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32 mm bore bearings

13 models with a 32 mm (1.260 in) bore across 1 bearing type, outside diameters from 37 to 52 mm. Tables are grouped by type; open a model for full specs and equivalents.

13 models 37–52 mm OD range 1 brand

Needle Roller Bearings (13)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
K32X37X13 K 32 37 13 SKF open CN 14.7
K32X37X17 K 32 37 17 SKF open CN 19
K32X38X20 K 32 38 20 SKF open CN 25.1
K32X40X25 K 32 40 25 SKF open CN 35.8
NK32-20-TN NK 32 42 20 SKF open CN 26.4
NK32-30 NK 32 42 30 SKF open CN 34.1
RNA49-28 RNA-49 32 45 17 SKF open CN 25.1
RNA69-28 RNA-69 32 45 30 SKF open CN 39.6
NKI32-20 NKI 32 47 20 SKF open CN 25.1
NKS32 NKS 32 47 22 SKF open CN 34.1
NKI32-30 NKI 32 47 30 SKF open CN 36.9
NA49-32 NA-49 32 52 20 SKF open CN 30.8
NA69-32 NA-69 32 52 36 SKF open CN 47.3

Selecting a 32 mm bore bearing

The bore fixes the shaft, not the bearing capacity. At 32 mm the catalog spans 37–52 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 32 mm bore?

This index lists 13 verified bearing models with a 32 mm (1.260 in) bore across 1 bearing type, from 37 to 52 mm outside diameter. Open any model for the full specification table, seal/clearance options and graded cross references.

How do I choose between the 37–52 mm OD options for a 32 mm shaft?

On a fixed 32 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 32 mm bearings?

A 32 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.