Specifications of SKF Bearing 31311
| Dimension series | 7FB |
Dimensions
| d | 55.0mm | Bore diameter |
| D | 120.0mm | Outside diameter |
| T | 31.5mm | Total width |
| d1 | 88.4mm | Shoulder diameter of inner ring |
| B | 29.0mm | Width of inner ring |
| C | 21.0mm | Width of outer ring |
| r1,2 | 2.5mm | Chamfer dimension of inner ring |
| r3,4 | 2.0mm | Chamfer dimension of outer ring |
| a | 37.064mm | Distance side face to pressure point |
Abutment dimensions
| da | 68.0mm | Diameter of shaft abutment |
| db | 66.5mm | Diameter of shaft abutment |
| Da | 94.0mm | Diameter of housing abutment |
| Da | 111.0mm | Diameter of housing abutment |
| Db | 113.0mm | Diameter of housing abutment |
| Ca | 4.0mm | Minimum width of space required in housing on large side face |
| Cb | 10.5mm | Minimum width of space required in housing on small side face |
| ra | 2.5mm | Radius of shaft fillet |
| rb | 2.0mm | Radius of housing fillet |
Calculation data
| Basic dynamic load rating | C | 149.0kN |
| Basic static load rating | C0 | 137.0kN |
| Fatigue load limit | Pu | 16.6kN |
| Reference speed | 4300.0r/min | |
| Limiting speed | 5600.0r/min | |
| Limiting value | e | 0.83 |
| Axial load factor | Y | 0.72 |
| Axial load factor | Y0 | 0.4 |
Mass
| Mass | 1.54kg |
