C39-750-KM-OH39-750-HE bearing: complete specifications & equivalents
The C39-750-KM-OH39-750-HE is a ISO 15 radial bearing sized 710 x 1000 x 185 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 710 mm |
| Outer diameter D | 1000 mm |
| Width B | 185 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 6100 kN |
| Basic static load rating C0 | 13400 kN |
| Fatigue load limit Pu | 815 kN |
| Reference speed (thermal) | 430 rpm |
| Limiting speed (mechanical) | 560 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 590000 g |
| Manufacturer designation | SKF C 39/750 KM + OH 39/750 HE |
| 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-adapter-sleeve range
| Bore d | 27.953 in |
|---|---|
| Outer diameter D | 39.37 in |
| Width B | 7.283 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 145 mm |
| Smallest bore in carb-adapter-sleeve | 25 mm |
| Largest outer diameter in carb-adapter-sleeve | 1580 mm |
| Width range across carb-adapter-sleeve | 20–462 mm |
| Bore position in carb-adapter-sleeve (smallest first) | 46 of 51 |
| Bore above smallest carb-adapter-sleeve size | 685 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| C39 | 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 C39-750-KM-OH39-750-HE model number is decoded
With a combined mass of 590.0 kg over the 710×1000×185 mm principal plan, the unit replaces a machined shoulder seat — the mass difference against the bare bearing is the sleeve steel, priced into the one order number. Mounting C39-750-KM-OH39-750-HE: clean the 710 mm seat, slip on sleeve+bearing as one unit, seat against the housing bore 1000 mm H7, then drive the withdrawal sleeve up its cone in small steps, checking radial internal clearance after each step until the catalogue residual clearance for the K bore is reached. Spare-parts note: order C39-750-KM-OH39-750-HE as the unit; a bare C 39/750 KM plus a separately sourced sleeve risks taper mismatch — the catalogue pairing is the guarantee that seat and bore were ground for each other.Ordering C39-750-KM-OH39-750-HE buys one matched assembly — CARB bearing C 39/750 KM on withdrawal sleeve OH 39/750 HE — rather than a bearing and a sleeve ordered separately for a 710 mm shaft.Digit by digit, C39-750-KM-OH39-750-HE = CARB bearing C 39/750 KM (750 mm bore, 1000 mm OD, 185 mm width) + withdrawal sleeve OH 39/750 HE for the 710 mm cylindrical shaft seat; cage and tolerance letters stay with the bearing half of the designation. The OH 39/750 HE execution mounts the 750 mm K-bore bearing with a controlled squeeze on the 710 mm shaft: the sleeve cone sets both the interference fit on the shaft and the running clearance inside the CARB bearing, so clearance measurement belongs to the mounting procedure, not to fitting feel.
Typical equipment & failure modes
Common applications
- heavy industrial gearbox layshafts used as the non-locating position
- winder and reel drums in paper and steel strip plants
- paper machine drying cylinders and calender rolls with long, thermally expanding shafts
- heavy industrial gearbox layshafts used as the non-locating position
Known failure patterns
- 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
- 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
- raceway spalling of the CARB bearing after the catalogue L10 life under contaminated lubrication
Selection pitfalls — read before you substitute
- Keep the pair complete in stores: storing bearing C 39/750 KM and sleeve OH 39/750 HE on different shelves is how taper-mismatch accidents start — store the unit as received under one part number.
- Contamination discipline: the CARB bearing is open (this execution has no seals); flush the housing before mounting C39-750-KM-OH39-750-HE and maintain the lubricant filtration — hard particles indent the toroidal raceway quickly at heavy load.
- Never set C39-750-KM-OH39-750-HE by locknut torque or "feel": the withdrawal sleeve travel defines the clearance of the 750 mm CARB bearing — measure residual radial clearance during mounting, in steps.
- The 6100/13400 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 39/750 KM + OH 39/750 HE 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 C39-750-KM-OH39-750-HE?
The unit is CARB bearing C 39/750 KM on withdrawal sleeve OH 39/750 HE, fitting a 710 mm shaft (27.953 in), housing bore 1000 mm, bearing width 185 mm. From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 6100 kN, C0 13400 kN, fatigue load limit Pu 815 kN, combined mass about 590.0 kg. Reference speed 430 r/min, limiting speed 560 r/min (bearing values).
Why does C39-750-KM-OH39-750-HE list a 710 mm shaft size when the bearing bore is 750 mm?
The sleeve takes up the difference: the withdrawal sleeve OH 39/750 HE has a tapered outside that engages the bearing's 750 mm tapered bore and a cylindrical bore that seats on the 710 mm shaft. The catalogue's principal dimensions describe the mounted result — shaft seat, housing bore and bearing width — not the bearing bore alone.
Is C39-750-KM-OH39-750-HE 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 39/750 KM and the sleeve OH 39/750 HE 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 C39-750-KM-OH39-750-HE as one catalogue line keeps bearing and sleeve compatible; if ordering separately, quote both full designations including execution letters.
How is the clearance of C39-750-KM-OH39-750-HE set at mounting?
By driving the adapter sleeve up its conical seat: the sleeve expands on the 710 mm shaft and onto the bearing bore, reducing the radial internal clearance. Mount in steps and measure residual clearance until it reaches the catalogue value for the K bore — never set it by nut torque alone.
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.