OH-3276-H adapter sleeve: complete specifications & mounting data
The OH-3276-H is an adapter sleeve sized 380 x 490 x 310 mm (tapered bore x sleeve OD x width) for a plain 360 mm metric shaft with Tr 380x5 thread supplied with the HM 3176 lock nut at 69,500 g per ISO 2982-1. Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 380 mm |
| Outer diameter D | 490 mm |
| Width B | 310 mm |
| Fits shaft diameter | 360 mm |
| Sleeve thread G | Tr 380x5 |
| Included lock nut | HM 3176 |
| Included locking device | MS 3176 |
| Associated hydraulic nut | HMV 76E |
| Material | Carbon_Steel |
| Mass | 69500 g |
| Manufacturer designation | OH 3276 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 | 14.961 in |
|---|---|
| Outer diameter D | 19.291 in |
| Width B | 12.205 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 55 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) | 5 of 8 |
| Bore above smallest OH32-series size | 80 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-3276-H model number is decoded
a width-to-bore ratio of 0.82 gives a 310 mm tapered contact length; the longitudinal slit lets the sleeve close down radially, so the grip on the 360 mm shaft is purely frictional the sleeve wall is 55 mm thick at the small end — 14.5% of the 380 mm bore — thin enough to contract evenly onto the 360 mm shaft while keeping the seat round under the clamping load mass 69,500 g is 182.9 g per mm of bore; the sleeve with its HM 3176 nut and MS 3176 clip forms the complete 310 mm-wide mounting assembly the 20 mm difference between the 360 mm shaft and the 380 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 380x5 thread spans about 62.0 nut turns across the 310 mm width; each indexed turn is a measurable drive-up step when setting the bearing clearance on the 380 mm seat at 360 mm the 310 mm-wide seat and its HM 3176 nut are crane-handled components; injection pressure and drive-up distance are logged procedures rather than workshop judgement the OH design carries oil ducts and distribution grooves machined into the taper; with the oil film established the sleeve slides with almost no metallic contact, protecting both the 360 mm shaft and the 380 mm bearing bore the OH32 block is one of the ISO 2982-1 dimension plans; at this seat it means a 490 mm sleeve OD and the Tr 380x5 thread shared with the adjacent bore steps the catalogue row bundles the HM 3176 lock nut and the MS 3176 locking clip and references the HMV 76E hydraulic nut for the 380 mm seat typical applications include gearbox input and output shafts, food processing line drive shafts 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 380 mm bore bearing on a 360 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 HM 3176 nut kit identity for this seat: sleeve OH 3276 H for a 360 mm shaft, 380x490x310 mm taper, Tr 380x5 thread, HM 3176 nut with MS 3176 clip, drive-up tool HMV 76E, catalogue mass 69,500 g
Typical equipment & failure modes
Common applications
- paper machine roll and cylinder journals
- gearbox input and output shafts
- mining crusher and screen exciter shafts
- electric motor and generator shafts
Known failure patterns
- injection oil of the wrong viscosity either leaks past the thread flanks or stalls the pump before the separating film builds
- a fretted or corroded shaft seat cannot be rescued by a new sleeve — the thin wall conforms to the damage and clamping force collapses
- misaligning the slit with the load zone or belt-pull direction concentrates stress on the split; orient the slit away from the main load
- exceeding the maximum injection pressure for the 380 mm seat can permanently expand the thin sleeve wall
- mounting with the HMV 76E hydraulic nut but without injecting oil first overloads the Tr 380x5 thread and can seize the nut
Selection pitfalls — read before you substitute
- injection oil of the wrong viscosity either leaks past the thread flanks or stalls the pump before the separating film builds
- misaligning the slit with the load zone or belt-pull direction concentrates stress on the split; orient the slit away from the main load
- interchanging nut families (KM vs KMFE, MB vs MS) across executions loses locking reliability even when the thread appears to fit
Frequently asked questions
What shaft size does the OH-3276-H adapter sleeve fit?
OH-3276-H (OH 3276 H) mounts on a plain metric shaft of 360 mm and carries a bearing with a 380 mm tapered (K) bore; sleeve OD is 490 mm and width 310 mm.
What does the OH 3276 H designation mean?
OH identifies an oil-injection sleeve with ducts for hydraulic mounting in the OH32 series; the size code encodes the 380 mm tapered bore (bore code × 5 mm). The trailing H marks the hydraulic execution.
What is supplied with the OH-3276-H?
The kit contains the HM 3176 lock nut and MS 3176 locking clip. The HMV 76E hydraulic nut is the associated mounting tool.
How much does the OH-3276-H adapter sleeve weigh?
The listed mass is 69,500 g for the sleeve assembly at 380x490x310 mm — about 224.2 g per millimetre of sleeve width.
How is the OH-3276-H mounted on the shaft?
Inject mounting oil through the M 6 duct, drive the sleeve with the HMV 76E hydraulic nut, measure the axial displacement for the 380 mm seat, then lock with the HM 3176 nut and MS 3176 clip.
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.