Patent ID: 8911183
Filing Date: 2014-12-16
Classification: B23B,Y10T

Abstract:
1. A cutting insert for a drill, comprising: an upper face comprising a first corner portion, and a first side and a second side respectively disposed on both sides of the first corner portion; a bottom face corresponding to the upper face; a side face located between the upper face and the bottom face; a first cutting edge formed along the first side; and a second cutting edge formed along the second side, wherein the side face comprises a first region which is connected to the first cutting edge, a second region which is connected to the second cutting edge, and a third region corresponding to the first corner portion, the third region comprises an upper region which is adjacent to the first corner portion and is disposed toward the upper face, and a lower region located below the upper region and connected to the upper region, and an inclination angle θ the inclination angle θ an inclination angle θ the inclination angle θ