Patent ID: 8308402

Claim:
A drill body for chip removing machining, comprising: an envelope surface which is concentric with a center axis around which the drill body is rotatable, and transforms into a front end surface; and a front cutting edge adjacent to a chip flute which is countersunk in the envelope surface in the area in front of the cutting edge as viewed in the direction of rotation of the drill body and runs out into the front end surface, wherein, in the front part of the chip flute rearward of the front end surface, a depression is formed without interfering with the front cutting edge, which includes two part surfaces extending at an obtuse angle (α) to each other, one of which forms a bottom surface in the depression, and the other of which faces the cutting edge and is in front of the cutting edge as viewed in the direction of rotation to form a stop face for a chip removed by the cutting edge, wherein the chip flute is helicoidal and delimited by a cross-sectionally concave limiting surface to which the depression is delimited via a curved borderline, wherein the concave limiting surface includes two halves facing each other, one of the two halves ending into the front cutting edge, and wherein the depression extends into the one of the two halves ending into the front cutting edge.