1,dia of drill head is increased, ... we have designed XY-4-3 spindle type core drilling rig. It is developed on XY-4 -3drill. The central ... The drilling rig can be used not only in core drilling, but also in engineering geological. If ... the drill is equipped with a 22 kW of 30 kW, 6 poles ... 29Hoist lifting speed (3rd layer, m/s)0.82, 1.53, 2.16, 3.13Wire rope dia. (mm ...