Eight edge positive chip control insert

An improved cutting tool comprising in combination:

• a tool holder having a square insert-receiving pocket formed in one end thereof;
• a cutter insert adapted to be received within said pocket;
• and
• clamp means for releasably securing said insert in said pocket of said holder,
• said insert comprising:
• a generally rectangular prismatic element of cutting material, said element having a pair of parallel, laterally offset primary faces, and four rectangular side faces each outwardly bounded by a respective side reference plane extending perpendicular of said primary faces and the adjacent side reference planes,
• each of said side faces having an opposed pair of recessed, beveled facets formed therein, each said facet intersecting a respective primary face to form a cutting edge extending parallel to the side reference plane of the side face containing the said facet,
• each facet being inwardly inclined away from its respective cutting edge to define a shear angle measured from an edge said side reference plane,
• said side faces each having a diametrically opposed pair of flat lands substantially coplanar with a respective side reference plane whereby to define a planar base on each side face permitting said cutter to be accurately located, and securely clamped, in said square pocket.