Bearing adapter sleeve size chart: shaft sizes, H numbers and NSK pairings

Find a bearing, adapter or shaft size

Search is immediate and does not change this page URL. A partial number returns candidates with their complete catalogue markings. Combine the text field with shaft diameter and bearing family. Clear the filters to see all 233 listed combinations.

1211K, 22211, 22212 and 22220: which sleeve number?

The base numbers in a search do not establish the bore type or brand suffix. The answers below apply to the exact NSK tapered-bore designations shown. For example, 22211EAKE4 is listed with H311X on a 50 mm shaft; its nominal bearing bore is 55 mm. Do not transfer that result to a cylindrical 22211 or a different brand suffix.

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Shaft diameter is not the bearing bore

Read d1 for the cylindrical shaft under the sleeve, and d for the bearing's nominal bore. The sleeve occupies the difference in this arrangement. Matching the shaft alone is insufficient: the same shaft group can contain different bearing bores and different adapters.

For a 60 mm shaft, the catalogue lists 22213EAKE4 (65 mm nominal bore) with H313X and 22214EAKE4 (70 mm nominal bore) with H314X. This is why a rule such as 'bearing bore minus 5 mm' cannot replace a pairing table.

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How to read B1, d2, B2, B5 and the abutment dimensions

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H311, H312 and H315: preserve the X suffix

The NSK table supplies H311X, H312X and H315X, with sleeve-body designations A311X, A312X and A315X. Its X note specifies a narrow slit and a washer with straight tabs. A search for a bare H number intentionally shows these complete markings; it is not a declaration that every H311 from every source is identical.

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Why one adapter can have different abutment values

Keep the full bearing and adapter as the table key. For example, 2211K and 22211EAKE4 share an 11 mm b minimum in the H311X rows, while 1311K and 21311EAKE4 use 6 mm. Collapsing these rows into one universal H311X record would erase a real assembly distinction.

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A sleeve size chart is not a mounting adjustment

NSK distinguishes mounting a tapered-bore bearing on a tapered shaft from mounting it on a cylindrical shaft with an adapter or withdrawal sleeve. During spherical-roller mounting, clearance reduction and the specified drive-up guidance must be checked. A sleeve length or nominal shaft diameter does not supply either value.

Use the exact bearing and equipment procedure, including residual clearance and retention checks. A self-aligning ball bearing must retain the clearance required for alignment. This reference deliberately supplies no universal nut torque, nut angle or drive-up distance.

Adapter sleeves, plain sleeve bearings and source scope

An adapter in this chart sits between a cylindrical shaft and a tapered-bore rolling bearing. It is not the rolling bearing itself. A plain sleeve bearing is a sliding-contact bearing; a repair sleeve and a fitting-tool sleeve serve different purposes again. Do not use an adapter pairing as a bushing size or a shaft repair specification.

All 233 combinations are from NSK E1103d (2025), Part C, printed pages C348–C355. Every numeric field was compared between coordinate-based and text-layout extraction, then the diagrams and footnotes were visually checked. Published catalogue markings are retained except for removing typography-only spaces inside a designation.

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