| 摘要 |
PROBLEM TO BE SOLVED: To provide a cutting tool which can efficiently feed fluid to a blade portion even if it has only a very small diameter. SOLUTION: According to the structure of the cutting tool, a shank portion 3 has four cutting fluid channels 7 bored therein in a manner penetrating from a rear end face 6 to a front end face 4. The cutting fluid channels 7 are all formed in parallel with a central axis of the shank portion 3. Then front-side openings 8 of the respective cutting fluid channels 7 are formed in the front end face 4 of the shank portion 3 at locations that make contact with a circumference of a proximal end (a portion making contact with the front end face 4 of the shank portion 3) of the blade portion 2 in a manner being separated at equal intervals. COPYRIGHT: (C)2005,JPO&NCIPI
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