Patent ID: 6200078
Filing Date: 2001-03-13
Classification: B23B,B23C,B23D,B23G,Y10S,Y10T

Abstract:
A complex cutting-blade tool comprising:a hole-opening cutting blade;a neck, in back of said hole-opening cutting blade, having an outer diameter smaller than an outer diameter of said hole-opening cutting blade;a hole exit burr removal and beveling cutting blade provided at a place of connection between said hole-opening cutting blade and said neck at an angle of inclination of 45.degree. or an angle near thereto with respect to a tool center axis;a fixture, mounted on said neck, having a securing device to secure said fixture to said neck at any position in a length dimension thereof and to release that securing; anda hole entrance beveling cutting blade mounted on said fixture at an angle of inclination of 45.degree. or an angle near thereto with respect to a tool center axis in a direction opposite to inclination of said hole exit burr removal and beveling cutting blade.