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25.4 mm bore bearings

30 models with a 25.4 mm (1.000 in) bore across 2 bearing types, outside diameters from 50.005 to 66.421 mm. Tables are grouped by type; open a model for full specs and equivalents.

30 models 50.005–66.421 mm OD range 2 brands

Insert Bearings (Y-bearings) (13)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
YET-205-100 YEL2 25.4 52 21.5 SKF open CN 14
YAT-205-100 YAR2 25.4 52 27.2 SKF open CN 14
YSP-205-100-SB-2F YSP2 25.4 52 33.2 SKF 2RS CN 14
YSPAG-205-100 YSP2 25.4 52 33.2 SKF 2RS CN 14
YAR-205-100-2F YAR2 25.4 52 34.1 SKF 2RS CN 14
YAR-205-100-2RF YAR2 25.4 52 34.1 SKF 2RS CN 14
YAR-205-100-2RF-HV YAR2 25.4 52 34.1 SKF 2RS CN 11.9
YAR-205-100-2RF-VE495 YAR2 25.4 52 34.1 SKF 2RS CN 14
YAR-205-100-2RFGR-HV YAR2 25.4 52 34.1 SKF 2RS CN 11.9
YARAG-205-100 YAR2 25.4 52 34.1 SKF 2RS CN 14
YEL-205-100-2F YEL2 25.4 52 34.9 SKF 2RS CN 14
YELAG-205-100 YEL2 25.4 52 34.9 SKF 2RS CN 14
YSA-206-2FK-HE-2306 YSA2 25.4 62 28 SKF 2RS CN 19.5

Tapered Roller Bearings (17)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
07100-07196 4t-inch 25.4 50.005 13.495 NTN open CN 28.8
07100S-07196 4t-inch 25.4 50.005 13.495 NTN open CN 28.8
L44643-610 L44600 25.4 50.292 14.224 SKF open CN 32
L44643-L44610 4t-inch 25.4 50.292 14.224 NTN open CN 32
07100-07204 4t-inch 25.4 51.994 15.011 NTN open CN 28.8
1780-1729 4t-inch 25.4 56.896 19.368 NTN open CN 47.5
15578-15520 15500 25.4 57.15 17.462 SKF open CN 49.1
M84548-510 M84500 25.4 57.15 19.431 SKF open CN 48.8
M84548-M84510 4t-inch 25.4 57.15 19.431 NTN open CN 47
15101-15243 4t-inch 25.4 61.912 19.05 NTN open CN 52
15100-15245 4t-inch 25.4 62 19.05 NTN open CN 52
15101-15245 15000 25.4 62 19.05 SKF open CN 59.5
15102-15245 4t-inch 25.4 62 19.05 NTN open CN 52
15103S-15245 15000 25.4 62 19.05 SKF open CN 59.5
M86643-M86610 4t-inch 25.4 64.292 21.433 NTN open CN 57.5
23100-23256 4t-inch 25.4 65.088 22.225 NTN open CN 52
2687-2631 4t-inch 25.4 66.421 23.812 NTN open CN 71.5

Exact-dimension interchange groups at 25.4 mm bore

These d×D×B envelopes at a 25.4 mm bore are shared by several series or brands — the starting point for a dimensional cross reference:

Selecting a 25.4 mm bore bearing

The bore fixes the shaft, not the bearing capacity. At 25.4 mm the catalog spans 50.005–66.421 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 25.4 mm bore?

This index lists 30 verified bearing models with a 25.4 mm (1.000 in) bore across 2 bearing types, from 50.005 to 66.421 mm outside diameter. Open any model for the full specification table, seal/clearance options and graded cross references.

How do I choose between the 50.005–66.421 mm OD options for a 25.4 mm shaft?

On a fixed 25.4 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 25.4 mm bearings?

A 25.4 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.