Abstract: A cutting insert is mounted in a pocket of a holder so that rotation of an adjustment member mounted in the holder produces rotation of the insert about a center axis. The insert includes top and bottom surfaces interconnected by a side surface. The side surface includes a curved portion engaging side support surfaces of the holder, a pair of planar surfaces extending from respective ends of the curved portion, and a portion extending from one of the planar surfaces to define a parallel land. The curved portion engages the adjustment member so that rotation of the latter produces a fine adjustment of the parallel land.

Abstract: A milling cutter head intended for metal machining, particularly aluminum, comprises grooves in which are mounted cutting insert-carrying cartridges and spacer plates. The sides of the cartridge and the spacer plate that are in contact are serrated in the same direction. The other side of the spacer plate and the side surface of the groove being in contact with it are serrated in a direction which is substantially perpendicular to the first mentioned serration. In this way, it is possible to independently and precisely adjust each of the axial and radial directions of the cutting edge.