Tool for chip removing machining as well as a basic body and an indexable cutting insert therefor

Abstract

A tool for chip removing machining, including a basic body having a connecting surface included in an insert seat, and an indexable cutting insert mounted in the basic body and having a connecting surface in mechanical engagement with the connecting surface of the basic body, and fixed by a tightening element. The connecting surface of the basic body includes a solitary, polygonal elevation that protrudes from a bottom surrounding the elevation from all sides. The elevation includes two external side support surfaces orientated at an angle to each other. The connecting surface of the cutting insert includes a solitary depression that is wider and deeper than the elevation. The depression is surrounded by a frame in which there are included at least three banks running at an angle to each other and including internal shoulder surfaces, two of which are pressed against the two side support surfaces of the elevation, and lower base surfaces, which are situated in a common plane, three of which rest against the bottom. In addition, the invention relates to a basic body and a cutting insert as such.