External dimensions（mm)
| d | 25.4 |
| D | 57.15 |
| T | 17.462 |
| B | 17.462 |
| C | 13.495 |
Inner ring
γ(minimum) | 1.3 |
Outer Ring
γ(minimum) | 1.5 |
Bearing code
| Inner ring | 15578 |
| Outer Ring | 15520 |
Installation size (mm)
| da | 32.5 |
| db | 30.5 |
| da | 51 |
| db | 53 |
| Inner circle γa（maximum） | 1.3 |
| Outer circle γa（maximum） | 1.5 |
Location of
action point(mm)
weight（kg）
（refer to）
| Inner ring | 0.151 |
| Outer Ring | 0.07 |
describe
Bearings are mainly used in industries such as construction machinery, machine tools, automobiles, metallurgy, mining, petroleum, machinery, electricity, and railways
