External dimensions（mm)
| d | 120 |
| D | 170 |
| T | 39 |
| T3 | 40.8 |
| T4 | 46 |
γ
(minimum) | 1.1 |
Bearing code
Flat bottomed seat
loop type | 51224 |
Heart regulating ball
Face seat | 53224 |
Spherical seat
loop type | 53224U |
size（mm)
| d1 | 170 |
| d1 | 123 |
| D2 | 145 |
| d3 | 175 |
| B | 15 |
| A | 61 |
| R | 125 |
Installation size(mm)
Da
(minimum） | 150 |
da
(maximum） | 140 |
γa
(maximum) | 1 |
weight(kg)(refer to)
Flat bottomed seat
loop type | 2.7 |
Heart regulating ball
Facial shape | 2.94 |
Spherical seat
loop type | 3.58 |
describe
51224 Bearings are mainly used in industries such as construction machinery, machine tools, automobiles, metallurgy, mining, petroleum, machinery, electricity, and railways
