External dimensions（mm)
| d | 40 |
| D | 68 |
| T | 19 |
| T3 | 20.3 |
| T4 | 23 |
γ
(minimum) | 1 |
Bearing code
Flat bottomed seat
loop type | 51208 |
Heart regulating ball
Face seat | 53208 |
Spherical seat
loop type | 53208U |
size（mm)
| d1 | 68 |
| d1 | 42 |
| D2 | 55 |
| d3 | 72 |
| B | 7 |
| A | 28.5 |
| R | 56 |
Installation size(mm)
Da
(minimum） | 57 |
da
(maximum） | 51 |
γa
(maximum) | 1 |
weight(kg)(refer to)
Flat bottomed seat
loop type | 0.27 |
Heart regulating ball
Facial shape | 0.289 |
Spherical seat
loop type | 0.355 |
describe
51208 Bearings are mainly used in industries such as construction machinery, machine tools, automobiles, metallurgy, mining, petroleum, machinery, electricity, and railways
