| 摘要 |
PROBLEM TO BE SOLVED: To secure strength of a cutting edge and to reduce cutting resistance in a cutting edge part installed on a cutting edge part replacing type cutting tool. SOLUTION: Outer circumference cutting edges 12, 12 twisting around an axial line O and bottom cutting edges 13, 13 continuing to tip sides of the outer circumference edges 12, 12 are formed on a tip side part 11 of the cutting edge part 10 detachably attached on a cutting edge replacing type cutting tool. An outer circumference cutting edge cutting surface 15A and a bottom cutting edge cutting surface 15B are formed in wall surfaces continuing to the outer circumference cutting edge 12 and the bottom cutting edge 13 of a main groove 15 continuously formed along the outer circumference cutting edge 12 and the bottom cutting edge 13. COPYRIGHT: (C)2004,JPO
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