| Boundary dimensions (mm) | Mass (kg) | Bearing NO. | |||
| d | D | T | B | WSBC | |
| 45 | 100 | 54.5 | - | 2 | 31309/DF | 
Matched bearings arranged face-to-face have load lines that converge 
toward the bearing axis. Therefore, the arrangement can accommodate a 
limited amount of misalignment. Axial loads in both directions can be 
accommodated, but only by one bearing in each direction .The bearing set
 is supplied with an intermediate outer ring spacer. The suffix DF means
 two bearings matched for mounting face-to-face. A number immediately 
following the DF identifies the design of the ring spacer. 
WSBC 31309/DF is widely used in automotive,rolling mill,mining, metallurgy,petroleum machinery and other industries. If you want to know more about WSBC 31309/DF , welcome you contact us freely .

