Patent ID: 8882402

Claim:
An anti-rotation mounting mechanism between a round cutting insert and an insert-receiving pocket of a tool body, said insert including an upper surface that terminates in a cutting edge, a lower surface, and a side surface between said upper and lower surfaces, the mechanism comprising: a plurality of curved stop surfaces disposed around the side surface of the cutting insert; and an anti-rotation surface on the insert-receiving pocket of the tool body for engaging the stop surfaces to form an interference joint, the anti-rotation surface including a pair of curved engagement portions separated by a planar central portion, wherein the pair of curved engagement portions engage the curved stop surfaces of the cutting insert when the cutting insert is mounted in the insert-receiving pocket, and wherein the planar central portion does not engage the curved stop surfaces of the cutting insert when the cutting insert is mounted in the insert-receiving pocket, and wherein the planar central portion allows the anti-rotation surface of the pocket to move radially inward with respect to the cutting insert, resulting in an arc length of rotation to be shortened, thereby allowing an amount of clocking of the cutting insert to be selectively adjusted when the cutting insert is mounted in the insert-receiving pocket.