External dimensions（mm)
| d | 55 |
| D | 90 |
| T | 25 |
| T3 | 27.3 |
| T4 | 30 |
γ
(minimum) | 1 |
Bearing code
Flat bottomed seat
loop type | 51211 |
Heart regulating ball
Face seat | 53211 |
Spherical seat
loop type | 53211U |
size（mm)
| d1 | 90 |
| d1 | 57 |
| D2 | 72 |
| d3 | 95 |
| B | 9 |
| A | 35 |
| R | 72 |
Installation size(mm)
Da
(minimum） | 76 |
da
(maximum） | 69 |
γa
(maximum) | 1 |
weight(kg)(refer to)
Flat bottomed seat
loop type | 0.599 |
Heart regulating ball
Facial shape | 0.656 |
Spherical seat
loop type | 0.819 |
describe
51211 Bearings are mainly used in industries such as construction machinery, machine tools, automobiles, metallurgy, mining, petroleum, machinery, electricity, and railways
