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33.338 mm bore bearings

11 models with a 33.338 mm (1.313 in) bore across 1 bearing type, outside diameters from 68.262 to 79.375 mm. Tables are grouped by type; open a model for full specs and equivalents.

11 models 68.262–79.375 mm OD range 2 brands

Tapered Roller Bearings (11)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
M88048-010 M88000 33.338 68.262 22.225 SKF open CN 67.1
M88048-M88010 4t-inch 33.338 68.262 22.225 NTN open CN 62.5
14130-14276 4t-inch 33.338 69.012 19.845 NTN open CN 53.5
14131-14276 14000 33.338 69.012 19.845 SKF open CN 65.8
2585-2523 4t-inch 33.338 69.85 23.812 NTN open CN 76.5
3196-3120 4t-inch 33.338 72.626 30.162 NTN open CN 93.5
HM88547-HM88510 4t-inch 33.338 73.025 29.37 NTN open CN 80
2785-2720 4t-inch 33.338 76.2 23.812 NTN open CN 81
HM89443-HM89410 4t-inch 33.338 76.2 29.37 NTN open CN 86.5
HM89444-HM89410 4t-inch 33.338 76.2 29.37 NTN open CN 86.5
43131-43312 4t-inch 33.338 79.375 25.4 NTN open CN 72.5

Selecting a 33.338 mm bore bearing

The bore fixes the shaft, not the bearing capacity. At 33.338 mm the catalog spans 68.262–79.375 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 33.338 mm bore?

This index lists 11 verified bearing models with a 33.338 mm (1.313 in) bore across 1 bearing type, from 68.262 to 79.375 mm outside diameter. Open any model for the full specification table, seal/clearance options and graded cross references.

How do I choose between the 68.262–79.375 mm OD options for a 33.338 mm shaft?

On a fixed 33.338 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 33.338 mm bearings?

A 33.338 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.