US Patent 11834909 Cutter insert for a section milling tool

A cutting insert having an insert body with an upper surface. The upper surface of the insert body has an exterior cutting surface having an exterior cutting edge and an interior cutting surface having an interior cutting edge. The exterior cutting surface extends peripherally around and is coplanar with the upper surface of the insert body. The interior cutting surface is also coplanar with the upper surface of the insert body and is positioned within and is concentric with the exterior cutting surface. An exterior chip break separates the exterior cutting surface from the interior cutting surface.