Patent ID: 6257807
Filing Date: 2001-07-10
Classification: B23B,B23C,Y10T

Abstract:
A cutting insert for drilling, comprising a generally rhomboidal body having a cutting face on one side of said body, a support face on an opposite side of said body, a pair of opposing jutting cutting edges and a pair of opposing indented cutting edges bounding said cutting face and defining two diagonally opposite generally acute-angle cutting corners and two diagonally opposite generally obtuse-angle cutting corners, and respective rake faces extending between said cutting edges and said support face, said jutting cutting edges each being formed by two first cutting edge segments defining an outwardly projecting V shape and including an obtuse angle .epsilon..sub.1 from 140.degree. to less than 180.degree., said indented cutting edges each being formed by a plurality of second cutting edge segments including two inwardly converging segments defining an inwardly directed V-shaped indentation and including an angle .epsilon..sub.2 from greater than 180.degree. to 230.degree..