Cutter tool attachment for milling machines particularly useful to enable cutting sharp (or rounded) interior corners

Abstract

A cutter tool for a milling machine head, includes a conical cutter member defining a cone angle of substantially 70°. In one embodiment, the conical cutter member has a pointed apex, and in another embodiment, it has a rounded apex. Also described is an attachment for a milling machine head, wherein the conical cutter member is coupled at an angle of substantially 55° with respect to the axis of the milling machine head.

What is claimed is:  
     
         1 . An attachment for a milling machine head, comprising a cutter tool having a conical cutter member defining a cone angle of substantially 70°.  
     
     
         2 . The attachment according to  claim 1 , wherein said conical cutter member has a pointed apex.  
     
     
         3 . The attachment according to  claim 1 , wherein said conical cutter member has a rounded apex.  
     
     
         4 . The attachment according to  claim 1 , wherein said attachment further comprises: 
 a shaft attachable to the milling machine head coaxial with the longitudinal axis of the milling machine head; and    a coupling the cutter tool to said shaft with the rotary axis in the conical cutter member at a predetermined angle with respect to the longitudinal axis of the shaft.    
     
     
         5 . The combination according to  claim 4 , wherein said predetermined angle is substantially 55°.  
     
     
         6 . The combination according to  claim 4 , wherein said coupling includes meshing bevel gears.