Bearing 7221B KOYO 7221B KOYO bearing Size Chart (mm/inches) |
|---|
| Lubricant | Regular relubrication – grease |
| Design (sliding contact surface combination) | Steel/steel |
| Sealing solution | Triple-lip seals |
| d | 101.6 mm |
| D | 158.75 mm |
| B | 88.9 mm |
| C | 76.2 mm |
| α | 6 ° |
| dk | 146.05 mm |
| b | 10.5 mm |
| b1 | 10 mm |
| M | 8 mm |
| r1 min. | 0.6 mm |
| r2 min. | 1 mm |
| da min. | 108 mm |
| da max. | 115.5 mm |
| Da min. | 139.5 mm |
| Da max. | 152.5 mm |
| ra max. | 0.6 mm |
| rb max. | 1 mm |
| Basic dynamic load rating C | 900 kN |
| Basic static load rating C0 | 2650 kN |
| Specific dynamic load factor K | 100 N/mm² |
| Specific static load factor K0 | 300 N/mm² |
| Material constant KM | 330 |
| Mass plain bearing | 7 kg |