Bearings with a 20 mm bore
26 bearings on this site have a 20 mm bore, across 8 outside diameters (28–52 mm). Use the table to find one by its outside diameter and width, then open its page for the cross-brand equivalents and interchange notes.
| Designation | Type | Bore (mm) | Outside Ø (mm) | Width (mm) |
|---|---|---|---|---|
| RNA4902 | Needle Roller Bearing | 20 | 28 | 13 |
| 6804 | Deep Groove Ball Bearing | 20 | 32 | 7 |
| 51104 | Thrust Ball Bearing | 20 | 35 | 10 |
| 6904 | Deep Groove Ball Bearing | 20 | 37 | 9 |
| 51204 | Thrust Ball Bearing | 20 | 40 | 14 |
| 16004 | Deep Groove Ball Bearing | 20 | 42 | 8 |
| 6004 | Deep Groove Ball Bearing | 20 | 42 | 12 |
| 7004 | Angular Contact Ball Bearing | 20 | 42 | 12 |
| 1204 | Self-Aligning Ball Bearing | 20 | 47 | 14 |
| 2204 | Self-Aligning Ball Bearing | 20 | 47 | 18 |
| 30204 | Tapered Roller Bearing | 20 | 47 | 15.25 |
| 6204 | Deep Groove Ball Bearing | 20 | 47 | 14 |
| 7204 | Angular Contact Ball Bearing | 20 | 47 | 14 |
| N204 | Cylindrical Roller Bearing | 20 | 47 | 14 |
| NU204 | Cylindrical Roller Bearing | 20 | 47 | 14 |
| NU2204 | Cylindrical Roller Bearing | 20 | 47 | 18 |
| UC204 | Insert (Mounted) Ball Bearing | 20 | 47 | 31 |
| 1304 | Self-Aligning Ball Bearing | 20 | 52 | 15 |
| 2304 | Self-Aligning Ball Bearing | 20 | 52 | 21 |
| 30304 | Tapered Roller Bearing | 20 | 52 | 16.25 |
| 6304 | Deep Groove Ball Bearing | 20 | 52 | 15 |
| 7304 | Angular Contact Ball Bearing | 20 | 52 | 15 |
| N304 | Cylindrical Roller Bearing | 20 | 52 | 15 |
| NU2304 | Cylindrical Roller Bearing | 20 | 52 | 21 |
| NU304 | Cylindrical Roller Bearing | 20 | 52 | 15 |
| QJ304 | Four-Point Contact Ball Bearing | 20 | 52 | 15 |
Not the bore you need? See the full bearing size chart to pick another bore diameter, or read identify an unmarked bearing to work back from three measurements.
Dimensional reference only (20 mm bore, per ISO boundary-dimension standards). Confirm load ratings and suitability in the manufacturer's catalogue.