Patent ID: 7802944

Claim:
A tool for chip removing machining, comprising: 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, wherein 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 including two external side support surfaces orientated at an angle to each other, wherein the connecting surface of the cutting insert includes a solitary depression that is wider and deeper than the elevation, the depression being surrounded by a frame including at least three banks running at an angle to each other, the at least three banks including internal shoulder surfaces, two of which are pressed against the two side support surfaces of the elevation, and the at least three banks including lower base surfaces situated in a common plane, three of which rest against the bottom surrounding the elevation, and wherein the bottom surrounding the elevation includes the same number of elongate part surfaces as the number of corners of the elevation, three part surfaces of which serve as bottom support surfaces respectively having points in a common plane to afford a three-point support to the cutting insert.