MPNbase

240 mm bore bearings

8 models with a 240 mm (9.449 in) bore across 2 bearing types, outside diameters from 300 to 500 mm. Tables are grouped by type; open a model for full specs and equivalents.

8 models 300–500 mm OD range 4 brands

Deep Groove Ball Bearings (7)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
61848 61800 240 300 28 SKF open CN 108
61948 61900 240 320 38 SKF open CN 159
61948-ZZ 61900 240 320 38 NSK ZZ CN 170
16048 16000 240 360 37 NTN open CN 197
6048 6000 240 360 56 SKF open CN 255
6248 6200 240 440 72 NSK open CN 375
6348 6300 240 500 95 NSK open CN 515

Spherical Roller Bearings (1)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
23048 23000 240 360 92 GENERIC-ISO open CN —

Selecting a 240 mm bore bearing

The bore fixes the shaft, not the bearing capacity. At 240 mm the catalog spans 300–500 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 m6 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 240 mm bore?

This index lists 8 verified bearing models with a 240 mm (9.449 in) bore across 2 bearing types, from 300 to 500 mm outside diameter. Open any model for the full specification table, seal/clearance options and graded cross references.

How do I choose between the 300–500 mm OD options for a 240 mm shaft?

On a fixed 240 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 240 mm bearings?

A 240 mm bore on a rotating inner ring normally uses a m6 shaft seat with an H7 housing bore (verify against the catalogue for heavy or stationary-ring duty). In the ISO designation system 240 mm is bore code 48 (code × 5), so a 62-series bearing with this bore is the 6248.