K5 - A.C. synchronous motors M80 - M81 - M52 Because of his size is the only one on market with fully hobbed steel gearset, which ensures high reliability. Drove by A.C. synchronous motors, 230V-50Hz.. M80 and M81 motors with single turning direction, to indicate. M52 motor is bidirectional. It runs in whatever position and in both turning directions. Maximum output torque 0.5 Nm, steady load. Gearbox ratios from 4.8:1 to 30,000:1. For special requests, please, contact our commercial department.