Rock bit with diamond reamer to maintain gage

摘要: A rock drill bit comprises a body and at least one rolling cone cutter mounted on the body, comprising plurality of tungsten carbide inserts including gage for drilling adjacent peripheral wall hole being drilled. At diamond protrudes from to provide cutting edge substantially diameter so that such insert can engage drilled, thereby maintaining gage. Each slug inserted in plate bonded slug. Such cutters are portion above cones.