and 26 against pivotal cutter jaw proximal side 31 and distal side 32 the bearings 25 and 26 can be tapered roller bearings as illustrated in this embodiment of the invention bearings 25 and 26 can be positioned with the taper in either direction as desired for ease of construction and utilization of space in order to accomplish this pivot axle 4 is rigidly attached to proximal axle cap 33 preferably by means of proximal axle threads 34 being threaded into proximal axle cap 33 and then lightly welding the proximal axle cap 33 to axle 4 then a plurality of proximal bearing bolts 35 are inserted through unthreaded proximal flange orifices 36 and screwed into threaded proximal bearing bolt orifices 37 a select distance proximal positioning bolt 38 is then threaded into proximal positioning bolt orifice 39 a select distance in opposition to threaded positioning of the proximal bearing bolts 35 in accordance with desired positioning of proximal bearing 25 against a proximal bearing wall 40 in the proximal bearing flange 27 the proximal bearing bolts 35 and the proximal positioning bolts ar threaded select relative distances into their respective threaded orifices 37 and 39 and tightened this prevents movement of the proximal flange 29 in either direction it also locks the respective bolts against sides of threads in directions of thrust in accordance with effective threading technology a distal axle cap 41 is then.