External dimensions（mm)
| d | 40 |
| D | 90 |
| T | 36 |
| T3 | 38.2 |
| T4 | 42 |
γ
(minimum) | 1.1 |
Bearing code
Flat bottomed seat
loop type | 51408 |
Heart regulating ball
Face seat | 53408 |
Spherical seat
loop type | 53408U |
size（mm)
| d1 | 90 |
| d1 | 42 |
| D2 | 65 |
| d3 | 95 |
| B | 12 |
| A | 26 |
| R | 72 |
Installation size(mm)
Da
(minimum） | 70 |
da
(maximum） | 60 |
γa
(maximum) | 1 |
weight(kg)(refer to)
Flat bottomed seat
loop type | 1.1 |
Heart regulating ball
Facial shape | 1.12 |
Spherical seat
loop type | 1.38 |
describe
51408 Bearings are mainly used in industries such as construction machinery, machine tools, automobiles, metallurgy, mining, petroleum, machinery, electricity, and railways
