■ ZGYX-420S/425S drill rig with dual power packs,standard standard ф 76 mm * 3 m drill pipe or optional variety of spiral rods.Diesel and electric power switchable when needed.
■ Cycloid motor large torque rotation unit with maximum rotation unit torque up to 5,600 N.m for pit bolting, casing and large-diameter spiral drilling and improved torque for large hole size range.
■ Two rotation speeds switchable by convenient control valves for different requirements of torque and speed. 425S standard with drill pipe removal device.
■ Standard equipped more reliable heavy duty tramming motor and international standard construction machinery track for better sloping ability and stable quality.