C3072-KM-AOH3072-G bearing: complete specifications & equivalents
The C3072-KM-AOH3072-G is a ISO 15 radial bearing sized 340 x 540 x 134 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 340 mm |
| Outer diameter D | 540 mm |
| Width B | 134 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 2900 kN |
| Basic static load rating C0 | 5000 kN |
| Fatigue load limit Pu | 375 kN |
| Reference speed (thermal) | 900 rpm |
| Limiting speed (mechanical) | 1300 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 125000 g |
| Manufacturer designation | SKF C 3072 KM + AOH 3072 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 | 13.386 in |
|---|---|
| Outer diameter D | 21.26 in |
| Width B | 5.276 in |
| ISO bore code | 72 |
| Radial section height (D−d)/2 | 100 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) | 31 of 49 |
| Bore above smallest carb-withdrawal-sleeve size | 305 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| C3072 | 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 C3072-KM-AOH3072-G model number is decoded
Digit by digit, C3072-KM-AOH3072-G = CARB bearing C 3072 KM (360 mm bore, 540 mm OD, 134 mm width) + withdrawal sleeve AOH 3072 G for the 340 mm cylindrical shaft seat; cage and tolerance letters stay with the bearing half of the designation. Why a withdrawal sleeve at 340 mm shaft: adapter-sleeve locknut forces become impractical on the 360 mm bore; the AOH 3072 G execution lets the fitter generate mounting interference with manageable forces and remove the unit later without damaging the seat. Speed note: for C3072-KM-AOH3072-G the CARB table lists 900 r/min reference and 1,300 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 340 mm seat. Mounting C3072-KM-AOH3072-G at this size: warm the bearing, drive the withdrawal sleeve to its marked travel on the 340 mm seat and verify the residual radial clearance of the 360 mm CARB bearing before the unit cools — the marked travel is the setting record for the next overhaul. Spare-parts note: order C3072-KM-AOH3072-G as the unit; a bare C 3072 KM plus a separately sourced sleeve risks taper mismatch — the catalogue pairing is the guarantee that seat and bore were ground for each other.In SKF catalogue PUB BU/P1 17000, C3072-KM-AOH3072-G appears as bearing C 3072 KM + withdrawal sleeve AOH 3072 G — the large-size execution of the CARB non-locating principle, delivered as one assembly weighing 125 kg.
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
- overheating from a preload set at mounting when sleeve travel overshot the catalogue clearance
- sleeve creep on the shaft seat when the sleeve was not driven to its marked travel or clearance
- 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
- Contamination discipline: the CARB bearing is open (this execution has no seals); flush the housing before mounting C3072-KM-AOH3072-G and maintain the lubricant filtration — hard particles indent the toroidal raceway quickly at heavy load.
- Do not run C3072-KM-AOH3072-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.
- Do not re-use a sleeve that shows taper scuffing: a scratched cone changes the travel-to-clearance relationship of the whole C3072-KM-AOH3072-G unit — replace the sleeve with the bearing.
- The 2900/5000 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 3072 KM + AOH 3072 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 C3072-KM-AOH3072-G?
The unit is CARB bearing C 3072 KM on withdrawal sleeve AOH 3072 G, fitting a 340 mm shaft (13.386 in), housing bore 540 mm, bearing width 134 mm. From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 2900 kN, C0 5000 kN, fatigue load limit Pu 375 kN, combined mass about 125.0 kg. Reference speed 900 r/min, limiting speed 1,300 r/min (bearing values).
Why does C3072-KM-AOH3072-G list a 340 mm shaft size when the bearing bore is 360 mm?
The sleeve takes up the difference: the withdrawal sleeve AOH 3072 G has a tapered outside that engages the bearing's 360 mm tapered bore and a cylindrical bore that seats on the 340 mm shaft. The catalogue's principal dimensions describe the mounted result — shaft seat, housing bore and bearing width — not the bearing bore alone.
Is C3072-KM-AOH3072-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 3072 KM and the sleeve AOH 3072 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 C3072-KM-AOH3072-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 C3072-KM-AOH3072-G set at mounting?
By sleeve travel: the withdrawal sleeve AOH 3072 G is driven or pressed to a marked travel on the 340 mm seat, which sets the interference into the 360 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.