24122-CCK30-W33 bearing: complete specifications & equivalents
The 24122-CCK30-W33 is a ISO 15 radial bearing sized 110 x 180 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 | 110 mm |
| Outer diameter D | 180 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 | 539 kN |
| Basic static load rating C0 | 750 kN |
| Fatigue load limit Pu | 78 kN |
| Reference speed (thermal) | 2000 rpm |
| Limiting speed (mechanical) | 3000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 7700 g |
| Manufacturer designation | SKF 24122 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 & 24100-series range
| Bore d | 4.331 in |
|---|---|
| Outer diameter D | 7.087 in |
| Width B | 2.717 in |
| ISO bore code | 22 |
| Radial section height (D−d)/2 | 35 mm |
| Smallest bore in 24100-series | 100 mm |
| Largest outer diameter in 24100-series | 790 mm |
| Width range across 24100-series | 65–308 mm |
| Bore position in 24100-series (smallest first) | 2 of 25 |
| Bore above smallest 24100-series size | 10 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 24122 | SKF | full Dimensions and internal design equivalent — standard interchange. | Tapered-bore (1:30) sleeve-mounted execution of 24122; identical ISO 15 envelope, fits AH24122 withdrawal sleeve on a 105 mm shaft. |
| C4122-2CS5V-GEM9 | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF CARB toroidal bearing C 4122-2CS5V/GEM9 shares the 110×180×69 mm envelope with ratings within 10 %; it self-aligns but floats axially and cannot locate the shaft — locating/non-locating pair, not a substitute. |
| C4122-V | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF CARB toroidal bearing C 4122 V shares the 110×180×69 mm envelope but catalogue C/C0 differ (670/1000 kN vs 539/750 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 24122-CCK30-W33 model number is decoded
24122-cck30-w33 is the 1:30 tapered-bore execution of the 24100-series spherical roller bearing: the same two barrel-roller rows on a sphered outer raceway as 24122-cc-w33, but the inner-ring bore tapers 1 mm per 30 mm for adapter- or withdrawal-sleeve mounting, as listed by SKF in SKF catalogue PUB BU/P1 17000. Reading the designation: the leading 2 marks a spherical roller bearing, the 41 is the ISO 15 dimension series (dimension series 41 (medium OD, maximum width)), and the last two digits encode the 110 mm bore; the 180 mm OD and 69 mm width follow the ISO 15 general plan. The K30 in the designation marks the 1:30 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. At 2,000 r/min reference speed the 35.0 mm-section 24122-cck30-w33 is governed thermally by lubricant flow through the W33 groove and the two-row roller complement; grease or oil selection should be made against that value, with 3,000 r/min as the mechanical ceiling. At 110 mm bore, dismount after service is by KM locknut reversal or a hydraulic nut on larger sizes; oil-injection grooves on the bigger sleeves let pressurised oil float the 24122-cck30-w33 off the taper without scoring either surface.
Typical equipment & failure modes
Common applications
- heavy conveyor head shafts in mining
- jaw and cone crusher main shafts
- long through-shafts in conveyors, where a sleeve seat avoids a precision journal
- stepped shafts fitted with withdrawal sleeves against a fixed shoulder
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
- hard-particle indentation of the raceway in unfiltered oil or contaminated grease systems
Selection pitfalls — read before you substitute
- Mount the 110 mm bore 24122-cck30-w33 by induction heating (max 120 °C) or oil injection — driving a bearing of this section home through the rollers brinells both raceways, and the damage only speaks up as vibration hours later.
- The 24100-series series at 110 mm bore (180×69 mm) is the heaviest medium-OD execution, built for extreme radial and shock loads at low speed; the 3,000 r/min ceiling is part of the design, not an afterthought — check it before using it in a faster drive.
- The 24122-cck30-w33 and its cylindrical-bore counterpart 24122-cc-w33 share envelope and load ratings (539/750 kN) but are not interchangeable in a housing already fitted for direct shaft mounting — the sleeve changes the assembly stack-up.
- The 24122-cck30-w33 and its cylindrical-bore counterpart 24122-cc-w33 share envelope and load ratings (539/750 kN) but are not interchangeable in a housing already fitted for direct shaft mounting — the sleeve changes the assembly stack-up.
- The 7700 g mass and 69 mm width mean abutment faces must be square to the axis within the bearing's own P0 tolerance; a tilted spacer tilts the outer ring and concentrates load on one roller row of 24122-cck30-w33.
- The 539/750 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24122 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 24122-cck30-w33?
The SKF 24122 CCK30/W33 is a double-row spherical roller bearing with a 1:30 tapered bore, 110 mm nominal bore, 180 mm outer diameter and 69 mm width (4.331 × 7.087 × 2.717 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 539 kN, C0 750 kN, Pu 78 kN, reference speed 2,000 r/min, limiting speed 3,000 r/min, mass about 7700 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft.
What does the K30 suffix mean on 24122-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 24122-cck30-w33?
The sleeve is selected by the actual shaft diameter in millimetres, not only by the 110 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 24122-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 24122-cck30-w33 and 24122-cc-w33?
They share the ISO 15 envelope and the same 539/750 kN ratings, but 24122-cck30-w33 has the 1:30 tapered bore for sleeve mounting on a plain shaft, while 24122-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.