... 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 ... , m/s)0.82, 1.53, 2.16, 3.13Wire rope dia. (mm)15.5Drum capacity (four layer ... clients request) Diesel engine2135type.30kW,1500r/minElectric motorY225S-4.37kW,1480r/min Y200L2-6,22kW,980r/minDimensions (L ...