MPNbase

12 mm bore bearings

26 models with a 12 mm (0.472 in) bore across 2 bearing types, outside diameters from 21 to 48 mm. Tables are grouped by type; open a model for full specs and equivalents.

26 models 21–48 mm OD range 3 brands

Angular Contact Ball Bearings (3)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
7001 7000 12 28 8 GENERIC-ISO open CN —
7201 7200 12 32 10 GENERIC-ISO open CN —
7301 7300 12 37 12 GENERIC-ISO open CN —

Deep Groove Ball Bearings (23)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
61801 61800 12 21 5 SKF open CN 1.74
61801-2RS 61800 12 21 5 SKF 2RS CN 1.74
61801-RSR 61800 12 21 5 NSK RSR CN 2.11
61801-ZZ 61800 12 21 5 SKF ZZ CN 1.74
61901 61900 12 24 6 SKF open CN 2.91
61901-2RS 61900 12 24 6 SKF 2RS CN 2.91
61901-RSR 61900 12 24 6 NSK RSR CN 3.2
61901-ZZ 61900 12 24 6 SKF ZZ CN 2.91
6001 6000 12 28 8 SKF open CN 5.4
6001-2RS 6000 12 28 8 SKF 2RS CN 5.4
6001-RSR 6000 12 28 8 SKF RSR CN 5.4
6001-ZZ 6000 12 28 8 SKF ZZ CN 5.4
6201 6200 12 32 10 SKF open CN 7.28
6201-2RS 6200 12 32 10 SKF 2RS CN 7.28
6201-RSR 6200 12 32 10 SKF RSR CN 7.28
6201-ZZ 6200 12 32 10 SKF ZZ CN 7.28
6301 6300 12 37 12 SKF open CN 10.1
6301-2RS 6300 12 37 12 SKF 2RS CN 10.1
6301-RSR 6300 12 37 12 SKF RSR CN 10.1
6301-ZZ 6300 12 37 12 SKF ZZ CN 10.1
6401 6400 12 48 14 GENERIC-ISO open CN —
6401-2RS 6400 12 48 14 GENERIC-ISO 2RS CN —
6401-ZZ 6400 12 48 14 GENERIC-ISO ZZ CN —

Exact-dimension interchange groups at 12 mm bore

These d×D×B envelopes at a 12 mm bore are shared by several series or brands — the starting point for a dimensional cross reference:

Selecting a 12 mm bore bearing

The bore fixes the shaft, not the bearing capacity. At 12 mm the catalog spans 21–48 mm outside diameter: the light sections suit compact housings and moderate duty, while the larger ODs use bigger rolling elements and carry substantially more load. Select first by the required dynamic load rating C for the calculated L10 life, then by available radial space.

For a rotating inner ring a j5 shaft seat with an H7 housing is the usual starting point; an interference fit plus thermal growth consumes internal clearance, so C3 is the common industrial default rather than CN. Sealed variants (-2RS, -ZZ) trade a small amount of speed for contamination protection and maintenance-free operation — compare the sealed and open versions of the same envelope before substituting one for the other.

Frequently asked questions

What bearings have a 12 mm bore?

This index lists 26 verified bearing models with a 12 mm (0.472 in) bore across 2 bearing types, from 21 to 48 mm outside diameter. Open any model for the full specification table, seal/clearance options and graded cross references.

How do I choose between the 21–48 mm OD options for a 12 mm shaft?

On a fixed 12 mm bore, a smaller outside diameter means a lighter section for limited housing space and moderate load; a larger OD with a wider ring carries more radial and axial load and lasts longer at the same duty. Compare the C dynamic load rating in each model table, then match seal type, internal clearance (CN/C3/C4) and precision class to the actual mounting and operating temperature.

What shaft fit and bore code apply to 12 mm bearings?

A 12 mm bore on a rotating inner ring normally uses a j5 shaft seat with an H7 housing bore (verify against the catalogue for heavy or stationary-ring duty). Bore diameters below 20 mm follow the 10/12/15/17 mm exception table rather than code × 5.