OH-3084-H 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 OH-3084-H model number is decoded

this sleeve mounts a bearing with a 420 mm tapered bore onto a plain 400 mm shaft; the 490 mm outside diameter and 212 mm width define the tapered seat the bearing is driven onto the OD-to-bore ratio is 1.17: the 490 mm sleeve OD is only 35 mm of section beyond the 420 mm seat, leaving room for the bearing outer ring without enlarging the housing bore the 20 mm difference between the 400 mm shaft and the 420 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 HM 3084 nut on the Tr 420x5 thread advances 5 mm and takes out roughly 0.417 mm of clearance the sleeve wall is 35 mm thick at the small end — 8.3% of the 420 mm bore — thin enough to contract evenly onto the 400 mm shaft while keeping the seat round under the clamping load at 400 mm shaft diameter this sleeve sits in the extra-large band served by oil-injection execution: pressurised oil between the mating surfaces is the only practical way to mount and dismount at this size the OH prefix names the oil-injection execution: ducts and distribution grooves in the tapered surface let pressurised oil part sleeve, shaft and bearing during mounting and dismounting; the trailing H marks the full hydraulic design dimensionally this sleeve belongs to the oil-injection OH 30 range for 230..K spherical roller bearings; the 490 mm OD and 212 mm width follow the ISO 2982-1 boundary plan for that series the delivery includes the HM 3084 lock nut and the MS 3084 locking clip, and the HMV 84E hydraulic nut is the associated drive-up tool typical applications include conveyor pulley and drum bearing seats, mining crusher and screen exciter shafts and industrial fan and blower impeller shafts adapter sleeves earn their place wherever a tapered-bore bearing must sit at any axial position on a plain shaft — here a 420 mm bore bearing on a 400 mm shaft in industrial fan and blower impeller shafts the sleeve lets the designer use a plain, unstepped shaft and still locate the bearing positively; only one shoulder is needed, opposite the HM 3084 nut full specification chain for OH 3084 H reads 400 mm shaft / 420 mm seat / 490 mm OD / 212 mm width / Tr 420x5 / HM 3084 nut with MS 3084 clip, drive-up tool HMV 84E / 47,000 g

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• neglecting the catalogue axial displacement value leaves the bearing either loose on the taper or preloaded hot in service
• 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
• 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