| 摘要 |
PROBLEM TO BE SOLVED: To decrease the weight of a hole machining tool to which a function injecting fluid such as coolant and air for improving a chip discharging property is added, without deterioration in a fluid injecting function or increase in cost, and to improve performance in large diameter deep hole machining, attaching/detaching property of a tool, and safety in attaching/detaching work. SOLUTION: A hole 5 (a hollow portion) is provided at a center portion of a tool body 1, and a lightweight component 6 formed by a hollow cylindrical element is inserted in the hole 5. A fluid supplying passage 7 communicating fluid injecting holes 10, 11 to a fluid introducing port 9 is provided between the lightweight component 6 and the tool body 1. COPYRIGHT: (C)2006,JPO&NCIPI
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