OH-3168-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-3168-H model number is decoded

the 20 mm difference between the 320 mm shaft and the 340 mm nominal seat diameter is bridged by taper contraction as the slit sleeve closes during drive-up, rather than by machining the shaft oil reaches the interface through the M 6 duct connection into distribution grooves, so the 50,000 g sleeve can be floated off the 320 mm shaft instead of being pressed or pulled this sleeve mounts a bearing with a 340 mm tapered bore onto a plain 320 mm shaft; the 440 mm outside diameter and 254 mm width define the tapered seat the bearing is driven onto the Tr 340x5 thread spans about 50.8 nut turns across the 254 mm width; each indexed turn is a measurable drive-up step when setting the bearing clearance on the 340 mm seat the annular envelope between 340 mm bore and 440 mm OD is about 61,261 mm² in cross section, which sets the 50,000 g mass at steel density for the 254 mm-long slit bush the 320 mm shaft size is the domain of rolling-mill, paper-machine and marine equipment — the oil ducts and the HMV 68E hydraulic nut are essential at this scale OH marks the dismountable execution for the 340 mm bore class: the same ducts that eased mounting reverse the fit at overhaul, avoiding the shaft damage a mechanical puller causes at this size dimensionally this sleeve belongs to the oil-injection OH 31 range for 231..K spherical roller bearings; the 440 mm OD and 254 mm width follow the ISO 2982-1 boundary plan for that series hardware on this row: the HM 3168 lock nut and the MS 3172-68 locking clip; SKF lists the HMV 68E hydraulic nut for mounting and dismounting typical applications include paper machine roll and cylinder journals, printing press cylinder journals and mining crusher and screen exciter shafts adapter sleeves earn their place wherever a tapered-bore bearing must sit at any axial position on a plain shaft — here a 340 mm bore bearing on a 320 mm shaft in mining crusher and screen exciter 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 3168 nut kit identity for this seat: sleeve OH 3168 H for a 320 mm shaft, 340x440x254 mm taper, Tr 340x5 thread, HM 3168 nut with MS 3172-68 clip, drive-up tool HMV 68E, catalogue mass 50,000 g

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• 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
• misaligning the slit with the load zone or belt-pull direction concentrates stress on the split; orient the slit away from the main load
• blocked or contaminated oil ducts fail exactly at peak dismounting pressure; flush and blank the M 6 connection after each use