External dimensions（mm)
| d | 140 |
| D | 200 |
| T | 46 |
| T3 | 48.6 |
| T4 | 55 |
γ
(minimum) | 1.5 |
Bearing code
Flat bottomed seat
loop type | 51228X |
Heart regulating ball
Face seat | 53228X |
Spherical seat
loop type | 53228XU |
size（mm)
| d1 | 197 |
| d1 | 143 |
| D2 | 170 |
| d3 | 210 |
| B | 17 |
| A | 87 |
| R | 160 |
Installation size(mm)
Da
(minimum） | 176 |
da
(maximum） | 164 |
γa
(maximum) | 1.5 |
weight(kg)(refer to)
Flat bottomed seat
loop type | 4.3 |
Heart regulating ball
Facial shape | 4.74 |
Spherical seat
loop type | 5.89 |
describe
51228X Bearings are mainly used in industries such as construction machinery, machine tools, automobiles, metallurgy, mining, petroleum, machinery, electricity, and railways
