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8 mm bore bearings

41 models with a 8 mm (0.315 in) bore across 4 bearing types, outside diameters from 11 to 28 mm. Tables are grouped by type; open a model for full specs and equivalents.

41 models 11–28 mm OD range 2 brands

Deep Groove Ball Bearings (30)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
W637-8-ZZ 6300 8 12 3.5 SKF ZZ CN 0.312
618-8 61800 8 16 4 SKF open CN 0.819
W618-8 61800 8 16 4 SKF open CN 0.715
628-8-2RS 62800 8 16 5 SKF 2RS CN 1.33
628-8-ZZ 62800 8 16 5 SKF ZZ CN 1.33
W628-8-2RS 62800 8 16 5 SKF 2RS CN 0.715
W628-8-ZZ 62800 8 16 5 SKF ZZ CN 0.715
638-8-ZZ 63800 8 16 6 SKF ZZ CN 1.33
W638-8-ZZ 63800 8 16 6 SKF ZZ CN 0.715
607-8-ZZ 6000 8 19 6 SKF ZZ CN 2.34
619-8 61900 8 19 6 SKF open CN 1.46
619-8-2RS 61900 8 19 6 SKF 2RS CN 1.46
619-8-ZZ 61900 8 19 6 SKF ZZ CN 1.46
W619-8 61900 8 19 6 SKF open CN 1.25
W619-8-2RS 61900 8 19 6 SKF 2RS CN 1.25
W619-8-ZZ 61900 8 19 6 SKF ZZ CN 1.25
608 6000 8 22 7 SKF open CN 3.45
608-2RS 6000 8 22 7 SKF 2RS CN 3.45
608-RSR 6000 8 22 7 SKF RSR CN 3.45
608-ZZ 6000 8 22 7 SKF ZZ CN 3.45
W608 6000 8 22 7 SKF open CN 1.99
W608-2RS 6000 8 22 7 SKF 2RS CN 1.99
W608-ZZ 6000 8 22 7 SKF ZZ CN 1.99
630-8-2RS 6300 8 22 11 SKF 2RS CN 3.45
628 62800 8 24 8 SKF open CN 3.9
628-2RS 62800 8 24 8 SKF 2RS CN 3.9
628-RSR 62800 8 24 8 SKF RSR CN 3.9
628-ZZ 62800 8 24 8 SKF ZZ CN 3.9
W628-ZZ 62800 8 24 8 SKF ZZ CN 2.47
638-RSR 63800 8 28 9 SKF RSR CN 1.33

Needle Roller Bearings (9)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
K8X11X10-TN K 8 11 10 SKF open CN 3.8
K8X11X13-TN K 8 11 13 SKF open CN 5.01
HK0808 HK 8 12 8 SKF open CN 2.7
HK0810 HK 8 12 10 SKF open CN 3.69
HK0810FM HK 8 12 10 NTN open — 3.85
K8X12X10-TN K 8 12 10 SKF open CN 4.84
HK0812-2RS HK 8 12 12 SKF 2RS CN 2.7
NK8-12-TN NK 8 15 12 SKF open CN 3.8
NK8-16-TN NK 8 15 16 SKF open CN 5.01

Needle Roller Thrust Bearings (1)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
AXK0821-TN AXK 8 21 2 SKF open CN 7.2

Self-Aligning Ball Bearings (1)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
108-TN9 1200 8 22 7 SKF open CN 2.65

Exact-dimension interchange groups at 8 mm bore

These d×D×B envelopes at a 8 mm bore are shared by several series or brands — the starting point for a dimensional cross reference:

Selecting a 8 mm bore bearing

The bore fixes the shaft, not the bearing capacity. At 8 mm the catalog spans 11–28 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 8 mm bore?

This index lists 41 verified bearing models with a 8 mm (0.315 in) bore across 4 bearing types, from 11 to 28 mm outside diameter. Open any model for the full specification table, seal/clearance options and graded cross references.

How do I choose between the 11–28 mm OD options for a 8 mm shaft?

On a fixed 8 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 8 mm bearings?

A 8 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.