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320 mm bore bearings

45 models with a 320 mm (12.598 in) bore across 7 bearing types, outside diameters from 400 to 670 mm. Tables are grouped by type; open a model for full specs and equivalents.

45 models 400–670 mm OD range 2 brands

CARB Toroidal Roller Bearings (4)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
C3064-KM C3000 320 480 121 SKF open CN 2280
C3064-M C3000 320 480 121 SKF open CN 2280
C3164-KM C3100 320 540 176 SKF open CN 4150
C3164-M C3100 320 540 176 SKF open CN 4150

Cylindrical Roller Bearings (16)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
NCF1864-V NCF1800 320 400 38 SKF open CN 440
NNC4864-CV NNC4800 320 400 80 SKF open CN 897
NNCF4864-CV NNCF4800 320 400 80 SKF open CN 897
NNCL4864-CV NNCL4800 320 400 80 SKF open CN 897
NU1964-ECMA NU1900 320 440 56 SKF open CN 693
NCF2964-V NCF2900 320 440 72 SKF open CN 1140
NNC4964-CV NNC4900 320 440 118 SKF open CN 1760
NNCF4964-CV NNCF4900 320 440 118 SKF open CN 1760
NNCL4964-CV NNCL4900 320 440 118 SKF open CN 1760
NJ1064-MA NJ1000 320 480 74 SKF open CN 880
NU1064-MA NU1000 320 480 74 SKF open CN 880
NCF3064-CV NCF3000 320 480 121 SKF open CN 1980
NNCF5064-CV NNCF5000 320 480 218 SKF open CN 3690
NU264-ECM NU200 320 580 92 SKF open CN 1830
NU2264-ECML NU2200 320 580 150 SKF open CN 3190
NU2364-ECMA NU2300 320 670 200 SKF open CN 4730

Cylindrical Roller Thrust Bearings (1)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
81164-M 81100 320 400 63 SKF open CN 880

Deep Groove Ball Bearings (8)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
61864 61800 320 400 38 SKF open CN 172
61864-MA 61800 320 400 38 SKF open CN 172
61964 61900 320 440 56 NTN open CN 315
61964-MA 61900 320 440 56 SKF open CN 276
16064 16000 320 480 50 NTN open CN 335
16064-MA 16000 320 480 50 SKF open CN 281
6064 6000 320 480 74 NTN open CN 410
6064-M 6000 320 480 74 SKF open CN 371

Needle Roller Bearings (1)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
NA4864 NA-48 320 400 80 SKF open CN 605

Spherical Roller Bearings (12)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
23964 23900 320 440 90 SKF open CN 1480
23964-CCK-W33 23900 320 440 90 SKF open CN 1480
23064 23000 320 480 121 SKF open CN 2348
23064-CCK-W33 23000 320 480 121 SKF open CN 2348
24064 24000 320 480 160 SKF open CN 2969
24064-CCK30-W33 24000 320 480 160 SKF open CN 2969
23164 23100 320 540 176 SKF open CN 3923
23164-CCK-W33 23100 320 540 176 SKF open CN 3923
24164 24100 320 540 218 SKF open CN 4395
24164-CCK30-W33 24100 320 540 218 SKF open CN 4395
23264 23200 320 580 208 SKF open CN 4607
23264-CCK-W33 23200 320 580 208 SKF open CN 4607

Spherical Roller Thrust Bearings (3)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
29264 29200 320 440 73 SKF open CN 1110
29364-E 29300 320 500 109 SKF open CN 3350
29464-E 29400 320 580 155 SKF open CN 5700

Exact-dimension interchange groups at 320 mm bore

These d×D×B envelopes at a 320 mm bore are shared by several series or brands — the starting point for a dimensional cross reference:

Selecting a 320 mm bore bearing

The bore fixes the shaft, not the bearing capacity. At 320 mm the catalog spans 400–670 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 320 mm bore?

This index lists 45 verified bearing models with a 320 mm (12.598 in) bore across 7 bearing types, from 400 to 670 mm outside diameter. Open any model for the full specification table, seal/clearance options and graded cross references.

How do I choose between the 400–670 mm OD options for a 320 mm shaft?

On a fixed 320 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 320 mm bearings?

A 320 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 320 mm is bore code 64 (code × 5), so a 62-series bearing with this bore is the 6264.