rotary core drilling rig HFT-350B 1 Weight: 19340kgs 2 Working size: 11110*2490*13110mm (L*W*H) rotary core drilling rig HFT-350B Technical parameter Drilling depth(M)80300 Drilling diameter(mm)1500500 Speed of turntable(r/min)21.2,36,63.2,100.6,155,20.2(reverse) Torque of turntable(KN.m)18,10.6,6,3.8,2.5,18.9(reverse) Single rope lifting capacity of windlass(KN)30 the max torque of whole machine ...