Patent ID: 7607868

Claim:
A material removal tool, comprising: a body with a plurality of insert pockets at a first axial end, each of the plurality of insert pockets including a wall supporting surface, a floor supporting surface and a threaded tap hole with a counterbore, the threaded tap hole having a centerline oriented at an angle to the floor supporting surface; an indexable insert including a front polygonal surface, a back polygonal surface and a plurality of side edge surfaces joining the front polygonal surface and the back polygonal surface, the intersections of the side edge surfaces and the polygonal surfaces defining line edges of the insert and intersections of sequential side edge surfaces defining corner edges of the insert, and including a receiver for a region of a head of a locking screw in the front polygonal surface, wherein the receiver includes a plurality of recesses, and wherein the indexable insert is seated in the insert pocket with the back polygonal surface contacting the floor supporting surface, with a first one of the plurality of side edge surfaces contacting the wall supporting surface, and with a second one of the plurality of side edge surfaces protruding radially past an outer peripheral surface of the body; and a locking screw for the threaded tap hole, the locking screw including a threaded portion, a concentric shoulder and an angular shoulder, the angular shoulder between the threaded portion and the concentric shoulder, wherein the locking screw inserted into the threaded tap hole engages a first region of the concentric shoulder and a first region of the angular shoulder against one of the plurality of recesses.