KM-H bearing: complete specifications & equivalents
The KM-H is a ISO 15 radial bearing sized 240 x 50 x 154 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 240 mm |
| Outer diameter D | 50 mm |
| Width B | 154 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Operating temperature | -40 to +120 °C |
| Mass | 1322000 g |
| Manufacturer designation | KM H |
| Standard | ISO 15 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018) |
| Last verified | 2026-09-27 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018)) · extracted 2026-09-27
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018)); 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 & 1200-series range
| Bore d | 9.449 in |
|---|---|
| Outer diameter D | 1.969 in |
| Width B | 6.063 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | -95 mm |
| Smallest bore in 1200-series | 6 mm |
| Largest outer diameter in 1200-series | 230 mm |
| Width range across 1200-series | 6–154 mm |
| Bore position in 1200-series (smallest first) | 32 of 32 |
| Bore above smallest 1200-series size | 234 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the KM-H model number is decoded
The KMxx series is a self-aligning ball bearing family. the final digit of KM is the bore in millimetres: KM H fits a 240 mm shaft (direct miniature spelling). Envelope 240×50×154 mm (9.449×1.969×6.063 in) with a -95.0 mm radial section height, C undefined kN, C0 undefined kN and Pu undefined kN. The open KM H carries no shields or seals and relies on application lubrication and external sealing. The suffix identifies the machined brass cage execution. The K suffix marks a 1:12 tapered bore, here supplied with the 322 adapter sleeve for mounting on a cylindrical 240 mm shaft. Limiting speed undefined r/min, catalogue mass 1322000 g.
Typical equipment & failure modes
Common applications
- paper-machine rolls
- marine deck machinery
- crusher feeders
- large industrial gearboxes
Known failure patterns
- contamination wear when the open arrangement is used without adequate external sealing
- lubricant starvation where no regreasing interval is maintained
- adapter-sleeve fretting when the sleeve is not locked against the shaft shoulder
- incorrect sleeve tightening that leaves the tapered bore loose or over-expanded, changing internal clearance
- brinelling from static overload or hammer blows during mounting
- false brinelling from vibration while the shaft stands idle
Selection pitfalls — read before you substitute
- The spherical outer raceway lets KM-H tolerate shaft deflection, but it does not increase thrust capacity — combined loads still need an angular-contact or deep-groove bearing.
- The spherical outer raceway lets KM-H tolerate shaft deflection, but it does not increase thrust capacity — combined loads still need an angular-contact or deep-groove bearing.
- The K suffix means a 1:12 tapered bore: KM-H is not a drop-in for the straight-bore version — it needs a tapered shaft or an 322 adapter sleeve.
- The suffix on KM-H denotes a machined brass cage: the choice for high speeds, marginal lubrication and shock/vibration duty, and temperature-tolerant where polymer cages are not.
- Catalogue ratings for KM-H (C undefined kN, C0 undefined kN) are SKF figures from PUB BU/P1 17000; geometry revisions can change ratings without changing the designation, so keep the catalogue edition with the specification.
- Mount KM-H by heating the inner ring (max 120 °C) on a cylindrical bore — driving it home through the outer ring or balls brinells the raceways.
Frequently asked questions
What are the dimensions of KM-H?
SKF KM H measures 240 mm bore × 50 mm OD × 154 mm width (9.449 × 1.969 × 6.063 in), mass about 1322000 g. It is open, with no shields or seals.
How do I read the KM designation?
Miniature self-aligning bearings print the bore as the final digit, so KM is a 240 mm bearing; the leading digits give the section family.
How heavy is KM-H?
Catalogue mass is 1322000 g for KM H; seal and cage executions of the same envelope differ by a few grams.
What load can KM-H take?
Catalogue values for KM H: dynamic C undefined kN, static C0 undefined kN, fatigue limit Pu undefined kN. Use C in life calculation and C0 for static checks at 240 mm bore.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018) on 2026-09-27. Read our editorial & correction policy.