| 摘要 |
The invention relates to a drilling tool (2) with at least one main cutting edge (4), which is broken by grinding a protective chamfer (8), and to a method for making a protective chamfer (8) on the main cutting edge (4). According to the invention, the size and/or the position and/or the geometry of the protective chamfer (8) varies over the length of the cutting edge (14). |
