23176-CAK-W33 bearing: complete specifications & equivalents
The 23176-CAK-W33 is a ISO 15 radial bearing sized 380 x 620 x 194 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 380 mm |
| Outer diameter D | 620 mm |
| Width B | 194 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass, machined (M1) |
| Basic dynamic load rating C | 4561 kN |
| Basic static load rating C0 | 7100 kN |
| Fatigue load limit Pu | 500 kN |
| Reference speed (thermal) | 560 rpm |
| Limiting speed (mechanical) | 1000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 275000 g |
| Manufacturer designation | SKF 23176 CAK/W33 |
| Standard | ISO 15 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.2 adapter-sleeve executions |
| Last verified | 2026-09-26 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.2 adapter-sleeve executions) · extracted 2026-09-26
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.2 adapter-sleeve executions); SKF® and SKF Explorer® are trademarks of AB SKF, used here for identification only — mpnbase is not an authorized SKF distributor. Boundary dimensions are ISO 15 interchangeable; current production values may differ, verify at skf.com.
Dimensions in inches & 23100-series range
| Bore d | 14.961 in |
|---|---|
| Outer diameter D | 24.409 in |
| Width B | 7.638 in |
| ISO bore code | 76 |
| Radial section height (D−d)/2 | 120 mm |
| Smallest bore in 23100-series | 100 mm |
| Largest outer diameter in 23100-series | 790 mm |
| Width range across 23100-series | 52–248 mm |
| Bore position in 23100-series (smallest first) | 20 of 25 |
| Bore above smallest 23100-series size | 280 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 23176 | SKF | full Dimensions and internal design equivalent — standard interchange. | Tapered-bore (1:12) sleeve-mounted execution of 23176; identical ISO 15 envelope, fits OH3176 adapter sleeve on a 360 mm shaft. |
| C3176-MB | SKF | full Dimensions and internal design equivalent — standard interchange. | 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. |
| C3176-KMB | SKF | full Dimensions and internal design equivalent — standard interchange. | 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. |
Interchange levels: full standard interchange · partial verify parameters · verify manual confirmation required. Links resolve to the equivalent model's specification page where available.
How the 23176-CAK-W33 model number is decoded
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.
Typical equipment & failure modes
Common 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
Known failure patterns
- 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
Selection pitfalls — read before you substitute
- 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.
Frequently asked questions
What are the dimensions and catalogue data of 23176-cak-w33?
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.
What does the K suffix mean on 23176-cak-w33?
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.
Which adapter sleeve fits the 23176-cak-w33?
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.
How is the 23176-cak-w33 driven up and checked?
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.
What is the difference between 23176-cak-w33 and 23176-cak-w33?
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.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.2 adapter-sleeve executions on 2026-09-26. Read our editorial & correction policy.