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.

超精硬态切削在滚轴承表面形成的残余压,工作衰减才成为影响滚疲劳寿命的状态。

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.

原车床主轴支撑滑轴承轴瓦严重磨损,加工精度降低,故改用滚轴承支撑。