Indexable insert drill
AssigneeThe Valeron Corporation
InventorRaymond T. Zweekly
Life of this patent
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Abstract
An indexable insert drill employing a plurality of inserts located substantially in a single radial plane characterized by a round innermost insert having its arcuate cutting edge extending across the axial center line of the drill. One or more supplemental inserts, preferably square in configuration and including chip interruption notches positioned for positive axial lead, continue the cutting action radially beyond the arcuate center cut of the round insert with an outermost corner adapted to finish cut the side wall diameter of the hole.
Claims22
An indexable insert drill comprising a drill body a pair of insert pockets formed at one end of said body, one of said pockets having means for locating a first round insert having a circular arcuate cutting edge extending with its foremost point offset from the drill axis by a fractional portion of the insert radius, said cutting edge extending from said foremost point substantially through and past said axis.
Dependencies are inferred from the claim text.