External dimensions（mm)
| D2 | 35 |
| d | 45 |
| D | 85 |
| t1 | 52 |
| T5 | 56.2 |
| T7 | 62 |
γ
(minimum) | 1 |
| γ1(minimum) | 0.6 |
Bearing code
Flat bottomed seat
loop type | 52309 |
Heart regulating ball
Facial shape | 54309 |
Spherical seat
loop type | 54309U |
size（mm)
| d3 | 85 |
| d1 | 47 |
| D2 | 65 |
| d3 | 90 |
| T2 | 32 |
| T6 | 34.1 |
| T8 | 37 |
| B | 12 |
| B | 10 |
| A1 | 21 |
| R | 64 |
Installation size(mm)
da
(maximum） | 65 |
γa
(maximum) | 1 |
γb
(maximum) | 0.6 |
weight（kg）
（refer to）
Flat bottomed seat
loop type | 1.28 |
Heart regulating ball
Facial shape | 1.34 |
Spherical seat
loop type | 1.71 |
describe
52309 Bearings are mainly used in industries such as construction machinery, machine tools, automobiles, metallurgy, mining, petroleum, machinery, electricity, and railways
