External dimensions（mm)
| d | 35 |
| D | 68 |
| T | 24 |
| T3 | 25.6 |
| T4 | 28 |
γ
(minimum) | 1 |
Bearing code
Flat bottomed seat
loop type | 51307 |
Heart regulating ball
Face seat | 53307 |
Spherical seat
loop type | 53307U |
size（mm)
| d1 | 68 |
| d1 | 37 |
| D2 | 52 |
| d3 | 72 |
| B | 7.5 |
| A | 24 |
| R | 56 |
Installation size(mm)
Da
(minimum） | 55 |
da
(maximum） | 48 |
γa
(maximum) | 1 |
weight(kg)(refer to)
Flat bottomed seat
loop type | 0.386 |
Heart regulating ball
Facial shape | 0.403 |
Spherical seat
loop type | 0.488 |
describe
51307 Bearings are mainly used in industries such as construction machinery, machine tools, automobiles, metallurgy, mining, petroleum, machinery, electricity, and railways
