23 models in the 681 series, 1–92.075 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) | |
|---|---|---|---|---|---|
| 681 | KOYO | 1 | 3 | 1 | Cross-ref → |
| 68102RD | KOYO | 50 | 65 | 7 | — |
| 68102RS | KOYO | 50 | 65 | 7 | — |
| 68102RU | KOYO | 50 | 65 | 7 | — |
| 68112RD | KOYO | 55 | 72 | 9 | — |
| 68112RU | KOYO | 55 | 72 | 9 | — |
| 68122RD | KOYO | 60 | 78 | 10 | — |
| 68122RU | KOYO | 60 | 78 | 10 | — |
| 68132RD | KOYO | 65 | 85 | 10 | — |
| 68132RU | KOYO | 65 | 85 | 10 | — |
| 68142RD | KOYO | 70 | 90 | 10 | — |
| 68142RU | KOYO | 70 | 90 | 10 | — |
| 68152RD | KOYO | 75 | 95 | 10 | — |
| 68152RU | KOYO | 75 | 95 | 10 | — |
| 68162RD | KOYO | 80 | 100 | 10 | — |
| 68162RU | KOYO | 80 | 100 | 10 | — |
| 68172RD | KOYO | 85 | 110 | 13 | — |
| 68172RU | KOYO | 85 | 110 | 13 | — |
| 68182RD | KOYO | 90 | 115 | 13 | — |
| 68182RU | KOYO | 90 | 115 | 13 | — |
| 681/672-B | TIMKEN | 92.075 | 168.148 | 18.255 | — |
| 681/672 | KOYO | 92.075 | 168.275 | 41.275 | Cross-ref → |
| 681A/672 | KOYO | 92.075 | 168.275 | 41.275 | Cross-ref → |
681 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