23040 bearing: complete specifications & equivalents
The 23040 is a ISO 15 radial bearing sized 200 x 310 x 82 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 200 mm |
| Outer diameter D | 310 mm |
| Width B | 82 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 1058 kN |
| Basic static load rating C0 | 1530 kN |
| Fatigue load limit Pu | 137 kN |
| Reference speed (thermal) | 1800 rpm |
| Limiting speed (mechanical) | 2200 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 23500 g |
| Manufacturer designation | SKF 23040 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 & 23000-series range
| Bore d | 7.874 in |
|---|---|
| Outer diameter D | 12.205 in |
| Width B | 3.228 in |
| ISO bore code | 40 |
| Radial section height (D−d)/2 | 55 mm |
| Smallest bore in 23000-series | 70 mm |
| Largest outer diameter in 23000-series | 1580 mm |
| Width range across 23000-series | 27–345 mm |
| Bore position in 23000-series (smallest first) | 17 of 46 |
| Bore above smallest 23000-series size | 130 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 23040-CCK-W33 | SKF | full Dimensions and internal design equivalent — standard interchange. | Tapered-bore (1:12) execution on AH3040 withdrawal sleeve; same ISO 15 envelope, separate order number. |
| C3040 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF CARB toroidal bearing C 3040 shares the 200×310×82 mm envelope but catalogue C/C0 differ (1120/1730 kN vs 1058/1530 kN); it floats axially and cannot locate the shaft — pair, never swap one-for-one. |
| C3040-K | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF CARB toroidal bearing C 3040 K shares the 200×310×82 mm envelope but catalogue C/C0 differ (1120/1730 kN vs 1058/1530 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 23040 model number is decoded
The 23040 CC/W33 is a 200×310×82 mm spherical roller bearing — the dimension series 30 (slim OD, extra-wide) entry for a 200 mm shaft, with two rows of symmetrical barrel rollers for combined radial and axial load. On the SKF nameplate, 23040 follows the ISO 15 convention: 2 for the spherical roller type, 30 for the dimension series 30 (slim OD, extra-wide), final digits 40 for the 200 mm bore. SKF basic executions here are E or CC/W33; specialist suffixes change the bearing materially — VA405 for vibrating screens (C4 clearance, surface-hardened cage), 2CS5 for the sealed variant — and must be quoted in full when ordering. The 55.0 mm radial section height ((310−200)/2) and 23500 g catalogue mass frame a 200 mm bore bearing rated at 1058 kN C — roughly 5.29 kN of dynamic capacity per millimetre of bore before application factors. For relubrication, route the grease duct to the outer-ring W33 groove position where fitted, and purge until fresh grease appears at the seal — the 82 mm width across two roller rows needs the full charge.
Typical equipment & failure modes
Common applications
- wind-turbine main shaft support
- heavy rolling-mill work-roll chocks
- large dredger and marine winch drums
- steel-plant continuous-caster segments
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
- cage pocket wear or fracture from roller skew at insufficient minimum load or rapid acceleration
- surface distress and smearing when the relubrication interval is exceeded — the W33 groove is only effective if grease actually reaches the roller rows
- false brinelling on standby machines exposed to external vibration
Selection pitfalls — read before you substitute
- At 200 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 23000-series series at 200 mm bore (310×82 mm) is the slim-OD envelope: it buys radial space but gives up capacity against a 222-series bearing of the same bore — confirm the L10 margin before downsizing into it.
- The 23500 g mass and 82 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 23040.
- Shaft and housing fillets must clear the bearing chamfer so the 82 mm-wide rings seat square; use an undercut or withdrawal groove rather than an oversized radius that locks on the ring face.
- The 1058/1530 kN ratings are SKF catalogue values for this exact execution (23040 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 23040 (cylindrical bore as listed, tapered-bore 23040 CCK/W33 variant, plus sealed and vibrating-screen options in the same envelope); they are not interchangeable order numbers — quote the full 23040 CC/W33 designation when purchasing.
Frequently asked questions
What are the dimensions and catalogue data of 23040?
The 23040 CC/W33 is a double-row spherical roller bearing with 200 mm bore, 310 mm outer diameter and 82 mm width (7.874 × 12.205 × 3.228 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 1058 kN, C0 1530 kN, fatigue load limit Pu 137 kN, reference speed 1,800 r/min, limiting speed 2,200 r/min, mass about 23500 g. It is an open, self-aligning bearing with two pressed-steel cages with a floating guide ring.
How does the 23040 bore code work?
The last two digits of 23040 are bore code 40, so 40 × 5 = 200 mm bore. The 310 mm OD and 82 mm width come from the ISO 15 dimension-series plan (dimension series 30 (slim OD, extra-wide)), shared with other spherical roller bearings of the same code.
What does the CC/W33 suffix mean on 23040?
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 23040 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 23040K 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 23040 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.