... system, the transfer case, gearbox, double-winch unit, mud pump, turntable, drilling tower, feed mechanism are set up on the chassis ... Drilling depth(M)400 Drilling diameter(mm)500 Speed of turntable(r/min)117; 102; 60; 38; 22; 13; 14(reverse ... ) Torque of turntable(KN.m)7.5------75Single rope lifting capacity of main ...