Bearing QJ 309 MA SKF QJ 309 MA SKF bearing Size Chart (mm/inches) |
|---|
| d | 30 mm |
| D | 55 mm |
| B | 13 mm |
| d1 | 38.1 mm |
| d2 | 36.15 mm |
| D1 | 48.55 mm |
| D2 | 50.15 mm |
| a | 13 mm |
| Contact angle α | 17 ° |
| rs min | 1 mm |
| r1s min | 0.6 mm |
| f0 | 7.98 |
| Precision class | P4S |
| Mass | 0.11 kg |
| Dynamic load, C | 8.1 kN |
| Static load, C0 | 4.7 kN |
| Fatigue limit load, Cu | 0.27 kN |
| Nlim (oil) | 52,000 rpm |
| Nlim (grease) | 38,000 rpm |
| Axial displacement K Factor | 1.38 |
| Preload level | 8 |
| Preload value | 0.12 kN |
| Axial rigidity | 53 N/µm |
| Radial rigidity | 250 N/µm |
| Min operating temperature, Tmin | -30 °C |
| Max operating temperature, Tmax | 120 °C |
| Characteristic cage frequency, FTF | 0.44 Hz |
| Characteristic rolling element frequency, BSF | 7.38 Hz |
| Characteristic outer ring frequency, BPF0 | 8.73 Hz |
| Characteristic inner ring frequency, BPFI | 11.27 Hz |
| da min | 35.5 mm |
| db min | 35.5 mm |
| Da max | 49.5 mm |
| Db max | 49.5 mm |
| r1a max | 0.6 mm |
| ra max | 1 mm |
| D6 | 40.1 mm |