| 摘要 |
PROBLEM TO BE SOLVED: To provide a cutting tool which is constituted by forming recessed parts opened on both side faces of a tool main body in an outer peripheral part of the tool main body and mounting an insert having a cutting edge on mounting seats provided in these recessed parts detachably, and supplies coolant into the insert requiring supply of a sufficient amount of coolant securely and efficiently. SOLUTION: The cutting tool 1 is constituted by forming the recessed parts opened on both side faces of the tool main body in the outer peripheral part of the tool main body rotating around an axial line O, and by mounting the insert having the cutting edge in the recessed parts detachably. The tool main body is provided with a coolant supply passage for supplying coolant to the cutting edge, and the coolant supply passage is formed in such a way that at least a part of the coolant supply passage is extended toward the outer periphery from the inner periphery of the tool main body, and its outer peripheral side is positioned on a back side in the direction T of rotation of the tool more than its inner peripheral side. COPYRIGHT: (C)2008,JPO&INPIT
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