External dimensions（mm)
| d | 30.162 |
| D | 69.85 |
| T | 23.812 |
| B | 25.357 |
| C | 19.05 |
Inner ring
γ(minimum) | 2.3 |
Outer Ring
γ(minimum) | 1.3 |
Bearing code
| Inner ring | 2558 |
| Outer Ring | 2523 |
Installation size (mm)
| da | 40 |
| db | 36.5 |
| da | 61 |
| db | 64 |
| Inner circle γa（maximum） | 2.3 |
| Outer circle γa（maximum） | 1.3 |
Location of
action point(mm)
weight（kg）
（refer to）
| Inner ring | 0.297 |
| Outer Ring | 0.169 |
describe
Bearings are mainly used in industries such as construction machinery, machine tools, automobiles, metallurgy, mining, petroleum, machinery, electricity, and railways
