●Designed for gravel and rock(up to 150 Mpa).
●Driven by inner gear, big driving torque, no axis.
●Direct access to the tunnel face for maintenance and repair work .
●Through cutterhead rotation,stones or obstructions entering the crusher cone are crushed to a conveyable grain size.
●Bentonite injected into the annular gap reduces friction between the extrados of the pipe and surrounding soil.