29 models with a 20.638 mm bore in this type, with outer diameter and width. Outer diameters on this page run from 26.988 mm to 28.575 mm.
| Model | Brand | Type | OD D (mm) | Width B (mm) | |
|---|---|---|---|---|---|
| BA 1310Z | IKO | Needle Roller Bearings | 26.988 | 15.88 | — |
| BA 1312Z | IKO | Needle Roller Bearings | 26.988 | 19.05 | — |
| BA 1314Z | IKO | Needle Roller Bearings | 26.988 | 22.22 | — |
| BA 1316Z | IKO | Needle Roller Bearings | 26.988 | 25.4 | — |
| BA 1320Z | IKO | Needle Roller Bearings | 26.988 | 31.75 | — |
| BA 136Z | IKO | Needle Roller Bearings | 26.988 | 9.52 | — |
| BA 138Z | IKO | Needle Roller Bearings | 26.988 | 12.7 | — |
| BAM 1310 | IKO | Needle Roller Bearings | 26.988 | 15.88 | — |
| BAM 1312 | IKO | Needle Roller Bearings | 26.988 | 19.05 | — |
| BAM 1314 | IKO | Needle Roller Bearings | 26.988 | 22.22 | — |
| BAM 1316 | IKO | Needle Roller Bearings | 26.988 | 25.4 | — |
| BAM 1320 | IKO | Needle Roller Bearings | 26.988 | 31.75 | — |
| BAM 136 | IKO | Needle Roller Bearings | 26.988 | 9.52 | — |
| BAM 138 | IKO | Needle Roller Bearings | 26.988 | 12.7 | — |
| J-1314 | NSK | Needle Roller Bearings | 26.988 | 22.22 | — |
| WJ-131714 | NSK | Needle Roller Bearings | 26.988 | 22.22 | — |
| YB 136 | IKO | Needle Roller Bearings | 26.988 | 9.52 | — |
| YB 138 | IKO | Needle Roller Bearings | 26.988 | 12.7 | — |
| BHA 1310Z | IKO | Needle Roller Bearings | 28.575 | 15.88 | — |
| BHA 1312Z | IKO | Needle Roller Bearings | 28.575 | 19.05 | — |
| BHA 138Z | IKO | Needle Roller Bearings | 28.575 | 12.7 | — |
| BHAM 1310 | IKO | Needle Roller Bearings | 28.575 | 15.88 | — |
| BHAM 1312 | IKO | Needle Roller Bearings | 28.575 | 19.05 | — |
| BHAM 138 | IKO | Needle Roller Bearings | 28.575 | 12.7 | — |
| JH-1312 | NSK | Needle Roller Bearings | 28.575 | 19.05 | — |
| MJH-13121 | NSK | Needle Roller Bearings | 28.575 | 19.05 | — |
| SCH-1310 | ANDGE | Needle Roller Bearings | 28.575 | 15.88 | — |
| YBH 1310 | IKO | Needle Roller Bearings | 28.575 | 15.88 | — |
| YBH 1312 | IKO | Needle Roller Bearings | 28.575 | 19.05 | — |
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.