Patent ID: 7264425

Claim:
A cutting insert, comprising a clearance surface and a cutting edge, wherein a shape of the clearance surface is defined relative to an imaginary surface that is substantially frustoconical, the imaginary surface forming a non-zero angle with a perpendicular to a plane of a top surface of the insert, wherein the clearance surface differs from the imaginary surface and forms the non-zero angle with the perpendicular to the plane of the top surface, and wherein a shape of the cutting edge is defined relative to a first imaginary edge disposed above the imaginary surface, all points on the first imaginary edge being disposed at the plane of the top surface, the cutting edge being disposed above the clearance surface, at least some but fewer than all points on the cutting edge being disposed at different distances from the plane of the top surface, a profile of the cutting edge viewed in the direction of the perpendicular to the plane of the top surface corresponding to a profile of the first imaginary edge.