Guideline values of requisite basic rating life L10h for Y-bearings and Y-bearing units
| Machine type | Requisite basic rating life L10h |
| Operating hours | |
| Machines used for short periods or intermittently | |
| Agricultural and ancillary transport equipment | 1 000 ... 2 000 |
| Other agricultural equipment | 4 000 ... 8 000 |
| Machines for use 8 hours a day, but not always fully utilized | |
| Belt conveyors | 12 000 ... 20 000 |
| Machines for use 8 hours a day and fully utilized | |
| Light duty fans, textile machinery | 20 000 ... 30 000
|
