23030-CCK-W33 bearing: complete specifications & equivalents
The 23030-CCK-W33 is a ISO 15 radial bearing sized 150 x 225 x 56 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 150 mm |
| Outer diameter D | 225 mm |
| Width B | 56 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 531 kN |
| Basic static load rating C0 | 750 kN |
| Fatigue load limit Pu | 73.5 kN |
| Reference speed (thermal) | 2400 rpm |
| Limiting speed (mechanical) | 3200 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 11000 g |
| Manufacturer designation | SKF 23030 CCK/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 & 23000-series range
| Bore d | 5.906 in |
|---|---|
| Outer diameter D | 8.858 in |
| Width B | 2.205 in |
| ISO bore code | 30 |
| Radial section height (D−d)/2 | 37.5 mm |
| Smallest bore in 23000-series | 70 mm |
| Largest outer diameter in 23000-series | 480 mm |
| Width range across 23000-series | 27–121 mm |
| Bore position in 23000-series (smallest first) | 12 of 23 |
| Bore above smallest 23000-series size | 80 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 23030 | SKF | full Dimensions and internal design equivalent — standard interchange. | Tapered-bore (1:12) sleeve-mounted execution of 23030; identical ISO 15 envelope, fits H3030 adapter sleeve on a 110 mm shaft. |
| C3030-MB | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF CARB toroidal bearing C 3030 MB shares the 150×225×56 mm envelope but catalogue C/C0 differ (540/850 kN vs 531/750 kN); it floats axially and cannot locate the shaft — pair, never swap one-for-one. |
| C3030-V | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF CARB toroidal bearing C 3030 V shares the 150×225×56 mm envelope but catalogue C/C0 differ (585/960 kN vs 531/750 kN); it floats axially and cannot locate the shaft — pair, never swap one-for-one. |
| C3030-KV | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF CARB toroidal bearing C 3030 KV shares the 150×225×56 mm envelope but catalogue C/C0 differ (585/960 kN vs 531/750 kN); it floats axially and cannot locate the shaft — pair, never swap one-for-one. |
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 23030-CCK-W33 model number is decoded
In SKF catalogue PUB BU/P1 17000, 23030-cck-w33 denotes the tapered-bore version (K suffix, taper 1:12) of the 23000-series spherical roller bearing: dimensioned 150×225×56 mm, it seats on an adapter or withdrawal sleeve rather than directly on a machined journal. On the SKF nameplate, 23030-cck-w33 follows the ISO 15 convention: 2 for the spherical roller type, 30 for the dimension series 30 (slim OD, extra-wide), final digits 30 for the 150 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. Selection arithmetic: the C0/C ratio is about 1.41 (static 750 kN against dynamic 531 kN), typical of a spherical roller sized for heavy combined loads, and the 73.5 kN fatigue load limit Pu is the equivalent-load floor used in the life calculation. Over-driving the 23030-cck-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.
Typical equipment & failure modes
Common 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
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
- 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
Selection pitfalls — read before you substitute
- 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 23000-series series at 150 mm bore (225×56 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 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 23030-cck-w33 with different sleeves.
- 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 23030-cck-w33 with different sleeves.
- The 23030-cck-w33 shares its ISO 15 envelope across brands, but internal geometry differs — SKF load ratings in this row are 531/750 kN; another maker's same-size bearing may rate higher or lower, so do not interchange on envelope alone.
- The 531/750 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 23030 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.
Frequently asked questions
What are the dimensions and catalogue data of 23030-cck-w33?
The SKF 23030 CCK/W33 is a double-row spherical roller bearing with a 1:12 tapered bore, 150 mm nominal bore, 225 mm outer diameter and 56 mm width (5.906 × 8.858 × 2.205 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 531 kN, C0 750 kN, Pu 73.5 kN, reference speed 2,400 r/min, limiting speed 3,200 r/min, mass about 11000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft.
What does the K suffix mean on 23030-cck-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 23030-cck-w33?
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.
How is the 23030-cck-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 23030-cck-w33 and 23030-cc-w33?
They share the ISO 15 envelope and the same 531/750 kN ratings, but 23030-cck-w33 has the 1:12 tapered bore for sleeve mounting on a plain shaft, while 23030-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.
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.