One blade opposes negative cutting of eight files for its insertion in a tool support (Machine-translation by Google Translate, not legally binding)

摘要

An eight-edged negative cut insert blade for insertion into a tool holder having a square compartment, said blade having parallel and spaced primary faces, said primary faces being provided with a square configuration, connecting a side face of the parallel edges of such square primary faces, an elongated negative cutting edge formed in said primary faces for each corner of such primary faces, each of said cutting edges being placed behind the edge of a primary face, alternating the cutting edges in the other primary face, and a hole extending in the center of said primary faces completely through the cutting cutting blade, whereby it can be indicated successively to present eight separate cutting edges to a workpiece. (Machine-translation by Google Translate, not legally binding)