Patent ID: 6935815
Filing Date: 2005-08-30
Classification: B23C,Y10T

Abstract:
1. A cutting insert formed with: a central planar support face; at least three cutting edges spaced outwardly from and around the support face and forming corners; and a land extending along each cutting edge between the respective corners, projecting from the respective cutting edge inward toward the support face, and constituted by a central region of a relatively great width measured perpendicular to the respective cutting edge and a pair of side regions flanking the central region and each of a relatively narrow width, the great width being equal to between 1.5 and 4 times the narrow width, the land forming with a plane of the support face an outwardly open negative land angle of at least 0°, each central region having measured parallel to the respective cutting edge a length equal to between one-third and one-half of a length of the respective cutting edge.