23144 bearing: complete specifications & equivalents
The 23144 is a ISO 15 radial bearing sized 220 x 370 x 120 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 220 mm |
| Outer diameter D | 370 mm |
| Width B | 120 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 1888 kN |
| Basic static load rating C0 | 2750 kN |
| Fatigue load limit Pu | 232 kN |
| Reference speed (thermal) | 1300 rpm |
| Limiting speed (mechanical) | 1700 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 53500 g |
| Manufacturer designation | SKF 23144 CC/W33 |
| Standard | ISO 15 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.1 spherical roller bearings |
| Last verified | 2026-09-26 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.1 spherical roller bearings) · extracted 2026-09-26
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.1 spherical roller bearings); 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 & 23100-series range
| Bore d | 8.661 in |
|---|---|
| Outer diameter D | 14.567 in |
| Width B | 4.724 in |
| ISO bore code | 44 |
| Radial section height (D−d)/2 | 75 mm |
| Smallest bore in 23100-series | 100 mm |
| Largest outer diameter in 23100-series | 790 mm |
| Width range across 23100-series | 52–248 mm |
| Bore position in 23100-series (smallest first) | 12 of 25 |
| Bore above smallest 23100-series size | 120 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 23144 | ISO 15 | full Dimensions and internal design equivalent — standard interchange. | ISO 15 boundary-dimension envelope; D/B cross-verified against Schaeffler HR1 2022; brand-specific OEM equivalents (NSK/FAG/NTN) pending multi-source data. |
| 23144-CCK-W33 | SKF | full Dimensions and internal design equivalent — standard interchange. | Tapered-bore (1:12) execution on AOH3144 withdrawal sleeve; same ISO 15 envelope, separate order number. |
| C3144 | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF CARB toroidal bearing C 3144 shares the 220×370×120 mm envelope with ratings within 10 %; it self-aligns but floats axially and cannot locate the shaft — locating/non-locating pair, not a substitute. |
| C3144-K | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF CARB toroidal bearing C 3144 K shares the 220×370×120 mm envelope with ratings within 10 %; it self-aligns but floats axially and cannot locate the shaft — locating/non-locating pair, not a substitute. |
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 23144 model number is decoded
23144 is a double-row spherical roller bearing in the 23100-series family: two rows of barrel rollers on a common sphered outer raceway, self-aligning under shaft deflection, listed by SKF in SKF catalogue PUB BU/P1 17000. Digit by digit, 23144 reads as bearing type 2 (spherical roller, two barrel-roller rows), dimension series 31, and bore reference 44 resolving to 220 mm; 370 mm OD and 120 mm width are the matching ISO 15 boundary values. In SKF suffix language, E marks the optimized high-capacity design and CC/W33 the pressed-steel-cage execution with relubrication groove; both are open bearings — the sealed variant carries the 2CS5 suffix and the vibrating-screen execution VA405. Speed planning uses two different ceilings: 1,300 r/min thermal reference and 1,700 r/min mechanical limiting speed. Spherical roller bearings are routinely specified with C3 clearance because the tight inner-ring fit and inner/outer temperature gradient eat into the CN running clearance — check the residual clearance after mounting with feeler gauges.
Typical equipment & failure modes
Common applications
- large mining crusher main shafts
- wind-turbine main shaft support
- heavy rolling-mill work-roll chocks
- large dredger and marine winch drums
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
- stamped-steel cage fatigue after long service in high-vibration screening duty without the VA405 execution
- surface distress and smearing when the relubrication interval is exceeded — the W33 groove is only effective if grease actually reaches the roller rows
- seal-lip wear and grease purge loss when an open bearing is run without functioning housing seals
Selection pitfalls — read before you substitute
- At 220 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 23100-series series at 220 mm bore (370×120 mm) is the medium-OD wide envelope for heavy continuous duty; it is wider than a 222 bearing in the same OD class, so housing width and spacer stack must be re-checked before substitution.
- Never use the tapered-bore EK/K variant's drive-up figures on this cylindrical-bore 23144; clearance reduction targets differ, and over-driving a cylindrical bore onto an oversized journal cracks the inner ring.
- Shaft and housing fillets must clear the bearing chamfer so the 120 mm-wide rings seat square; use an undercut or withdrawal groove rather than an oversized radius that locks on the ring face.
- The 1888/2750 kN ratings are SKF catalogue values for this exact execution (23144 CC/W33); SKF can revise internal geometry without changing the order number, so keep the catalogue version (SKF catalogue PUB BU/P1 17000) with the specification and re-verify for critical drives.
- SKF lists several executions of 23144 (cylindrical bore as listed, tapered-bore 23144 CCK/W33 variant, plus sealed and vibrating-screen options in the same envelope); they are not interchangeable order numbers — quote the full 23144 CC/W33 designation when purchasing.
Frequently asked questions
What are the dimensions and catalogue data of 23144?
The 23144 CC/W33 is a double-row spherical roller bearing with 220 mm bore, 370 mm outer diameter and 120 mm width (8.661 × 14.567 × 4.724 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 1888 kN, C0 2750 kN, fatigue load limit Pu 232 kN, reference speed 1,300 r/min, limiting speed 1,700 r/min, mass about 53500 g. It is an open, self-aligning bearing with two pressed-steel cages with a floating guide ring.
How does the 23144 bore code work?
The last two digits of 23144 are bore code 44, so 44 × 5 = 220 mm bore. The 370 mm OD and 120 mm width come from the ISO 15 dimension-series plan (dimension series 31 (medium OD, wide)), shared with other spherical roller bearings of the same code.
What does the CC/W33 suffix mean on 23144?
CC denotes two pressed-steel cages with a floating guide ring between the roller rows, and W33 adds an annular groove plus three lubrication holes in the outer ring for relubrication. CCK/W33 is the 1:12 tapered-bore counterpart.
Can 23144 accommodate misalignment and axial load?
Yes on both counts. The sphered outer raceway lets the bearing self-align ≈ 0.5–2.5° depending on series, absorbing shaft deflection and housing-seat errors. The two barrel-roller rows also carry bidirectional axial load in addition to heavy radial load — this is the key difference from cylindrical roller bearings, which take no axial load.
When should the tapered-bore 23144K variant be used instead?
Choose the K (1:12 tapered bore) variant when the bearing must seat on an adapter or withdrawal sleeve — typical for long shafts, frequent dismounting, or stepped shafts where machining a precision journal is impractical. Sleeve mounting requires measuring clearance reduction or axial drive-up, not nut torque. The cylindrical-bore 23144 listed here seats directly on a machined journal.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.1 spherical roller bearings on 2026-09-26. Read our editorial & correction policy.