OH-3260-H adapter sleeve: complete specifications & mounting data
The OH-3260-H is an adapter sleeve sized 300 x 380 x 240 mm (tapered bore x sleeve OD x width) for a plain 280 mm metric shaft with Tr 300x4 thread supplied with the HM 3160 lock nut at 32,000 g per ISO 2982-1. Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 300 mm |
| Outer diameter D | 380 mm |
| Width B | 240 mm |
| Fits shaft diameter | 280 mm |
| Sleeve thread G | Tr 300x4 |
| Included lock nut | HM 3160 |
| Included locking device | MS 3160 |
| Associated hydraulic nut | HMV 60E |
| Material | Carbon_Steel |
| Mass | 32000 g |
| Manufacturer designation | OH 3260 H |
| Standard | ISO 2982-1 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 23.1 adapter sleeves for metric shafts |
| Last verified | 2026-09-30 |
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.
Dimensions in inches & OH32-series range
| Bore d | 11.811 in |
|---|---|
| Outer diameter D | 14.961 in |
| Width B | 9.449 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 40 mm |
| Smallest bore in OH32-series | 300 mm |
| Largest outer diameter in OH32-series | 560 mm |
| Width range across OH32-series | 240–361 mm |
| Bore position in OH32-series (smallest first) | 1 of 8 |
| Bore above smallest OH32-series size | 0 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| OH | ISO 15 | full Dimensions and internal design equivalent — standard interchange. | ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier. |
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-3260-H model number is decoded
this sleeve mounts a bearing with a 300 mm tapered bore onto a plain 280 mm shaft; the 380 mm outside diameter and 240 mm width define the tapered seat the bearing is driven onto the OD-to-bore ratio is 1.27: the 380 mm sleeve OD is only 40 mm of section beyond the 300 mm seat, leaving room for the bearing outer ring without enlarging the housing bore the 20 mm difference between the 280 mm shaft and the 300 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 3160 nut on the Tr 300x4 thread advances 4 mm and takes out roughly 0.333 mm of clearance the sleeve wall is 40 mm thick at the small end — 13.3% of the 300 mm bore — thin enough to contract evenly onto the 280 mm shaft while keeping the seat round under the clamping load at 280 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 380 mm OD and 240 mm width follow the ISO 2982-1 boundary plan for that series the delivery includes the HM 3160 lock nut and the MS 3160 locking clip, and the HMV 60E hydraulic nut is the associated drive-up tool typical applications include rolling mill and steel plant roll seats, quarry conveyor head and tail drums and textile machine roller shafts adapter sleeves earn their place wherever a tapered-bore bearing must sit at any axial position on a plain shaft — here a 300 mm bore bearing on a 280 mm shaft in textile machine roller 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 3160 nut full specification chain for OH 3260 H reads 280 mm shaft / 300 mm seat / 380 mm OD / 240 mm width / Tr 300x4 / HM 3160 nut with MS 3160 clip, drive-up tool HMV 60E / 32,000 g
Typical equipment & failure modes
Common applications
- mining crusher and screen exciter shafts
- rolling mill and steel plant roll seats
- electric motor and generator shafts
- textile machine roller shafts
Known failure patterns
- blocked or contaminated oil ducts fail exactly at peak dismounting pressure; flush and blank the M 6 connection after each use
- mounting without a fixed abutment lets the bearing walk axially; the sleeve needs a shaft shoulder opposite the lock 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
- injection oil of the wrong viscosity either leaks past the thread flanks or stalls the pump before the separating film builds
- exceeding the maximum injection pressure for the 300 mm seat can permanently expand the thin sleeve wall
Selection pitfalls — read before you substitute
- blocked or contaminated oil ducts fail exactly at peak dismounting pressure; flush and blank the M 6 connection after each use
- 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
- 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
Frequently asked questions
What shaft size does the OH-3260-H adapter sleeve fit?
the fit is 280 mm shaft to 300 mm bearing bore via the 1:12 taper; OH-3260-H has a 380 mm outside diameter and a 240 mm overall width.
What does the OH 3260 H designation mean?
the letters give the execution and the digits give the bore: OH 3260 H belongs to OH32, fits 300 mm tapered-bore bearings, with oil-injection ducts marked by OH/H.
What is supplied with the OH-3260-H?
You receive the sleeve plus HM 3160 lock nut and MS 3160 locking clip. One nut turn on the Tr 300x4 thread advances 4 mm along the 1:12 taper.
How much does the OH-3260-H adapter sleeve weigh?
32,000 g for the 240 mm-long slit bush — the equivalent of 106.7 g per millimetre of the 300 mm bore.
How is the OH-3260-H mounted on the shaft?
Oil injection plus the HMV 60E: the oil film parts the 300 mm seat while the nut provides controlled force; release pressure and secure the HM 3160/MS 3160 lock at the final position.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 23.1 adapter sleeves for metric shafts on 2026-09-30. Read our editorial & correction policy.