平均寿命（Life Expectancy）
在指定恒温下持续工作后，经检验，90%能正常运转即可估算其平均使用寿命（The continuous duty life at given temperature after which,90% of testing units shall still be running）。
|
Bearing System |
Test Temperature |
Test time |
|
Twoball Bearing |
25℃ |
50000 |
|
Twoball Bearing |
40℃ |
42000 |
|
Twoball Bearing |
60℃ |
30000 |
