| 摘要 |
PURPOSE: An end mill is provided to machine different kinds of materials because two types of tooth for soft and hard materials are installed in a single cutting part. CONSTITUTION: An end mill(100) comprises a cutting part(120) and first and second flutes(161,162). The cutting part includes a first tooth(131) and a second tooth(132) which are alternately formed in one side of a shank(110). The first and second flutes are arranged between the first and second tooth and guides the discharge of chips. The first tooth has a first tilt angle, a first relief angle, and a first inscription angle. The second tooth has a second tilt angle, a second relief angle, and a second inscription angle. The first and second tilt angles are different from each other, or the first and second relief angles are different from each other.
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