C30-530-KM-OH30-530-H bearing: complete specifications & equivalents
The C30-530-KM-OH30-530-H is a ISO 15 radial bearing sized 500 x 780 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 | 500 mm |
| Outer diameter D | 780 mm |
| Width B | 185 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 5100 kN |
| Basic static load rating C0 | 9500 kN |
| Fatigue load limit Pu | 630 kN |
| Reference speed (thermal) | 600 rpm |
| Limiting speed (mechanical) | 800 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 390000 g |
| Manufacturer designation | SKF C 30/530 KM + OH 30/530 H |
| 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 | 19.685 in |
|---|---|
| Outer diameter D | 30.709 in |
| Width B | 7.283 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 140 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) | 40 of 51 |
| Bore above smallest carb-adapter-sleeve size | 475 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| C30 | 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 C30-530-KM-OH30-530-H model number is decoded
OH execution note: OH 30/530 H 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 500 mm shaft seat during overhauls. Fatigue floor: Pu 630 kN governs the adjusted-life calculation at contaminated or partial-film conditions, exactly as for the bare C 30/530 KM bearing — the sleeve execution does not change the L10 arithmetic. Mounting C30-530-KM-OH30-530-H: clean the 500 mm seat, slip on sleeve+bearing as one unit, seat against the housing bore 780 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 C30-530-KM-OH30-530-H as the unit; a bare C 30/530 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 C30-530-KM-OH30-530-H buys one matched assembly — CARB bearing C 30/530 KM on withdrawal sleeve OH 30/530 H — rather than a bearing and a sleeve ordered separately for a 500 mm shaft.Reading the designation: C 30/530 KM is the CARB toroidal roller bearing itself — self-aligning, designed as the non-locating bearing that lets the shaft float axially — and the withdrawal sleeve OH 30/530 H carries the tapered bore seat on a 500 mm cylindrical shaft. The suffix letters on the bearing fix cage and tolerance execution; the sleeve number is keyed to the bearing bore.
Typical equipment & failure modes
Common applications
- winder and reel drums in paper and steel strip plants
- paper machine drying cylinders and calender rolls with long, thermally expanding shafts
- continuous-caster guide rolls and slab-caster segments under heat growth
- long fan and kiln main shafts where the free end must float without thrust load
Known failure patterns
- misalignment edge loading when the housing bore is out of square with the shaft seat
- 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
- overheating from a preload set at mounting when sleeve travel overshot the catalogue clearance
Selection pitfalls — read before you substitute
- Keep the pair complete in stores: storing bearing C 30/530 KM and sleeve OH 30/530 H on different shelves is how taper-mismatch accidents start — store the unit as received under one part number.
- Sleeve and bearing are a matched taper pair: never fit sleeve OH 30/530 H onto a different CARB bearing of the same bore size without verifying the execution letters — seat length and taper contact differ.
- Sleeve and bearing are a matched taper pair: never fit sleeve OH 30/530 H onto a different CARB bearing of the same bore size without verifying the execution letters — seat length and taper contact differ.
- The 5100/9500 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 30/530 KM + OH 30/530 H 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 C30-530-KM-OH30-530-H?
The unit is CARB bearing C 30/530 KM on withdrawal sleeve OH 30/530 H, fitting a 500 mm shaft (19.685 in), housing bore 780 mm, bearing width 185 mm. From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 5100 kN, C0 9500 kN, fatigue load limit Pu 630 kN, combined mass about 390.0 kg. Reference speed 600 r/min, limiting speed 800 r/min (bearing values).
Why does C30-530-KM-OH30-530-H list a 500 mm shaft size when the bearing bore is 530 mm?
The sleeve takes up the difference: the withdrawal sleeve OH 30/530 H has a tapered outside that engages the bearing's 530 mm tapered bore and a cylindrical bore that seats on the 500 mm shaft. The catalogue's principal dimensions describe the mounted result — shaft seat, housing bore and bearing width — not the bearing bore alone.
Is C30-530-KM-OH30-530-H 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 30/530 KM and the sleeve OH 30/530 H 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 C30-530-KM-OH30-530-H as one catalogue line keeps bearing and sleeve compatible; if ordering separately, quote both full designations including execution letters.
How is the clearance of C30-530-KM-OH30-530-H set at mounting?
By driving the adapter sleeve up its conical seat: the sleeve expands on the 500 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.