Patent ID: 6929426

Claim:
In combination: a holder having a longitudinally extending bore therein and a stop supported therein; a cutting insert having a longitudinal axis and a shank portion, the shank portion being insertable into the bore and having a plurality of locating grooves at one extremity thereof that intersect the longitudinal axis of the cutting insert, wherein the cutting insert, when inserted into the bore, mates with the stop by way of one of the grooves to form a positive stop in one of a plurality of positions; a threaded member disposed in a threaded aperture in the holder angularly with respect to the longitudinal axis of the bore; and an annular relief in an outer surface of the shank portion of the holder, the threaded member being adapted to be threaded toward the relief to exert a pressure against the shank portion of the cutting insert to drive the shank portion firmly into engagement with the stop and lock the shank portion in place.