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.

原车床主支撑滑动承瓦严重磨损,加降低,故改用滚动承支撑。

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.

超硬态滚动承表面形成的残余压应力,经作应力衰减后才成为影响滚动接触疲劳寿命的应力状态。