| 摘要 |
PROBLEM TO BE SOLVED: To provide a long service life cutting tool causing little chipping and abrasion by realizing superior work surface roughness even in extremely small inner diameter work, and an inner diameter working method using this cutting tool. SOLUTION: This cutting tool 1 is formed by installing the rear end side of a tip 2 in a tool holder 3 for performing cutting by a cutting edge 5 formed in a tip projecting part 4 of the tip 2, by projecting the tip of a throw-away tip 2 composed of a sintered alloy including iron group metal at a rate of 5 mass% or more from the tip of the tool holder 3. The cutting tool comprises an electromagnetic coil 8 for magnetizing and demagnetizing the tip 2 on the tip side from a holder restricting part 6 in the tool holder 3. COPYRIGHT: (C)2005,JPO&NCIPI
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