External dimensions（mm)
| d | 254 |
| D | 442.275 |
| T | 86.121 |
| B | 79.771 |
| C | 66.675 |
Inner ring
γ(minimum) | 6.4 |
Outer Ring
γ(minimum) | 3.3 |
Rated speed min-1
| grease | HM252343 |
| oil | HM252310 |
Bearing code
| Inner ring | 301 |
| Outer Ring | 278 |
Installation size (mm)
| da | 392 |
| db | 408 |
| da | 6.8 |
| db | 3.3 |
| Inner circle γa（maximum） | 77.6 |
| Outer circle γa（maximum） | 0.33 |
Location of
action point(mm)
describe
Bearings are mainly used in industries such as construction machinery, machine tools, automobiles, metallurgy, mining, petroleum, machinery, electricity, and railways
