Patent ID: 6086160
Filing Date: 2000-07-11
Classification: B28D,E21C

Abstract:
A toolholder for milling drums of scarifying machines including a body defining a longitudinal axis, at one end provided with a housing for housing a milling tool, said toolholder having a truncated-cone shaped base with a lateral external surface having an inclination converging toward the end opposite to the end housing said tool, said toolholder for removably housing said milling tool in a respective truncated-cone shaped hole in a support unit belonging to an external lateral surface of said milling drum, said body of said toolholder including a plane surface parallel to the longitudinal axis of said toolholder along its length, wherein the body of said tool holder has an external annular groove projecting from said support unit and reducing the resisting section of said toolholder in order to define a pre-set breaking area, said annular groove is included between an annular collar and an annular projection both projecting radially from the body of said toolholder and both formed above a larger base of said truncated-cone shaped base.