Indexable threading and turning insert with pressed-in chip breakers

Abstract

An indexable threading and turning insert with integral press-in chip breakers, having a threading insert portion and a turning insert portion. Each of the threading insert portion and the turning insert portion has, respectively, an integral pressed-in chip breaker having ideal chip management characteristics. The indexable threading and turning insert has a substantially diamond shape having a first planar face, an opposite second planar face, and four insert faces extending between the first and second planar faces. The threading insert portion is characterized by a first cutting edge formed at the intersection of the first insert face and a first land and a second cutting edge formed at the intersection of the second insert face and a second land. The first and second cutting edges have a plurality of noses separated by gullets. First and second integral, pressed-in chip breakers, each in the form of a raised island, the incident face contour thereof corresponding to the nose-and-gullet contour of the respective cutting edge adjacent thereto. The turning insert portion is characterized by third and fourth cutting edges located, respectively, at the intersection of a third land with the third and fourth insert faces, and at the intersection of a fourth land with the third and fourth insert faces. Third and fourth integral, pressed-in chip breakers, each in the form of a raised island corresponding to the contour of the respective cutting edge adjacent thereto.