External dimensions（mm)
| d | 42.875 |
| D | 83.058 |
| T | 23.812 |
| B | 25.4 |
| C | 19.05 |
Inner ring
γ(minimum) | 3.5 |
Outer Ring
γ(minimum) | 3.3 |
Bearing code
| Inner ring | 25577 |
| Outer Ring | 25521 |
Installation size (mm)
| da | 55 |
| db | 49 |
| da | 72 |
| db | 77 |
| Inner circle γa（maximum） | 3.5 |
| Outer circle γa（maximum） | 3.3 |
Location of
action point(mm)
weight（kg）
（refer to）
| Inner ring | 0.381 |
| Outer Ring | 0.201 |
describe
Bearings are mainly used in industries such as construction machinery, machine tools, automobiles, metallurgy, mining, petroleum, machinery, electricity, and railways
