Chamfering reamer with trip shoulder

An adjustable reaming tool for installation in the bore of a tripping die head of a threading machine for reaming the outside and inside diameters at the end of a threaded pipe or conduit and for activating a trip mechanism to open the die head, the adjustable reaming tool comprising;

• a generally cylindrical outer sleeve having a rear end adapted to be secured in a tool holder, a central bore extending rearwardly from the front end and a plurality of circumferentially spaced projections extending forwardly from the front end,
• the interior surface of each said projection extending rearward and inward at an angel relative to the longitudinal axis to form an inwardly tapered reaming surface to receive and ream the outer diameter at the end of a pipe or conduit received thereon and terminating in a trip shoulder extending radially inward to said central bore and angled transversely to contact the end surface of the pipe or conduit being reamed,
• said outer sleeve projections including said trip shoulder when viewed from the front end each have diametrically opposed flat leading edge surfaces and a flat tailing edge surface spaced generally parallel thereto in a clockwise direction from said leading edge surface and said inwardly tapered reaming surface extends therebetween,
• an inner reamer insert having a cylindrical rear portion and a truncated conical forward end longitudinally fluted to define a plurality of circumferentially spaced wings extending longitudinally rearward and outward a distance from the front end at an angle relative to the longitudinal axis to form a segmented generally conical reaming portion to be received partially within the interior diameter of a pipe or conduit to ream the interior diameter at the end of the pipe or conduit received thereon,
• said inner reamer insert rear portion slidably received within said outer sleeve central bore and said inner reamer insert wings positioned between said outer sleeve projections in alternating relation such that when viewed from the side, each said rearwardly and outwardly extending wing overlaps the adjacent trip shoulder of said outer sleeve projection and the adjacent angled surfaces cooperatively form a plurality of inwardly extending, flat bottom, V-shaped grooves with said trip shoulder forming the bottom of the groove, and
• longitudinal adjustment means threadedly connected between the rear portions of said inner reamer insert and said outer sleeve along the the longitudinal axis to adjustably position said inner reamer insert wings longitudinally relative to said outer sleeve projections, whereby
• the width of said flat-bottom, V-shaped grooves can be adjustably altered to receive pipe or conduit of various wall thicknesses and to simultaneously ream the exterior and interior diameters at the end of the pipe or conduit with said trip shoulder contacting the end surface of the pipe or conduit being reamed with sufficient force to activate the trip mechanism of the die head.