrangements with bearings swapped in situ", "heavy crusher and screen shafts mounted and dismounted with hydraulic nuts" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "inner-ring circumferential cracking after over-drive on the tapered seat removes too much radial clearance and the bearing runs preloaded", "roller-end scoring from starved lubricant at start-up before the grease channel purges", "false brinelling on standby machines exposed to external vibration" ], "pitfalls": [ "At 340 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24100-series series at 340 mm bore (580×243 mm) is the heaviest medium-OD execution, built for extreme radial and shock loads at low speed; the 630 r/min ceiling is part of the design, not an afterthought — check it before using it in a faster drive.", "The 24168-ecck30j-w33 and its cylindrical-bore counterpart 24168-ecck30j-w33 share envelope and load ratings (5487/8650 kN) but are not interchangeable in a housing already fitted for direct shaft mounting — the sleeve changes the assembly stack-up.", "A loose sleeve after the first weeks of service usually means inadequate initial drive-up; re-checking clearance without dismounting is possible through the 243 mm-wide roller rows with feeler gauges — do not simply tighten the KM nut until vibration stops.", "Open spherical roller bearings rely on the housing seals; in screening or crusher duty a failed seal lets grit into the sphered raceway and the 24168-ecck30j-w33 pits long before its L10 life.", "The 5487/8650 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24168 ECCK30J/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24168-ecck30j-w33?", "a": "The SKF 24168 ECCK30J/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 340 mm nominal bore, 580 mm outer diameter and 243 mm width (13.386 × 22.835 × 9.567 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 5487 kN, C0 8650 kN, Pu 630 kN, reference speed 430 r/min, limiting speed 630 r/min, mass about 295000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24168-ecck30j-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24168-ecck30j-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 340 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24168-ecck30j-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24168-ecck30j-w33 and 24168-ecck30j-w33?", "a": "They share the ISO 15 envelope and the same 5487/8650 kN ratings, but 24168-ecck30j-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24168-ecck30j-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24168", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24168; identical ISO 15 envelope, fits AOH24168 withdrawal sleeve on a 320 mm shaft." }, { "equiv_sku": "C4168-K30MB", "equiv_brand": "SKF", "level": "full", "note": "SKF CARB toroidal bearing C 4168 K30MB shares the 340×580×243 mm envelope with ratings within 10 %; it self-aligns but floats axially and cannot locate the shaft — locating/non-locating pair, not a substitute." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24168-ECCK30J-W33", "SKF 24168 ECCK30J/W33", "24168 K" ], "locale_variants": {} }, { "sku": "24072-CCK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24072 CCK30/W33", "series": "24000-series", "type": "spherical_roller", "d_mm": 360, "D_mm": 540, "B_mm": 180, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 3705, "static_load_kN": 6550, "fatigue_load_limit_kN": 490, "max_rpm": 1000, "reference_speed_rpm": 700, "limiting_speed_rpm": 1000, "weight_g": 165000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "In SKF catalogue PUB BU/P1 17000, 24072-cck30-w33 denotes the tapered-bore version (K30 suffix, taper 1:30) of the 24000-series spherical roller bearing: dimensioned 360×540×180 mm, it seats on an adapter or withdrawal sleeve rather than directly on a machined journal. Numbering ties the bearing to its envelope: 24072-cck30-w33 means spherical-roller type, dimension series 40, 360 mm bore — which is why the 540×180 mm outline swaps dimensionally with other ISO 15 bearings of the same code. Note that K30 means the 1:30 taper used on dimension series 40/41; the more common K means 1:12. Adapter sleeves (H) and withdrawal sleeves (AH) are ordered separately by shaft diameter, and the KM locknut plus MB lock washer used for drive-up are also separate components. The 90.0 mm radial section height ((540−360)/2) and 165000 g catalogue mass frame a 360 mm bore bearing rated at 3705 kN C — roughly 10.29 kN of dynamic capacity per millimetre of bore before application factors. After drive-up, re-check radial clearance and then swing the outer ring through its self-aligning range: the sphered raceway of the 24072-cck30-w33 must still tilt ≈ 0.5–2.5° freely — a joint that binds after sleeve mounting signals excessive drive-up or a cocked sleeve.", "applications": [ "wind-turbine main shaft support", "heavy rolling-mill work-roll chocks", "shafting produced to commercial tolerances, where the adapter sleeve supplies the precision seat", "split-housing plummer block arrangements with bearings swapped in situ" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "fretting corrosion and sleeve-seat scoring when drive-up is insufficient and the tapered inner ring creeps on the adapter sleeve", "roller-end scoring from starved lubricant at start-up before the grease channel purges", "seal-lip wear and grease purge loss when an open bearing is run without functioning housing seals" ], "pitfalls": [ "At 360 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24000-series series at 360 mm bore (540×180 mm) packs maximum roller length into the smallest OD envelope — very high C0 for its size but the lowest speed ceiling; never swap it for a wider-OD 231 bearing without re-checking the housing bore and the speed margin.", "The 24072-cck30-w33 and its cylindrical-bore counterpart 24072-cc-w33 share envelope and load ratings (3705/6550 kN) but are not interchangeable in a housing already fitted for direct shaft mounting — the sleeve changes the assembly stack-up.", "Never apply the drive-up or clearance-reduction figures for this 1:30 tapered 24072-cck30-w33 to a bearing of the other taper (1:12 vs 1:30); the steeper taper moves far less clearance per nut turn and the targets come from different catalogue tables.", "Catalogue reference speed and limiting speed are different limits: the 700 r/min reference is a thermal criterion under load, while the 1,000 r/min limiting value is the mechanical ceiling — observe both.", "The 3705/6550 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24072 CCK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24072-cck30-w33?", "a": "The SKF 24072 CCK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 360 mm nominal bore, 540 mm outer diameter and 180 mm width (14.173 × 21.26 × 7.087 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 3705 kN, C0 6550 kN, Pu 490 kN, reference speed 700 r/min, limiting speed 1,000 r/min, mass about 165000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24072-cck30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24072-cck30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 360 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24072-cck30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24072-cck30-w33 and 24072-cc-w33?", "a": "They share the ISO 15 envelope and the same 3705/6550 kN ratings, but 24072-cck30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24072-cc-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24072", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24072; identical ISO 15 envelope, fits AOH24072 withdrawal sleeve on a 340 mm shaft." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24072-CCK30-W33", "SKF 24072 CCK30/W33", "24072 K" ], "locale_variants": {} }, { "sku": "24172-ECCK30J-W33", "brand": "SKF", "manufacturer_designation": "SKF 24172 ECCK30J/W33", "series": "24100-series", "type": "spherical_roller", "d_mm": 360, "D_mm": 600, "B_mm": 243, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 5737, "static_load_kN": 9300, "fatigue_load_limit_kN": 670, "max_rpm": 600, "reference_speed_rpm": 400, "limiting_speed_rpm": 600, "weight_g": 295000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "In SKF catalogue PUB BU/P1 17000, 24172-ecck30j-w33 denotes the tapered-bore version (K30 suffix, taper 1:30) of the 24100-series spherical roller bearing: dimensioned 360×600×243 mm, it seats on an adapter or withdrawal sleeve rather than directly on a machined journal. Numbering ties the bearing to its envelope: 24172-ecck30j-w33 means spherical-roller type, dimension series 41, 360 mm bore — which is why the 600×243 mm outline swaps dimensionally with other ISO 15 bearings of the same code. Sleeve mounting is why the K30 execution exists: a plain h9-tolerance shaft is enough because the adapter sleeve supplies the precision seat, and the bearing is removable without pulling over an interference journal — a separate order number from the cylindrical-bore bearing, never a field conversion. The 670 kN Pu figure feeds the adjusted-life equation at contaminated or partial-film conditions, and the 1.62 C0/C balance shows this execution is tuned to heavy radial-plus-axial duty with misalignment tolerance. On an H adapter sleeve the 360 mm shaft seat only needs an h9 plain journal; slide the sleeve into the 24172-ecck30j-w33 inner ring, tighten the KM nut against the MB washer until the catalogue clearance-reduction value is reached, then lock the washer tab.", "applications": [ "steel-plant continuous-caster segments", "large induced-draft fan rotors", "fan and pulley shafts that need periodic bearing removal in the field", "shafting produced to commercial tolerances, where the adapter sleeve supplies the precision seat" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "inner-ring circumferential cracking after over-drive on the tapered seat removes too much radial clearance and the bearing runs preloaded", "surface distress and smearing when the relubrication interval is exceeded — the W33 groove is only effective if grease actually reaches the roller rows", "false brinelling on standby machines exposed to external vibration" ], "pitfalls": [ "At 360 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24100-series series at 360 mm bore (600×243 mm) is the heaviest medium-OD execution, built for extreme radial and shock loads at low speed; the 600 r/min ceiling is part of the design, not an afterthought — check it before using it in a faster drive.", "Never apply the drive-up or clearance-reduction figures for this 1:30 tapered 24172-ecck30j-w33 to a bearing of the other taper (1:12 vs 1:30); the steeper taper moves far less clearance per nut turn and the targets come from different catalogue tables.", "The 24172-ecck30j-w33 and its cylindrical-bore counterpart 24172-ecck30j-w33 share envelope and load ratings (5737/9300 kN) but are not interchangeable in a housing already fitted for direct shaft mounting — the sleeve changes the assembly stack-up.", "The 24172-ecck30j-w33 shares its ISO 15 envelope across brands, but internal geometry differs — SKF load ratings in this row are 5737/9300 kN; another maker's same-size bearing may rate higher or lower, so do not interchange on envelope alone.", "The 5737/9300 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24172 ECCK30J/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24172-ecck30j-w33?", "a": "The SKF 24172 ECCK30J/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 360 mm nominal bore, 600 mm outer diameter and 243 mm width (14.173 × 23.622 × 9.567 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 5737 kN, C0 9300 kN, Pu 670 kN, reference speed 400 r/min, limiting speed 600 r/min, mass about 295000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24172-ecck30j-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24172-ecck30j-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 360 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24172-ecck30j-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24172-ecck30j-w33 and 24172-ecck30j-w33?", "a": "They share the ISO 15 envelope and the same 5737/9300 kN ratings, but 24172-ecck30j-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24172-ecck30j-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24172", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24172; identical ISO 15 envelope, fits AOH24172 withdrawal sleeve on a 340 mm shaft." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24172-ECCK30J-W33", "SKF 24172 ECCK30J/W33", "24172 K" ], "locale_variants": {} }, { "sku": "24076-CCK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24076 CCK30/W33", "series": "24000-series", "type": "spherical_roller", "d_mm": 380, "D_mm": 560, "B_mm": 180, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 3786, "static_load_kN": 6800, "fatigue_load_limit_kN": 475, "max_rpm": 950, "reference_speed_rpm": 670, "limiting_speed_rpm": 950, "weight_g": 170000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Ordering number SKF 24076 CCK30/W33 in SKF catalogue PUB BU/P1 17000 is a double-row spherical roller bearing with a tapered bore (1:30), intended for an H-series adapter sleeve or AH withdrawal sleeve, with two pressed-steel cages with a floating guide ring and the same 380×560×180 mm ISO 15 outline as its cylindrical-bore counterpart. The code breaks down as type digit 2 (double-row spherical roller), dimension series 40 (dimension series 40 (compact OD, maximum width)), and bore code 76 = 380 mm; dimensions 380×560×180 mm therefore match the ISO 15 envelope. The K30 in the designation marks the 1:30 tapered bore: SKF mounts it on an H-series adapter sleeve (with KM locknut and MB lock washer) on a plain commercial-grade shaft, or on an AH withdrawal sleeve where the bearing must abut a shaft shoulder. The 90.0 mm radial section height ((560−380)/2) and 170000 g catalogue mass frame a 380 mm bore bearing rated at 3786 kN C — roughly 9.96 kN of dynamic capacity per millimetre of bore before application factors. For shafts with a locating shoulder, use an AH withdrawal sleeve instead of an adapter sleeve: the bearing presses against the shoulder and the sleeve is drawn out for dismounting, making the 24076-cck30-w33 removable without an induction heater.", "applications": [ "wind-turbine main shaft support", "heavy rolling-mill work-roll chocks", "fan and pulley shafts that need periodic bearing removal in the field", "shafting produced to commercial tolerances, where the adapter sleeve supplies the precision seat" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "inner-ring circumferential cracking after over-drive on the tapered seat removes too much radial clearance and the bearing runs preloaded", "roller-end scoring from starved lubricant at start-up before the grease channel purges", "hard-particle indentation of the raceway in unfiltered oil or contaminated grease systems" ], "pitfalls": [ "At 380 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24000-series series at 380 mm bore (560×180 mm) packs maximum roller length into the smallest OD envelope — very high C0 for its size but the lowest speed ceiling; never swap it for a wider-OD 231 bearing without re-checking the housing bore and the speed margin.", "A loose sleeve after the first weeks of service usually means inadequate initial drive-up; re-checking clearance without dismounting is possible through the 180 mm-wide roller rows with feeler gauges — do not simply tighten the KM nut until vibration stops.", "A loose sleeve after the first weeks of service usually means inadequate initial drive-up; re-checking clearance without dismounting is possible through the 180 mm-wide roller rows with feeler gauges — do not simply tighten the KM nut until vibration stops.", "Never use the tapered-bore CCK30/K30 variant's drive-up figures on this cylindrical-bore 24076-cck30-w33; clearance reduction targets differ, and over-driving a cylindrical bore onto an oversized journal cracks the inner ring.", "The 3786/6800 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24076 CCK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24076-cck30-w33?", "a": "The SKF 24076 CCK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 380 mm nominal bore, 560 mm outer diameter and 180 mm width (14.961 × 22.047 × 7.087 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 3786 kN, C0 6800 kN, Pu 475 kN, reference speed 670 r/min, limiting speed 950 r/min, mass about 170000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24076-cck30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24076-cck30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 380 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24076-cck30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24076-cck30-w33 and 24076-cc-w33?", "a": "They share the ISO 15 envelope and the same 3786/6800 kN ratings, but 24076-cck30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24076-cc-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24076", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24076; identical ISO 15 envelope, fits AOH24076 withdrawal sleeve on a 360 mm shaft." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24076-CCK30-W33", "SKF 24076 CCK30/W33", "24076 K" ], "locale_variants": {} }, { "sku": "24176-ECAK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24176 ECAK30/W33", "series": "24100-series", "type": "spherical_roller", "d_mm": 380, "D_mm": 620, "B_mm": 243, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "brass_machined_M1", "dynamic_load_kN": 5936, "static_load_kN": 9800, "fatigue_load_limit_kN": 710, "max_rpm": 530, "reference_speed_rpm": 360, "limiting_speed_rpm": 530, "weight_g": 325000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "SKF lists SKF 24176 ECAK30/W33 as the adapter-sleeve execution in the 24100-series range: a 380 mm nominal-bore spherical roller bearing whose 1:30 tapered inner ring is driven up a sleeve, with 620 mm OD and 243 mm width to the ISO 15 envelope. Digit by digit, 24176-ecak30-w33 reads as bearing type 2 (spherical roller, two barrel-roller rows), dimension series 41, and bore reference 76 resolving to 380 mm; 620 mm OD and 243 mm width are the matching ISO 15 boundary values. Note that K30 means the 1:30 taper used on dimension series 40/41; the more common K means 1:12. Adapter sleeves (H) and withdrawal sleeves (AH) are ordered separately by shaft diameter, and the KM locknut plus MB lock washer used for drive-up are also separate components. At 360 r/min reference speed the 120.0 mm-section 24176-ecak30-w33 is governed thermally by lubricant flow through the W33 groove and the two-row roller complement; grease or oil selection should be made against that value, with 530 r/min as the mechanical ceiling. For shafts with a locating shoulder, use an AH withdrawal sleeve instead of an adapter sleeve: the bearing presses against the shoulder and the sleeve is drawn out for dismounting, making the 24176-ecak30-w33 removable without an induction heater.", "applications": [ "large induced-draft fan rotors", "SAG and ball-mill drive shafts", "stepped shafts fitted with withdrawal sleeves against a fixed shoulder", "fan and pulley shafts that need periodic bearing removal in the field" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "sleeve seizure and shaft seat damage from omitting the anti-seize film between withdrawal sleeve and journal before drive-up", "surface distress and smearing when the relubrication interval is exceeded — the W33 groove is only effective if grease actually reaches the roller rows", "electrical pitting on VFD-driven shafts without grounding protection" ], "pitfalls": [ "At 380 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24100-series series at 380 mm bore (620×243 mm) is the heaviest medium-OD execution, built for extreme radial and shock loads at low speed; the 530 r/min ceiling is part of the design, not an afterthought — check it before using it in a faster drive.", "The adapter sleeve is selected by actual shaft diameter, not by the 380 mm nominal bearing bore: H-sleeve part numbers span a small diameter range, so two different shaft diameters can use the same 24176-ecak30-w33 with different sleeves.", "The 24176-ecak30-w33 and its cylindrical-bore counterpart 24176-ecak30-w33 share envelope and load ratings (5936/9800 kN) but are not interchangeable in a housing already fitted for direct shaft mounting — the sleeve changes the assembly stack-up.", "Shaft and housing fillets must clear the bearing chamfer so the 243 mm-wide rings seat square; use an undercut or withdrawal groove rather than an oversized radius that locks on the ring face.", "The 5936/9800 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24176 ECAK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24176-ecak30-w33?", "a": "The SKF 24176 ECAK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 380 mm nominal bore, 620 mm outer diameter and 243 mm width (14.961 × 24.409 × 9.567 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 5936 kN, C0 9800 kN, Pu 710 kN, reference speed 360 r/min, limiting speed 530 r/min, mass about 325000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24176-ecak30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24176-ecak30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 380 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24176-ecak30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24176-ecak30-w33 and 24176-ecak30-w33?", "a": "They share the ISO 15 envelope and the same 5936/9800 kN ratings, but 24176-ecak30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24176-ecak30-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24176", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24176; identical ISO 15 envelope, fits AOH24176 withdrawal sleeve on a 360 mm shaft." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24176-ECAK30-W33", "SKF 24176 ECAK30/W33", "24176 K" ], "locale_variants": {} }, { "sku": "24080-ECCK30J-W33", "brand": "SKF", "manufacturer_designation": "SKF 24080 ECCK30J/W33", "series": "24000-series", "type": "spherical_roller", "d_mm": 400, "D_mm": 600, "B_mm": 200, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel_stamped_J", "dynamic_load_kN": 4507, "static_load_kN": 8000, "fatigue_load_limit_kN": 560, "max_rpm": 900, "reference_speed_rpm": 630, "limiting_speed_rpm": 900, "weight_g": 220000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "24080-ecck30j-w33 is the 1:30 tapered-bore execution of the 24000-series spherical roller bearing: the same two barrel-roller rows on a sphered outer raceway as 24080-ecck30j-w33, but the inner-ring bore tapers 1 mm per 30 mm for adapter- or withdrawal-sleeve mounting, as listed by SKF in SKF catalogue PUB BU/P1 17000. Reading the designation: the leading 2 marks a spherical roller bearing, the 40 is the ISO 15 dimension series (dimension series 40 (compact OD, maximum width)), and the last two digits encode the 400 mm bore; the 600 mm OD and 200 mm width follow the ISO 15 general plan. Reading the suffix on 24080-ecck30j-w33, the K30 (or EK/CCK30) element changes only the bore — 1:30 taper for sleeve mounting — while the rest of the suffix chain (CC cages with W33 groove) keeps the same internal design, cage and W33 relubrication features as the cylindrical-bore 24080-ecck30j-w33. The 100.0 mm radial section height ((600−400)/2) and 220000 g catalogue mass frame a 400 mm bore bearing rated at 4507 kN C — roughly 11.27 kN of dynamic capacity per millimetre of bore before application factors. Because driving up the 1:30 taper consumes radial clearance, K30 executions are commonly ordered with C3 initial clearance so the residual running clearance after mounting matches the cylindrical-bore 24080-ecck30j-w33 on an interference seat.", "applications": [ "wind-turbine main shaft support", "heavy rolling-mill work-roll chocks", "stepped shafts fitted with withdrawal sleeves against a fixed shoulder", "fan and pulley shafts that need periodic bearing removal in the field" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "inner-ring circumferential cracking after over-drive on the tapered seat removes too much radial clearance and the bearing runs preloaded", "roller-end scoring from starved lubricant at start-up before the grease channel purges", "brinelling from static overload or impact during handling and mounting" ], "pitfalls": [ "At 400 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24000-series series at 400 mm bore (600×200 mm) packs maximum roller length into the smallest OD envelope — very high C0 for its size but the lowest speed ceiling; never swap it for a wider-OD 231 bearing without re-checking the housing bore and the speed margin.", "Never apply the drive-up or clearance-reduction figures for this 1:30 tapered 24080-ecck30j-w33 to a bearing of the other taper (1:12 vs 1:30); the steeper taper moves far less clearance per nut turn and the targets come from different catalogue tables.", "A loose sleeve after the first weeks of service usually means inadequate initial drive-up; re-checking clearance without dismounting is possible through the 200 mm-wide roller rows with feeler gauges — do not simply tighten the KM nut until vibration stops.", "Shaft and housing fillets must clear the bearing chamfer so the 200 mm-wide rings seat square; use an undercut or withdrawal groove rather than an oversized radius that locks on the ring face.", "The 4507/8000 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24080 ECCK30J/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24080-ecck30j-w33?", "a": "The SKF 24080 ECCK30J/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 400 mm nominal bore, 600 mm outer diameter and 200 mm width (15.748 × 23.622 × 7.874 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 4507 kN, C0 8000 kN, Pu 560 kN, reference speed 630 r/min, limiting speed 900 r/min, mass about 220000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24080-ecck30j-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24080-ecck30j-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 400 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24080-ecck30j-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24080-ecck30j-w33 and 24080-ecck30j-w33?", "a": "They share the ISO 15 envelope and the same 4507/8000 kN ratings, but 24080-ecck30j-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24080-ecck30j-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24080", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24080; identical ISO 15 envelope, fits AOH24080 withdrawal sleeve on a 380 mm shaft." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24080-ECCK30J-W33", "SKF 24080 ECCK30J/W33", "24080 K" ], "locale_variants": {} }, { "sku": "24180-ECAK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24180 ECAK30/W33", "series": "24100-series", "type": "spherical_roller", "d_mm": 400, "D_mm": 650, "B_mm": 250, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "brass_machined_M1", "dynamic_load_kN": 6331, "static_load_kN": 10600, "fatigue_load_limit_kN": 735, "max_rpm": 500, "reference_speed_rpm": 340, "limiting_speed_rpm": 500, "weight_g": 365000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The SKF 24180 ECAK30/W33 is a 400×650×250 mm spherical roller bearing with a 1:30 tapered bore — SKF catalogue execution for sleeve mounting on a 400 mm plain shaft, retaining the double-row self-aligning barrel-roller design. Numbering ties the bearing to its envelope: 24180-ecak30-w33 means spherical-roller type, dimension series 41, 400 mm bore — which is why the 650×250 mm outline swaps dimensionally with other ISO 15 bearings of the same code. Sleeve mounting is why the K30 execution exists: a plain h9-tolerance shaft is enough because the adapter sleeve supplies the precision seat, and the bearing is removable without pulling over an interference journal — a separate order number from the cylindrical-bore bearing, never a field conversion. With C 6331 kN and C0 10600 kN, the 24180-ecak30-w33 load check covers radial plus moderate axial in either direction — but below the minimum load the rollers skid, so verify P ≥ 0.01·C0 at the lightest operating point. At 400 mm bore, dismount after service is by KM locknut reversal or a hydraulic nut on larger sizes; oil-injection grooves on the bigger sleeves let pressurised oil float the 24180-ecak30-w33 off the taper without scoring either surface.", "applications": [ "heavy rolling-mill work-roll chocks", "large dredger and marine winch drums", "split-housing plummer block arrangements with bearings swapped in situ", "heavy crusher and screen shafts mounted and dismounted with hydraulic nuts" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "sleeve seizure and shaft seat damage from omitting the anti-seize film between withdrawal sleeve and journal before drive-up", "roller-end scoring from starved lubricant at start-up before the grease channel purges", "fretting corrosion on a loose rotating shaft seat or in vibratory stand-still" ], "pitfalls": [ "At 400 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24100-series series at 400 mm bore (650×250 mm) is the heaviest medium-OD execution, built for extreme radial and shock loads at low speed; the 500 r/min ceiling is part of the design, not an afterthought — check it before using it in a faster drive.", "The 24180-ecak30-w33 and its cylindrical-bore counterpart 24180-ecak30-w33 share envelope and load ratings (6331/10600 kN) but are not interchangeable in a housing already fitted for direct shaft mounting — the sleeve changes the assembly stack-up.", "A loose sleeve after the first weeks of service usually means inadequate initial drive-up; re-checking clearance without dismounting is possible through the 250 mm-wide roller rows with feeler gauges — do not simply tighten the KM nut until vibration stops.", "Shaft and housing fillets must clear the bearing chamfer so the 250 mm-wide rings seat square; use an undercut or withdrawal groove rather than an oversized radius that locks on the ring face.", "The 6331/10600 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24180 ECAK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24180-ecak30-w33?", "a": "The SKF 24180 ECAK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 400 mm nominal bore, 650 mm outer diameter and 250 mm width (15.748 × 25.591 × 9.843 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 6331 kN, C0 10600 kN, Pu 735 kN, reference speed 340 r/min, limiting speed 500 r/min, mass about 365000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24180-ecak30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24180-ecak30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 400 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24180-ecak30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24180-ecak30-w33 and 24180-ecak30-w33?", "a": "They share the ISO 15 envelope and the same 6331/10600 kN ratings, but 24180-ecak30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24180-ecak30-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24180", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24180; identical ISO 15 envelope, fits AOH24180 withdrawal sleeve on a 380 mm shaft." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24180-ECAK30-W33", "SKF 24180 ECAK30/W33", "24180 K" ], "locale_variants": {} }, { "sku": "24084-ECAK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24084 ECAK30/W33", "series": "24000-series", "type": "spherical_roller", "d_mm": 420, "D_mm": 620, "B_mm": 200, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "brass_machined_M1", "dynamic_load_kN": 4610, "static_load_kN": 8300, "fatigue_load_limit_kN": 585, "max_rpm": 900, "reference_speed_rpm": 530, "limiting_speed_rpm": 900, "weight_g": 230000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "For sleeve mounting on a 420 mm shaft, SKF order number SKF 24084 ECAK30/W33 is the 1:30 tapered-bore spherical roller bearing in the 24000-series family (dimension series 40 (compact OD, maximum width)); the cylindrical-bore equivalent is a separate order number, 24084-ecak30-w33. On the SKF nameplate, 24084-ecak30-w33 follows the ISO 15 convention: 2 for the spherical roller type, 40 for the dimension series 40 (compact OD, maximum width), final digits 84 for the 420 mm bore. Reading the suffix on 24084-ecak30-w33, the K30 (or EK/CCK30) element changes only the bore — 1:30 taper for sleeve mounting — while the rest of the suffix chain (CC cages with W33 groove) keeps the same internal design, cage and W33 relubrication features as the cylindrical-bore 24084-ecak30-w33. With C 4610 kN and C0 8300 kN, the 24084-ecak30-w33 load check covers radial plus moderate axial in either direction — but below the minimum load the rollers skid, so verify P ≥ 0.01·C0 at the lightest operating point. Mounting on the 1:30 taper is controlled by clearance reduction or measured axial drive-up, never by locknut torque: SKF tables give the target radial-clearance decrease for the 420 mm 24084-ecak30-w33, checked with feeler gauges before and after drive-up.", "applications": [ "heavy rolling-mill work-roll chocks", "large dredger and marine winch drums", "stepped shafts fitted with withdrawal sleeves against a fixed shoulder", "fan and pulley shafts that need periodic bearing removal in the field" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "inner-ring circumferential cracking after over-drive on the tapered seat removes too much radial clearance and the bearing runs preloaded", "roller-end scoring from starved lubricant at start-up before the grease channel purges", "smearing on the roller-raceway contact during skid starts below the minimum load" ], "pitfalls": [ "At 420 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24000-series series at 420 mm bore (620×200 mm) packs maximum roller length into the smallest OD envelope — very high C0 for its size but the lowest speed ceiling; never swap it for a wider-OD 231 bearing without re-checking the housing bore and the speed margin.", "Never apply the drive-up or clearance-reduction figures for this 1:30 tapered 24084-ecak30-w33 to a bearing of the other taper (1:12 vs 1:30); the steeper taper moves far less clearance per nut turn and the targets come from different catalogue tables.", "A loose sleeve after the first weeks of service usually means inadequate initial drive-up; re-checking clearance without dismounting is possible through the 200 mm-wide roller rows with feeler gauges — do not simply tighten the KM nut until vibration stops.", "Never use the tapered-bore CCK30/K30 variant's drive-up figures on this cylindrical-bore 24084-ecak30-w33; clearance reduction targets differ, and over-driving a cylindrical bore onto an oversized journal cracks the inner ring.", "The 4610/8300 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24084 ECAK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24084-ecak30-w33?", "a": "The SKF 24084 ECAK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 420 mm nominal bore, 620 mm outer diameter and 200 mm width (16.535 × 24.409 × 7.874 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 4610 kN, C0 8300 kN, Pu 585 kN, reference speed 530 r/min, limiting speed 900 r/min, mass about 230000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24084-ecak30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24084-ecak30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 420 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24084-ecak30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24084-ecak30-w33 and 24084-ecak30-w33?", "a": "They share the ISO 15 envelope and the same 4610/8300 kN ratings, but 24084-ecak30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24084-ecak30-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24084", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24084; identical ISO 15 envelope, fits AOH24084 withdrawal sleeve on a 400 mm shaft." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24084-ECAK30-W33", "SKF 24084 ECAK30/W33", "24084 K" ], "locale_variants": {} }, { "sku": "24184-ECAK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24184 ECAK30/W33", "series": "24100-series", "type": "spherical_roller", "d_mm": 420, "D_mm": 700, "B_mm": 280, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "brass_machined_M1", "dynamic_load_kN": 7577, "static_load_kN": 12500, "fatigue_load_limit_kN": 850, "max_rpm": 480, "reference_speed_rpm": 320, "limiting_speed_rpm": 480, "weight_g": 470000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The SKF 24184 ECAK30/W33 is a 420×700×280 mm spherical roller bearing with a 1:30 tapered bore — SKF catalogue execution for sleeve mounting on a 420 mm plain shaft, retaining the double-row self-aligning barrel-roller design. The code breaks down as type digit 2 (double-row spherical roller), dimension series 41 (dimension series 41 (medium OD, maximum width)), and bore code 84 = 420 mm; dimensions 420×700×280 mm therefore match the ISO 15 envelope. The K30 in the designation marks the 1:30 tapered bore: SKF mounts it on an H-series adapter sleeve (with KM locknut and MB lock washer) on a plain commercial-grade shaft, or on an AH withdrawal sleeve where the bearing must abut a shaft shoulder. Selection arithmetic: the C0/C ratio is about 1.65 (static 12500 kN against dynamic 7577 kN), typical of a spherical roller sized for heavy combined loads, and the 850 kN fatigue load limit Pu is the equivalent-load floor used in the life calculation. After drive-up, re-check radial clearance and then swing the outer ring through its self-aligning range: the sphered raceway of the 24184-ecak30-w33 must still tilt ≈ 0.5–2.5° freely — a joint that binds after sleeve mounting signals excessive drive-up or a cocked sleeve.", "applications": [ "SAG and ball-mill drive shafts", "large mining crusher main shafts", "long through-shafts in conveyors, where a sleeve seat avoids a precision journal", "stepped shafts fitted with withdrawal sleeves against a fixed shoulder" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "inner-ring circumferential cracking after over-drive on the tapered seat removes too much radial clearance and the bearing runs preloaded", "roller-end scoring from starved lubricant at start-up before the grease channel purges", "hard-particle indentation of the raceway in unfiltered oil or contaminated grease systems" ], "pitfalls": [ "At 420 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24100-series series at 420 mm bore (700×280 mm) is the heaviest medium-OD execution, built for extreme radial and shock loads at low speed; the 480 r/min ceiling is part of the design, not an afterthought — check it before using it in a faster drive.", "The adapter sleeve is selected by actual shaft diameter, not by the 420 mm nominal bearing bore: H-sleeve part numbers span a small diameter range, so two different shaft diameters can use the same 24184-ecak30-w33 with different sleeves.", "Never apply the drive-up or clearance-reduction figures for this 1:30 tapered 24184-ecak30-w33 to a bearing of the other taper (1:12 vs 1:30); the steeper taper moves far less clearance per nut turn and the targets come from different catalogue tables.", "Open spherical roller bearings rely on the housing seals; in screening or crusher duty a failed seal lets grit into the sphered raceway and the 24184-ecak30-w33 pits long before its L10 life.", "The 7577/12500 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24184 ECAK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24184-ecak30-w33?", "a": "The SKF 24184 ECAK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 420 mm nominal bore, 700 mm outer diameter and 280 mm width (16.535 × 27.559 × 11.024 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 7577 kN, C0 12500 kN, Pu 850 kN, reference speed 320 r/min, limiting speed 480 r/min, mass about 470000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24184-ecak30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24184-ecak30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 420 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24184-ecak30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24184-ecak30-w33 and 24184-ecak30-w33?", "a": "They share the ISO 15 envelope and the same 7577/12500 kN ratings, but 24184-ecak30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24184-ecak30-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24184", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24184; identical ISO 15 envelope, fits AOH24184 withdrawal sleeve on a 400 mm shaft." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24184-ECAK30-W33", "SKF 24184 ECAK30/W33", "24184 K" ], "locale_variants": {} }, { "sku": "24088-ECAK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24088 ECAK30/W33", "series": "24000-series", "type": "spherical_roller", "d_mm": 440, "D_mm": 650, "B_mm": 212, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "brass_machined_M1", "dynamic_load_kN": 4987, "static_load_kN": 9150, "fatigue_load_limit_kN": 630, "max_rpm": 850, "reference_speed_rpm": 500, "limiting_speed_rpm": 850, "weight_g": 275000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "For sleeve mounting on a 440 mm shaft, SKF order number SKF 24088 ECAK30/W33 is the 1:30 tapered-bore spherical roller bearing in the 24000-series family (dimension series 40 (compact OD, maximum width)); the cylindrical-bore equivalent is a separate order number, 24088-ecak30-w33. On the SKF nameplate, 24088-ecak30-w33 follows the ISO 15 convention: 2 for the spherical roller type, 40 for the dimension series 40 (compact OD, maximum width), final digits 88 for the 440 mm bore. Sleeve mounting is why the K30 execution exists: a plain h9-tolerance shaft is enough because the adapter sleeve supplies the precision seat, and the bearing is removable without pulling over an interference journal — a separate order number from the cylindrical-bore bearing, never a field conversion. The 630 kN Pu figure feeds the adjusted-life equation at contaminated or partial-film conditions, and the 1.83 C0/C balance shows this execution is tuned to heavy radial-plus-axial duty with misalignment tolerance. Mounting on the 1:30 taper is controlled by clearance reduction or measured axial drive-up, never by locknut torque: SKF tables give the target radial-clearance decrease for the 440 mm 24088-ecak30-w33, checked with feeler gauges before and after drive-up.", "applications": [ "steel-plant continuous-caster segments", "large induced-draft fan rotors", "fan and pulley shafts that need periodic bearing removal in the field", "shafting produced to commercial tolerances, where the adapter sleeve supplies the precision seat" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "sleeve seizure and shaft seat damage from omitting the anti-seize film between withdrawal sleeve and journal before drive-up", "surface distress and smearing when the relubrication interval is exceeded — the W33 groove is only effective if grease actually reaches the roller rows", "false brinelling on standby machines exposed to external vibration" ], "pitfalls": [ "At 440 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24000-series series at 440 mm bore (650×212 mm) packs maximum roller length into the smallest OD envelope — very high C0 for its size but the lowest speed ceiling; never swap it for a wider-OD 231 bearing without re-checking the housing bore and the speed margin.", "The adapter sleeve is selected by actual shaft diameter, not by the 440 mm nominal bearing bore: H-sleeve part numbers span a small diameter range, so two different shaft diameters can use the same 24088-ecak30-w33 with different sleeves.", "The 24088-ecak30-w33 and its cylindrical-bore counterpart 24088-ecak30-w33 share envelope and load ratings (4987/9150 kN) but are not interchangeable in a housing already fitted for direct shaft mounting — the sleeve changes the assembly stack-up.", "Never use the tapered-bore CCK30/K30 variant's drive-up figures on this cylindrical-bore 24088-ecak30-w33; clearance reduction targets differ, and over-driving a cylindrical bore onto an oversized journal cracks the inner ring.", "The 4987/9150 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24088 ECAK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24088-ecak30-w33?", "a": "The SKF 24088 ECAK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 440 mm nominal bore, 650 mm outer diameter and 212 mm width (17.323 × 25.591 × 8.346 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 4987 kN, C0 9150 kN, Pu 630 kN, reference speed 500 r/min, limiting speed 850 r/min, mass about 275000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24088-ecak30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24088-ecak30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 440 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24088-ecak30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24088-ecak30-w33 and 24088-ecak30-w33?", "a": "They share the ISO 15 envelope and the same 4987/9150 kN ratings, but 24088-ecak30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24088-ecak30-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24088", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24088; identical ISO 15 envelope, fits AOH24088 withdrawal sleeve on a 420 mm shaft." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24088-ECAK30-W33", "SKF 24088 ECAK30/W33", "24088 K" ], "locale_variants": {} }, { "sku": "24188-ECAK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24188 ECAK30/W33", "series": "24100-series", "type": "spherical_roller", "d_mm": 440, "D_mm": 720, "B_mm": 280, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "brass_machined_M1", "dynamic_load_kN": 7777, "static_load_kN": 13200, "fatigue_load_limit_kN": 900, "max_rpm": 450, "reference_speed_rpm": 300, "limiting_speed_rpm": 450, "weight_g": 490000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "The SKF 24188 ECAK30/W33 is a 440×720×280 mm spherical roller bearing with a 1:30 tapered bore — SKF catalogue execution for sleeve mounting on a 440 mm plain shaft, retaining the double-row self-aligning barrel-roller design. The code breaks down as type digit 2 (double-row spherical roller), dimension series 41 (dimension series 41 (medium OD, maximum width)), and bore code 88 = 440 mm; dimensions 440×720×280 mm therefore match the ISO 15 envelope. Reading the suffix on 24188-ecak30-w33, the K30 (or EK/CCK30) element changes only the bore — 1:30 taper for sleeve mounting — while the rest of the suffix chain (CC cages with W33 groove) keeps the same internal design, cage and W33 relubrication features as the cylindrical-bore 24188-ecak30-w33. The 140.0 mm radial section height ((720−440)/2) and 490000 g catalogue mass frame a 440 mm bore bearing rated at 7777 kN C — roughly 17.68 kN of dynamic capacity per millimetre of bore before application factors. After drive-up, re-check radial clearance and then swing the outer ring through its self-aligning range: the sphered raceway of the 24188-ecak30-w33 must still tilt ≈ 0.5–2.5° freely — a joint that binds after sleeve mounting signals excessive drive-up or a cocked sleeve.", "applications": [ "wind-turbine main shaft support", "heavy rolling-mill work-roll chocks", "stepped shafts fitted with withdrawal sleeves against a fixed shoulder", "fan and pulley shafts that need periodic bearing removal in the field" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "sleeve seizure and shaft seat damage from omitting the anti-seize film between withdrawal sleeve and journal before drive-up", "surface distress and smearing when the relubrication interval is exceeded — the W33 groove is only effective if grease actually reaches the roller rows", "smearing on the roller-raceway contact during skid starts below the minimum load" ], "pitfalls": [ "At 440 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24100-series series at 440 mm bore (720×280 mm) is the heaviest medium-OD execution, built for extreme radial and shock loads at low speed; the 450 r/min ceiling is part of the design, not an afterthought — check it before using it in a faster drive.", "A loose sleeve after the first weeks of service usually means inadequate initial drive-up; re-checking clearance without dismounting is possible through the 280 mm-wide roller rows with feeler gauges — do not simply tighten the KM nut until vibration stops.", "The adapter sleeve is selected by actual shaft diameter, not by the 440 mm nominal bearing bore: H-sleeve part numbers span a small diameter range, so two different shaft diameters can use the same 24188-ecak30-w33 with different sleeves.", "Open spherical roller bearings rely on the housing seals; in screening or crusher duty a failed seal lets grit into the sphered raceway and the 24188-ecak30-w33 pits long before its L10 life.", "The 7777/13200 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24188 ECAK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24188-ecak30-w33?", "a": "The SKF 24188 ECAK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 440 mm nominal bore, 720 mm outer diameter and 280 mm width (17.323 × 28.346 × 11.024 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 7777 kN, C0 13200 kN, Pu 900 kN, reference speed 300 r/min, limiting speed 450 r/min, mass about 490000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24188-ecak30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24188-ecak30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 440 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24188-ecak30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24188-ecak30-w33 and 24188-ecak30-w33?", "a": "They share the ISO 15 envelope and the same 7777/13200 kN ratings, but 24188-ecak30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24188-ecak30-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24188", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24188; identical ISO 15 envelope, fits AOH24188 withdrawal sleeve on a 420 mm shaft." }, { "equiv_sku": "C4188-MB", "equiv_brand": "SKF", "level": "full", "note": "SKF CARB toroidal bearing C 4188 MB shares the 440×720×280 mm envelope with ratings within 10 %; it self-aligns but floats axially and cannot locate the shaft — locating/non-locating pair, not a substitute." }, { "equiv_sku": "C4188-K30MB", "equiv_brand": "SKF", "level": "full", "note": "SKF CARB toroidal bearing C 4188 K30MB shares the 440×720×280 mm envelope with ratings within 10 %; it self-aligns but floats axially and cannot locate the shaft — locating/non-locating pair, not a substitute." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24188-ECAK30-W33", "SKF 24188 ECAK30/W33", "24188 K" ], "locale_variants": {} }, { "sku": "24092-ECAK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24092 ECAK30/W33", "series": "24000-series", "type": "spherical_roller", "d_mm": 460, "D_mm": 680, "B_mm": 218, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "brass_machined_M1", "dynamic_load_kN": 5401, "static_load_kN": 10000, "fatigue_load_limit_kN": 670, "max_rpm": 800, "reference_speed_rpm": 480, "limiting_speed_rpm": 800, "weight_g": 300000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "In SKF catalogue PUB BU/P1 17000, 24092-ecak30-w33 denotes the tapered-bore version (K30 suffix, taper 1:30) of the 24000-series spherical roller bearing: dimensioned 460×680×218 mm, it seats on an adapter or withdrawal sleeve rather than directly on a machined journal. The code breaks down as type digit 2 (double-row spherical roller), dimension series 40 (dimension series 40 (compact OD, maximum width)), and bore code 92 = 460 mm; dimensions 460×680×218 mm therefore match the ISO 15 envelope. Reading the suffix on 24092-ecak30-w33, the K30 (or EK/CCK30) element changes only the bore — 1:30 taper for sleeve mounting — while the rest of the suffix chain (CC cages with W33 groove) keeps the same internal design, cage and W33 relubrication features as the cylindrical-bore 24092-ecak30-w33. The 110.0 mm radial section height ((680−460)/2) and 300000 g catalogue mass frame a 460 mm bore bearing rated at 5401 kN C — roughly 11.74 kN of dynamic capacity per millimetre of bore before application factors. On an H adapter sleeve the 460 mm shaft seat only needs an h9 plain journal; slide the sleeve into the 24092-ecak30-w33 inner ring, tighten the KM nut against the MB washer until the catalogue clearance-reduction value is reached, then lock the washer tab.", "applications": [ "wind-turbine main shaft support", "heavy rolling-mill work-roll chocks", "heavy crusher and screen shafts mounted and dismounted with hydraulic nuts", "long through-shafts in conveyors, where a sleeve seat avoids a precision journal" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "sleeve seizure and shaft seat damage from omitting the anti-seize film between withdrawal sleeve and journal before drive-up", "roller-end scoring from starved lubricant at start-up before the grease channel purges", "smearing on the roller-raceway contact during skid starts below the minimum load" ], "pitfalls": [ "At 460 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24000-series series at 460 mm bore (680×218 mm) packs maximum roller length into the smallest OD envelope — very high C0 for its size but the lowest speed ceiling; never swap it for a wider-OD 231 bearing without re-checking the housing bore and the speed margin.", "The 24092-ecak30-w33 and its cylindrical-bore counterpart 24092-ecak30-w33 share envelope and load ratings (5401/10000 kN) but are not interchangeable in a housing already fitted for direct shaft mounting — the sleeve changes the assembly stack-up.", "A loose sleeve after the first weeks of service usually means inadequate initial drive-up; re-checking clearance without dismounting is possible through the 218 mm-wide roller rows with feeler gauges — do not simply tighten the KM nut until vibration stops.", "Never use the tapered-bore CCK30/K30 variant's drive-up figures on this cylindrical-bore 24092-ecak30-w33; clearance reduction targets differ, and over-driving a cylindrical bore onto an oversized journal cracks the inner ring.", "The 5401/10000 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24092 ECAK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24092-ecak30-w33?", "a": "The SKF 24092 ECAK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 460 mm nominal bore, 680 mm outer diameter and 218 mm width (18.11 × 26.772 × 8.583 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 5401 kN, C0 10000 kN, Pu 670 kN, reference speed 480 r/min, limiting speed 800 r/min, mass about 300000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24092-ecak30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24092-ecak30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 460 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24092-ecak30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24092-ecak30-w33 and 24092-ecak30-w33?", "a": "They share the ISO 15 envelope and the same 5401/10000 kN ratings, but 24092-ecak30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24092-ecak30-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24092", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24092; identical ISO 15 envelope, fits AOH24092 withdrawal sleeve on a 440 mm shaft." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24092-ECAK30-W33", "SKF 24092 ECAK30/W33", "24092 K" ], "locale_variants": {} }, { "sku": "24192-ECAK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24192 ECAK30/W33", "series": "24100-series", "type": "spherical_roller", "d_mm": 460, "D_mm": 760, "B_mm": 300, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "brass_machined_M1", "dynamic_load_kN": 8608, "static_load_kN": 14600, "fatigue_load_limit_kN": 1000, "max_rpm": 430, "reference_speed_rpm": 280, "limiting_speed_rpm": 430, "weight_g": 590000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Ordering number SKF 24192 ECAK30/W33 in SKF catalogue PUB BU/P1 17000 is a double-row spherical roller bearing with a tapered bore (1:30), intended for an H-series adapter sleeve or AH withdrawal sleeve, with a one-piece machined brass cage guided on the inner ring (CA design) and the same 460×760×300 mm ISO 15 outline as its cylindrical-bore counterpart. Reading the designation: the leading 2 marks a spherical roller bearing, the 41 is the ISO 15 dimension series (dimension series 41 (medium OD, maximum width)), and the last two digits encode the 460 mm bore; the 760 mm OD and 300 mm width follow the ISO 15 general plan. Reading the suffix on 24192-ecak30-w33, the K30 (or EK/CCK30) element changes only the bore — 1:30 taper for sleeve mounting — while the rest of the suffix chain (CC cages with W33 groove) keeps the same internal design, cage and W33 relubrication features as the cylindrical-bore 24192-ecak30-w33. Selection arithmetic: the C0/C ratio is about 1.70 (static 14600 kN against dynamic 8608 kN), typical of a spherical roller sized for heavy combined loads, and the 1000 kN fatigue load limit Pu is the equivalent-load floor used in the life calculation. Mounting on the 1:30 taper is controlled by clearance reduction or measured axial drive-up, never by locknut torque: SKF tables give the target radial-clearance decrease for the 460 mm 24192-ecak30-w33, checked with feeler gauges before and after drive-up.", "applications": [ "SAG and ball-mill drive shafts", "large mining crusher main shafts", "heavy crusher and screen shafts mounted and dismounted with hydraulic nuts", "long through-shafts in conveyors, where a sleeve seat avoids a precision journal" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "sleeve seizure and shaft seat damage from omitting the anti-seize film between withdrawal sleeve and journal before drive-up", "surface distress and smearing when the relubrication interval is exceeded — the W33 groove is only effective if grease actually reaches the roller rows", "smearing on the roller-raceway contact during skid starts below the minimum load" ], "pitfalls": [ "At 460 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24100-series series at 460 mm bore (760×300 mm) is the heaviest medium-OD execution, built for extreme radial and shock loads at low speed; the 430 r/min ceiling is part of the design, not an afterthought — check it before using it in a faster drive.", "Never apply the drive-up or clearance-reduction figures for this 1:30 tapered 24192-ecak30-w33 to a bearing of the other taper (1:12 vs 1:30); the steeper taper moves far less clearance per nut turn and the targets come from different catalogue tables.", "The adapter sleeve is selected by actual shaft diameter, not by the 460 mm nominal bearing bore: H-sleeve part numbers span a small diameter range, so two different shaft diameters can use the same 24192-ecak30-w33 with different sleeves.", "The self-aligning feature is not a license to ignore alignment: beyond ≈ 0.5–2.5° (series-dependent) the edge loading eats the fatigue margin, and seal drag grows as the rings tilt.", "The 8608/14600 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24192 ECAK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24192-ecak30-w33?", "a": "The SKF 24192 ECAK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 460 mm nominal bore, 760 mm outer diameter and 300 mm width (18.11 × 29.921 × 11.811 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 8608 kN, C0 14600 kN, Pu 1000 kN, reference speed 280 r/min, limiting speed 430 r/min, mass about 590000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24192-ecak30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24192-ecak30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 460 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24192-ecak30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24192-ecak30-w33 and 24192-ecak30-w33?", "a": "They share the ISO 15 envelope and the same 8608/14600 kN ratings, but 24192-ecak30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24192-ecak30-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24192", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24192; identical ISO 15 envelope, fits AOH24192 withdrawal sleeve on a 440 mm shaft." }, { "equiv_sku": "C4192-MB", "equiv_brand": "SKF", "level": "full", "note": "SKF CARB toroidal bearing C 4192 MB shares the 460×760×300 mm envelope with ratings within 10 %; it self-aligns but floats axially and cannot locate the shaft — locating/non-locating pair, not a substitute." }, { "equiv_sku": "C4192-K30MB", "equiv_brand": "SKF", "level": "full", "note": "SKF CARB toroidal bearing C 4192 K30MB shares the 460×760×300 mm envelope with ratings within 10 %; it self-aligns but floats axially and cannot locate the shaft — locating/non-locating pair, not a substitute." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24192-ECAK30-W33", "SKF 24192 ECAK30/W33", "24192 K" ], "locale_variants": {} }, { "sku": "24096-ECAK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24096 ECAK30/W33", "series": "24000-series", "type": "spherical_roller", "d_mm": 480, "D_mm": 700, "B_mm": 218, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "brass_machined_M1", "dynamic_load_kN": 5524, "static_load_kN": 10400, "fatigue_load_limit_kN": 695, "max_rpm": 750, "reference_speed_rpm": 450, "limiting_speed_rpm": 750, "weight_g": 310000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "In SKF catalogue PUB BU/P1 17000, 24096-ecak30-w33 denotes the tapered-bore version (K30 suffix, taper 1:30) of the 24000-series spherical roller bearing: dimensioned 480×700×218 mm, it seats on an adapter or withdrawal sleeve rather than directly on a machined journal. Digit by digit, 24096-ecak30-w33 reads as bearing type 2 (spherical roller, two barrel-roller rows), dimension series 40, and bore reference 96 resolving to 480 mm; 700 mm OD and 218 mm width are the matching ISO 15 boundary values. Note that K30 means the 1:30 taper used on dimension series 40/41; the more common K means 1:12. Adapter sleeves (H) and withdrawal sleeves (AH) are ordered separately by shaft diameter, and the KM locknut plus MB lock washer used for drive-up are also separate components. At 450 r/min reference speed the 110.0 mm-section 24096-ecak30-w33 is governed thermally by lubricant flow through the W33 groove and the two-row roller complement; grease or oil selection should be made against that value, with 750 r/min as the mechanical ceiling. Over-driving the 24096-ecak30-w33 up its sleeve pinches radial clearance below the residual minimum and can crack the inner ring in service; under-driving leaves the sleeve seat loose, so the ring creeps and frets the sleeve — measure, do not estimate.", "applications": [ "large induced-draft fan rotors", "SAG and ball-mill drive shafts", "stepped shafts fitted with withdrawal sleeves against a fixed shoulder", "fan and pulley shafts that need periodic bearing removal in the field" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "inner-ring circumferential cracking after over-drive on the tapered seat removes too much radial clearance and the bearing runs preloaded", "roller-end scoring from starved lubricant at start-up before the grease channel purges", "seal-lip wear and grease purge loss when an open bearing is run without functioning housing seals" ], "pitfalls": [ "At 480 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24000-series series at 480 mm bore (700×218 mm) packs maximum roller length into the smallest OD envelope — very high C0 for its size but the lowest speed ceiling; never swap it for a wider-OD 231 bearing without re-checking the housing bore and the speed margin.", "The adapter sleeve is selected by actual shaft diameter, not by the 480 mm nominal bearing bore: H-sleeve part numbers span a small diameter range, so two different shaft diameters can use the same 24096-ecak30-w33 with different sleeves.", "Never apply the drive-up or clearance-reduction figures for this 1:30 tapered 24096-ecak30-w33 to a bearing of the other taper (1:12 vs 1:30); the steeper taper moves far less clearance per nut turn and the targets come from different catalogue tables.", "Shaft and housing fillets must clear the bearing chamfer so the 218 mm-wide rings seat square; use an undercut or withdrawal groove rather than an oversized radius that locks on the ring face.", "The 5524/10400 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24096 ECAK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24096-ecak30-w33?", "a": "The SKF 24096 ECAK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 480 mm nominal bore, 700 mm outer diameter and 218 mm width (18.898 × 27.559 × 8.583 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 5524 kN, C0 10400 kN, Pu 695 kN, reference speed 450 r/min, limiting speed 750 r/min, mass about 310000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24096-ecak30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24096-ecak30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 480 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24096-ecak30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24096-ecak30-w33 and 24096-ecak30-w33?", "a": "They share the ISO 15 envelope and the same 5524/10400 kN ratings, but 24096-ecak30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24096-ecak30-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24096", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24096; identical ISO 15 envelope, fits AOH24096 withdrawal sleeve on a 460 mm shaft." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24096-ECAK30-W33", "SKF 24096 ECAK30/W33", "24096 K" ], "locale_variants": {} }, { "sku": "24196-ECAK30-W33", "brand": "SKF", "manufacturer_designation": "SKF 24196 ECAK30/W33", "series": "24100-series", "type": "spherical_roller", "d_mm": 480, "D_mm": 790, "B_mm": 308, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "brass_machined_M1", "dynamic_load_kN": 9198, "static_load_kN": 15600, "fatigue_load_limit_kN": 1040, "max_rpm": 400, "reference_speed_rpm": 260, "limiting_speed_rpm": 400, "weight_g": 635000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 15", "naming_rule_text": "Ordering number SKF 24196 ECAK30/W33 in SKF catalogue PUB BU/P1 17000 is a double-row spherical roller bearing with a tapered bore (1:30), intended for an H-series adapter sleeve or AH withdrawal sleeve, with a one-piece machined brass cage guided on the inner ring (CA design) and the same 480×790×308 mm ISO 15 outline as its cylindrical-bore counterpart. Reading the designation: the leading 2 marks a spherical roller bearing, the 41 is the ISO 15 dimension series (dimension series 41 (medium OD, maximum width)), and the last two digits encode the 480 mm bore; the 790 mm OD and 308 mm width follow the ISO 15 general plan. Sleeve mounting is why the K30 execution exists: a plain h9-tolerance shaft is enough because the adapter sleeve supplies the precision seat, and the bearing is removable without pulling over an interference journal — a separate order number from the cylindrical-bore bearing, never a field conversion. The 155.0 mm radial section height ((790−480)/2) and 635000 g catalogue mass frame a 480 mm bore bearing rated at 9198 kN C — roughly 19.16 kN of dynamic capacity per millimetre of bore before application factors. Mounting on the 1:30 taper is controlled by clearance reduction or measured axial drive-up, never by locknut torque: SKF tables give the target radial-clearance decrease for the 480 mm 24196-ecak30-w33, checked with feeler gauges before and after drive-up.", "applications": [ "wind-turbine main shaft support", "heavy rolling-mill work-roll chocks", "long through-shafts in conveyors, where a sleeve seat avoids a precision journal", "stepped shafts fitted with withdrawal sleeves against a fixed shoulder" ], "failure_modes": [ "raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating", "inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range", "fretting corrosion and sleeve-seat scoring when drive-up is insufficient and the tapered inner ring creeps on the adapter sleeve", "roller-end scoring from starved lubricant at start-up before the grease channel purges", "false brinelling on standby machines exposed to external vibration" ], "pitfalls": [ "At 480 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.", "The 24100-series series at 480 mm bore (790×308 mm) is the heaviest medium-OD execution, built for extreme radial and shock loads at low speed; the 400 r/min ceiling is part of the design, not an afterthought — check it before using it in a faster drive.", "The adapter sleeve is selected by actual shaft diameter, not by the 480 mm nominal bearing bore: H-sleeve part numbers span a small diameter range, so two different shaft diameters can use the same 24196-ecak30-w33 with different sleeves.", "A loose sleeve after the first weeks of service usually means inadequate initial drive-up; re-checking clearance without dismounting is possible through the 308 mm-wide roller rows with feeler gauges — do not simply tighten the KM nut until vibration stops.", "The self-aligning feature is not a license to ignore alignment: beyond ≈ 0.5–2.5° (series-dependent) the edge loading eats the fatigue margin, and seal drag grows as the rings tilt.", "The 9198/15600 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24196 ECAK30/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification." ], "faq": [ { "q": "What are the dimensions and catalogue data of 24196-ecak30-w33?", "a": "The SKF 24196 ECAK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 480 mm nominal bore, 790 mm outer diameter and 308 mm width (18.898 × 31.102 × 12.126 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 9198 kN, C0 15600 kN, Pu 1040 kN, reference speed 260 r/min, limiting speed 400 r/min, mass about 635000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft." }, { "q": "What does the K30 suffix mean on 24196-ecak30-w33?", "a": "K30 (written CCK30/W33 in the CC execution) marks the 1:30 tapered bore for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder." }, { "q": "Which adapter sleeve fits the 24196-ecak30-w33?", "a": "The sleeve is selected by the actual shaft diameter in millimetres, not only by the 480 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size." }, { "q": "How is the 24196-ecak30-w33 driven up and checked?", "a": "Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret." }, { "q": "What is the difference between 24196-ecak30-w33 and 24196-ecak30-w33?", "a": "They share the ISO 15 envelope and the same 9198/15600 kN ratings, but 24196-ecak30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24196-ecak30-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement." } ], "cross_ref": [ { "equiv_sku": "24196", "equiv_brand": "SKF", "level": "full", "note": "Tapered-bore (1:30) sleeve-mounted execution of 24196; identical ISO 15 envelope, fits AOH24196 withdrawal sleeve on a 460 mm shaft." } ], "source_ref": "https://www.skf.com/group/products/rolling-bearings/roller-bearings/spherical-roller-bearings", "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions", "extracted_at": "2026-09-26", "last_verified": "2026-09-26", "confidence_score": 0.7, "status": "published", "aliases": [ "24196-ECAK30-W33", "SKF 24196 ECAK30/W33", "24196 K" ], "locale_variants": {} }, { "sku": "23014", "brand": "GENERIC-ISO", "series": "23000-series", "type": "spherical_roller", "d_mm": 70, "D_mm": 110, "B_mm": 27, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 779, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 23000-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 23014 encode the bore: code 14 = 70 mm (code × 5 from 04 upward). The ISO 15 envelope is 110 mm outside diameter and 27 mm width — 2.756 × 4.331 × 1.063 in, with a 20.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "paper machine felt and press rolls", "industrial gearbox and drive shafts", "elevator winches and hoist drums", "process crane travel wheels", "conveyor head and tail pulleys" ], "failure_modes": [ "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter" ], "pitfalls": [ "On this 70 mm-bore 23014, specify C3 clearance as the default for an interference inner-ring fit and verify residual play after mounting; a medium-section row that ran free on the bench can be fully clamped at operating temperature on the 70 mm shaft.", "The 230 series keeps the outside diameter one step below the 222 medium row at the same bore (110 mm against roughly a size larger), which raises shaft support without growing the housing — the flip side is that its 20.0 mm section concentrates load, so seat finish, shoulder squareness and housing stiffness matter more than on a wider 223 row.", "Thermal soak matters on this 70 mm-bore row: a 110 mm housing heating faster than the shaft closes the 20.0 mm section's internal clearance, so a mount that ran quiet cold can seize hot — start from C3/C4 and verify the operating-temperature play before signing off the 27 mm assembly.", "Check the shoulder geometry for 23014: a generous fillet on the 70 mm shaft looks strong but stops the 27 mm inner ring seating home; use the catalogue corner-relief radius and provide a withdrawal groove so the 20.0 mm-section outer ring presses flush in the 110 mm housing.", "Large 23014 tapers should be mounted with a hydraulic nut or oil injection: controlled drive-up sets the residual radial clearance on the 27 mm-wide double row, whereas bar-and-spanner force either under-drives (fretting) or over-drives (thermal seizure on first hot run).", "When reusing a sleeve-mounted 23014, inspect the adapter and lock parts together with the bearing: a stretched sleeve or a bent lockwasher tab that let the inner ring creep on the 70 mm journal must be replaced, or the new bearing frets the same seat.", "Spherical rollers need a minimum radial load to keep the rollers driven — as a rule of thumb about 2% of the basic dynamic load rating; an unloaded 23014 on an idler or in a cold-start drive will skid and smear, so add preload, reduce the bearing size or use a sealed grease-filled variant.", "Choose the bore type deliberately: plain 23014 takes a cylindrical seat, while the K variant has a 1:12 tapered bore and mounts on an adapter sleeve (H3xx series) over a plain commercial shaft or directly on a tapered journal — the two mounting procedures are not interchangeable." ], "faq": [ { "q": "What are the dimensions of a 23014 spherical roller bearing?", "a": "A 23014 double-row spherical roller bearing per ISO 15 has a 70 mm bore, 110 mm outer diameter and 27 mm width (2.756 × 4.331 × 1.063 in), a 20.0 mm radial section and roughly 779 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 23014 bore code work?", "a": "The leading 2 in 23014 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 14: 14 × 5 = 70 mm. The 110 mm OD and 27 mm width come from the dimension series (23000), not from the bore code alone." }, { "q": "How much misalignment can a 23014 accommodate?", "a": "Thanks to the sphered outer ring raceway, 23014 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 23014 and 23014K?", "a": "The plain 23014 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 23014 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [ { "equiv_sku": "23014", "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.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "23014K", "23014-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "23015", "brand": "GENERIC-ISO", "series": "23000-series", "type": "spherical_roller", "d_mm": 75, "D_mm": 115, "B_mm": 30, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 914, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 23000-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 23015 encode the bore: code 15 = 75 mm (code × 5 from 04 upward). The ISO 15 envelope is 115 mm outside diameter and 30 mm width — 2.953 × 4.528 × 1.181 in, with a 20.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "industrial gearbox and drive shafts", "elevator winches and hoist drums", "process crane travel wheels", "conveyor head and tail pulleys", "vibrating screens, feeders and shakeout machines" ], "failure_modes": [ "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime" ], "pitfalls": [ "On this 75 mm-bore 23015, specify C3 clearance as the default for an interference inner-ring fit and verify residual play after mounting; a medium-section row that ran free on the bench can be fully clamped at operating temperature on the 75 mm shaft.", "The 230 series (ISO 15 dimension series 30) pairs a wide 30 mm section with a compact 115 mm OD at 75 mm bore — the radial envelope is one step smaller than the 222 medium series, so it carries heavy radial load in restricted housing space; it is not dimensionally interchangeable with a 222 or 223 row on the same bore, so verify OD and width before substitution.", "Housing stiffness governs the 23015: with the load carried on a 115 mm OD but only a 20.0 mm radial section feeding it, a soft or ribbed thin housing lets the outer ring flex and the sphered raceway misreads it as misalignment — support the housing boss fully around the 30 mm width.", "The 30 mm-wide 23015 seats against shaft and housing shoulders whose fillet must clear the bearing chamfer: keep the corner radius small enough that the 75 mm bore and 115 mm OD faces abut square — an undercut beats an oversized radius, which lifts the ring and edge-loads the 20.0 mm section.", "For a cylindrical-bore 23015, warm the inner ring to 80–100 °C (induction heater, never a flame) and slide it dry to the shoulder of the 75 mm shaft; cooling creates the interference, while hammering cold through the 115 mm assembly dents the sphered raceways.", "Relubricate 23015 through the W33 groove while the shaft turns slowly so fresh grease flushes the full 30 mm-wide roller set; pumping grease into a stationary bearing channels it past one row and leaves the other side of the 75 mm bore starved.", "Choose the bore type deliberately: plain 23015 takes a cylindrical seat, while the K variant has a 1:12 tapered bore and mounts on an adapter sleeve (H3xx series) over a plain commercial shaft or directly on a tapered journal — the two mounting procedures are not interchangeable.", "Order clearance for the mounting method: an interference fit on a rotating inner ring plus thermal growth eats into CN play, so most industrial 75 mm-bore mounts use C3, vibrating screens use C4, and CN is mainly for loose/split-housing fits — the designation suffix states the class." ], "faq": [ { "q": "What are the dimensions of a 23015 spherical roller bearing?", "a": "A 23015 double-row spherical roller bearing per ISO 15 has a 75 mm bore, 115 mm outer diameter and 30 mm width (2.953 × 4.528 × 1.181 in), a 20.0 mm radial section and roughly 914 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 23015 bore code work?", "a": "The leading 2 in 23015 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 15: 15 × 5 = 75 mm. The 115 mm OD and 30 mm width come from the dimension series (23000), not from the bore code alone." }, { "q": "How much misalignment can a 23015 accommodate?", "a": "Thanks to the sphered outer ring raceway, 23015 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 23015 and 23015K?", "a": "The plain 23015 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 23015 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [ { "equiv_sku": "23015", "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.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "23015K", "23015-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "23016", "brand": "GENERIC-ISO", "series": "23000-series", "type": "spherical_roller", "d_mm": 80, "D_mm": 125, "B_mm": 35, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 1294, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 23000-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 23016 encode the bore: code 16 = 80 mm (code × 5 from 04 upward). The ISO 15 envelope is 125 mm outside diameter and 35 mm width — 3.15 × 4.921 × 1.378 in, with a 22.5 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "heavy conveyor drum pulleys", "cement and aggregate processing machinery", "mining and aggregate vibrating screens", "jaw and cone crusher eccentric shafts", "paper machine drying cylinders" ], "failure_modes": [ "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade" ], "pitfalls": [ "The large 80 mm-bore 23016 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 35 mm double-row assembly cannot be drifted into position without brinelling.", "In vibrating-screen and feeder duty the 230 row is a common pick: at 80 mm bore the 23016 gives a 125×35 mm envelope with a wide, stiff section, but it must then run C4 clearance with a vibratory-rated cage — a standard CN row with a plain stamped cage will gall and fail early under the same duty.", "Drive-up a sleeve-mounted 23016 on residual clearance, not feel: the 80 mm K taper pulls the wide 35 mm inner ring up quickly, and every 0.01 mm of radial clearance removed is real preload on a 22.5 mm section — measure with feeler gauges at the unloaded roller row before locking the KM nut.", "Before fitting 23016, machine the 80 mm shaft seat and 125 mm housing bore with a relief or small fillet so nothing bridges the bearing chamfer; the 35 mm-wide rings only load correctly when the full faces abut, and a large radius pinches the 22.5 mm radial section.", "On a K tapered bore with adapter sleeve, tighten the KM locknut to drive the 23016 up the sleeve, rotating the inner ring, and stop on residual clearance — measured with feelers at the unloaded rollers — not on torque alone; then lock the tab washer so the 80 mm seat cannot creep.", "Read the damage pattern on a removed 23016: spalling concentrated on one side of the 125 mm outer race points to misalignment or thrust overload, while uniform roller-end smearing means minimum-load skidding — the two failures demand opposite corrections.", "Order clearance for the mounting method: an interference fit on a rotating inner ring plus thermal growth eats into CN play, so most industrial 80 mm-bore mounts use C3, vibrating screens use C4, and CN is mainly for loose/split-housing fits — the designation suffix states the class.", "Specify W33 when the 35 mm-wide bearing must be relubricated in place: it is the outer-ring annular groove with lubrication holes; without W33 grease only reaches the contacts through the shaft or housing arrangement." ], "faq": [ { "q": "What are the dimensions of a 23016 spherical roller bearing?", "a": "A 23016 double-row spherical roller bearing per ISO 15 has a 80 mm bore, 125 mm outer diameter and 35 mm width (3.15 × 4.921 × 1.378 in), a 22.5 mm radial section and roughly 1294 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 23016 bore code work?", "a": "The leading 2 in 23016 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 16: 16 × 5 = 80 mm. The 125 mm OD and 35 mm width come from the dimension series (23000), not from the bore code alone." }, { "q": "How much misalignment can a 23016 accommodate?", "a": "Thanks to the sphered outer ring raceway, 23016 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 23016 and 23016K?", "a": "The plain 23016 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 23016 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [ { "equiv_sku": "23016", "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.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "23016K", "23016-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "23017", "brand": "GENERIC-ISO", "series": "23000-series", "type": "spherical_roller", "d_mm": 85, "D_mm": 130, "B_mm": 36, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 1396, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 23000-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 23017 encode the bore: code 17 = 85 mm (code × 5 from 04 upward). The ISO 15 envelope is 130 mm outside diameter and 36 mm width — 3.346 × 5.118 × 1.417 in, with a 22.5 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "cement and aggregate processing machinery", "mining and aggregate vibrating screens", "jaw and cone crusher eccentric shafts", "paper machine drying cylinders", "large gear drives and mill pinions" ], "failure_modes": [ "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely" ], "pitfalls": [ "The large 85 mm-bore 23017 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 36 mm double-row assembly cannot be drifted into position without brinelling.", "The 230 series keeps the outside diameter one step below the 222 medium row at the same bore (130 mm against roughly a size larger), which raises shaft support without growing the housing — the flip side is that its 22.5 mm section concentrates load, so seat finish, shoulder squareness and housing stiffness matter more than on a wider 223 row.", "Grease life on the 23017 is set by the slow, dirty regime it usually works in: relubricate through the W33 groove until old grease flushes clear of the full 36 mm-wide double row, because the 22.5 mm section gives contamination little room to fall away from the 130 mm raceway on its own.", "Check the shoulder geometry for 23017: a generous fillet on the 85 mm shaft looks strong but stops the 36 mm inner ring seating home; use the catalogue corner-relief radius and provide a withdrawal groove so the 22.5 mm-section outer ring presses flush in the 130 mm housing.", "Large 23017 tapers should be mounted with a hydraulic nut or oil injection: controlled drive-up sets the residual radial clearance on the 36 mm-wide double row, whereas bar-and-spanner force either under-drives (fretting) or over-drives (thermal seizure on first hot run).", "When reusing a sleeve-mounted 23017, inspect the adapter and lock parts together with the bearing: a stretched sleeve or a bent lockwasher tab that let the inner ring creep on the 85 mm journal must be replaced, or the new bearing frets the same seat.", "Specify W33 when the 36 mm-wide bearing must be relubricated in place: it is the outer-ring annular groove with lubrication holes; without W33 grease only reaches the contacts through the shaft or housing arrangement.", "Press 23017 using the right ring: force on the inner ring for an interference shaft fit and on the outer ring for a housing fit — transmitting mounting force through the barrel rollers brinells the sphered raceways of the 130 mm assembly." ], "faq": [ { "q": "What are the dimensions of a 23017 spherical roller bearing?", "a": "A 23017 double-row spherical roller bearing per ISO 15 has a 85 mm bore, 130 mm outer diameter and 36 mm width (3.346 × 5.118 × 1.417 in), a 22.5 mm radial section and roughly 1396 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 23017 bore code work?", "a": "The leading 2 in 23017 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 17: 17 × 5 = 85 mm. The 130 mm OD and 36 mm width come from the dimension series (23000), not from the bore code alone." }, { "q": "How much misalignment can a 23017 accommodate?", "a": "Thanks to the sphered outer ring raceway, 23017 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 23017 and 23017K?", "a": "The plain 23017 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 23017 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [ { "equiv_sku": "23017", "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.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "23017K", "23017-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "23018", "brand": "GENERIC-ISO", "series": "23000-series", "type": "spherical_roller", "d_mm": 90, "D_mm": 140, "B_mm": 37, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 1705, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 23000-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 23018 encode the bore: code 18 = 90 mm (code × 5 from 04 upward). The ISO 15 envelope is 140 mm outside diameter and 37 mm width — 3.543 × 5.512 × 1.457 in, with a 25.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "mining and aggregate vibrating screens", "jaw and cone crusher eccentric shafts", "paper machine drying cylinders", "large gear drives and mill pinions", "heavy conveyor drum pulleys" ], "failure_modes": [ "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely", "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing" ], "pitfalls": [ "The large 90 mm-bore 23018 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 37 mm double-row assembly cannot be drifted into position without brinelling.", "The 230 series (ISO 15 dimension series 30) pairs a wide 37 mm section with a compact 140 mm OD at 90 mm bore — the radial envelope is one step smaller than the 222 medium series, so it carries heavy radial load in restricted housing space; it is not dimensionally interchangeable with a 222 or 223 row on the same bore, so verify OD and width before substitution.", "Check shaft deflection across the 23018 span: the wide 37 mm section tolerates some misalignment through the sphered raceway, but a bent shaft between two 230-series rows alternates the load path every revolution and frets both 90 mm seats — align to the catalogue angular limit under load, not at standstill.", "The 37 mm-wide 23018 seats against shaft and housing shoulders whose fillet must clear the bearing chamfer: keep the corner radius small enough that the 90 mm bore and 140 mm OD faces abut square — an undercut beats an oversized radius, which lifts the ring and edge-loads the 25.0 mm section.", "For a cylindrical-bore 23018, warm the inner ring to 80–100 °C (induction heater, never a flame) and slide it dry to the shoulder of the 90 mm shaft; cooling creates the interference, while hammering cold through the 140 mm assembly dents the sphered raceways.", "Relubricate 23018 through the W33 groove while the shaft turns slowly so fresh grease flushes the full 37 mm-wide roller set; pumping grease into a stationary bearing channels it past one row and leaves the other side of the 90 mm bore starved.", "Press 23018 using the right ring: force on the inner ring for an interference shaft fit and on the outer ring for a housing fit — transmitting mounting force through the barrel rollers brinells the sphered raceways of the 140 mm assembly.", "Match the cage to the duty: the E/CC stamped window-steel cage is the standard for general 23018 service, while the machined brass CA cage is preferred for heavy shock and vibratory applications — never replace a CA row with a CC row in a screen or crusher without re-rating." ], "faq": [ { "q": "What are the dimensions of a 23018 spherical roller bearing?", "a": "A 23018 double-row spherical roller bearing per ISO 15 has a 90 mm bore, 140 mm outer diameter and 37 mm width (3.543 × 5.512 × 1.457 in), a 25.0 mm radial section and roughly 1705 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 23018 bore code work?", "a": "The leading 2 in 23018 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 18: 18 × 5 = 90 mm. The 140 mm OD and 37 mm width come from the dimension series (23000), not from the bore code alone." }, { "q": "How much misalignment can a 23018 accommodate?", "a": "Thanks to the sphered outer ring raceway, 23018 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 23018 and 23018K?", "a": "The plain 23018 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 23018 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [ { "equiv_sku": "23018", "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.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "23018K", "23018-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "23019", "brand": "GENERIC-ISO", "series": "23000-series", "type": "spherical_roller", "d_mm": 95, "D_mm": 145, "B_mm": 35, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 1683, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 23000-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 23019 encode the bore: code 19 = 95 mm (code × 5 from 04 upward). The ISO 15 envelope is 145 mm outside diameter and 35 mm width — 3.74 × 5.709 × 1.378 in, with a 25.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "jaw and cone crusher eccentric shafts", "paper machine drying cylinders", "large gear drives and mill pinions", "heavy conveyor drum pulleys", "cement and aggregate processing machinery" ], "failure_modes": [ "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely", "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty" ], "pitfalls": [ "The large 95 mm-bore 23019 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 35 mm double-row assembly cannot be drifted into position without brinelling.", "In vibrating-screen and feeder duty the 230 row is a common pick: at 95 mm bore the 23019 gives a 145×35 mm envelope with a wide, stiff section, but it must then run C4 clearance with a vibratory-rated cage — a standard CN row with a plain stamped cage will gall and fail early under the same duty.", "Thermal soak matters on this 95 mm-bore row: a 145 mm housing heating faster than the shaft closes the 25.0 mm section's internal clearance, so a mount that ran quiet cold can seize hot — start from C3/C4 and verify the operating-temperature play before signing off the 35 mm assembly.", "Before fitting 23019, machine the 95 mm shaft seat and 145 mm housing bore with a relief or small fillet so nothing bridges the bearing chamfer; the 35 mm-wide rings only load correctly when the full faces abut, and a large radius pinches the 25.0 mm radial section.", "On a K tapered bore with adapter sleeve, tighten the KM locknut to drive the 23019 up the sleeve, rotating the inner ring, and stop on residual clearance — measured with feelers at the unloaded rollers — not on torque alone; then lock the tab washer so the 95 mm seat cannot creep.", "Read the damage pattern on a removed 23019: spalling concentrated on one side of the 145 mm outer race points to misalignment or thrust overload, while uniform roller-end smearing means minimum-load skidding — the two failures demand opposite corrections.", "Match the cage to the duty: the E/CC stamped window-steel cage is the standard for general 23019 service, while the machined brass CA cage is preferred for heavy shock and vibratory applications — never replace a CA row with a CC row in a screen or crusher without re-rating.", "In a classic two-bearing arrangement the 23019 often serves as the non-locating (floating) bearing, taking radial load while the housing bore lets it drift; it can locate axially in both directions, but sustained pure thrust beyond the catalogue limit unloads one roller row." ], "faq": [ { "q": "What are the dimensions of a 23019 spherical roller bearing?", "a": "A 23019 double-row spherical roller bearing per ISO 15 has a 95 mm bore, 145 mm outer diameter and 35 mm width (3.74 × 5.709 × 1.378 in), a 25.0 mm radial section and roughly 1683 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 23019 bore code work?", "a": "The leading 2 in 23019 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 19: 19 × 5 = 95 mm. The 145 mm OD and 35 mm width come from the dimension series (23000), not from the bore code alone." }, { "q": "How much misalignment can a 23019 accommodate?", "a": "Thanks to the sphered outer ring raceway, 23019 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 23019 and 23019K?", "a": "The plain 23019 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 23019 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [ { "equiv_sku": "23019", "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.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "23019K", "23019-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "23020", "brand": "GENERIC-ISO", "series": "23000-series", "type": "spherical_roller", "d_mm": 100, "D_mm": 150, "B_mm": 37, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 1853, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 23000-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 23020 encode the bore: code 20 = 100 mm (code × 5 from 04 upward). The ISO 15 envelope is 150 mm outside diameter and 37 mm width — 3.937 × 5.906 × 1.457 in, with a 25.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "paper machine drying cylinders", "large gear drives and mill pinions", "heavy conveyor drum pulleys", "cement and aggregate processing machinery", "mining and aggregate vibrating screens" ], "failure_modes": [ "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely", "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set" ], "pitfalls": [ "The large 100 mm-bore 23020 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 37 mm double-row assembly cannot be drifted into position without brinelling.", "The 230 series keeps the outside diameter one step below the 222 medium row at the same bore (150 mm against roughly a size larger), which raises shaft support without growing the housing — the flip side is that its 25.0 mm section concentrates load, so seat finish, shoulder squareness and housing stiffness matter more than on a wider 223 row.", "Housing stiffness governs the 23020: with the load carried on a 150 mm OD but only a 25.0 mm radial section feeding it, a soft or ribbed thin housing lets the outer ring flex and the sphered raceway misreads it as misalignment — support the housing boss fully around the 37 mm width.", "Check the shoulder geometry for 23020: a generous fillet on the 100 mm shaft looks strong but stops the 37 mm inner ring seating home; use the catalogue corner-relief radius and provide a withdrawal groove so the 25.0 mm-section outer ring presses flush in the 150 mm housing.", "Large 23020 tapers should be mounted with a hydraulic nut or oil injection: controlled drive-up sets the residual radial clearance on the 37 mm-wide double row, whereas bar-and-spanner force either under-drives (fretting) or over-drives (thermal seizure on first hot run).", "When reusing a sleeve-mounted 23020, inspect the adapter and lock parts together with the bearing: a stretched sleeve or a bent lockwasher tab that let the inner ring creep on the 100 mm journal must be replaced, or the new bearing frets the same seat.", "In a classic two-bearing arrangement the 23020 often serves as the non-locating (floating) bearing, taking radial load while the housing bore lets it drift; it can locate axially in both directions, but sustained pure thrust beyond the catalogue limit unloads one roller row.", "Self-aligning is not a licence to ignore alignment: 23020 accommodates typically around 1° of angular misalignment under normal load (roughly 2° only in favourable, light-load conditions) — the exact figure falls with load, so check the catalogue value rather than designing to the maximum." ], "faq": [ { "q": "What are the dimensions of a 23020 spherical roller bearing?", "a": "A 23020 double-row spherical roller bearing per ISO 15 has a 100 mm bore, 150 mm outer diameter and 37 mm width (3.937 × 5.906 × 1.457 in), a 25.0 mm radial section and roughly 1853 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 23020 bore code work?", "a": "The leading 2 in 23020 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 20: 20 × 5 = 100 mm. The 150 mm OD and 37 mm width come from the dimension series (23000), not from the bore code alone." }, { "q": "How much misalignment can a 23020 accommodate?", "a": "Thanks to the sphered outer ring raceway, 23020 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 23020 and 23020K?", "a": "The plain 23020 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 23020 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [ { "equiv_sku": "23020", "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.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "23020K", "23020-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 } ]