External dimensions（mm)
| d | 280 |
| D | 380 |
| T | 80 |
| T3 | 85 |
| T4 | 94 |
γ
(minimum) | 2.1 |
Bearing code
Flat bottomed seat
loop type | 51256X |
Heart regulating ball
Face seat | 53256X |
Spherical seat
loop type | 53256XU |
size（mm)
| d1 | 375 |
| d1 | 284 |
| D2 | 325 |
| d3 | 390 |
| B | 31 |
| A | 143 |
| R | 280 |
Installation size(mm)
Da
(minimum） | 339 |
da
(maximum） | 321 |
γa
(maximum) | 2 |
weight(kg)(refer to)
Flat bottomed seat
loop type | 27.1 |
Heart regulating ball
Facial shape | 30.3 |
Spherical seat
loop type | 37 |
describe
51256X Bearings are mainly used in industries such as construction machinery, machine tools, automobiles, metallurgy, mining, petroleum, machinery, electricity, and railways
