effective length approx 1,00 m.
with rotary feedthrough for concrete pump, rapid coupling for connection of single lengths, persistent with thick-walled soul tube, screw starter reinforced, concrete outlet hole at the top
mainly used for SUB or tubular drill method.
register of construction equipment 1991
4354
wearing part
pilot bit tips, cutter teeth, round-shank chisel, tooth holder, build-up welding