Cutting bit for machine tool, has concave blades provided in edge regions where first and lateral surfaces of bit meet

摘要

The cutting bit (2) has at least one blade (11-14) in the edge region (24) where a first surface (20) and at least one lateral surface (23) of the bit meet. Each blade has a concave curved shape with respect to the bit rotation axis (A). The degree curvature for each blade increases in a strictly monotonous manner in a given direction around the bit rotation axis.