External dimensions（mm)
| d | 71.438 |
| D | 130.175 |
| T | 41.275 |
| B | 41.275 |
| C | 31.75 |
Inner ring
γ(minimum) | 6.4 |
Outer Ring
γ(minimum) | 3.3 |
Bearing code
| Inner ring | 645 |
| Outer Ring | 633 |
Installation size (mm)
| da | 93 |
| db | 81 |
| da | 116 |
| db | 124 |
| Inner circle γa（maximum） | 6.4 |
| Outer circle γa（maximum） | 3.3 |
Location of
action point(mm)
weight（kg）
（refer to）
| Inner ring | 1.49 |
| Outer Ring | 0.712 |
describe
Bearings are mainly used in industries such as construction machinery, machine tools, automobiles, metallurgy, mining, petroleum, machinery, electricity, and railways
