Indexable insert and use of the indexable insert in a solid drill

摘要

The invention relates to an indexable insert for solid drills with four similar, spaced above a support base (42), extending between each two cutting corners (28 ', 28' ') extending cutting edges (30). The cutting edges are limited by including a wedge angle (beta) by a respective rake face (46) and a free surface (48). Of the cutting edges (30) is located during drilling each one in an active position. In order to allow an optimal adaptation to the varying cutting conditions and drilling properties over the cutting edge length of the drilling tool, it is proposed according to the invention that the height (h) of the four cutting edges (30) and / or the clearance angles measured from the plane of the support floor (42) (alpha) varies over the length of the respective cutting edges (30).