External dimensions（mm)
| d | 100 |
| D | 170 |
| T | 55 |
| T3 | 59.2 |
| T4 | 64 |
γ
(minimum) | 1.5 |
Bearing code
Flat bottomed seat
loop type | 51320 |
Heart regulating ball
Face seat | 53320 |
Spherical seat
loop type | 53320U |
size（mm)
| d1 | 170 |
| d1 | 103 |
| D2 | 135 |
| d3 | 175 |
| B | 18 |
| A | 46 |
| R | 125 |
Installation size(mm)
Da
(minimum） | 142 |
da
(maximum） | 128 |
γa
(maximum) | 1.5 |
weight(kg)(refer to)
Flat bottomed seat
loop type | 4.98 |
Heart regulating ball
Facial shape | 5.31 |
Spherical seat
loop type | 6.37 |
describe
51320 Bearings are mainly used in industries such as construction machinery, machine tools, automobiles, metallurgy, mining, petroleum, machinery, electricity, and railways
