| 摘要 |
PROBLEM TO BE SOLVED: To provide a tube material drilling tool capable of drilling a tube material without deforming the tube material.SOLUTION: A tube material drilling tool includes a supporting body for supporting a tube material, and a drilling blade which is movably mounted on the supporting body, wherein the drilling blade can be inserted in the tube material supported by the supporting body. The supporting body has a pair of supporting pieces for supporting the tube material, and a supporting face to be positioned between the supporting pieces so as to be opposite to the tube material supported by the pair of supporting pieces. The drilling blade is mounted on the supporting body movably from one supporting piece toward the other supporting piece. A side-view pointed blade tip is provided on the drilling blade while a face opposite to the other supporting piece is inclined from a fore end to a base end side. An inclined surface constituting the blade tip is positioned to face the supporting face. |
