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28 mm bore bearings

15 models with a 28 mm (1.102 in) bore across 2 bearing types, outside diameters from 35 to 68 mm. Tables are grouped by type; open a model for full specs and equivalents.

15 models 35–68 mm OD range 2 brands

Deep Groove Ball Bearings (2)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
62-28 6200 28 58 16 SKF open CN 16.8
63-28 6300 28 68 18 SKF open CN 25.1

Needle Roller Bearings (13)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
HK2816 HK 28 35 16 SKF open CN 15.7
HK2816CT HK 28 35 16 NTN open — 16.7
HK2820 HK 28 35 20 NTN open — 21.3
HK2820-2RS HK 28 35 20 SKF 2RS CN 15.7
NK28-20 NK 28 37 20 SKF open CN 22
NK28-30 NK 28 37 30 SKF open CN 31.9
RNA49-22 RNA-49 28 39 17 SKF open CN 23.3
RNA69-22 RNA-69 28 39 30 SKF open CN 36.9
NKI28-20-TN NKI 28 42 20 SKF open CN 26.4
NKS28 NKS 28 42 20 SKF open CN 28.6
NKI28-30 NKI 28 42 30 SKF open CN 34.1
NA49-28 NA-49 28 45 17 SKF open CN 25.1
NA69-28 NA-69 28 45 30 SKF open CN 39.6

Selecting a 28 mm bore bearing

The bore fixes the shaft, not the bearing capacity. At 28 mm the catalog spans 35–68 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 k5 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 28 mm bore?

This index lists 15 verified bearing models with a 28 mm (1.102 in) bore across 2 bearing types, from 35 to 68 mm outside diameter. Open any model for the full specification table, seal/clearance options and graded cross references.

How do I choose between the 35–68 mm OD options for a 28 mm shaft?

On a fixed 28 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 28 mm bearings?

A 28 mm bore on a rotating inner ring normally uses a k5 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.