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44.45 mm bore bearings

32 models with a 44.45 mm (1.750 in) bore across 2 bearing types, outside diameters from 76.992 to 111.125 mm. Tables are grouped by type; open a model for full specs and equivalents.

32 models 76.992–111.125 mm OD range 2 brands

Insert Bearings (Y-bearings) (1)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
YSA-210-2FK-HE-2310 YSA2 44.45 90 37 SKF 2RS CN 35.1

Tapered Roller Bearings (31)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
12175-12303 4t-inch 44.45 76.992 17.462 NTN open CN 48.5
18685-18620 4t-inch 44.45 79.375 17.462 NTN open CN 50.5
25580-25520 25500 44.45 82.931 23.812 SKF open CN 99.1
25580-25520-NTN 4t-inch 44.45 82.931 23.812 NTN open CN 84.5
25582-25520 4t-inch 44.45 82.931 23.812 NTN open CN 84.5
25580-25522 25500 44.45 82.931 26.988 SKF open CN 99.1
25580-25523 25500 44.45 82.931 26.988 SKF open CN 99.1
3578-3520 4t-inch 44.45 84.138 30.162 NTN open CN 104
355-354A 4t-inch 44.45 85 20.638 NTN open CN 77.5
3578-3525 4t-inch 44.45 87.312 30.162 NTN open CN 104
HM803149-110 HM803000 44.45 88.9 30.162 SKF open CN 116
HM803149-HM803110 4t-inch 44.45 88.9 30.162 NTN open CN 104
3782-3720-NTN 4t-inch 44.45 93.264 30.162 NTN open CN 113
3782-3720 3700 44.45 93.264 30.163 SKF open CN 134
46175-46368 4t-inch 44.45 93.662 31.75 NTN open CN 115
33885-33821 4t-inch 44.45 95.25 27.783 NTN open CN 119
438-432 4t-inch 44.45 95.25 27.783 NTN open CN 120
HM804842-HM804810 4t-inch 44.45 95.25 30.162 NTN open CN 120
53177-53375 4t-inch 44.45 95.25 30.958 NTN open CN 91.5
53178-53377 53000 44.45 95.25 30.958 SKF open CN 108
HM903249-210 HM903200 44.45 95.25 30.958 SKF open CN 124
HM903249-HM903210 4t-inch 44.45 95.25 30.958 NTN open CN 107
527-522 4t-inch 44.45 101.6 34.925 NTN open CN 150
45280-45220 4t-inch 44.45 104.775 30.162 NTN open CN 144
460-453X 4t-inch 44.45 104.775 30.162 NTN open CN 127
HM807040-010 HM-807000 44.45 104.775 36.512 SKF open CN 180
HM807040-HM807010 4t-inch 44.45 104.775 36.512 NTN open CN 153
535-532X 535 44.45 107.95 36.512 SKF open CN 183
55175C-55437 4t-inch 44.45 111.125 30.162 NTN open CN 115
55176C-55437 4t-inch 44.45 111.125 30.162 NTN open CN 115
535-532A 535 44.45 111.125 38.1 SKF open CN 183

Exact-dimension interchange groups at 44.45 mm bore

These d×D×B envelopes at a 44.45 mm bore are shared by several series or brands — the starting point for a dimensional cross reference:

Selecting a 44.45 mm bore bearing

The bore fixes the shaft, not the bearing capacity. At 44.45 mm the catalog spans 76.992–111.125 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 44.45 mm bore?

This index lists 32 verified bearing models with a 44.45 mm (1.750 in) bore across 2 bearing types, from 76.992 to 111.125 mm outside diameter. Open any model for the full specification table, seal/clearance options and graded cross references.

How do I choose between the 76.992–111.125 mm OD options for a 44.45 mm shaft?

On a fixed 44.45 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 44.45 mm bearings?

A 44.45 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). Bore diameters below 20 mm follow the 10/12/15/17 mm exception table rather than code × 5.