External dimensions（mm)
| d | 12 |
| D | 28 |
| T | 11 |
| T3 | 11.4 |
| T4 | 13 |
γ
(minimum) | 0.6 |
Bearing code
Flat bottomed seat
loop type | 51201 |
Heart regulating ball
Face seat | 53201 |
Spherical seat
loop type | 53201U |
size（mm)
| d1 | 28 |
| d1 | 14 |
| D2 | 20 |
| d3 | 30 |
| B | 3.5 |
| A | 11.5 |
| R | 25 |
Installation size(mm)
Da
(minimum） | 22 |
da
(maximum） | 18 |
γa
(maximum) | 0.6 |
weight(kg)(refer to)
Flat bottomed seat
loop type | 0.031 |
Heart regulating ball
Facial shape | 0.031 |
Spherical seat
loop type | 0.039 |
describe
51201 Bearings are mainly used in industries such as construction machinery, machine tools, automobiles, metallurgy, mining, petroleum, machinery, electricity, and railways
