H-315 adapter sleeve: complete specifications & mounting data
The H-315 is an adapter sleeve sized 75 x 98 x 55 mm (tapered bore x sleeve OD x width) for a plain 65 mm metric shaft with M 75x2 thread supplied with the KM 15 lock nut at 780 g per ISO 2982-1. Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 75 mm |
| Outer diameter D | 98 mm |
| Width B | 55 mm |
| Fits shaft diameter | 65 mm |
| Sleeve thread G | M 75x2 |
| Included lock nut | KM 15 |
| Included locking device | MB 15 |
| Associated hydraulic nut | HMV 15 E |
| Material | Carbon_Steel |
| Mass | 780 g |
| Manufacturer designation | H 315 |
| 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 & H3-series range
| Bore d | 2.953 in |
|---|---|
| Outer diameter D | 3.858 in |
| Width B | 2.165 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 11.5 mm |
| Smallest bore in H3-series | 20 mm |
| Largest outer diameter in H3-series | 145 mm |
| Width range across H3-series | 28–77 mm |
| Bore position in H3-series (smallest first) | 12 of 18 |
| Bore above smallest H3-series size | 55 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-315 model number is decoded
the KM 15 lock nut carries size index 15, matching the bore-code family of the 75 mm seat; the nut engages the M 75x2 sleeve thread over its full width the M 75x2 thread spans about 27.5 nut turns across the 55 mm width; each indexed turn is a measurable drive-up step when setting the bearing clearance on the 75 mm seat a width-to-bore ratio of 0.73 gives a 55 mm tapered contact length; the longitudinal slit lets the sleeve close down radially, so the grip on the 65 mm shaft is purely frictional for controlled drive-up the catalogue pairs this seat with the HMV 15 E hydraulic nut (size 15); at 780 g the sleeve and bearing together are too heavy to seat reliably with a hook spanner alone this sleeve mounts a bearing with a 75 mm tapered bore onto a plain 65 mm shaft; the 98 mm outside diameter and 55 mm width define the tapered seat the bearing is driven onto with a 65 mm shaft this size crosses into the range where the associated HMV 15 E hydraulic nut becomes worthwhile for controlled drive-up H 315 is the classic nut-and-washer sleeve — the KM 15 nut drives the bearing up the taper and the MB 15 washer, keyed to the sleeve thread, locks the nut once a tab is bent into place as part of the medium-section H 3 range, the default seat for 13..K and 22..K self-aligning ball bearings and 222..K spherical roller bearings, this size keeps series-standard proportions: 55 mm width on a 75 mm bore, so the bearing lands at the catalogue axial position the KM 15 lock nut and the MB 15 locking washer ship in the kit; controlled drive-up uses the HMV 15 E hydraulic nut rather than a spanner typical applications include woodworking saw and planer spindles, cement plant kiln and mill trunnion drives and marine winch and deck machinery shafts adapter sleeves earn their place wherever a tapered-bore bearing must sit at any axial position on a plain shaft — here a 75 mm bore bearing on a 65 mm shaft in marine winch and deck machinery shafts the sleeve lets the designer use a plain, unstepped shaft and still locate the bearing positively; only one shoulder is needed, opposite the KM 15 nut kit identity for this seat: sleeve H 315 for a 65 mm shaft, 75x98x55 mm taper, M 75x2 thread, KM 15 nut with MB 15 washer, drive-up tool HMV 15 E, catalogue mass 780 g
Typical equipment & failure modes
Common applications
- agricultural machinery axle and PTO shafts
- woodworking saw and planer spindles
- paper machine roll and cylinder journals
- mining crusher and screen exciter shafts
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
- a fretted or corroded shaft seat cannot be rescued by a new sleeve — the thin wall conforms to the damage and clamping force collapses
- neglecting the catalogue axial displacement value leaves the bearing either loose on the taper or preloaded hot in service
- 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
- neglecting the catalogue axial displacement value leaves the bearing either loose on the taper or preloaded hot in service
- over-driving the taper eliminates bearing internal clearance entirely; clearance reduction must be measured with feeler gauges, not estimated from nut torque
Frequently asked questions
What shaft size does the H-315 adapter sleeve fit?
H-315 (H 315) mounts on a plain metric shaft of 65 mm and carries a bearing with a 75 mm tapered (K) bore; sleeve OD is 98 mm and width 55 mm.
What does the H 315 designation mean?
H identifies a standard metric adapter sleeve in the H3 series; the size code encodes the 75 mm tapered bore (bore code × 5 mm).
What is supplied with the H-315?
The kit contains the KM 15 lock nut and MB 15 locking washer. The HMV 15 E hydraulic nut is the associated mounting tool.
How much does the H-315 adapter sleeve weigh?
The listed mass is 780 g for the sleeve assembly at 75x98x55 mm — about 14.2 g per millimetre of sleeve width.
How is the H-315 mounted on the shaft?
Lubricate the M 75x2 thread lightly, screw the KM 15 home, then tighten to the catalogue axial displacement while measuring clearance reduction on the 75 mm bearing, and finally bend the MB 15 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.