SUS bars such as 304, 316 series have been widely used to manufacture the adapters and fittings, which include many hexagonal bolts and nuts. The purpose of this study is to investigate the characteristics of heat conduction of SUS bar according to rotation of cutting tool. Temperature distribution in SUS bar can be achieved by using numerical analysis of heat conduction, thus it may be of help to the optimal operation of peeling machine. As the results, as the rotation of cutting tool is increased, both maximum cutting temperature and depth of heat conduction are decreased. Moreover as the angle of SUS bar is increased, it shows that maximum cutting temperature is decreased, on the other hand, depth of heat conduction is increased.