C30-630-KM-AOH30-630 bearing: complete specifications & equivalents
The C30-630-KM-AOH30-630 is a ISO 15 radial bearing sized 600 x 920 x 212 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 600 mm |
| Outer diameter D | 920 mm |
| Width B | 212 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 6800 kN |
| Basic static load rating C0 | 12900 kN |
| Fatigue load limit Pu | 815 kN |
| Reference speed (thermal) | 480 rpm |
| Limiting speed (mechanical) | 670 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 555000 g |
| Manufacturer designation | SKF C 30/630 KM + AOH 30/630 |
| Standard | ISO 15 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 10.2-10.3 CARB on sleeves |
| Last verified | 2026-09-29 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 10.2-10.3 CARB on sleeves) · extracted 2026-09-29
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 10.2-10.3 CARB on sleeves); 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 & carb-withdrawal-sleeve range
| Bore d | 23.622 in |
|---|---|
| Outer diameter D | 36.22 in |
| Width B | 8.346 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 160 mm |
| Smallest bore in carb-withdrawal-sleeve | 35 mm |
| Largest outer diameter in carb-withdrawal-sleeve | 1580 mm |
| Width range across carb-withdrawal-sleeve | 23–462 mm |
| Bore position in carb-withdrawal-sleeve (smallest first) | 42 of 49 |
| Bore above smallest carb-withdrawal-sleeve size | 565 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| C30 | ISO 15 | full Dimensions and internal design equivalent — standard interchange. | ISO 15 boundary-dimension envelope; brand-specific OEM equivalents (NSK/FAG/NTN) pending multi-source data. |
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 C30-630-KM-AOH30-630 model number is decoded
Record the sleeve travel at mounting of C30-630-KM-AOH30-630: the clearance set into the 630 mm bearing today is the reference for the next re-clearance check, and travel data catches seat wear on the 600 mm shaft over the years. The unit's temp range follows the bearing: -40 to +120 °C continuous for the standard execution; cage and sleeve execution letters on C 30/630 KM and AOH 30/630 must be checked against the application temperature before substitution.SKF C 30/630 KM + AOH 30/630 denotes bearing C 30/630 KM mounted on withdrawal sleeve AOH 30/630: a 600 mm shaft seat, 920 mm housing bore, and the sleeve providing the interference a 630 mm tapered bore needs.On the SKF nameplate, C30-630-KM-AOH30-630 reads as two catalogued components: the CARB bearing C 30/630 KM with its 630 mm tapered (K) bore, and the withdrawal sleeve AOH 30/630 whose seat diameter matches that bore — the sleeve number encodes the bearing bore, never the 600 mm shaft size. Why a withdrawal sleeve at 600 mm shaft: adapter-sleeve locknut forces become impractical on the 630 mm bore; the AOH 30/630 execution lets the fitter generate mounting interference with manageable forces and remove the unit later without damaging the seat. Speed note: for C30-630-KM-AOH30-630 the CARB table lists 480 r/min reference and 670 r/min limiting speed the permissible speed of the unit is bounded by the CARB bearing's own catalogue values and by the sleeve-seat interface; sleeve-mounted units run marginally cooler-balanced because the sleeve adds a thermal resistance at the 600 mm seat.
Typical equipment & failure modes
Common applications
- long fan and kiln main shafts where the free end must float without thrust load
- heavy industrial gearbox layshafts used as the non-locating position
- winder and reel drums in paper and steel strip plants
- winder and reel drums in paper and steel strip plants
Known failure patterns
- raceway spalling of the CARB bearing after the catalogue L10 life under contaminated lubrication
- overheating from a preload set at mounting when sleeve travel overshot the catalogue clearance
- overheating from a preload set at mounting when sleeve travel overshot the catalogue clearance
- raceway spalling of the CARB bearing after the catalogue L10 life under contaminated lubrication
- fretting corrosion at the shaft-sleeve interface under vibration with an undersized seat
Selection pitfalls — read before you substitute
- Never set C30-630-KM-AOH30-630 by locknut torque or "feel": the withdrawal sleeve travel defines the clearance of the 630 mm CARB bearing — measure residual radial clearance during mounting, in steps.
- Contamination discipline: the CARB bearing is open (this execution has no seals); flush the housing before mounting C30-630-KM-AOH30-630 and maintain the lubricant filtration — hard particles indent the toroidal raceway quickly at heavy load.
- Do not run C30-630-KM-AOH30-630 as a locating bearing: the CARB raceway is toroidal and the unit is designed to float axially; blocking it against a shoulder preloads the rollers and ends in thermal failure.
- The 6800/12900 kN ratings are SKF catalogue 17000 values for the CARB bearing; SKF can revise internal geometry without changing the order number, so keep the catalogue version (PUB BU/P1 17000/1 EN, 2018) with the specification.
- Quote the full unit designation SKF C 30/630 KM + AOH 30/630 when purchasing — bearing and sleeve execution letters are part of the order number and define the matched taper pair.
Frequently asked questions
What are the dimensions and catalogue data of C30-630-KM-AOH30-630?
The unit is CARB bearing C 30/630 KM on withdrawal sleeve AOH 30/630, fitting a 600 mm shaft (23.622 in), housing bore 920 mm, bearing width 212 mm. From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 6800 kN, C0 12900 kN, fatigue load limit Pu 815 kN, combined mass about 555.0 kg. Reference speed 480 r/min, limiting speed 670 r/min (bearing values).
Why does C30-630-KM-AOH30-630 list a 600 mm shaft size when the bearing bore is 630 mm?
The sleeve takes up the difference: the withdrawal sleeve AOH 30/630 has a tapered outside that engages the bearing's 630 mm tapered bore and a cylindrical bore that seats on the 600 mm shaft. The catalogue's principal dimensions describe the mounted result — shaft seat, housing bore and bearing width — not the bearing bore alone.
Is C30-630-KM-AOH30-630 a locating or non-locating bearing?
Non-locating. The CARB toroidal roller bearing is designed as the free end of the shaft: its raceway geometry tolerates misalignment and allows axial float, while a separate locating bearing (typically a spherical roller or paired taper) takes the thrust. The sleeve does not change this function.
Can I buy the bearing C 30/630 KM and the sleeve AOH 30/630 separately?
The components are catalogued separately, but the taper pair is matched — the sleeve seat and the bearing bore are manufactured to the same execution. Ordering the unit C30-630-KM-AOH30-630 as one catalogue line keeps bearing and sleeve compatible; if ordering separately, quote both full designations including execution letters.
How is the clearance of C30-630-KM-AOH30-630 set at mounting?
By sleeve travel: the withdrawal sleeve AOH 30/630 is driven or pressed to a marked travel on the 600 mm seat, which sets the interference into the 630 mm bore and with it the radial clearance. Record the travel; hydraulic assistance is standard at this size.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 10.2-10.3 CARB on sleeves on 2026-09-29. Read our editorial & correction policy.