| 摘要 |
PROBLEM TO BE SOLVED: To provide a cylindrical boring tool capable of efficiently boring a workpiece formed of a relatively soft material. SOLUTION: This cylindrical boring tool having a shank section and a cylindrical tool body having a cutting edge part at the tip edge is provided with a presser member provided in a relatively rotatable manner coaxially with the shank section or the cylindrical tool body, in a state of being energized in a tip direction by an elastic body, and having a predetermined outer diameter smaller than the inner diameter of the cutting edge part of the cylindrical tool body. Since the presser member is normally energized by the elastic body, at least the tip part of the presser member is projected in the tip direction from the cylindrical tool body. COPYRIGHT: (C)2005,JPO&NCIPI
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