Abstract
In the turning process, the cutting-off is one of the difficult works. There are some unsteady phenomenon as built-up edge and chatter vibration because the cutting velocity is changed during cutting-off from the outside of the work to the center. So the skilled machinists of cutting-off control the depth of cut according as the cutting force, the cutting image and the cutting sound information. In this report, the relationships between cutting force and depth of cut are discussed both the hand-operated cutting and the cutting of auto-feed of depth.
