... drill rig for explosive drilling, which is mainly used for DTH drilling,DTH drilling for hard rock, basket bit or auger boring ... mm (¢75 mm)(Hole depth)30mDrilling method(Hard rock)(Air DTH)(Soil)(Basket bit or auger boring)Max. torque700 N.mRated ... kg)Drilling tools(Drill rod)(¢42*1500mm with sunk joint) (DTH)(¢70 DTH, ¢75 bit)(Air compressor(Air flow 3-4 cubic ...