| 摘要 |
PROBLEM TO BE SOLVED: To provide an end mill having a small-diameter part at the tip of a shank and forming a cutting blade by base material brazed to the small-diameter part, which is improved in strength of the small-diameter end mill by restraining the influence of vibration generated in machining. SOLUTION: In this end mill 1, the shank part 2 and a neck part 3 having a smaller diameter than the shank part are integrally formed of cemented carbide, base material 4 obtained by integrally sintering a layer 5 made of CBN or diamond and a backing cemented carbide layer 6 is bonded to the tip of the neck part 3 by brazing the backing cemented carbide layer 5, and a cutting blade 7 is formed of the CBN or diamond layer 5 of the base material 4. COPYRIGHT: (C)2007,JPO&INPIT
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