Patents Assigned to Sakai Threading Tool Co., Ltd.
  • Rotary cutting tool and method for manufacturing such a rotary cutting tool
    Patent number: 8215881
    Abstract: A rotary cutting tool is provided which is less likely to cause chips to get stuck, and which can be manufactured at a low cost. The rotary cutting tool includes a body having a relief surface (6) and a rake face (7) which is connected to the relief surface (6). An oxide film (9) is formed on the rake face (7) by oxidizing the surface of the body, and a hard film (8) is formed on the relief surface (6) and the oxide film (9), The hard film (8) is made of a metal carbide, a metal nitride, a metal carbonitride, or a solid solution thereof.
    Type: Grant
    Filed: January 15, 2007
    Date of Patent: July 10, 2012
    Assignee: Sakai Threading Tool Co., Ltd.
    Inventor: Hitoshi Yamaguchi