Patent ID: 6234724
Filing Date: 2001-05-22
Classification: B23C,Y10T

Abstract:
A tool holder for alternately receiving a first cutting insert indexable in exactly n rotational positions and a second cutting insert indexable in m.times.n rotational positions, for at least one value of each of n and m where n.gtoreq.3 and m.gtoreq.2, the tool holder comprising at least one insert receiving pocket defined with reference to an axis passing through said pocket with which a central axis of the cutting inserts is to be aligned, said pocket having:(a) a base for supporting the cutting inserts;(b) first, second and third lateral support surfaces angularly spaced around, and substantially equidistant from, said axis;(c) a first lateral hollow located between said first and second lateral support surfaces; and(d) a second lateral hollow located between said second and third lateral support surfaces,wherein said first and second lateral hollows are formed such that, when one of the cutting inserts is mounted within said insert receiving pocket in a first position said first and second lateral support surfaces abut first and second portions of the cutting insert, respectively, and when the insert is rotated through 360.degree./(m.times.n) about said axis, the first and second portions of the insert lie within said first and second lateral hollows, respectively.