Cutting insert and drilling tool for drilling in solid materials

摘要

PCT No. PCT/DE92/00562 Sec. 371 Date Jan. 31, 1994 Sec. 102(e) Date Jan. 31, 1994 PCT Filed Jul. 7, 1992 PCT Pub. No. WO93/02824 PCT Pub. Date Feb. 18, 1993.A drill having at least one and generally at least two cutting inserts fixed in a cutting end of the drill and in which each cutting insert is a polygonal body having at least three cutting vertices and respective cutting edges between the vertices which are set back so that cutting points are formed close to a vertex. The partial cutting edges formed by the setback extend rectilinearly to the cutting points and include an angle of up to 170 DEG between them.