C39-500-KM-OH39-500-HE bearing: complete specifications & equivalents
The C39-500-KM-OH39-500-HE is a ISO 15 radial bearing sized 470 x 670 x 128 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 470 mm |
| Outer diameter D | 670 mm |
| Width B | 128 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 3150 kN |
| Basic static load rating C0 | 6300 kN |
| Fatigue load limit Pu | 430 kN |
| Reference speed (thermal) | 700 rpm |
| Limiting speed (mechanical) | 950 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 195000 g |
| Manufacturer designation | SKF C 39/500 KM + OH 39/500 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 | 18.504 in |
|---|---|
| Outer diameter D | 26.378 in |
| Width B | 5.039 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 100 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) | 39 of 51 |
| Bore above smallest carb-adapter-sleeve size | 445 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 C39-500-KM-OH39-500-HE model number is decoded
In SKF catalogue PUB BU/P1 17000, C39-500-KM-OH39-500-HE appears as bearing C 39/500 KM + withdrawal sleeve OH 39/500 HE: the non-locating CARB principle combined with a tapered-bore sleeve seat for a 470 mm shaft.Numbering logic: the bearing half C 39/500 KM follows the CARB works numbering (type C, dimension series, 500 mm bore), while OH 39/500 HE identifies the sleeve execution for that bore; the combo C39-500-KM-OH39-500-HE exists in the catalogue so that shaft (470 mm), housing (670 mm) and both components are specified with one order number. OH execution note: OH 39/500 HE is a withdrawal-type sleeve — it gives a more defined interference than a locknut adapter and can be removed without heavy hammer work, which at this bearing size protects the 470 mm shaft seat during overhauls. With a combined mass of 195.0 kg over the 470×670×128 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. Dismounting: release the locknut of OH 39/500 HE, drive the sleeve back off its cone — never hammer the inner ring; the CARB bearing separates from the shaft with the sleeve and stays serviceable if the raceways are sound. Spare-parts note: order C39-500-KM-OH39-500-HE as the unit; a bare C 39/500 KM 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
- 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
- overheating from a preload set at mounting when sleeve travel overshot the catalogue 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
- sleeve creep on the shaft seat when the sleeve was not driven to its marked travel or clearance
- overheating from a preload set at mounting when sleeve travel overshot the catalogue clearance
Selection pitfalls — read before you substitute
- Do not run C39-500-KM-OH39-500-HE 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.
- Sleeve and bearing are a matched taper pair: never fit sleeve OH 39/500 HE onto a different CARB bearing of the same bore size without verifying the execution letters — seat length and taper contact differ.
- Do not re-use a sleeve that shows taper scuffing: a scratched cone changes the travel-to-clearance relationship of the whole C39-500-KM-OH39-500-HE unit — replace the sleeve with the bearing.
- The 3150/6300 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 39/500 KM + OH 39/500 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 C39-500-KM-OH39-500-HE?
The unit is CARB bearing C 39/500 KM on withdrawal sleeve OH 39/500 HE, fitting a 470 mm shaft (18.504 in), housing bore 670 mm, bearing width 128 mm. From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 3150 kN, C0 6300 kN, fatigue load limit Pu 430 kN, combined mass about 195.0 kg. Reference speed 700 r/min, limiting speed 950 r/min (bearing values).
Why does C39-500-KM-OH39-500-HE list a 470 mm shaft size when the bearing bore is 500 mm?
The sleeve takes up the difference: the withdrawal sleeve OH 39/500 HE has a tapered outside that engages the bearing's 500 mm tapered bore and a cylindrical bore that seats on the 470 mm shaft. The catalogue's principal dimensions describe the mounted result — shaft seat, housing bore and bearing width — not the bearing bore alone.
Is C39-500-KM-OH39-500-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 39/500 KM and the sleeve OH 39/500 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 C39-500-KM-OH39-500-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 C39-500-KM-OH39-500-HE set at mounting?
By driving the adapter sleeve up its conical seat: the sleeve expands on the 470 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.