Long Screw Drill Tools Can realize the 360 degree full revolution Flexible, Convenient No shock,noise or pollution Long Screw Drill Tools Main Technical ParameterModelZKL-18TypeZKL-20Type Hole diameter(mm)400,600800400,600800 Drilling depth(m)18162016Power unitPower (kw)37 × 2 Rotation(r/min)23,40 Torque(KN.m)30.7Travel step length (m)1.1Revolution angle°360°Pile holder Mass (t) Operating mode24. ...