L10 is the basic rating life in millions of
revolutions with 10% failure probability (90% reliability). Ln
is the basic rating life in millions of revolutions with n%
failure probability. The ration between Ln and L10
is called the life adjustment factor or reliability factor a1.
Life adjustment factor Ln=a1·L10
| Ln |
10 |
5 |
4 |
3 |
2 |
1 |
| a1 |
1 |
0.62 |
0.53 |
0.44 |
0.33 |
0.21 |
SKF bearing calculator for Rolling bearings basic rating
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