| 摘要 |
PURPOSE: An indexable drill is provided to prevent the insert from being vibrated relatively to a drill body when drilling by fixing an insert mounted on a mounting groove through a bolt. CONSTITUTION: An indexable drill comprises a drill body(100), a bolt(130) and an insert(200). The drill body comprises a head unit(110), a body unit(160) and a flute groove(150). The flute groove is shaped to a reduced width to the first. A boring area portion is secured in the side end of the outer circumference of the head unit. A bolt hole(112) is punched in the boring area portion. The bolt hole vertically crosses the center line of the insert. The bolt is inserted in the bolt hole of one head unit and is coupled through the hole(210) of the insert body portion in the bolt hole of the opposite side head unit.
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