GQ-15 engineering drilling machine is newly designed special for largediameter pile hole drilling, can use forward-circulation and reverse circulationdrilling methods mainly used in drilling large diameter pile for building,skyscraper, dam, harbor, bridge etc. and drilling large diameter well

    Big torque, lightweight and compact structure in compare with same kindmachine.
    Mast, top-drive head move down or up along with, strength andrigidity.
    Top-drive head has large inner diameter (182×182mm).
   Reverse-circulation drilling if equipped with necessary equipment as well asforward-circulation drilling.
    Strength, five forward speeds and onereverse speed, suitable for drilling a variety of rock, easy to handle accidentshappened in hole.
    Top-drive head is equipped with hand-powered chuck,square driving stem, large stroke, drilling efficiently.
    Hydraulic feed,big pull and push force easy to make pressure and depression drilling.
   Hydraulic retracting stroke is 1150mm, easy to lower and hoist drillingtools.
    Walking device, easy to move and find accurate holeposition.
    Reasonable arrangement, easy to operate, smooth.
    Can beequipped with special derrick if user needs