In order to prevent the reduction of the working accuracy of S1-280 Type Lathe that is made from overwear of main shaft bush bearing, it is substituted with rolling bearing.

原车床主支撑滑动严重磨损,加工精度降低,故改用滚动支撑。

The residual stress formed on the surface of rolling bearing in superfinish hard turning will influence the fatigue life of rolling contacting after stress decay.

超精硬态切削在滚动表的残余压应力,经工作应力衰减后才为影响滚动接触疲劳寿命的应力状态。