| 摘要 |
Described is a drill bit (1), in particulare a bit for a percussion or rotary-percussion drill, the tip of the bit having cutting edges (3, 4) designed to detach and/or break up the material to be removed, at least one cutting edge (4) running in a curve radially across the face (2) of the bit. The invention calls for at least one additional, straight, cutting edge (3) located on the convex side of the curved cutting edge (4). |
