H-309 adapter sleeve: complete specifications & mounting data

Specification table

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.

Cross references & equivalents

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-309 model number is decoded

at 230 g drive-up is still a hook-spanner job on the KM 9 nut slots, with feeler gauges checking clearance reduction rather than torque controlling the fit the KM 9 lock nut carries size index 9, matching the bore-code family of the 45 mm seat; the nut engages the M 45x1,5 sleeve thread over its full width this sleeve mounts a bearing with a 45 mm tapered bore onto a plain 40 mm shaft; the 65 mm outside diameter and 39 mm width define the tapered seat the bearing is driven onto 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 9 nut on the M 45x1,5 thread advances 1.5 mm and takes out roughly 0.125 mm of clearance the sleeve wall is 10 mm thick at the small end — 22.2% of the 45 mm bore — thin enough to contract evenly onto the 40 mm shaft while keeping the seat round under the clamping load the 40 mm size is the volume tier of the range; the KM 9 nut and its locking element suit routine field replacement without special tooling the plain H designation denotes the basic sleeve kit; locking relies on the MB 9 washer whose inner tab engages the sleeve thread groove and whose outer tabs bend into the KM 9 nut slots the H3 block is one of the ISO 2982-1 dimension plans; at this seat it means a 65 mm sleeve OD and the M 45x1,5 thread shared with the adjacent bore steps the row bundles the KM 9 lock nut and the MB 9 locking washer; dismounting means backing the nut off and drifting the 39 mm sleeve loose along the taper typical applications include gearbox input and output shafts, paper machine roll and cylinder journals and agricultural machinery axle and PTO shafts adapter sleeves earn their place wherever a tapered-bore bearing must sit at any axial position on a plain shaft — here a 45 mm bore bearing on a 40 mm shaft in agricultural machinery axle and PTO 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 9 nut full specification chain for H 309 reads 40 mm shaft / 45 mm seat / 65 mm OD / 39 mm width / M 45x1,5 / KM 9 nut with MB 9 washer / 230 g

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• 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
• neglecting the catalogue axial displacement value leaves the bearing either loose on the taper or preloaded hot in service
• over-driving the taper eliminates bearing internal clearance entirely; clearance reduction must be measured with feeler gauges, not estimated from nut torque