Patent ID: 6164728
Filing Date: 2000-12-26
Classification: E21C

Abstract:
A tool mounting for receiving a tool comprisinga tool mounting block having a forward surface and an attachment portion, said attachment portion for attachment to a machine,said tool mounting block having a cylindrical aperture therein, said aperture having an axis and having an opening in said forward surface,said forward surface having a countersink around said aperture,a unitary annular insert in said countersink, said annular insert having a cylindrical central opening axially aligned with said axis of said cylindrical aperture of said mounting block,said annular insert made of tungsten carbide,attachment means between said mounting block and said annular insert for attaching said insert within said countersink of said mounting block, andsaid insert having a forward surface, and said forward surface of said insert having at least one groove, said groove extending to an outer surface of said insert.