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31.75 mm bore bearings

42 models with a 31.75 mm (1.250 in) bore across 2 bearing types, outside diameters from 59.131 to 80 mm. Tables are grouped by type; open a model for full specs and equivalents.

42 models 59.131–80 mm OD range 2 brands

Insert Bearings (Y-bearings) (19)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
YET-206-104 YEL2 31.75 62 23.8 SKF open CN 19.5
YAT-206-104 YAR2 31.75 62 30.2 SKF open CN 19.5
YAR-206-104-2F YAR2 31.75 62 38.1 SKF 2RS CN 19.5
YAR-206-104-2RF-HV YAR2 31.75 62 38.1 SKF 2RS CN 16.3
YAR-206-104-2RF-VE495 YAR2 31.75 62 38.1 SKF 2RS CN 19.5
YAR-206-104-2RFGR-HV YAR2 31.75 62 38.1 SKF 2RS CN 16.3
YARAG-206-104 YAR2 31.75 62 38.1 SKF 2RS CN 19.5
YET-207-104 YEL2 31.75 72 25.4 SKF open CN 25.5
YEL-207-104-2F YEL2 31.75 72 37.6 SKF 2RS CN 25.5
YELAG-207-104 YEL2 31.75 72 37.6 SKF 2RS CN 25.5
YSP-207-104-SB-2F YSP2 31.75 72 39.7 SKF 2RS CN 25.5
YSPAG-207-104 YSP2 31.75 72 39.7 SKF 2RS CN 25.5
YAR-207-104-2F YAR2 31.75 72 42.9 SKF 2RS CN 25.5
YAR-207-104-2RF YAR2 31.75 72 42.9 SKF 2RS CN 25.5
YAR-207-104-2RF-HV YAR2 31.75 72 42.9 SKF 2RS CN 21.6
YAR-207-104-2RF-VE495 YAR2 31.75 72 42.9 SKF 2RS CN 25.5
YAR-207-104-2RFGR-HV YAR2 31.75 72 42.9 SKF 2RS CN 21.6
YARAG-207-104 YAR2 31.75 72 42.9 SKF 2RS CN 25.5
YSA-208-2FK-HE-2308 YSA2 31.75 80 33.9 SKF 2RS CN 30.7

Tapered Roller Bearings (23)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
LM67048-010 LM67000 31.75 59.131 15.875 SKF open CN 42.8
LM67048-LM67010 4t-inch 31.75 59.131 15.875 NTN open CN 38.5
15123-15243 15000 31.75 61.912 18.161 SKF open CN 59.5
15123-15245 15000 31.75 62 18.161 SKF open CN 59.5
15123-15245-NTN 4t-inch 31.75 62 18.161 NTN open CN 52
15125-15245 4t-inch 31.75 62 19.05 NTN open CN 52
15126-15245 4t-inch 31.75 62 19.05 NTN open CN 52
2580-2520 4t-inch 31.75 66.421 25.4 NTN open CN 76.5
02475-02420 4t-inch 31.75 68.262 22.225 NTN open CN 63
02476-02420 4t-inch 31.75 68.262 22.225 NTN open CN 63
14124-14276 4t-inch 31.75 69.012 19.845 NTN open CN 53.5
14125A-14276 4t-inch 31.75 69.012 19.845 NTN open CN 53.5
2580-2523 4t-inch 31.75 69.85 23.812 NTN open CN 76.5
2582-2523 4t-inch 31.75 69.85 23.812 NTN open CN 76.5
3188-3120 4t-inch 31.75 72.626 30.162 NTN open CN 93.5
3193-3120 4t-inch 31.75 72.626 30.162 NTN open CN 93.5
02875-02820 4t-inch 31.75 73.025 22.225 NTN open CN 62.5
2879-2820 4t-inch 31.75 73.025 22.225 NTN open CN 69.5
HM88542-510 HM88500 31.75 73.025 29.37 SKF open CN 86.5
HM88542-HM88510 4t-inch 31.75 73.025 29.37 NTN open CN 80
HM88542-HM88512 4t-inch 31.75 73.812 29.37 NTN open CN 80
HM89440-HM89410 4t-inch 31.75 76.2 29.37 NTN open CN 86.5
3476-3420 4t-inch 31.75 79.375 29.37 NTN open CN 103

Exact-dimension interchange groups at 31.75 mm bore

These d×D×B envelopes at a 31.75 mm bore are shared by several series or brands — the starting point for a dimensional cross reference:

Selecting a 31.75 mm bore bearing

The bore fixes the shaft, not the bearing capacity. At 31.75 mm the catalog spans 59.131–80 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 31.75 mm bore?

This index lists 42 verified bearing models with a 31.75 mm (1.250 in) bore across 2 bearing types, from 59.131 to 80 mm outside diameter. Open any model for the full specification table, seal/clearance options and graded cross references.

How do I choose between the 59.131–80 mm OD options for a 31.75 mm shaft?

On a fixed 31.75 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 31.75 mm bearings?

A 31.75 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.