Machine tool assembly with rotatable cutting tool

Claim 1

A machine tool assembly having a generally centrally located longitudinal axis about which said assembly is rotated to perform a cutting operation including a shaft member having a cutter head assembly at an end thereof, said cutter head assembly comprising: a pair of juxtaposed jaws defining a slot therebetween; a rotatable cutter plate mounted in said slot between said jaws, said cutter plate including transverse groove means provided at the periphery thereof; a clamping bolt extending through said cutter plate having a head abutting against an annular shoulder of a bore of one of said jaws and threads engaging into the other of said jaws; a T-shaped insert having a pair of arms and a leg inserted into said slot; an axial bore formed in said shaft member receiving therein said leg of said T-shaped insert with said arms thereof being located in said slot; and a pair of axially symmetrically constructed slanted abutment surfaces formed on said arms of said T-shaped insert and a protuberance formed on said arms of said T-shaped insert arranged to engage into said transverse groove means of said cutter plate to rotatively lock said cutter place in place; said protuberance and said transverse groove means receiving said protuberance being arranged laterally offset so as to be located completely outside of the path of said longitudinal axis.