31 models with a 63 mm bore in this type, with outer diameter and width. Outer diameters on this page run from 70 mm to 80 mm.
| Model | Brand | Type | OD D (mm) | Width B (mm) | |
|---|---|---|---|---|---|
| K 63×70×40 | ANDGE | Needle Roller Bearings | 70 | 40 | — |
| K 63×70×40ZW | ANDGE | Needle Roller Bearings | 70 | 40 | — |
| K Series 63×70×40ZW | ANDGE | Needle Roller Bearings | 70 | 40 | — |
| KK 63×70×40 | ANDGE | Needle Roller Bearings | 70 | 40 | — |
| K 63×71×20 | ANDGE | Needle Roller Bearings | 71 | 20 | Cross-ref → |
| K/Series 63×71×Series 20 | ANDGE | Needle Roller Bearings | 71 | 20 | — |
| K63X71X20 | ANDGE | Needle Roller Bearings | 71 | 20 | Cross-ref → |
| K63×71×20 | ANDGE | Needle Roller Bearings | 71 | 20 | Cross-ref → |
| KT 637120 | IKO | Needle Roller Bearings | 71 | 20 | — |
| KT637120 | IKO | Needle Roller Bearings | 71 | 20 | — |
| DS 63807 | IKO | Needle Roller Bearings | 80 | 7 | — |
| OS 63807 | IKO | Needle Roller Bearings | 80 | 7 | — |
| RNA 4911 | NSK | Needle Roller Bearings | 80 | 25 | Cross-ref → |
| RNA 4911 | IKO | Needle Roller Bearings | 80 | 25 | Cross-ref → |
| RNA 4911 | ANDGE | Needle Roller Bearings | 80 | 25 | Cross-ref → |
| RNA 4911 | SKF | Needle Roller Bearings | 80 | 25 | Cross-ref → |
| RNA 4911U | IKO | Needle Roller Bearings | 80 | 25 | — |
| RNA 4911UU | IKO | Needle Roller Bearings | 80 | 25 | — |
| RNA 5911 | NSK | Needle Roller Bearings | 80 | 34 | Cross-ref → |
| RNA 6911 | ANDGE | Needle Roller Bearings | 80 | 45 | Cross-ref → |
| RNA 6911 | IKO | Needle Roller Bearings | 80 | 45 | Cross-ref → |
| RNA 6911 | SKF | Needle Roller Bearings | 80 | 45 | Cross-ref → |
| RNA 6911 | NSK | Needle Roller Bearings | 80 | 45 | Cross-ref → |
| RNA 6911U | IKO | Needle Roller Bearings | 80 | 45 | — |
| RNA 6911UU | IKO | Needle Roller Bearings | 80 | 45 | — |
| RNA4911R | NTN | Needle Roller Bearings | 80 | 25 | Cross-ref → |
| RNA4911R | ANDGE | Needle Roller Bearings | 80 | 25 | Cross-ref → |
| RNA5911 | NTN | Needle Roller Bearings | 80 | 34 | Cross-ref → |
| RNA5911 | ANDGE | Needle Roller Bearings | 80 | 34 | Cross-ref → |
| RNA6911A | ANDGE | Needle Roller Bearings | 80 | 45 | Cross-ref → |
| RNA6911R | NTN | Needle Roller Bearings | 80 | 45 | — |
The bore is the shaft diameter, so it is the one dimension you cannot change: pick the bore first, then decide the type from the load and speed, then the outer diameter from the housing you have. If the housing is fixed, filter by outer diameter in the product center. For fits and shaft tolerances see the fit recommendations.