24028-CCK30-W33 bearing: complete specifications & equivalents
The 24028-CCK30-W33 is a ISO 15 radial bearing sized 140 x 210 x 69 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 140 mm |
| Outer diameter D | 210 mm |
| Width B | 69 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 600 kN |
| Basic static load rating C0 | 900 kN |
| Fatigue load limit Pu | 88 kN |
| Reference speed (thermal) | 2000 rpm |
| Limiting speed (mechanical) | 2800 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 9200 g |
| Manufacturer designation | SKF 24028 CCK30/W33 |
| Standard | ISO 15 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions |
| Last verified | 2026-09-26 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-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. 9.3 withdrawal-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 & 24000-series range
| Bore d | 5.512 in |
|---|---|
| Outer diameter D | 8.268 in |
| Width B | 2.717 in |
| ISO bore code | 28 |
| Radial section height (D−d)/2 | 35 mm |
| Smallest bore in 24000-series | 65 mm |
| Largest outer diameter in 24000-series | 700 mm |
| Width range across 24000-series | 35–218 mm |
| Bore position in 24000-series (smallest first) | 7 of 27 |
| Bore above smallest 24000-series size | 75 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 24028 | SKF | full Dimensions and internal design equivalent — standard interchange. | Tapered-bore (1:30) sleeve-mounted execution of 24028; identical ISO 15 envelope, fits AH24028 withdrawal sleeve on a 135 mm shaft. |
| C4028-V | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | 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. |
| C4028-K30V | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | 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. |
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 24028-CCK30-W33 model number is decoded
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.
Typical equipment & failure modes
Common 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
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
- 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
Selection pitfalls — read before you substitute
- 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.
Frequently asked questions
What are the dimensions and catalogue data of 24028-cck30-w33?
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.
What does the K30 suffix mean on 24028-cck30-w33?
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.
Which adapter sleeve fits the 24028-cck30-w33?
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.
How is the 24028-cck30-w33 driven up and checked?
Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:30 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.
What is the difference between 24028-cck30-w33 and 24028-cc-w33?
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.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-sleeve executions on 2026-09-26. Read our editorial & correction policy.