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850 mm bore bearings

12 models with a 850 mm (33.465 in) bore across 4 bearing types, outside diameters from 1030 to 1440 mm. Tables are grouped by type; open a model for full specs and equivalents.

12 models 1030–1440 mm OD range 1 brand

CARB Toroidal Roller Bearings (4)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
C39-850-KM C3900 850 1120 200 SKF open CN 7350
C39-850-M C3900 850 1120 200 SKF open CN 7350
C30-850-KMB C3000 850 1220 272 SKF open CN 11600
C30-850-MB C3000 850 1220 272 SKF open CN 11600

Cylindrical Roller Bearings (5)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
NCF18-850-V NCF1800 850 1030 82 SKF open CN 2050
NCF28-850-V NCF2800 850 1030 106 SKF open CN 2860
NU28-850-MA NU2800 850 1030 106 SKF open CN 2120
NCF29-850-V NCF2900 850 1120 155 SKF open CN 5230
NU20-850-ECMA NU2000 850 1220 212 SKF open CN 8420

Deep Groove Ball Bearings (2)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
618-850-MA 61800 850 1030 82 SKF open CN 559
619-850-MA 61900 850 1120 118 SKF open CN 852

Spherical Roller Thrust Bearings (1)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
294-850-EF 29400 850 1440 354 SKF open CN 23900

Selecting a 850 mm bore bearing

The bore fixes the shaft, not the bearing capacity. At 850 mm the catalog spans 1030–1440 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 850 mm bore?

This index lists 12 verified bearing models with a 850 mm (33.465 in) bore across 4 bearing types, from 1030 to 1440 mm outside diameter. Open any model for the full specification table, seal/clearance options and graded cross references.

How do I choose between the 1030–1440 mm OD options for a 850 mm shaft?

On a fixed 850 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 850 mm bearings?

A 850 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 850 mm is bore code 170 (code × 5), so a 62-series bearing with this bore is the 62170.