H-215 adapter sleeve: complete specifications & mounting data
The H-215 is an adapter sleeve sized 75 x 98 x 43 mm (tapered bore x sleeve OD x width) for a plain 65 mm metric shaft with M 75x2 thread supplied with the KM 15 lock nut at 660 g per ISO 2982-1. Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 75 mm |
| Outer diameter D | 98 mm |
| Width B | 43 mm |
| Fits shaft diameter | 65 mm |
| Sleeve thread G | M 75x2 |
| Included lock nut | KM 15 |
| Included locking device | MB 15 |
| Associated hydraulic nut | HMV 15E |
| Material | Carbon_Steel |
| Mass | 660 g |
| Manufacturer designation | H 215 |
| Standard | ISO 2982-1 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 23.1 adapter sleeves for metric shafts |
| Last verified | 2026-09-30 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 23.1 adapter sleeves for metric shafts) · extracted 2026-09-30
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 23.1 adapter sleeves for metric shafts); 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 & H2-series range
| Bore d | 2.953 in |
|---|---|
| Outer diameter D | 3.858 in |
| Width B | 1.693 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 11.5 mm |
| Smallest bore in H2-series | 20 mm |
| Largest outer diameter in H2-series | 145 mm |
| Width range across H2-series | 24–63 mm |
| Bore position in H2-series (smallest first) | 11 of 17 |
| Bore above smallest H2-series size | 55 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| H | ISO 15 | full Dimensions and internal design equivalent — standard interchange. | ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier. |
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 H-215 model number is decoded
the 10 mm difference between the 65 mm shaft and the 75 mm nominal seat diameter is bridged by taper contraction as the slit sleeve closes during drive-up, rather than by machining the shaft the seat taper is 1:12, so each millimetre of axial drive-up removes about 1/12 mm of radial clearance; one turn of the KM 15 nut on the M 75x2 thread advances 2 mm and takes out roughly 0.167 mm of clearance mass 660 g is 8.8 g per mm of bore; the sleeve with its KM 15 nut and MB 15 washer forms the complete 43 mm-wide mounting assembly the M 75x2 thread spans about 21.5 nut turns across the 43 mm width; each indexed turn is a measurable drive-up step when setting the bearing clearance on the 75 mm seat the annular envelope between 75 mm bore and 98 mm OD is about 3,125 mm² in cross section, which sets the 660 g mass at steel density for the 43 mm-long slit bush at 65 mm shaft the sleeve suits mid-size machinery — conveyor pulleys, industrial fans and gearbox output shafts carrying 75 mm bore bearings reading H 215: H marks the standard sleeve execution, the size code encodes the 75 mm tapered bore, and the kit includes the KM 15 nut plus MB 15 washer for positive locking the H2 designation block places it in the light-section H 2 range, commonly paired with 12..K self-aligning ball bearings — every sleeve in the block uses the same bore-code logic, and here the 75 mm tapered bore matches the K-suffix bearing it is ordered for hardware on this row: the KM 15 lock nut and the MB 15 locking washer; SKF lists the HMV 15E hydraulic nut for mounting and dismounting typical applications include industrial fan and blower impeller shafts, gearbox input and output shafts and pump shafts in water and process plants adapter sleeves earn their place wherever a tapered-bore bearing must sit at any axial position on a plain shaft — here a 75 mm bore bearing on a 65 mm shaft in pump shafts in water and process plants the sleeve lets the designer use a plain, unstepped shaft and still locate the bearing positively; only one shoulder is needed, opposite the KM 15 nut ordering digest — H 215: 65 mm plain shaft to 75 mm tapered bore, sleeve 98 mm OD and 43 mm wide, thread M 75x2, supplied with KM 15 nut with MB 15 washer, drive-up tool HMV 15E; listed mass is 660 g
Typical equipment & failure modes
Common applications
- marine winch and deck machinery shafts
- industrial fan and blower impeller shafts
- cement plant kiln and mill trunnion drives
- food processing line drive shafts
Known failure patterns
- reusing a stretched locking washer tab invites fatigue failure; the bent tab snaps off and the nut backs off undetected
- a plain KM nut used without its MB washer has no anti-rotation feature and will unthread under vibration
- driving the bearing via the outer ring during mounting loads the rolling elements; force is always applied through the lock nut on the inner ring
- interchanging nut families (KM vs KMFE, MB vs MS) across executions loses locking reliability even when the thread appears to fit
- neglecting the catalogue axial displacement value leaves the bearing either loose on the taper or preloaded hot in service
Selection pitfalls — read before you substitute
- reusing a stretched locking washer tab invites fatigue failure; the bent tab snaps off and the nut backs off undetected
- driving the bearing via the outer ring during mounting loads the rolling elements; force is always applied through the lock nut on the inner ring
- greasing the tapered seat or shaft destroys the dry friction the joint relies on; a lubricated taper can let the whole sleeve spin under load
Frequently asked questions
What shaft size does the H-215 adapter sleeve fit?
H 215 is listed for a 65 mm plain shaft; its tapered bore accepts 75 mm K-suffix bearings, the sleeve measures 98 mm OD and 43 mm wide.
What does the H 215 designation mean?
H 215: H-series metric adapter sleeve in the H2 dimension plan; the code resolves to a 75 mm tapered bore and a 65 mm shaft.
What is supplied with the H-215?
Supplied hardware is the KM 15 lock nut and MB 15 locking washer. Drive-up is done with the HMV 15E hydraulic nut.
How much does the H-215 adapter sleeve weigh?
It weighs 660 g; the figure is the sleeve-only catalogue mass, with the KM 15 nut counted on the same product row but the hydraulic tool ordered separately.
How is the H-215 mounted on the shaft?
Slide the sleeve onto the 65 mm plain shaft against the abutment, fit the bearing, turn the KM 15 nut with a hook spanner until the measured clearance drop matches the table, and lock it with one MB 15 tab.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 23.1 adapter sleeves for metric shafts on 2026-09-30. Read our editorial & correction policy.