Drill bit

摘要

The drill bit (1) has a smaller radial extension portion provided with a first cutting edge (3) extending over entire drill bit diameter. The first cutting edge is arranged along an outer circumference of an end surface (2). A second cutting edge (5) protruding from the first cutting edge is located in a region of the end surface and is tilted in the region of a drill bit shaft (4) such that an acute angle is formed between the first cutting edge and a rotational axis (6).