Patent ID: 7153066

Claim:
A cutting tool, comprising: a shaft holding device having a frontal seat with grooves therein; a cutting plate having a central body and at least one cutting edge projecting radially from said central body; a coupling component defining a longitudinal axis, mounting said cutting plate on said frontal seat of said holding device, having at least one driving surface transferring operating torque from said holding device to said cutting plate and having three ribs with said driving surface, said ribs projecting axially from said central body, enclosing equal central angles relative to one another, extending radially and being complementary to said grooves in said frontal seat; a bore in said cutting plate concentric with said longitudinal axis for receiving a screw to secure said cutting plate to said frontal seat of said holding device; and a structural part on said cutting plate forming a non-interchangeability mechanism with an associated configuration on said frontal seat of said holding device.