Cutter for hole punching tools

摘要

The cutter is intended for hole punching tools which comprise a hollow cylindrical bush serving as a die and accommodating a punch provided with such an annular cutter at its end. The tooth-like cutting elements (3) are shaped as parts of conical surface forming an angle of inclination alpha and an obtuse angle with the cylindrical surface (6). The hollows between individual cutting elements form a positive acute cutting angles with the surface (6).