C3088-KMB-AOHX3088-G bearing: complete specifications & equivalents
The C3088-KMB-AOHX3088-G is a ISO 15 radial bearing sized 420 x 650 x 157 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 420 mm |
| Outer diameter D | 650 mm |
| Width B | 157 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 3750 kN |
| Basic static load rating C0 | 6400 kN |
| Fatigue load limit Pu | 450 kN |
| Reference speed (thermal) | 750 rpm |
| Limiting speed (mechanical) | 1000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 215000 g |
| Manufacturer designation | SKF C 3088 KMB + AOHX 3088 G |
| 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 | 16.535 in |
|---|---|
| Outer diameter D | 25.591 in |
| Width B | 6.181 in |
| ISO bore code | 88 |
| Radial section height (D−d)/2 | 115 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) | 35 of 49 |
| Bore above smallest carb-withdrawal-sleeve size | 385 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| C3088 | 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 C3088-KMB-AOHX3088-G model number is decoded
Housing side of C3088-KMB-AOHX3088-G is conventional: a 650 mm H7 bore takes the CARB outer ring, which is free to slide axially in the housing — the toroidal raceway handles the misalignment and the sleeve side handles the location on the 420 mm shaft.The C3088-KMB-AOHX3088-G unit combines the 440 mm-bore CARB toroidal roller bearing C 3088 KMB with withdrawal sleeve AOHX 3088 G, giving controlled mounting interference on a plain 420 mm cylindrical seat.The code breaks into bearing C 3088 KMB and withdrawal sleeve AOHX 3088 G: C marks the CARB type, the digit group the 440 mm bore size, the following letters the cage/tolerance execution, and the sleeve designation its own SKF number — sleeve and bearing are keyed to each other and must be ordered as the pair C3088-KMB-AOHX3088-G. Why a withdrawal sleeve at 420 mm shaft: adapter-sleeve locknut forces become impractical on the 440 mm bore; the AOHX 3088 G execution lets the fitter generate mounting interference with manageable forces and remove the unit later without damaging the seat. Selection arithmetic: the unit carries the ratings of its bearing — C 3750 kN, C0 6400 kN, Pu 450 kN from the CARB table — because the sleeve adds no capacity, only the mounting interface on the 420 mm shaft. Dismounting uses the withdrawal thread on AOHX 3088 G: pull the sleeve back along its cone with the dedicated withdrawal nut or hydraulic tool — the CARB bearing and sleeve come off the 420 mm seat as one piece and the seat stays undamaged.
Typical equipment & failure modes
Common applications
- paper machine drying cylinders and calender rolls with long, thermally expanding shafts
- continuous-caster guide rolls and slab-caster segments under heat growth
- vibrating screen exciters fitted with the VE240 tolerance execution
- heavy industrial gearbox layshafts used as the non-locating position
Known failure patterns
- fretting corrosion at the shaft-sleeve interface under vibration with an undersized seat
- fretting corrosion at the shaft-sleeve interface under vibration with an undersized seat
- fretting corrosion at the shaft-sleeve interface under vibration with an undersized seat
- misalignment edge loading when the housing bore is out of square with the shaft seat
- fretting corrosion at the shaft-sleeve interface under vibration with an undersized seat
Selection pitfalls — read before you substitute
- Do not re-use a sleeve that shows taper scuffing: a scratched cone changes the travel-to-clearance relationship of the whole C3088-KMB-AOHX3088-G unit — replace the sleeve with the bearing.
- Keep the pair complete in stores: storing bearing C 3088 KMB and sleeve AOHX 3088 G on different shelves is how taper-mismatch accidents start — store the unit as received under one part number.
- Do not run C3088-KMB-AOHX3088-G 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 3750/6400 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 3088 KMB + AOHX 3088 G 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 C3088-KMB-AOHX3088-G?
The unit is CARB bearing C 3088 KMB on withdrawal sleeve AOHX 3088 G, fitting a 420 mm shaft (16.535 in), housing bore 650 mm, bearing width 157 mm. From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 3750 kN, C0 6400 kN, fatigue load limit Pu 450 kN, combined mass about 215.0 kg. Reference speed 750 r/min, limiting speed 1,000 r/min (bearing values).
Why does C3088-KMB-AOHX3088-G list a 420 mm shaft size when the bearing bore is 440 mm?
The sleeve takes up the difference: the withdrawal sleeve AOHX 3088 G has a tapered outside that engages the bearing's 440 mm tapered bore and a cylindrical bore that seats on the 420 mm shaft. The catalogue's principal dimensions describe the mounted result — shaft seat, housing bore and bearing width — not the bearing bore alone.
Is C3088-KMB-AOHX3088-G 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 3088 KMB and the sleeve AOHX 3088 G 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 C3088-KMB-AOHX3088-G as one catalogue line keeps bearing and sleeve compatible; if ordering separately, quote both full designations including execution letters.
How is the clearance of C3088-KMB-AOHX3088-G set at mounting?
By sleeve travel: the withdrawal sleeve AOHX 3088 G is driven or pressed to a marked travel on the 420 mm seat, which sets the interference into the 440 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.