External dimensions（mm)
| d | 55 |
| D | 105 |
| T | 35 |
| T3 | 39.3 |
| T4 | 42 |
γ
(minimum) | 1.1 |
Bearing code
Flat bottomed seat
loop type | 51311 |
Heart regulating ball
Face seat | 53311 |
Spherical seat
loop type | 53311U |
size（mm)
| d1 | 105 |
| d1 | 57 |
| D2 | 80 |
| d3 | 110 |
| B | 11.5 |
| A | 30 |
| R | 80 |
Installation size(mm)
Da
(minimum） | 85 |
da
(maximum） | 75 |
γa
(maximum) | 1 |
weight(kg)(refer to)
Flat bottomed seat
loop type | 1.31 |
Heart regulating ball
Facial shape | 1.45 |
Spherical seat
loop type | 1.78 |
describe
51311 Bearings are mainly used in industries such as construction machinery, machine tools, automobiles, metallurgy, mining, petroleum, machinery, electricity, and railways
