MPNbase

280 mm bore bearings

47 models with a 280 mm (11.024 in) bore across 7 bearing types, outside diameters from 350 to 580 mm. Tables are grouped by type; open a model for full specs and equivalents.

47 models 350–580 mm OD range 2 brands

CARB Toroidal Roller Bearings (4)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
C3056 C3000 280 420 106 SKF open CN 1860
C3056-K C3000 280 420 106 SKF open CN 1860
C3156 C3100 280 460 146 SKF open CN 2850
C3156-K C3100 280 460 146 SKF open CN 2850

Cylindrical Roller Bearings (17)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
NCF1856-V NCF1800 280 350 33 SKF open CN 341
NNC4856-CV NNC4800 280 350 69 SKF open CN 737
NNCF4856-CV NNCF4800 280 350 69 SKF open CN 737
NNCL4856-CV NNCL4800 280 350 69 SKF open CN 737
NCF2956-CV NCF2900 280 380 60 SKF open CN 880
NNC4956-CV NNC4900 280 380 100 SKF open CN 1210
NNCF4956-CV NNCF4900 280 380 100 SKF open CN 1210
NNCL4956-CV NNCL4900 280 380 100 SKF open CN 1210
NU1056-ML NU1000 280 420 65 SKF open CN 660
NCF3056-CV NCF3000 280 420 106 SKF open CN 1570
NNCF5056-CV NNCF5000 280 420 190 SKF open CN 2920
NNF5056-B-2LS NNF5000 280 420 190 SKF 2RS CN 2550
NU3156-ECMA NU3100 280 460 146 SKF open CN 2290
NJ256-MA NJ200 280 500 80 SKF open CN 1140
NU256-MA NU200 280 500 80 SKF open CN 1190
NU2256-ECML NU2200 280 500 130 SKF open CN 2330
NU2356-MA NU2300 280 580 175 SKF open CN 2700

Cylindrical Roller Thrust Bearings (1)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
81156-M 81100 280 350 53 SKF open CN 680

Deep Groove Ball Bearings (9)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
61856 61800 280 350 33 SKF open CN 138
61856-MA 61800 280 350 33 SKF open CN 138
61956 61900 280 380 46 SKF open CN 216
61956-MA 61900 280 380 46 SKF open CN 216
16056 16000 280 420 44 NTN open CN 257
16056-MA 16000 280 420 44 SKF open CN 242
6056 6000 280 420 65 SKF open CN 302
6056-M 6000 280 420 65 SKF open CN 302
6256-M 6200 280 500 80 SKF open CN 423

Needle Roller Bearings (1)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
NA4856 NA-48 280 350 69 SKF open CN 429

Spherical Roller Bearings (12)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
23956 23900 280 380 75 SKF open CN 1016
23956-CCK-W33 23900 280 380 75 SKF open CN 1016
23056 23000 280 420 106 SKF open CN 1797
23056-CCK-W33 23000 280 420 106 SKF open CN 1797
24056 24000 280 420 140 SKF open CN 2248
24056-CCK30-W33 24000 280 420 140 SKF open CN 2248
23156 23100 280 460 146 SKF open CN 2784
23156-CCK-W33 23100 280 460 146 SKF open CN 2784
24156 24100 280 460 180 SKF open CN 3183
24156-CCK30-W33 24100 280 460 180 SKF open CN 3183
23256 23200 280 500 176 SKF open CN 3425
23256-CCK-W33 23200 280 500 176 SKF open CN 3425

Spherical Roller Thrust Bearings (3)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
29256 29200 280 380 60 SKF open CN 863
29356-E 29300 280 440 95 SKF open CN 2550
29456-E 29400 280 520 145 SKF open CN 4900

Exact-dimension interchange groups at 280 mm bore

These d×D×B envelopes at a 280 mm bore are shared by several series or brands — the starting point for a dimensional cross reference:

Selecting a 280 mm bore bearing

The bore fixes the shaft, not the bearing capacity. At 280 mm the catalog spans 350–580 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 280 mm bore?

This index lists 47 verified bearing models with a 280 mm (11.024 in) bore across 7 bearing types, from 350 to 580 mm outside diameter. Open any model for the full specification table, seal/clearance options and graded cross references.

How do I choose between the 350–580 mm OD options for a 280 mm shaft?

On a fixed 280 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 280 mm bearings?

A 280 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 280 mm is bore code 56 (code × 5), so a 62-series bearing with this bore is the 6256.