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420 mm bore bearings

33 models with a 420 mm (16.535 in) bore across 5 bearing types, outside diameters from 520 to 760 mm. Tables are grouped by type; open a model for full specs and equivalents.

33 models 520–760 mm OD range 2 brands

CARB Toroidal Roller Bearings (6)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
C3984-KM C3900 420 560 106 SKF open CN 2160
C3984-M C3900 420 560 106 SKF open CN 2160
C3084-KM C3000 420 620 150 SKF open CN 3800
C3084-M C3000 420 620 150 SKF open CN 3800
C3184-KM C3100 420 700 224 SKF open CN 6000
C3184-M C3100 420 700 224 SKF open CN 6000

Cylindrical Roller Bearings (8)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
NCF1884-V NCF1800 420 520 46 SKF open CN 660
NU1884-MP NU1800 420 520 46 SKF open CN 572
NCF2984-V NCF2900 420 560 82 SKF open CN 1650
NU2984-ECMA NU2900 420 560 82 SKF open CN 1400
NUP3984-ECMA NUP3900 420 560 106 SKF open CN 1680
NU1084-MA NU1000 420 620 90 SKF open CN 1420
NCF3084-CV NCF3000 420 620 150 SKF open CN 3030
NU3184-ECMA NU3100 420 700 224 SKF open CN 4950

Deep Groove Ball Bearings (6)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
61884 61800 420 520 46 NTN open CN 288
61884-MA 61800 420 520 46 SKF open CN 251
61984 61900 420 560 65 NTN open CN 380
61984-MA 61900 420 560 65 SKF open CN 351
6084 6000 420 620 90 NTN open CN 590
6084-M 6000 420 620 90 SKF open CN 507

Spherical Roller Bearings (10)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
23984 23900 420 560 106 SKF open CN 2083
23984-CCK-W33 23900 420 560 106 SKF open CN 2083
24084 24000 420 620 200 SKF open CN 4610
24084-ECAK30-W33 24000 420 620 200 SKF open CN 4610
23184 23100 420 700 224 SKF open CN 5919
23184-CKJ-W33 23100 420 700 224 SKF open CN 5919
24184 24100 420 700 280 SKF open CN 7577
24184-ECAK30-W33 24100 420 700 280 SKF open CN 7577
23284 23200 420 760 272 SKF open CN 7677
23284-CAK-W33 23200 420 760 272 SKF open CN 7677

Spherical Roller Thrust Bearings (3)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
29284 29200 420 580 95 SKF open CN 1990
29384 29300 420 650 140 SKF open CN 3740
29484-EM 29400 420 730 185 SKF open CN 7800

Exact-dimension interchange groups at 420 mm bore

These d×D×B envelopes at a 420 mm bore are shared by several series or brands — the starting point for a dimensional cross reference:

Selecting a 420 mm bore bearing

The bore fixes the shaft, not the bearing capacity. At 420 mm the catalog spans 520–760 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 420 mm bore?

This index lists 33 verified bearing models with a 420 mm (16.535 in) bore across 5 bearing types, from 520 to 760 mm outside diameter. Open any model for the full specification table, seal/clearance options and graded cross references.

How do I choose between the 520–760 mm OD options for a 420 mm shaft?

On a fixed 420 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 420 mm bearings?

A 420 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 420 mm is bore code 84 (code × 5), so a 62-series bearing with this bore is the 6284.