12 models in the FIR series, 7–85 mm bore. Every row links to the full specification page and to the cross-reference page of that model.
| Model | Brand | Bore d (mm) | OD D (mm) | Width B (mm) | |
|---|---|---|---|---|---|
| FIR-71016-1 | NSK | 7 | 10 | 16 | — |
| FIR-172226-1 | NSK | 17 | 22 | 26 | — |
| FIR-172232-1 | NSK | 17 | 22 | 32 | — |
| FIR-202531-1 | NSK | 20 | 25 | 31 | — |
| FIR-202532-1 | NSK | 20 | 25 | 32 | — |
| FIR-283217-1 | NSK | 28 | 32 | 17 | — |
| FIR-303517-1 | NSK | 30 | 35 | 17 | — |
| FIR-303518-1 | NSK | 30 | 35 | 18 | — |
| FIR-758525-1 | NSK | 75 | 85 | 25 | — |
| FIR-758540-1 | NSK | 75 | 85 | 40 | — |
| FIR-8510063-1 | NSK | 85 | 100 | 63 | — |
| FIR-8510064-1 | NSK | 85 | 100 | 64 | — |
FIR series bearings follow the ISO dimension plan for this family, so a given number is dimensionally interchangeable between brands - see the cross-reference to confirm. Choose the suffix for your duty: shields for dry, clean positions, contact seals for wet or dusty ones, and a larger clearance class where the fit or temperature demands it.
Other Custom & Special Bearings series: 62 · 685 · 63 · 60 · SNV · K · BND · 697