MPNbase

300 mm bore bearings

50 models with a 300 mm (11.811 in) bore across 7 bearing types, outside diameters from 380 to 620 mm. Tables are grouped by type; open a model for full specs and equivalents.

50 models 380–620 mm OD range 2 brands

CARB Toroidal Roller Bearings (6)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
C3060-KM C3000 300 460 118 SKF open CN 2160
C3060-M C3000 300 460 118 SKF open CN 2160
C4060-K30M C4000 300 460 160 SKF open CN 2900
C4060-M C4000 300 460 160 SKF open CN 2900
C3160 C3100 300 500 160 SKF open CN 3250
C3160-K C3100 300 500 160 SKF open CN 3250

Cylindrical Roller Bearings (17)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
NCF1860-V NCF1800 300 380 38 SKF open CN 418
NNC4860-CV NNC4800 300 380 80 SKF open CN 858
NNCF4860-CV NNCF4800 300 380 80 SKF open CN 858
NNCL4860-CV NNCL4800 300 380 80 SKF open CN 858
NCF2960-CV NCF2900 300 420 72 SKF open CN 1120
NNC4960-CV NNC4900 300 420 118 SKF open CN 1680
NNCF4960-CV NNCF4900 300 420 118 SKF open CN 1680
NNCL4960-CV NNCL4900 300 420 118 SKF open CN 1680
NJ1060-MA NJ1000 300 460 74 SKF open CN 858
NU1060-MA NU1000 300 460 74 SKF open CN 858
NU2060-ECMA NU2000 300 460 95 SKF open CN 1510
NCF3060-CV NCF3000 300 460 118 SKF open CN 1900
NNCF5060-CV NNCF5000 300 460 218 SKF open CN 3520
NU260-M NU200 300 540 85 SKF open CN 1420
NU2260-MA NU2200 300 540 140 SKF open CN 2090
NU360-ECM NU300 300 620 109 SKF open CN 2330
NU2360-ECMA NU2300 300 620 185 SKF open CN 4020

Cylindrical Roller Thrust Bearings (2)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
81160-M 81100 300 380 62 SKF open CN 850
81260-M 81200 300 420 95 SKF open CN 1530

Deep Groove Ball Bearings (9)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
61860 61800 300 380 38 SKF open CN 172
61860-MA 61800 300 380 38 SKF open CN 172
61960 61900 300 420 56 SKF open CN 270
61960-MA 61900 300 420 56 SKF open CN 270
16060 16000 300 460 50 NTN open CN 325
16060-MA 16000 300 460 50 SKF open CN 286
6060 6000 300 460 74 NTN open CN 395
6060-M 6000 300 460 74 SKF open CN 358
6260-M 6200 300 540 85 SKF open CN 462

Needle Roller Bearings (1)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
NA4860 NA-48 300 380 80 SKF open CN 594

Spherical Roller Bearings (12)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
23960 23900 300 420 90 SKF open CN 1413
23960-CCK-W33 23900 300 420 90 SKF open CN 1413
23060 23000 300 460 118 SKF open CN 2219
23060-CCK-W33 23000 300 460 118 SKF open CN 2219
24060 24000 300 460 160 SKF open CN 2821
24060-CCK30-W33 24000 300 460 160 SKF open CN 2821
23160 23100 300 500 160 SKF open CN 3368
23160-CCK-W33 23100 300 500 160 SKF open CN 3368
24160 24100 300 500 200 SKF open CN 3876
24160-CCK30-W33 24100 300 500 200 SKF open CN 3876
23260 23200 300 540 192 SKF open CN 4052
23260-CCK-W33 23200 300 540 192 SKF open CN 4052

Spherical Roller Thrust Bearings (3)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
29260 29200 300 420 73 SKF open CN 1070
29360-E 29300 300 480 109 SKF open CN 3100
29460-E 29400 300 540 145 SKF open CN 5000

Exact-dimension interchange groups at 300 mm bore

These d×D×B envelopes at a 300 mm bore are shared by several series or brands — the starting point for a dimensional cross reference:

Selecting a 300 mm bore bearing

The bore fixes the shaft, not the bearing capacity. At 300 mm the catalog spans 380–620 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 300 mm bore?

This index lists 50 verified bearing models with a 300 mm (11.811 in) bore across 7 bearing types, from 380 to 620 mm outside diameter. Open any model for the full specification table, seal/clearance options and graded cross references.

How do I choose between the 380–620 mm OD options for a 300 mm shaft?

On a fixed 300 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 300 mm bearings?

A 300 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 300 mm is bore code 60 (code × 5), so a 62-series bearing with this bore is the 6260.