Geometry of Turning Tools

Turning is the process of producing the required profiles on the cylindrical jobs. In this process the cutting tool is fed against a rotating job.

All cutting tools used in lathes are single point tools, i.e., having only a single cutting edge at one end. The cutting edge is formed at the end of a solid tool, its body (shank) is made long enough so that it can be gripped directly in the tool post. Alternatively, the cutting edge may be formed on the edge of a small bit, which is held in a tool 'holder' or 'brazed' on a solid shank of a cheaper metal. The shape of the cutting edge varies according to the operation to be performed.