| 摘要 |
PROBLEM TO BE SOLVED: To provide a dust-collecting type boring drill in which a drill section can be attached to/detached from a drill body.SOLUTION: A boring drill includes a drill body, a drill section provided at the tip of the drill body, and a dust collection hole extending in a rotation axis direction of the drill body from the tip of the drill section. The drill body is equipped with a mounting part formed in a tapered shape where a diameter of the drill body decreases toward the tip where the drill section is provided. A mounting hole having a contact face aligning with a diameter of a tapered peripheral surface of the mounting part is formed on the drill section, and the drill section is provided to be detachable from the drill body. |
