H-3120-E 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-3120-E model number is decoded

for controlled drive-up the catalogue pairs this seat with the HMV 20 E hydraulic nut (size 20); at 1,800 g the sleeve and bearing together are too heavy to seat reliably with a hook spanner alone the annular envelope between 100 mm bore and 130 mm OD is about 5,419 mm² in cross section, which sets the 1,800 g mass at steel density for the 76 mm-long slit bush this sleeve mounts a bearing with a 100 mm tapered bore onto a plain 90 mm shaft; the 130 mm outside diameter and 76 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 KMFE 20 nut on the M 100x2 thread advances 2 mm and takes out roughly 0.167 mm of clearance the sleeve wall is 15 mm thick at the small end — 15.0% of the 100 mm bore — thin enough to contract evenly onto the 90 mm shaft while keeping the seat round under the clamping load the 90 mm seat is heavy enough that clearance is set by measured drive-up on the M 100x2 thread, yet light enough that a two-person crew can still mount it conventionally the E-suffix sleeve is paired with the KMFE 20 nut — its integral locking screw clamps the nut to the thread, a cleaner solution than a bent washer tab where the 100 mm seat is remounted often the H31 block is one of the ISO 2982-1 dimension plans; at this seat it means a 130 mm sleeve OD and the M 100x2 thread shared with the adjacent bore steps the catalogue row bundles the KMFE 20 lock nut and references the HMV 20 E hydraulic nut for the 100 mm seat 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 100 mm bore bearing on a 90 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 KMFE 20 nut ordering digest — H 3120 E: 90 mm plain shaft to 100 mm tapered bore, sleeve 130 mm OD and 76 mm wide, thread M 100x2, supplied with KMFE 20 self-locking nut, drive-up tool HMV 20 E; listed mass is 1,800 g

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• misaligning the slit with the load zone or belt-pull direction concentrates stress on the split; orient the slit away from the main load
• with no washer as a back-up, a slack locking screw is the only way the KMFE 20 nut can unwind — verify it after the first run
• neglecting the catalogue axial displacement value leaves the bearing either loose on the taper or preloaded hot in service