SKF J 72 bearing Size Chart (mm/inches) |
|---|
| Bearing number | RNA0-55X68X20 |
| Size (mm) | 55x68x20 |
| Bore Diameter (mm) | 55,000 |
| Outer Diameter (mm) | 68,000 |
| Width (mm) | 20,000 |
| Fw | 55,000 mm |
| D | 68,000 mm |
| C | 20,000 mm |
| E | 60 mm |
| rs min | 0.6 mm |
| Dw | 2.5 mm |
| Lw | 15.8 mm |
| Lubrication hole on outer ring | Non/No |
| Radial clearance class | CN |
| Precision class | P0 |
| Mass | 0.17 kg |
| Cr | 28.8 kN |
| C0r | 66.5 kN |
| Nlim (grease) | 4,800 rpm |
| Nlim (oil) | 7,500 rpm |
| Min operating temperature, Tmin | -20 °C |
| Max operating temperature, Tmax | 120 °C |
| Characteristic cage frequency, FTF | 0.48 Hz |
| Characteristic rolling element frequency, BSF | 22.96 Hz |
| Characteristic outer ring frequency, BPF0 | 19.61 Hz |
| Characteristic inner ring frequency, BPFI | 21.39 Hz |
| db | 59.4 mm |
| Da max | 64 mm |
| Db | 55.8 mm |
| ras max | 0.6 mm |