External dimensions（mm)
| d | 220 |
| D | 270 |
| B | 24 |
| γ(minimum) | 1.5 |
| γ1(minimum) | 1 |
Rated load（Single -row）（KN）
Rated load（Single -row）{kgf}
Location of action point(mm)
Install related sizes(mm)
| da（minimum） | 239 |
| da(maximum） | 255 |
| γa（maximum） | 1.5 |
Bearing code
| Single -row | 7844B |
| DB combination | DB |
| DF combination | DF |
| DT combination | DT |
Rated load( Combination form)（KN）
Rated load( Combination form){kgf}
Combination formRated speed （1）（min-1）
Combination formLocation of distance（mm）a0
| The back combination | 229.6 |
| Front combination | 181.6 |
Combination formInstall related sizes（mm）
| Db(minimum) | — |
| db(maximum） | 258 |
| γb(maximum | 1 |
describe
Bearings are mainly used in industries such as construction machinery, machine tools, automobiles, metallurgy, mining, petroleum, machinery, electricity, and railways
