External dimensions（mm)
| D2 | 30 |
| d | 40 |
| D | 68 |
| t1 | 36 |
| T5 | 38.6 |
| T7 | 44 |
γ
(minimum) | 1 |
| γ1(minimum) | 0.6 |
Bearing code
Flat bottomed seat
loop type | 52208 |
Heart regulating ball
Facial shape | 54208 |
Spherical seat
loop type | 54208U |
size（mm)
| d3 | 68 |
| d1 | 42 |
| D2 | 55 |
| d3 | 72 |
| T2 | 22.5 |
| T6 | 23.8 |
| T8 | 26.5 |
| B | 9 |
| B | 7 |
| A1 | 25 |
| R | 56 |
Installation size(mm)
da
(maximum） | 55 |
γa
(maximum) | 1 |
γb
(maximum) | 0.6 |
weight（kg）
（refer to）
Flat bottomed seat
loop type | 0.543 |
Heart regulating ball
Facial shape | 0.581 |
Spherical seat
loop type | 0.713 |
describe
52208 Bearings are mainly used in industries such as construction machinery, machine tools, automobiles, metallurgy, mining, petroleum, machinery, electricity, and railways
