C3038-K-AH3038-G bearing: complete specifications & equivalents
The C3038-K-AH3038-G is a ISO 15 radial bearing sized 180 x 290 x 75 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 180 mm |
| Outer diameter D | 290 mm |
| Width B | 75 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 930 kN |
| Basic static load rating C0 | 1460 kN |
| Fatigue load limit Pu | 132 kN |
| Reference speed (thermal) | 1800 rpm |
| Limiting speed (mechanical) | 2400 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 20500 g |
| Manufacturer designation | SKF C 3038 K + AH 3038 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 | 7.087 in |
|---|---|
| Outer diameter D | 11.417 in |
| Width B | 2.953 in |
| ISO bore code | 38 |
| Radial section height (D−d)/2 | 55 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) | 22 of 49 |
| Bore above smallest carb-withdrawal-sleeve size | 145 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| C3038 | 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 C3038-K-AH3038-G model number is decoded
In SKF catalogue PUB BU/P1 17000, C3038-K-AH3038-G appears as bearing C 3038 K + withdrawal sleeve AH 3038 G — the large-size execution of the CARB non-locating principle, delivered as one assembly weighing 21 kg.Digit by digit, C3038-K-AH3038-G = CARB bearing C 3038 K (190 mm bore, 290 mm OD, 75 mm width) + withdrawal sleeve AH 3038 G for the 180 mm cylindrical shaft seat; cage and tolerance letters stay with the bearing half of the designation. Withdrawal sleeve AH 3038 G: at this size the sleeve is pulled onto the 180 mm seat (hydraulic assistance is standard) and its taper sets the interference into the 190 mm bearing bore — dismounting uses the sleeve's withdrawal thread, protecting shaft and bearing raceways. Dividing C 930 kN by the 190 mm bore gives 4.89 kN per millimetre of journal — compare this density against neighbouring CARB sizes when the 180 mm seat is fixed and the life requirement is not. Record the sleeve travel at mounting of C3038-K-AH3038-G: the clearance set into the 190 mm bearing today is the reference for the next re-clearance check, and travel data catches seat wear on the 180 mm shaft over the years. Spare-parts note: order C3038-K-AH3038-G as the unit; a bare C 3038 K plus a separately sourced sleeve risks taper mismatch — the catalogue pairing is the guarantee that seat and bore were ground for each other.
Typical equipment & failure modes
Common applications
- vibrating screen exciters fitted with the VE240 tolerance execution
- 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
- vibrating screen exciters fitted with the VE240 tolerance execution
Known failure patterns
- overheating from a preload set at mounting when sleeve travel overshot the catalogue clearance
- misalignment edge loading when the housing bore is out of square with the shaft seat
- 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
- sleeve creep on the shaft seat when the sleeve was not driven to its marked travel or clearance
Selection pitfalls — read before you substitute
- Contamination discipline: the CARB bearing is open (this execution has no seals); flush the housing before mounting C3038-K-AH3038-G and maintain the lubricant filtration — hard particles indent the toroidal raceway quickly at heavy load.
- Do not run C3038-K-AH3038-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.
- Keep the pair complete in stores: storing bearing C 3038 K and sleeve AH 3038 G on different shelves is how taper-mismatch accidents start — store the unit as received under one part number.
- The 930/1460 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 3038 K + AH 3038 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 C3038-K-AH3038-G?
The unit is CARB bearing C 3038 K on withdrawal sleeve AH 3038 G, fitting a 180 mm shaft (7.087 in), housing bore 290 mm, bearing width 75 mm. From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 930 kN, C0 1460 kN, fatigue load limit Pu 132 kN, combined mass about 20.5 kg. Reference speed 1,800 r/min, limiting speed 2,400 r/min (bearing values).
Why does C3038-K-AH3038-G list a 180 mm shaft size when the bearing bore is 190 mm?
The sleeve takes up the difference: the withdrawal sleeve AH 3038 G has a tapered outside that engages the bearing's 190 mm tapered bore and a cylindrical bore that seats on the 180 mm shaft. The catalogue's principal dimensions describe the mounted result — shaft seat, housing bore and bearing width — not the bearing bore alone.
Is C3038-K-AH3038-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 3038 K and the sleeve AH 3038 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 C3038-K-AH3038-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 C3038-K-AH3038-G set at mounting?
By sleeve travel: the withdrawal sleeve AH 3038 G is driven or pressed to a marked travel on the 180 mm seat, which sets the interference into the 190 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.