OH-3268-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-3268-H model number is decoded

mass 51,500 g is 151.5 g per mm of bore; the sleeve with its HM 3168 nut and MS 3172-68 clip forms the complete 288 mm-wide mounting assembly 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 the Tr 340x5 thread spans about 57.6 nut turns across the 288 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 51,500 g mass at steel density for the 288 mm-long slit bush the OD-to-bore ratio is 1.29: the 440 mm sleeve OD is only 50 mm of section beyond the 340 mm seat, leaving room for the bearing outer ring without enlarging the housing bore at 320 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 32 range for 232..K spherical roller bearings; the 440 mm OD and 288 mm width follow the ISO 2982-1 boundary plan for that series the delivery includes the HM 3168 lock nut and the MS 3172-68 locking clip, and the HMV 68E 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 340 mm bore bearing on a 320 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 3168 nut ordering digest — OH 3268 H: 320 mm plain shaft to 340 mm tapered bore, sleeve 440 mm OD and 288 mm wide, thread Tr 340x5, supplied with HM 3168 nut with MS 3172-68 clip, drive-up tool HMV 68E; listed mass is 51,500 g

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• exceeding the maximum injection pressure for the 340 mm seat can permanently expand the thin sleeve wall
• mounting with the HMV 68E hydraulic nut but without injecting oil first overloads the Tr 340x5 thread and can seize the nut
• 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