External dimensions（mm)
| d | 17 |
| D | 35 |
| T | 12 |
| T3 | 13.2 |
| T4 | 15 |
γ
(minimum) | 0.6 |
Bearing code
Flat bottomed seat
loop type | 51203 |
Heart regulating ball
Face seat | 53203 |
Spherical seat
loop type | 53203U |
size（mm)
| d1 | 35 |
| d1 | 19 |
| D2 | 26 |
| d3 | 38 |
| B | 4 |
| A | 16 |
| R | 32 |
Installation size(mm)
Da
(minimum） | 28 |
da
(maximum） | 24 |
γa
(maximum) | 0.6 |
weight(kg)(refer to)
Flat bottomed seat
loop type | 0.05 |
Heart regulating ball
Facial shape | 0.055 |
Spherical seat
loop type | 0.069 |
describe
51203 Bearings are mainly used in industries such as construction machinery, machine tools, automobiles, metallurgy, mining, petroleum, machinery, electricity, and railways
