SEED Guides Rolling element bearings <
Notation and symbols used in the guide| a1 | life adjustment factor |
| C | dynamic load rating, N |
| Co | static load rating, N |
| e | limit value of Fa/Fr |
| Fa | bearing radial load, N |
| L10 | life of bearing (90% reliability), millions of revs |
| L10a | adjusted bearing life (L10a = a1L10, millions of revs |
| N | shaftspeed, r/min |
| Nv | instantaneous value of varying speed, r/min |
| p | bearing life exponent |
| P | equivalent dynamic bearing load, N |
| Po | equivalent static bearing load, N |
| Pv | varying load, N |
| S | service factor for dynamic loads |
| So | static service factor |
| X | radial load factor |
| Xo | static radial load factor |
| Y | axial load factor |
| Yo | static axial load factor |
| mu | coefficient of friction |