Drilling Rig for Construction of SMWBored Pile Drilling Rig Time:2017-04-18 Hits:14414 Font Size: Name Unit Parameters Hole dia. mm 600 Center distance of rig mm 450 Max drilling depth m 30 Max output torque kn·m 84 Rod rotary speed r/min 20 Motor power kw 2X75 Total weight t 19.8