Drilling depth (m) 1000 Spindle speeds （r/min） forward 87; 160; 230; 270; 334; 500; 710; 1030 reverse 72; 220 Max.toque of spindle （Nm） 4050 Spindle stroke (mm) 600 Spindle inner dia. (mm) 96 Spindle pull/push force(kg) 10000/7500 Hoist max. lifting force with single rope（㎏） 4500 Hoist lift speed with single rope (the third layer)(m/s) 0.69; 1.27; 1.81; 2.64 Hoist wire rope dia. and capacity (m) Ф17.5(170kg/cm2)wire rope capacity 110 m Ф18.5(170kg/cm2)wire rope capacity 90 m Workable speed of water brake (r/min) 700- 1800 Balance speed of water brake(single rope)/balance load(single rope) 3-8m/s/45kN Hydraulic system (32+12)L/min twin-gear pump,pressure:80kg/cm2  Driving stem Hexagonal kelly Ф89×79×6000 mm Power unit Electric motor Y225-4 37Kw 1480r/min Diesel engine R4105G54 42Kw 1500r/min Weight (excluding power unit)(kg) 2180 Max. detachable subassembly (kg) 320 Overal dimesion (L×W×H)(mm) 2920×1100×1840