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50 mm bore bearings

40 models with a 50 mm (1.969 in) bore across 5 bearing types, outside diameters from 65 to 130 mm. Tables are grouped by type; open a model for full specs and equivalents.

40 models 65–130 mm OD range 3 brands

Angular Contact Ball Bearings (6)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
71810 71800 50 65 7 GENERIC-ISO open CN —
71910 71900 50 72 12 GENERIC-ISO open CN —
7010 7000 50 80 16 GENERIC-ISO open CN —
7210 7200 50 90 20 GENERIC-ISO open CN —
7310 7300 50 110 27 GENERIC-ISO open CN —
7410 7400 50 130 31 GENERIC-ISO open CN —

Cylindrical Roller Bearings (4)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
NU210 NU200 50 90 20 GENERIC-ISO open CN —
NU2210 NU2200 50 90 23 GENERIC-ISO open CN —
NU310 NU300 50 110 27 GENERIC-ISO open CN —
NU2310 NU2300 50 110 40 GENERIC-ISO open CN —

Deep Groove Ball Bearings (23)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
61810 61800 50 65 7 SKF open CN 6.76
61810-2RS 61800 50 65 7 SKF 2RS CN 6.76
61810-RSR 61800 50 65 7 SKF RSR CN 6.76
61810-ZZ 61800 50 65 7 NSK ZZ CN 7.05
61910 61900 50 72 12 SKF open CN 14.6
61910-2RS 61900 50 72 12 SKF 2RS CN 14.6
61910-RSR 61900 50 72 12 SKF RSR CN 14.6
61910-ZZ 61900 50 72 12 NSK ZZ CN 16
6010 6000 50 80 16 SKF open CN 22.9
6010-2RS 6000 50 80 16 SKF 2RS CN 22.9
6010-RSR 6000 50 80 16 SKF RSR CN 22.9
6010-ZZ 6000 50 80 16 SKF ZZ CN 22.9
6210 6200 50 90 20 SKF open CN 37.1
6210-2RS 6200 50 90 20 SKF 2RS CN 37.1
6210-RSR 6200 50 90 20 NSK RSR CN 38.5
6210-ZZ 6200 50 90 20 SKF ZZ CN 37.1
6310 6300 50 110 27 SKF open CN 65
6310-2RS 6300 50 110 27 SKF 2RS CN 65
6310-RSR 6300 50 110 27 NSK RSR CN 68
6310-ZZ 6300 50 110 27 SKF ZZ CN 65
6410 6400 50 130 31 SKF open CN 87.1
6410-2RS 6400 50 130 31 GENERIC-ISO 2RS CN —
6410-ZZ 6400 50 130 31 GENERIC-ISO ZZ CN —

Spherical Roller Bearings (3)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
22210 22200 50 90 23 GENERIC-ISO open CN —
21310 21300 50 110 27 GENERIC-ISO open CN —
22310 22300 50 110 40 GENERIC-ISO open CN —

Tapered Roller Bearings (4)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
32010 32000 50 80 20 GENERIC-ISO open CN —
30210 30200 50 90 21.75 GENERIC-ISO open CN —
32210 32200 50 90 24.75 GENERIC-ISO open CN —
32310 32300 50 110 42.25 GENERIC-ISO open CN —

Exact-dimension interchange groups at 50 mm bore

These d×D×B envelopes at a 50 mm bore are shared by several series or brands — the starting point for a dimensional cross reference:

Selecting a 50 mm bore bearing

The bore fixes the shaft, not the bearing capacity. At 50 mm the catalog spans 65–130 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 50 mm bore?

This index lists 40 verified bearing models with a 50 mm (1.969 in) bore across 5 bearing types, from 65 to 130 mm outside diameter. Open any model for the full specification table, seal/clearance options and graded cross references.

How do I choose between the 65–130 mm OD options for a 50 mm shaft?

On a fixed 50 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 50 mm bearings?

A 50 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). In the ISO designation system 50 mm is bore code 10 (code × 5), so a 62-series bearing with this bore is the 6210.