| Bearing number | QJ 1256 N2MA |
| Size (mm) | 500x280x90 |
| Bore Diameter (mm) | 500 |
| Outer Diameter (mm) | 280 |
| Width (mm) | 90 |
| d | 280 mm |
| D | 500 mm |
| B | 90 mm |
| d1 | 365 mm |
| D1 | 415 mm |
| a | 390 mm |
| h | 12.5 mm |
| b | 15 mm |
| r0 | 2.5 mm |
| r1,2 - min. | 5 mm |
| da - min. | 302 mm |
| Da - max. | 478 mm |
| ra - max. | 4 mm |
| Basic dynamic load rating - C | 728 kN |
| Basic static load rating - C0 | 1460 kN |
| Fatigue load limit - Pu | 31.5 kN |
| Reference speed | 1300 r/min |
| Limiting speed | 2000 r/min |
| Calculation factor - ka | 0.9 |
| Calculation factor - e | 1.34 |
| Calculation factor - X | 0.54 |
| Calculation factor - Y0 | 0.44 |
| Calculation factor - Y1 | 0.47 |
| Calculation factor - Y2 | 0.81 |
| d1 ≈ | 365 mm |
| D1 ≈ | 415 mm |
| r1,2 min. | 5 mm |
| da min. | 302 mm |
| Da max. | 478 mm |
| ra max. | 4 mm |
| Basic dynamic load rating C | 728 kN |
| Basic static load rating C0 | 1460 kN |
| Fatigue load limit Pu | 31.5 kN |
| Calculation factor A | 13 |
| Calculation factor e | 1.34 |
| Calculation factor X | 0.54 |
| Calculation factor Y0 | 0.44 |
| Calculation factor Y1 | 0.47 |
| Calculation factor Y2 | 0.81 |
| Mass bearing | 82 kg |
