H-217 adapter sleeve: complete specifications & mounting data
The H-217 is an adapter sleeve sized 85 x 110 x 50 mm (tapered bore x sleeve OD x width) for a plain 75 mm metric shaft with M 85x2 thread supplied with the KM 17 lock nut at 940 g per ISO 2982-1. Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 85 mm |
| Outer diameter D | 110 mm |
| Width B | 50 mm |
| Fits shaft diameter | 75 mm |
| Sleeve thread G | M 85x2 |
| Included lock nut | KM 17 |
| Included locking device | MB 17 |
| Associated hydraulic nut | HMV 17E |
| Material | Carbon_Steel |
| Mass | 940 g |
| Manufacturer designation | H 217 |
| 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 | 3.346 in |
|---|---|
| Outer diameter D | 4.331 in |
| Width B | 1.969 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 12.5 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) | 13 of 17 |
| Bore above smallest H2-series size | 65 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-217 model number is decoded
the annular envelope between 85 mm bore and 110 mm OD is about 3,829 mm² in cross section, which sets the 940 g mass at steel density for the 50 mm-long slit bush a width-to-bore ratio of 0.59 gives a 50 mm tapered contact length; the longitudinal slit lets the sleeve close down radially, so the grip on the 75 mm shaft is purely frictional the sleeve wall is 12.5 mm thick at the small end — 14.7% of the 85 mm bore — thin enough to contract evenly onto the 75 mm shaft while keeping the seat round under the clamping load the OD-to-bore ratio is 1.29: the 110 mm sleeve OD is only 12.5 mm of section beyond the 85 mm seat, leaving room for the bearing outer ring without enlarging the housing bore mounting and dismounting stay purely mechanical: the KM 17 nut drives the taper home, and backing the nut off releases the 85 mm seat without oil-injection tooling the 75 mm seat is heavy enough that clearance is set by measured drive-up on the M 85x2 thread, yet light enough that a two-person crew can still mount it conventionally the plain H designation denotes the basic sleeve kit; locking relies on the MB 17 washer whose inner tab engages the sleeve thread groove and whose outer tabs bend into the KM 17 nut slots the H2 block is one of the ISO 2982-1 dimension plans; at this seat it means a 110 mm sleeve OD and the M 85x2 thread shared with the adjacent bore steps the catalogue row bundles the KM 17 lock nut and the MB 17 locking washer and references the HMV 17E hydraulic nut for the 85 mm seat typical applications include marine winch and deck machinery shafts, textile machine roller shafts and cement plant kiln and mill trunnion drives adapter sleeves earn their place wherever a tapered-bore bearing must sit at any axial position on a plain shaft — here a 85 mm bore bearing on a 75 mm shaft in cement plant kiln and mill trunnion drives the sleeve lets the designer use a plain, unstepped shaft and still locate the bearing positively; only one shoulder is needed, opposite the KM 17 nut kit identity for this seat: sleeve H 217 for a 75 mm shaft, 85x110x50 mm taper, M 85x2 thread, KM 17 nut with MB 17 washer, drive-up tool HMV 17E, catalogue mass 940 g
Typical equipment & failure modes
Common applications
- industrial fan and blower impeller shafts
- marine winch and deck machinery shafts
- pump shafts in water and process plants
- gearbox input and output shafts
Known failure patterns
- a fretted or corroded shaft seat cannot be rescued by a new sleeve — the thin wall conforms to the damage and clamping force collapses
- the shaft must be within h9 tolerance and free of scoring; an oversize or rough shaft stops the slit sleeve closing down and leaves the grip to the thread alone
- interchanging nut families (KM vs KMFE, MB vs MS) across executions loses locking reliability even when the thread appears to fit
- misaligning the slit with the load zone or belt-pull direction concentrates stress on the split; orient the slit away from the main load
- reusing a stretched locking washer tab invites fatigue failure; the bent tab snaps off and the nut backs off undetected
Selection pitfalls — read before you substitute
- a fretted or corroded shaft seat cannot be rescued by a new sleeve — the thin wall conforms to the damage and clamping force collapses
- interchanging nut families (KM vs KMFE, MB vs MS) across executions loses locking reliability even when the thread appears to fit
- misaligning the slit with the load zone or belt-pull direction concentrates stress on the split; orient the slit away from the main load
Frequently asked questions
What shaft size does the H-217 adapter sleeve fit?
H-217 (H 217) mounts on a plain metric shaft of 75 mm and carries a bearing with a 85 mm tapered (K) bore; sleeve OD is 110 mm and width 50 mm.
What does the H 217 designation mean?
H identifies a standard metric adapter sleeve in the H2 series; the size code encodes the 85 mm tapered bore (bore code × 5 mm).
What is supplied with the H-217?
The kit contains the KM 17 lock nut and MB 17 locking washer. The HMV 17E hydraulic nut is the associated mounting tool.
How much does the H-217 adapter sleeve weigh?
The listed mass is 940 g for the sleeve assembly at 85x110x50 mm — about 18.8 g per millimetre of sleeve width.
How is the H-217 mounted on the shaft?
Lubricate the M 85x2 thread lightly, screw the KM 17 home, then tighten to the catalogue axial displacement while measuring clearance reduction on the 85 mm bearing, and finally bend the MB 17 washer 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.