H-207 adapter sleeve: complete specifications & mounting data
The H-207 is an adapter sleeve sized 35 x 52 x 29 mm (tapered bore x sleeve OD x width) for a plain 30 mm metric shaft with M 35x1,5 thread supplied with the KM 7 lock nut at 120 g per ISO 2982-1. Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 35 mm |
| Outer diameter D | 52 mm |
| Width B | 29 mm |
| Fits shaft diameter | 30 mm |
| Sleeve thread G | M 35x1,5 |
| Included lock nut | KM 7 |
| Included locking device | MB 7 |
| Material | Carbon_Steel |
| Mass | 120 g |
| Manufacturer designation | H 207 |
| 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 | 1.378 in |
|---|---|
| Outer diameter D | 2.047 in |
| Width B | 1.142 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 8.5 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) | 4 of 17 |
| Bore above smallest H2-series size | 15 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-207 model number is decoded
the sleeve wall is 8.5 mm thick at the small end — 24.3% of the 35 mm bore — thin enough to contract evenly onto the 30 mm shaft while keeping the seat round under the clamping load the M 35x1,5 thread spans about 19.3 nut turns across the 29 mm width; each indexed turn is a measurable drive-up step when setting the bearing clearance on the 35 mm seat a width-to-bore ratio of 0.83 gives a 29 mm tapered contact length; the longitudinal slit lets the sleeve close down radially, so the grip on the 30 mm shaft is purely frictional mass 120 g is 3.4 g per mm of bore; the sleeve with its KM 7 nut and MB 7 washer forms the complete 29 mm-wide mounting assembly the 5 mm difference between the 30 mm shaft and the 35 mm nominal seat diameter is bridged by taper contraction as the slit sleeve closes during drive-up, rather than by machining the shaft with a 30 mm shaft this sleeve covers the most frequently replaced bearing seats, where using a plain shaft and sleeve avoids the cost of a stepped, ground shaft H 207 is the classic nut-and-washer sleeve — the KM 7 nut drives the bearing up the taper and the MB 7 washer, keyed to the sleeve thread, locks the nut once a tab is bent into place as part of the light-section H 2 range, commonly paired with 12..K self-aligning ball bearings, this size keeps series-standard proportions: 29 mm width on a 35 mm bore, so the bearing lands at the catalogue axial position the KM 7 lock nut and the MB 7 locking washer ship in the kit, and no hydraulic accessory is required at the 30 mm shaft size typical applications include pump shafts in water and process plants, conveyor pulley and drum bearing seats and gearbox input and output shafts adapter sleeves earn their place wherever a tapered-bore bearing must sit at any axial position on a plain shaft — here a 35 mm bore bearing on a 30 mm shaft in gearbox input and output shafts the sleeve lets the designer use a plain, unstepped shaft and still locate the bearing positively; only one shoulder is needed, opposite the KM 7 nut kit identity for this seat: sleeve H 207 for a 30 mm shaft, 35x52x29 mm taper, M 35x1,5 thread, KM 7 nut with MB 7 washer, catalogue mass 120 g
Typical equipment & failure modes
Common applications
- rolling mill and steel plant roll seats
- pump shafts in water and process plants
- textile machine roller shafts
- woodworking saw and planer spindles
Known failure patterns
- over-driving the taper eliminates bearing internal clearance entirely; clearance reduction must be measured with feeler gauges, not estimated from nut torque
- 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
- bending more than one washer tab to force alignment work-hardens both tabs; choose the single closest slot only
- 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
- mounting without a fixed abutment lets the bearing walk axially; the sleeve needs a shaft shoulder opposite the lock nut
Selection pitfalls — read before you substitute
- over-driving the taper eliminates bearing internal clearance entirely; clearance reduction must be measured with feeler gauges, not estimated from nut torque
- bending more than one washer tab to force alignment work-hardens both tabs; choose the single closest slot only
- a fretted or corroded shaft seat cannot be rescued by a new sleeve — the thin wall conforms to the damage and clamping force collapses
Frequently asked questions
What shaft size does the H-207 adapter sleeve fit?
H-207 (H 207) mounts on a plain metric shaft of 30 mm and carries a bearing with a 35 mm tapered (K) bore; sleeve OD is 52 mm and width 29 mm.
What does the H 207 designation mean?
H identifies a standard metric adapter sleeve in the H2 series; the size code encodes the 35 mm tapered bore (bore code × 5 mm).
What is supplied with the H-207?
The kit contains the KM 7 lock nut and MB 7 locking washer. Mounting uses a hook spanner, controlling clearance reduction as the 35 mm bearing climbs the taper.
How much does the H-207 adapter sleeve weigh?
The listed mass is 120 g for the sleeve assembly at 35x52x29 mm — about 4.1 g per millimetre of sleeve width.
How is the H-207 mounted on the shaft?
Lubricate the M 35x1,5 thread lightly, screw the KM 7 home, then tighten to the catalogue axial displacement while measuring clearance reduction on the 35 mm bearing, and finally bend the MB 7 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.