... dia of drill head is increased, 2,the derrick,self-traction device are advanced 3,auxiliary transmission gear box ... have designed XY-4-3 spindle type core drilling rig. It is developed on XY-4 -3drill. The ... well as a auxiliary transmission gear box.The drilling rig can be used not only in core drilling, ... consider power losses. XY43 1200meter Core Drilling Rig,Water Well & Geology exploration capable