MPNbase

45 mm bore bearings

54 models with a 45 mm (1.772 in) bore across 8 bearing types, outside diameters from 52 to 120 mm. Tables are grouped by type; open a model for full specs and equivalents.

54 models 52–120 mm OD range 4 brands

Angular Contact Ball Bearings (6)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
71809 71800 45 58 7 GENERIC-ISO open CN —
71909 71900 45 68 12 GENERIC-ISO open CN —
7009 7000 45 75 16 GENERIC-ISO open CN —
7209 7200 45 85 19 GENERIC-ISO open CN —
7309 7300 45 100 25 GENERIC-ISO open CN —
7409 7400 45 120 29 GENERIC-ISO open CN —

Cylindrical Roller Bearings (4)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
NU209 NU200 45 85 19 GENERIC-ISO open CN —
NU2209 NU2200 45 85 23 GENERIC-ISO open CN —
NU309 NU300 45 100 25 GENERIC-ISO open CN —
NU2309 NU2300 45 100 36 GENERIC-ISO open CN —

Deep Groove Ball Bearings (24)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
61809 61800 45 58 7 SKF open CN 6.63
61809-2RS 61800 45 58 7 SKF 2RS CN 6.63
61809-RSR 61800 45 58 7 SKF RSR CN 6.63
61809-ZZ 61800 45 58 7 NSK ZZ CN 7.25
61909 61900 45 68 12 SKF open CN 14
61909-2RS 61900 45 68 12 SKF 2RS CN 14
61909-RSR 61900 45 68 12 SKF RSR CN 14
61909-ZZ 61900 45 68 12 NSK ZZ CN 15.5
16009 16000 45 75 10 NTN open CN 14.3
6009 6000 45 75 16 SKF open CN 22.1
6009-2RS 6000 45 75 16 SKF 2RS CN 22.1
6009-RSR 6000 45 75 16 NSK RSR CN 23
6009-ZZ 6000 45 75 16 SKF ZZ CN 22.1
6209 6200 45 85 19 SKF open CN 35.1
6209-2RS 6200 45 85 19 SKF 2RS CN 35.1
6209-RSR 6200 45 85 19 NSK RSR CN 34.5
6209-ZZ 6200 45 85 19 SKF ZZ CN 35.1
6309 6300 45 100 25 SKF open CN 55.3
6309-2RS 6300 45 100 25 SKF 2RS CN 55.3
6309-RSR 6300 45 100 25 NSK RSR CN 58.5
6309-ZZ 6300 45 100 25 SKF ZZ CN 55.3
6409 6400 45 120 29 SKF open CN 76.1
6409-2RS 6400 45 120 29 GENERIC-ISO 2RS CN 76.1
6409-ZZ 6400 45 120 29 NTN ZZ CN 85.5

Needle Roller Bearings (2)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
HK4516 HK 45 52 16 NTN open — 21.6
HK4520 HK 45 52 20 NTN open — 27.6

Self-Aligning Ball Bearings (8)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
1209 1200 45 85 19 NTN open — 22
1209K 1200 45 85 19 NTN open — 22
2209 2200 45 85 23 NTN open — 23.3
2209K 2200 45 85 23 NTN open — 23.3
1309 1300 45 100 25 NTN open — 38.5
1309K 1300 45 100 25 NTN open — 38.5
2309 2300 45 100 36 NTN open — 55
2309K 2300 45 100 36 NTN open — 55

Spherical Roller Bearings (2)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
22209 22200 45 85 23 GENERIC-ISO open CN —
22309 22300 45 100 36 GENERIC-ISO open CN —

Tapered Roller Bearings (4)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
32009 32000 45 75 20 GENERIC-ISO open CN —
30209 30200 45 85 20.75 GENERIC-ISO open CN —
32209 32200 45 85 24.75 GENERIC-ISO open CN —
32309 32300 45 100 38.25 GENERIC-ISO open CN —

Thrust Ball Bearings (4)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
51109 51100 45 65 14 NTN open — 27.9
51209 51200 45 73 20 NTN open — 47.5
51309 51300 45 85 28 NTN open — 80
51409 51400 45 100 39 NTN open — 130

Exact-dimension interchange groups at 45 mm bore

These d×D×B envelopes at a 45 mm bore are shared by several series or brands — the starting point for a dimensional cross reference:

Selecting a 45 mm bore bearing

The bore fixes the shaft, not the bearing capacity. At 45 mm the catalog spans 52–120 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 k5 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 45 mm bore?

This index lists 54 verified bearing models with a 45 mm (1.772 in) bore across 8 bearing types, from 52 to 120 mm outside diameter. Open any model for the full specification table, seal/clearance options and graded cross references.

How do I choose between the 52–120 mm OD options for a 45 mm shaft?

On a fixed 45 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 45 mm bearings?

A 45 mm bore on a rotating inner ring normally uses a k5 shaft seat with an H7 housing bore (verify against the catalogue for heavy or stationary-ring duty). In the ISO designation system 45 mm is bore code 09 (code × 5), so a 62-series bearing with this bore is the 6209.