Patent ID: 6986552

Claim:
An insert for a cutting tool useable in a milling machine for cutting a plurality of parallel grooves in a hard surface, said parallel grooves having ridges between adjacent grooves, said cutting tool having a forward cutting end having a seat and a rearward cylindrical shank receivable in a cylindrical opening in a tool holder, said insert comprising a forward tip having an outer diameter, a mid-section behind said tip, said mid-section having a first diameter defined by said outer diameter of said forward tip and a second diameter rearward of said first diameter, a base axially behind said mid-section, a fillet between said mid-section and said base, said fillet having a maximum outer diameter, said base defining a cylinder having an outer diameter, and a forward surface extending outward of said fillet to said outer diameter of said base, said base having a plurality of radially outwardly extending projections where said projections are separated by indentations, said base, including said projections have nearly vertical side surfaces, said side surfaces forwardly tapering toward an axis of said insert at an angle of three to eight degrees to facilitate removal of said insert from a die used to form said insert.