External dimensions（mm)
| d | 20 |
| D | 40 |
| T | 14 |
| T3 | 14.7 |
| T4 | 17 |
γ
(minimum) | 0.6 |
Bearing code
Flat bottomed seat
loop type | 51204 |
Heart regulating ball
Face seat | 53204 |
Spherical seat
loop type | 53204U |
size（mm)
| d1 | 40 |
| d1 | 22 |
| D2 | 30 |
| d3 | 42 |
| B | 5 |
| A | 18 |
| R | 36 |
Installation size(mm)
Da
(minimum） | 32 |
da
(maximum） | 28 |
γa
(maximum) | 0.6 |
weight(kg)(refer to)
Flat bottomed seat
loop type | 0.077 |
Heart regulating ball
Facial shape | 0.08 |
Spherical seat
loop type | 0.096 |
describe
51204 Bearings are mainly used in industries such as construction machinery, machine tools, automobiles, metallurgy, mining, petroleum, machinery, electricity, and railways
