MPNbase

105 mm bore bearings

125 models with a 105 mm (4.134 in) bore across 8 bearing types, outside diameters from 125 to 260 mm. Tables are grouped by type; open a model for full specs and equivalents.

125 models 125–260 mm OD range 5 brands

Angular Contact Ball Bearings (16)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
7921 7900 105 145 20 NTN open CN 54
7021 7000 105 160 26 GENERIC-ISO open CN —
7021-NTN 7000 105 160 26 NTN open CN 88.5
7221 7200 105 190 36 SKF open CN 156
7221-BECBM 7200 105 190 36 SKF open CN 156
7221-BECBP 7200 105 190 36 SKF open CN 156
7221-NTN 7200 105 190 36 NTN open CN 173
7221B 7200 105 190 36 NTN open CN 157
QJ221 QJ200 105 190 36 NTN open CN 218
7321 7300 105 225 49 SKF open CN 203
7321-BECBP 7300 105 225 49 SKF open CN 216
7321-BEP 7300 105 225 49 SKF open CN 203
7321-DECBM 7300 105 225 49 SKF open CN 216
7321-NTN 7300 105 225 49 NTN open CN 244
7321B 7300 105 225 49 NTN open CN 224
QJ321 QJ300 105 225 49 NTN open CN 305

CARB Toroidal Roller Bearings (1)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
C2222-K-AHX3122 carb-withdrawal-sleeve 105 200 53 SKF open CN 530

Cylindrical Roller Bearings (28)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
NN4921 NN4900 105 145 40 NTN open CN 147
NN4921K NN4900 105 145 40 NTN open CN 147
NNU4921K NNU4900 105 145 40 NTN open CN 147
N1021 N1000 105 160 26 NTN open CN 117
NJ1021 NJ1000 105 160 26 NTN open CN 117
NU1021 NU1000 105 160 26 NTN open CN 117
NU1021-ML NU1000 105 160 26 SKF open CN 101
NUP1021 NUP1000 105 160 26 NTN open CN 117
NN3021 NN3000 105 160 41 NTN open CN 220
NN3021K NN3000 105 160 41 NTN open CN 220
N221 N200 105 190 36 NTN open CN 223
N221-ECP N200 105 190 36 SKF open CN 300
NF221 NF200 105 190 36 NTN open CN 223
NJ221 NJ200 105 190 36 NTN open CN 223
NJ221-ECP NJ200 105 190 36 SKF open CN 300
NU221 NU200 105 190 36 NTN open CN 223
NU221-ECP NU200 105 190 36 SKF open CN 300
NUP221 NUP200 105 190 36 NTN open CN 223
NUP221-ECP NUP200 105 190 36 SKF open CN 300
N321 N300 105 225 49 NTN open CN 355
N321-ECP N300 105 225 49 SKF open CN 500
NF321 NF300 105 225 49 NTN open CN 355
NJ321 NJ300 105 225 49 NTN open CN 355
NJ321-ECP NJ300 105 225 49 SKF open CN 500
NU321 NU300 105 225 49 NTN open CN 355
NU321-ECP NU300 105 225 49 SKF open CN 500
NUP321 NUP300 105 225 49 NTN open CN 355
NU421-M NU400 105 260 60 SKF open CN 501

Deep Groove Ball Bearings (45)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
61821 61800 105 130 13 SKF open CN 20.8
61821-2RS 61800 105 130 13 SKF 2RS CN 20.8
61821-2RS-NSK 61800 105 130 13 NSK 2RS CN 21.8
61821-2RS-NTN 61800 105 130 13 NTN 2RS CN 22
61821-NSK 61800 105 130 13 NSK open CN 21.8
61821-NTN 61800 105 130 13 NTN open CN 22
61821-RSR 61800 105 130 13 SKF RSR CN 20.8
61821-RSR-NSK 61800 105 130 13 NSK RSR CN 21.8
61821-ZZ 61800 105 130 13 NSK ZZ CN 21.8
61821-ZZ-NTN 61800 105 130 13 NTN ZZ CN 22
61921 61900 105 145 20 SKF open CN 44.2
61921-2RS 61900 105 145 20 NTN 2RS CN 47
61921-NSK 61900 105 145 20 NSK open CN 46.5
61921-NTN 61900 105 145 20 NTN open CN 47
61921-RSR 61900 105 145 20 NSK RSR CN 46.5
61921-RSR-NTN 61900 105 145 20 NTN RSR CN 47
61921-ZZ 61900 105 145 20 NSK ZZ CN 46.5
61921-ZZ-NTN 61900 105 145 20 NTN ZZ CN 47
16021 16000 105 160 18 NTN open CN 57.5
6021 6000 105 160 26 SKF open CN 76.1
6021-2RS 6000 105 160 26 SKF 2RS CN 76.1
6021-2RS-NSK 6000 105 160 26 NSK 2RS CN 79.5
6021-M 6000 105 160 26 SKF open CN 76.1
6021-NSK 6000 105 160 26 NSK open CN 79.5
6021-RSR 6000 105 160 26 NSK RSR CN 79.5
6021-ZZ 6000 105 160 26 SKF ZZ CN 76.1
6021-ZZ-NSK 6000 105 160 26 NSK ZZ CN 79.5
6221 6200 105 190 36 SKF open CN 140
6221-2RS 6200 105 190 36 NSK 2RS CN 146
6221-2RS-NTN 6200 105 190 36 NTN 2RS CN 147
6221-NSK 6200 105 190 36 NSK open CN 146
6221-NTN 6200 105 190 36 NTN open CN 147
6221-RSR 6200 105 190 36 NSK RSR CN 146
6221-RSR-NTN 6200 105 190 36 NTN RSR CN 147
6221-ZZ 6200 105 190 36 SKF ZZ CN 140
6221-ZZ-NSK 6200 105 190 36 NSK ZZ CN 146
6221-ZZ-NTN 6200 105 190 36 NTN ZZ CN 147
6321 6300 105 225 49 SKF open CN 182
6321-2RS 6300 105 225 49 NSK 2RS CN 202
6321-2RS-NTN 6300 105 225 49 NTN 2RS CN 204
6321-NSK 6300 105 225 49 NSK open CN 202
6321-NTN 6300 105 225 49 NTN open CN 204
6321-ZZ 6300 105 225 49 SKF ZZ CN 182
6321-ZZ-NSK 6300 105 225 49 NSK ZZ CN 202
6321-ZZ-NTN 6300 105 225 49 NTN ZZ CN 204

Needle Roller Bearings (8)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
NK105-26 NK 105 125 26 SKF open CN 78.1
NK105-26-XL nk 105 125 26 FAG open CN 89
RNA4918 RNA-49 105 125 35 SKF open CN 112
RNA4918-XL rna49 105 125 35 FAG open CN 129
NK105-36 NK 105 125 36 SKF open CN 112
NK105-36-XL nk 105 125 36 FAG open CN 129
RNA6918 RNA-69 105 125 63 SKF open CN 172
RNA6918-ZW-XL rna69 105 125 63 FAG open CN 195

Pillow Block Bearings (2)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
UCFL321 UCFL 105 225 112 NTN 2RS — 204
UCP321 UCP 105 225 112 NTN 2RS — 204

Self-Aligning Ball Bearings (3)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
1221 1200 105 190 36 NTN open — 75
2221 2200 105 190 50 NTN open — 109
1321 1300 105 225 49 NTN open — 154

Tapered Roller Bearings (22)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
32921XA 32900 105 145 25 NTN open CN 139
32021 32000 105 160 35 FAG open CN 238
32021-SKF 32000 105 160 35 SKF open CN 248
32021XU 32000 105 160 35 NTN open CN 223
33021 33000 105 160 43 SKF open CN 303
33021U 33000 105 160 43 NTN open CN 272
32021X-DF matched-df 105 160 70 SKF open CN 426
30221 30200 105 190 39 SKF open CN 333
30221U 30200 105 190 39 NTN open CN 320
32221 32200 105 190 53 FAG open CN 455
32221-SKF 32200 105 190 53 SKF open CN 443
32221U 32200 105 190 53 NTN open CN 420
30221-DF matched-df 105 190 78 SKF open CN 571
30221T88-DB matched-db 105 190 88 SKF open CN 571
430221XU 4t-430 105 190 88 NTN open CN 545
32221-DF matched-df 105 190 106 SKF open CN 760
432221XU 4t-432 105 190 115 NTN open CN 720
30321 30300 105 225 53.5 SKF open CN 462
30321U 30300 105 225 53.5 NTN open CN 485
31321XU 31300 105 225 58 NTN open CN 420
32321 32300 105 225 81.5 SKF open CN 645
32321U 32300 105 225 81.5 NTN open CN 680

Exact-dimension interchange groups at 105 mm bore

These d×D×B envelopes at a 105 mm bore are shared by several series or brands — the starting point for a dimensional cross reference:

Selecting a 105 mm bore bearing

The bore fixes the shaft, not the bearing capacity. At 105 mm the catalog spans 125–260 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 105 mm bore?

This index lists 125 verified bearing models with a 105 mm (4.134 in) bore across 8 bearing types, from 125 to 260 mm outside diameter. Open any model for the full specification table, seal/clearance options and graded cross references.

How do I choose between the 125–260 mm OD options for a 105 mm shaft?

On a fixed 105 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 105 mm bearings?

A 105 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 105 mm is bore code 21 (code × 5), so a 62-series bearing with this bore is the 6221.