24052-CCK30-W33 bearing: complete specifications & equivalents
The 24052-CCK30-W33 is a ISO 15 radial bearing sized 260 x 400 x 140 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 260 mm |
| Outer diameter D | 400 mm |
| Width B | 140 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 2135 kN |
| Basic static load rating C0 | 3450 kN |
| Fatigue load limit Pu | 285 kN |
| Reference speed (thermal) | 1000 rpm |
| Limiting speed (mechanical) | 1400 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 75000 g |
| Manufacturer designation | SKF 24052 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 | 10.236 in |
|---|---|
| Outer diameter D | 15.748 in |
| Width B | 5.512 in |
| ISO bore code | 52 |
| Radial section height (D−d)/2 | 70 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) | 16 of 27 |
| Bore above smallest 24000-series size | 195 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 24052 | SKF | full Dimensions and internal design equivalent — standard interchange. | Tapered-bore (1:30) sleeve-mounted execution of 24052; identical ISO 15 envelope, fits AOH24052 withdrawal sleeve on a 240 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 24052-CCK30-W33 model number is decoded
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.
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
- 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
Selection pitfalls — read before you substitute
- 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.
Frequently asked questions
What are the dimensions and catalogue data of 24052-cck30-w33?
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.
What does the K30 suffix mean on 24052-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 24052-cck30-w33?
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.
How is the 24052-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 24052-cck30-w33 and 24052-cc-w33?
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.
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.