| 摘要 |
PROBLEM TO BE SOLVED: To provide a drilling tool less likely to break.SOLUTION: A drilling tool 1 comprises: a clamping shaft 2 for mounting the drilling tool 1 in a machine tool; and a drill shaft 3 with a nominal diameter DN, the drill shaft 3 leading to the clamping shaft 2. The clamping shaft 2 and drill shaft 3 extend along a common central axis M, and the drill shaft 3 has a shape of a twist drill with at least one main cutting blade 4, which is limited radially by a cutting edge 5, and at least one spiral groove 6 with a chamfer 7. Furthermore, the drill shaft 3 comprises at least one element 8, 9, which promotes the carrying away of chips from the drill shaft 3, in particular the main cutting blade 4 and/or in the spiral groove 6. |
