Patent ID: 7575400

Claim:
A drilling tool having a basic body rotatable about a drill axis, having two insert seats arranged in the point region of the basic body, and having interchangeable inserts which are interchangeably inserted into the insert seats, face one another at a central insert corner over the drill axis while leaving a center gap clear, and have a main cutting edge, extending from a radially outer guide bevel up to the central insert corner, and a respective rake face and flank which meet in the region of the main cutting edge while forming a cutting wedge, the main cutting edges of the interchangeable inserts complementing one another in the region of a central, angled cutting-edge part to form a chisel edge interrupted by the center gap, the interchangeable inserts, at their flank, having an inclined deflecting chamfer running from an apex line, starting from the region of their central cutting-edge part, up to the central insert corner, the flanks being inclined positively in the feed direction in the radially outer region in such a way as to complement one another in an arrow-like manner and negatively in the feed direction toward the center gap in the region of their deflecting chamfers in such a way as to complement one another in a funnel-like manner, the interchangeable inserts having a locating surface remote from the flank and a through-opening, passing through the flank and the locating surface, for a fastening element, and the deflecting chamfer being inclined in the direction of the respective locating surface, wherein the apex line starts from a position within the central cutting-edge part and runs to an opposite insert edge, the central cutting-edge part and the opposite insert edge meeting in the central insert corner, and wherein the basic body, in the region of the center gap between the insert seats, has a concave contour which is axially set back relative to the insert seats.