External dimensions（mm)
| D2 | 100 |
| d | 120 |
| D | 170 |
| t1 | 68 |
| T5 | 71.6 |
| T7 | 82 |
γ
(minimum) | 1.1 |
| γ1(minimum) | 1.1 |
Bearing code
Flat bottomed seat
loop type | 52224 |
Heart regulating ball
Facial shape | 54224 |
Spherical seat
loop type | 54224U |
size（mm)
| d3 | 170 |
| d1 | 123 |
| D2 | 145 |
| d3 | 175 |
| T2 | 41.5 |
| T6 | 43.3 |
| T8 | 48.5 |
| B | 15 |
| B | 15 |
| A1 | 58.5 |
| R | 125 |
Installation size(mm)
da
(maximum） | 145 |
γa
(maximum) | 1 |
γb
(maximum) | 1 |
weight（kg）
（refer to）
Flat bottomed seat
loop type | 4.92 |
Heart regulating ball
Facial shape | 5.4 |
Spherical seat
loop type | 6.68 |
describe
52224 Bearings are mainly used in industries such as construction machinery, machine tools, automobiles, metallurgy, mining, petroleum, machinery, electricity, and railways
