... and reverse circulation drilling, we have designed XY-4-3 spindle type core drilling rig. It is ... developed on XY-4 drill. The central opening dia of drill head ... with a 22 kW of 30 kW, 6 poles electric motor, the lowest speed of the spindle is 24r ... by clients request) Diesel engine2135type.30kW,1500r/minElectric motorY225S-4.37kW,1480r/min Y200L2-6,22kW,980r/minDimensions (L ...