MPNbase

9 mm bore bearings

34 models with a 9 mm (0.354 in) bore across 3 bearing types, outside diameters from 12 to 26 mm. Tables are grouped by type; open a model for full specs and equivalents.

34 models 12–26 mm OD range 2 brands

Deep Groove Ball Bearings (23)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
618-9 61800 9 17 4 SKF open CN 0.871
W618-9 61800 9 17 4 SKF open CN 0.761
628-9-2RS 62800 9 17 5 SKF 2RS CN 1.43
628-9-ZZ 62800 9 17 5 SKF ZZ CN 1.43
W628-9-2RS 62800 9 17 5 SKF 2RS CN 0.761
W628-9-ZZ 62800 9 17 5 SKF ZZ CN 0.761
619-9 61900 9 20 6 SKF open CN 2.34
619-9-ZZ 61900 9 20 6 SKF ZZ CN 2.34
W619-9 61900 9 20 6 SKF open CN 1.95
W619-9-ZZ 61900 9 20 6 SKF ZZ CN 1.95
609 6000 9 24 7 SKF open CN 3.9
609-2RS 6000 9 24 7 SKF 2RS CN 3.9
609-RSR 6000 9 24 7 SKF RSR CN 3.9
609-ZZ 6000 9 24 7 SKF ZZ CN 3.9
W609 6000 9 24 7 SKF open CN 2.03
W609-2RS 6000 9 24 7 SKF 2RS CN 2.03
W609-ZZ 6000 9 24 7 SKF ZZ CN 2.03
629 6200 9 26 8 SKF open CN 4.75
629-2RS 6200 9 26 8 SKF 2RS CN 4.75
629-RSR 6200 9 26 8 SKF RSR CN 4.75
629-ZZ 6200 9 26 8 SKF ZZ CN 4.75
W629-2RS 6200 9 26 8 SKF 2RS CN 3.97
W629-ZZ 6200 9 26 8 SKF ZZ CN 3.97

Needle Roller Bearings (10)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
K9X12X10-TN K 9 12 10 SKF open CN 4.4
HK0908 HK 9 13 8 SKF open CN 3.52
HK0910 HK 9 13 10 SKF open CN 4.13
HK0910FM HK 9 13 10 NTN open — 4.3
HK0912 HK 9 13 12 SKF open CN 5.12
HK0912F HK 9 13 12 NTN open — 5.4
NK9-12-TN NK 9 16 12 SKF open CN 4.4
NK9-16-TN NK 9 16 16 SKF open CN 5.72
NKI9-12 NKI 9 19 12 SKF open CN 6.71
NKI9-16 NKI 9 19 16 SKF open CN 9.13

Self-Aligning Ball Bearings (1)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
129-TN9 1200 9 26 8 SKF open CN 3.9

Exact-dimension interchange groups at 9 mm bore

These d×D×B envelopes at a 9 mm bore are shared by several series or brands — the starting point for a dimensional cross reference:

Selecting a 9 mm bore bearing

The bore fixes the shaft, not the bearing capacity. At 9 mm the catalog spans 12–26 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 9 mm bore?

This index lists 34 verified bearing models with a 9 mm (0.354 in) bore across 3 bearing types, from 12 to 26 mm outside diameter. Open any model for the full specification table, seal/clearance options and graded cross references.

How do I choose between the 12–26 mm OD options for a 9 mm shaft?

On a fixed 9 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 9 mm bearings?

A 9 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.