H-3122 adapter sleeve: complete specifications & mounting data
The H-3122 is an adapter sleeve sized 110 x 145 x 81 mm (tapered bore x sleeve OD x width) for a plain 100 mm metric shaft with M 110x2 thread supplied with the KM 22 lock nut at 2,100 g per ISO 2982-1. Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 110 mm |
| Outer diameter D | 145 mm |
| Width B | 81 mm |
| Fits shaft diameter | 100 mm |
| Sleeve thread G | M 110x2 |
| Included lock nut | KM 22 |
| Included locking device | MB 22 |
| Associated hydraulic nut | HMV 22 E |
| Material | Carbon_Steel |
| Mass | 2100 g |
| Manufacturer designation | H 3122 |
| 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 & H31-series range
| Bore d | 4.331 in |
|---|---|
| Outer diameter D | 5.709 in |
| Width B | 3.189 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 17.5 mm |
| Smallest bore in H31-series | 100 mm |
| Largest outer diameter in H31-series | 250 mm |
| Width range across H31-series | 76–150 mm |
| Bore position in H31-series (smallest first) | 2 of 11 |
| Bore above smallest H31-series size | 10 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| H | 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 H-3122 model number is decoded
the annular envelope between 110 mm bore and 145 mm OD is about 7,010 mm² in cross section, which sets the 2,100 g mass at steel density for the 81 mm-long slit bush a width-to-bore ratio of 0.74 gives a 81 mm tapered contact length; the longitudinal slit lets the sleeve close down radially, so the grip on the 100 mm shaft is purely frictional the OD-to-bore ratio is 1.32: the 145 mm sleeve OD is only 17.5 mm of section beyond the 110 mm seat, leaving room for the bearing outer ring without enlarging the housing bore mounting and dismounting stay purely mechanical: the KM 22 nut drives the taper home, and backing the nut off releases the 110 mm seat without oil-injection tooling the KM 22 lock nut carries size index 22, matching the bore-code family of the 110 mm seat; the nut engages the M 110x2 sleeve thread over its full width the 100 mm seat is heavy enough that clearance is set by measured drive-up on the M 110x2 thread, yet light enough that a two-person crew can still mount it conventionally the plain H designation denotes the basic sleeve kit; locking relies on the MB 22 washer whose inner tab engages the sleeve thread groove and whose outer tabs bend into the KM 22 nut slots the H31 block is one of the ISO 2982-1 dimension plans; at this seat it means a 145 mm sleeve OD and the M 110x2 thread shared with the adjacent bore steps the catalogue row bundles the KM 22 lock nut and the MB 22 locking washer and references the HMV 22 E hydraulic nut for the 110 mm seat typical applications include marine winch and deck machinery shafts, industrial fan and blower impeller shafts and cement plant kiln and mill trunnion drives adapter sleeves earn their place wherever a tapered-bore bearing must sit at any axial position on a plain shaft — here a 110 mm bore bearing on a 100 mm shaft in cement plant kiln and mill trunnion drives the sleeve lets the designer use a plain, unstepped shaft and still locate the bearing positively; only one shoulder is needed, opposite the KM 22 nut kit identity for this seat: sleeve H 3122 for a 100 mm shaft, 110x145x81 mm taper, M 110x2 thread, KM 22 nut with MB 22 washer, drive-up tool HMV 22 E, catalogue mass 2,100 g
Typical equipment & failure modes
Common applications
- textile machine roller shafts
- marine winch and deck machinery shafts
- woodworking saw and planer spindles
- cement plant kiln and mill trunnion drives
Known failure patterns
- misaligning the slit with the load zone or belt-pull direction concentrates stress on the split; orient the slit away from the main load
- mounting without a fixed abutment lets the bearing walk axially; the sleeve needs a shaft shoulder opposite the lock nut
- hammering the sleeve directly instead of driving through the nut damages the 81 mm slit edge
- reusing a stretched locking washer tab invites fatigue failure; the bent tab snaps off and the nut backs off undetected
- interchanging nut families (KM vs KMFE, MB vs MS) across executions loses locking reliability even when the thread appears to fit
Selection pitfalls — read before you substitute
- misaligning the slit with the load zone or belt-pull direction concentrates stress on the split; orient the slit away from the main load
- hammering the sleeve directly instead of driving through the nut damages the 81 mm slit edge
- 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
Frequently asked questions
What shaft size does the H-3122 adapter sleeve fit?
H-3122 (H 3122) mounts on a plain metric shaft of 100 mm and carries a bearing with a 110 mm tapered (K) bore; sleeve OD is 145 mm and width 81 mm.
What does the H 3122 designation mean?
H identifies a standard metric adapter sleeve in the H31 series; the size code encodes the 110 mm tapered bore (bore code × 5 mm).
What is supplied with the H-3122?
The kit contains the KM 22 lock nut and MB 22 locking washer. The HMV 22 E hydraulic nut is the associated mounting tool.
How much does the H-3122 adapter sleeve weigh?
The listed mass is 2,100 g for the sleeve assembly at 110x145x81 mm — about 25.9 g per millimetre of sleeve width.
How is the H-3122 mounted on the shaft?
Lubricate the M 110x2 thread lightly, screw the KM 22 home, then tighten to the catalogue axial displacement while measuring clearance reduction on the 110 mm bearing, and finally bend the MB 22 washer tab.
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.