External dimensions（mm)
| d | 25 |
| D | 52 |
| T | 18 |
| T3 | 19.8 |
| T4 | 22 |
γ
(minimum) | 1 |
Bearing code
Flat bottomed seat
loop type | 51305 |
Heart regulating ball
Face seat | 53305 |
Spherical seat
loop type | 53305U |
size（mm)
| d1 | 52 |
| d1 | 27 |
| D2 | 38 |
| d3 | 55 |
| B | 6 |
| A | 21 |
| R | 45 |
Installation size(mm)
Da
(minimum） | 41 |
da
(maximum） | 36 |
γa
(maximum) | 1 |
weight(kg)(refer to)
Flat bottomed seat
loop type | 0.169 |
Heart regulating ball
Facial shape | 0.182 |
Spherical seat
loop type | 0.224 |
describe
51305 Bearings are mainly used in industries such as construction machinery, machine tools, automobiles, metallurgy, mining, petroleum, machinery, electricity, and railways
