- Big torque, lightweight and compact structure in compare with same kind machine.
- Mast, top-drive head move down or up along with, strength and rigidity.
- Top-drive head has large inner diameter (182×182mm).
- Reverse-circulation drilling if equipped with necessary equipment as well as forward-circulation drilling.
- Strength, five forward speeds and one reverse speed, suitable for drilling a variety of rock, easy to handle accidents happened 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 drilling tools.
- Walking device, easy to move and find accurate hole position.
- Reasonable arrangement, easy to operate, smooth.
- Can be equipped with special derrick if user needs.