Mining tool with asymmetric cutting insert.

Abstract

A percussion drill bit for drilling a hole comprising a drill bit body with a front face surrounded by a gauge and a longitudinal center axis of the drill bit; and a plurality of gauge inserts embedded in the gauge; wherein the gauge inserts have a longitudinal center axis of the insert, a cylindrical shank portion; a working point portion; a radially internal side located on the side closest to the center axis of the drill bit and a radially external side on the side furthest from the center axis of the drill bit; characterized in that: the working point portion of the gauge inserts has an asymmetric geometry wherein the volume of material on the radially external side is greater than the volume of material on the radially internal side.