External dimensions（mm)
| d | 3.175 |
| D | 12.7 |
| B | 4.366 |
| B1 | 4.366 |
| γ(minimum) | 0.3 |
Rated speed min-1
grease
Open type
Z·ZZ | 53000 |
oil
Open type
Z | 63000 |
Bearing code
| Open type | R2A |
| dust cover type | R2A ZZ |
Installation size(mm)
| da（minimum） | 5.2 |
| db(maximum） | 4.6 |
| Da（maximum） | 10.7 |
| db(maximum） | 8.2 |
| γa（maximum） | 0.3 |
weight(g)(refer to)
| Open type | 3.3 |
| dust cover type | 3.23 |
describe
Bearings are mainly used in industries such as construction machinery, machine tools, automobiles, metallurgy, mining, petroleum, machinery, electricity, and railways
