Patent ID: 7513717

Claim:
A positive face milling insert, comprising: a top side serving as a chip surface, a bottom side, a number of clearance surfaces therebetween, and a pair of chip-removing main cutting edges which are spaced apart from a center of the insert and meet at a corner where they transform into a surface wiping secondary edge, which is intersected by a bisector defining said corner between the main cutting edges, a rake surface along each main cutting edge sloping towards a countersunk bottom surface, and each clearance surface forming an acute angle with the top side so as to give the insert its positive geometry, wherein a shoulder, having a certain thickness, protrudes from the bottom surface and rake surface, said shoulder having a top surface which extends inwardly from the secondary edge along the bisector and transforms into each rake surface via a leaning side transition surface providing the level difference between said top and rake surfaces and forming a termination of the rake surface.