BREAKING OR EXCAVATING TOOL WITH CEMENTED TUNGSTEN CARBIDE INSERT AND RING, MATERIAL REMOVING MACHINE INCORPORATING SUCH A TOOL AND METHOD OF MANUFACTURING SUCH A TOOL

摘要

An exemplary breakingor excavating tool (2) includes a body (4)having a mounting end (6) and a working end(8). A seating surface (12) at the workingend (8) includes a cavity (14) and axiallyprojecting sidewalls (16) formed integral tothe body (4), an insert (20) mounted withinthe cavity (14) has a tip (22) at an axiallyforwardmost end (24), a tapered forwardsurface (26), a side surface (28) and atransition edge (30) at an intersection of theforward surface (26) and the side surface(28). A ring (20) located radially outwardof the projecting sidewalls (16) is formedof a material harder than the body (4) ofthe tool (2). The transition edge (30) and anaxially forwardmost surface of each of thesidewalls (16) and the ring (20)are arrangedin an axially rearwardly extending steppedconfiguration. A material removal machineon which the breaking or excavating tool (2)is mounted and a method of manufacturingthe breaking or excavating tool (2) are alsodisclosed.