H-314 adapter sleeve: complete specifications & mounting data
The H-314 is an adapter sleeve sized 70 x 92 x 52 mm (tapered bore x sleeve OD x width) for a plain 60 mm metric shaft with M 70x2 thread supplied with the KM 14 lock nut at 670 g per ISO 2982-1. Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 70 mm |
| Outer diameter D | 92 mm |
| Width B | 52 mm |
| Fits shaft diameter | 60 mm |
| Sleeve thread G | M 70x2 |
| Included lock nut | KM 14 |
| Included locking device | MB 14 |
| Associated hydraulic nut | HMV 14 E |
| Material | Carbon_Steel |
| Mass | 670 g |
| Manufacturer designation | H 314 |
| 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 | 2.756 in |
|---|---|
| Outer diameter D | 3.622 in |
| Width B | 2.047 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 11 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) | 11 of 18 |
| Bore above smallest H3-series size | 50 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-314 model number is decoded
mounting and dismounting stay purely mechanical: the KM 14 nut drives the taper home, and backing the nut off releases the 70 mm seat without oil-injection tooling the 10 mm difference between the 60 mm shaft and the 70 mm nominal seat diameter is bridged by taper contraction as the slit sleeve closes during drive-up, rather than by machining the shaft mass 670 g is 9.6 g per mm of bore; the sleeve with its KM 14 nut and MB 14 washer forms the complete 52 mm-wide mounting assembly the KM 14 lock nut carries size index 14, matching the bore-code family of the 70 mm seat; the nut engages the M 70x2 sleeve thread over its full width for controlled drive-up the catalogue pairs this seat with the HMV 14 E hydraulic nut (size 14); at 670 g the sleeve and bearing together are too heavy to seat reliably with a hook spanner alone at 60 mm shaft this is a mainstream workshop size; the M 70x2 nut can still be driven with a hook spanner alone, without hydraulic assistance H identifies the conventional sleeve used by maintenance crews worldwide: tighten KM 14, verify clearance, lock with one MB 14 tab, and the 60 mm shaft needs no thread or step dimensionally this sleeve belongs to 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; the 92 mm OD and 52 mm width follow the ISO 2982-1 boundary plan for that series hardware on this row: the KM 14 lock nut and the MB 14 locking washer; SKF lists the HMV 14 E hydraulic nut for mounting and dismounting typical applications include food processing line drive shafts, printing press cylinder journals and quarry conveyor head and tail drums adapter sleeves earn their place wherever a tapered-bore bearing must sit at any axial position on a plain shaft — here a 70 mm bore bearing on a 60 mm shaft in quarry conveyor head and tail drums the sleeve lets the designer use a plain, unstepped shaft and still locate the bearing positively; only one shoulder is needed, opposite the KM 14 nut full specification chain for H 314 reads 60 mm shaft / 70 mm seat / 92 mm OD / 52 mm width / M 70x2 / KM 14 nut with MB 14 washer, drive-up tool HMV 14 E / 670 g
Typical equipment & failure modes
Common applications
- electric motor and generator shafts
- food processing line drive shafts
- rolling mill and steel plant roll seats
- textile machine roller shafts
Known failure patterns
- reusing a stretched locking washer tab invites fatigue failure; the bent tab snaps off and the nut backs off undetected
- mounting without a fixed abutment lets the bearing walk axially; the sleeve needs a shaft shoulder opposite the lock nut
- 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
- interchanging nut families (KM vs KMFE, MB vs MS) across executions loses locking reliability even when the thread appears to fit
- neglecting the catalogue axial displacement value leaves the bearing either loose on the taper or preloaded hot in service
Selection pitfalls — read before you substitute
- reusing a stretched locking washer tab invites fatigue failure; the bent tab snaps off and the nut backs off undetected
- 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
- 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 H-314 adapter sleeve fit?
the fit is 60 mm shaft to 70 mm bearing bore via the 1:12 taper; H-314 has a 92 mm outside diameter and a 52 mm overall width.
What does the H 314 designation mean?
the letters give the execution and the digits give the bore: H 314 belongs to H3, fits 70 mm tapered-bore bearings, using a separate lock nut and locking element.
What is supplied with the H-314?
You receive the sleeve plus KM 14 lock nut and MB 14 locking washer. One nut turn on the M 70x2 thread advances 2 mm along the 1:12 taper.
How much does the H-314 adapter sleeve weigh?
670 g for the 52 mm-long slit bush — the equivalent of 9.6 g per millimetre of the 70 mm bore.
How is the H-314 mounted on the shaft?
Mount dry and clean: drive the bearing up the 1:12 taper by turning KM 14 on the M 70x2 thread, using the HMV 14 E hydraulic nut for force, verify clearance with feeler gauges, then apply the MB 14 locking washer.
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.