Patent ID: 9289834
Filing Date: 2016-03-22
CPC Classification: B23C,Y10T

Claim Text:
1. A cutting tool, comprising: a tool body having at least one pocket; and at least one double-sided cutting insert releasibly fixed to the pocket by a clamping screw, the cutting insert comprising: a circular top surface, a bottom surface shaped to be identical to the top surface, a cylindrical side surface for connecting the top and bottom surfaces, a mounting bore passing between the top surface and the bottom surface, and cutting edges formed between the top and side surfaces and between the bottom and side surfaces; wherein the side surface of the cutting insert has a plurality of rotation prevention surfaces substantially perpendicular to the top and bottom surfaces, each rotation prevention surface being recessed radially inwardly from the cylindrical side surface of the cutting insert, having a thickness measured in a first height direction extending between the top surface and the bottom surface, and having a width measured in a first width direction perpendicular to the first height direction; wherein each rotation prevention surface has a pair of edges which exist inside a circumference of the cylindrical side surface and extend in upper and lower directions between the top and bottom surfaces; wherein each rotation prevention surface is symmetrically formed in said upper and lower directions; wherein the pocket of the tool body comprises: wherein a protruding surface is formed in the pocket side surface for being mated with one of the rotation prevention surfaces of the cutting insert to prevent the rotation of the cutting insert, the protruding surface having a thickness measured in a second height direction perpendicular to the pocket bottom surface, and a width measured in a second width direction perpendicular to the second height direction, wherein the clamping screw is configured to pass through the mounting bore via the cutting insert's exposed top surface, to thereby releasibly fix the insert to the pocket after the cutting insert is seated in the pocket.