| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotary tool with less manufacturing labor, which feeds coolant to a blade tip at high efficiency. SOLUTION: A drill 1 is a rotary tool of such a type that a water feeding path 9 for introducing grinding water fed to a blade tip 3a is located at a center of a shank 5 along a rotary axial line A. This drill 1 comprises: a guide part 25 installed on an outer periphery of the shank 5 and guiding the grinding water to fluidize it toward the blade tip 3a; and a communication flow path 13 installed in the shank 5 and communicating the water feeding path 9 and the guiding part 25. COPYRIGHT: (C)2008,JPO&INPIT
|
