24038-CCK30-W33 bearing: complete specifications & equivalents
The 24038-CCK30-W33 is a ISO 15 radial bearing sized 190 x 290 x 100 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 190 mm |
| Outer diameter D | 290 mm |
| Width B | 100 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 1164 kN |
| Basic static load rating C0 | 1800 kN |
| Fatigue load limit Pu | 163 kN |
| Reference speed (thermal) | 1400 rpm |
| Limiting speed (mechanical) | 2000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 27500 g |
| Manufacturer designation | SKF 24038 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 | 7.48 in |
|---|---|
| Outer diameter D | 11.417 in |
| Width B | 3.937 in |
| ISO bore code | 38 |
| Radial section height (D−d)/2 | 50 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) | 12 of 27 |
| Bore above smallest 24000-series size | 125 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 24038 | SKF | full Dimensions and internal design equivalent — standard interchange. | Tapered-bore (1:30) sleeve-mounted execution of 24038; identical ISO 15 envelope, fits AH24038 withdrawal sleeve on a 180 mm shaft. |
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 24038-CCK30-W33 model number is decoded
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.
Typical equipment & failure modes
Common 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
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
- electrical pitting on VFD-driven shafts without grounding protection
Selection pitfalls — read before you substitute
- 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.
Frequently asked questions
What are the dimensions and catalogue data of 24038-cck30-w33?
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.
What does the K30 suffix mean on 24038-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 24038-cck30-w33?
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.
How is the 24038-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 24038-cck30-w33 and 24038-cc-w33?
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.
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.