57 models in the 31 series, 7.95–78.6 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) | |
|---|---|---|---|---|---|
| 3103 | SKF | 7.95 | Cross-ref → | ||
| 3141 | SKF | 7.95 | — | ||
| 3171 | SKF | 7.95 | — | ||
| 3189/3120 | TIMKEN | 25.4 | 72.626 | 29.997 | Cross-ref → |
| 3192/20 | KOYO | 28.575 | 72.626 | 29.997 | — |
| 3198/20 | KOYO | 28.575 | 72.626 | 29.997 | — |
| 31RFNU3624 | KOYO | 31 | 36 | 24.4 | — |
| 3199/3120-B | TIMKEN | 31.75 | 72.644 | 11.113 | — |
| 3197/3120 | TIMKEN | 33.337 | 72.626 | 30.175 | — |
| 3197/3120-B | TIMKEN | 33.337 | 72.644 | 11.113 | — |
| 3151 087 041 | ANDGE | 41.5 | 102.5 | — | |
| 3151 044 031 | ANDGE | 42 | 92 | — | |
| 3151 095 043 | ANDGE | 42 | 92 | — | |
| 3151.044.031 | ANDGE | 42.05 | 92 | — | |
| 3151 068 101 | ANDGE | 45 | 92 | — | |
| 3151 000 079 | ANDGE | 47.5 | 92 | — | |
| 3151 000 396 | ANDGE | 50.6 | 106 | — | |
| 3151 000 397 | ANDGE | 51.6 | 106 | — | |
| 3151 027 131 | ANDGE | 54.05 | 110 | — | |
| 3151 126 031 | ANDGE | 54.05 | 110 | — | |
| 3151 000 140 | ANDGE | 54.4 | 110 | — | |
| 3151 272 631 | ANDGE | 54.5 | 110 | — | |
| 3151 245 032 | ANDGE | 54.5 | 125.6 | — | |
| 3151 043 032 | ANDGE | 54.6 | 110 | — | |
| 3151 007 303 | ANDGE | 57 | 110 | — | |
| 3151 067 031 | ANDGE | 57 | 110 | — | |
| 3151 152 102 | ANDGE | 57 | 110 | — | |
| 3151.007.303 | ANDGE | 57.05 | 110 | — | |
| 3151 000 419 | ANDGE | 57.5 | 109 | — | |
| 3151 253 031 | ANDGE | 57.5 | 117.7 | — | |
| 3100 002 549 | ANDGE | 58.5 | 124 | — | |
| 3100 002 550 | ANDGE | 58.5 | 124 | — | |
| 3151 000 512 | ANDGE | 60 | 108 | — | |
| 3151 110 031 | ANDGE | 60 | 110 | — | |
| 3151.108.031 | ANDGE | 60.05 | 110 | — | |
| 3151 245 031 | ANDGE | 60.4 | 125.6 | — | |
| 3100 000 003 | ANDGE | 60.5 | 124 | — | |
| 3100 008 201 | ANDGE | 60.5 | 124 | — | |
| 3151 000 034 | ANDGE | 60.5 | 124 | — | |
| 3151 000 157 | ANDGE | 60.5 | 124 | — | |
| 3151 000 335 | ANDGE | 60.5 | 124 | — | |
| 3151 262 031 | ANDGE | 60.5 | 132.5 | — | |
| 3151 274 131 | ANDGE | 60.5 | 155 | — | |
| 3151 238 032 | ANDGE | 60.6 | 126.6 | — | |
| 3100 002 255 | ANDGE | 60.7 | 124 | — | |
| 3151 246 031 | ANDGE | 60.8 | 126.6 | — | |
| 3151 000 144 | ANDGE | 63.2 | 124 | — | |
| 3151 000 151 | ANDGE | 63.2 | 124 | — | |
| 3151 000 493 | ANDGE | 63.2 | 124 | — | |
| 3151 000 117 | ANDGE | 66.2 | 126 | — | |
| 3100 026 431 | ANDGE | 66.7 | 124 | — | |
| 3100 026 432 | ANDGE | 66.7 | 124 | — | |
| 3100 026 433 | ANDGE | 66.7 | 124 | — | |
| 3100 026 434 | ANDGE | 66.7 | 124 | — | |
| 3100 026 531 | ANDGE | 66.7 | 126 | — | |
| 3151 263 031 | ANDGE | 78.5 | 132.5 | — | |
| 3100 002 258 | ANDGE | 78.6 | 124 | — |
31 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