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630 mm bore bearings

20 models with a 630 mm (24.803 in) bore across 4 bearing types, outside diameters from 780 to 1090 mm. Tables are grouped by type; open a model for full specs and equivalents.

20 models 780–1090 mm OD range 1 brand

CARB Toroidal Roller Bearings (6)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
C39-630-KM C3900 630 850 165 SKF open CN 4650
C39-630-M C3900 630 850 165 SKF open CN 4650
C30-630-KM C3000 630 920 212 SKF open CN 6800
C30-630-M C3000 630 920 212 SKF open CN 6800
C31-630-KMB C3100 630 1030 315 SKF open CN 11800
C31-630-MB C3100 630 1030 315 SKF open CN 11800

Cylindrical Roller Bearings (8)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
NCF18-630-V NCF1800 630 780 69 SKF open CN 1250
NJ18-630-ECMA-HB1 NJ1800 630 780 69 SKF open CN 1100
NCF28-630-V NCF2800 630 780 88 SKF open CN 1940
NU19-630-ECMA-HB1 NU1900 630 850 100 SKF open CN 2240
NCF29-630-V NCF2900 630 850 128 SKF open CN 3740
NJ29-630-ECMA-HB1 NJ2900 630 850 128 SKF open CN 3300
NU29-630-ECMA-HB1 NU2900 630 850 128 SKF open CN 3300
NU20-630-ECMA NU2000 630 920 170 SKF open CN 4730

Deep Groove Ball Bearings (3)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
618-630-MA 61800 630 780 69 SKF open CN 442
619-630 61900 630 850 100 SKF open CN 624
60-630 6000 630 920 128 SKF open CN 819

Spherical Roller Thrust Bearings (3)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
292-630-EM 29200 630 850 132 SKF open CN 4770
293-630-EM 29300 630 950 190 SKF open CN 8450
294-630-EM 29400 630 1090 280 SKF open CN 14400

Exact-dimension interchange groups at 630 mm bore

These d×D×B envelopes at a 630 mm bore are shared by several series or brands — the starting point for a dimensional cross reference:

Selecting a 630 mm bore bearing

The bore fixes the shaft, not the bearing capacity. At 630 mm the catalog spans 780–1090 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 630 mm bore?

This index lists 20 verified bearing models with a 630 mm (24.803 in) bore across 4 bearing types, from 780 to 1090 mm outside diameter. Open any model for the full specification table, seal/clearance options and graded cross references.

How do I choose between the 780–1090 mm OD options for a 630 mm shaft?

On a fixed 630 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 630 mm bearings?

A 630 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 630 mm is bore code 126 (code × 5), so a 62-series bearing with this bore is the 62126.