Patent ID: 9662719
Date: 2017-05-30
CPC Classifications: B23B,Y10T

Claim:
1. A drill bit which extends along a center axis in an axial direction comprising: main cutting edges which are connected to one another by a transverse cutting edge; a chip flute associated with each main cutting edge; a tool flank adjoining each of the main cutting edges, wherein each tool flank respectively merges into one of the chip flutes; a recessed point thinning in the region of the transverse cutting edge; and a drill back which extends peripherally between two chip flutes; wherein the point thinning, along a principal direction, extends from the tool flank and descends into the chip flute via an edge-free convex course; wherein the principal direction is defined as a radial direction with respect to the center axis and is roughly parallel to at least one of the main cutting edges.