Features:The worm gear motor with self-locking, even if in the absence of electricity in the motor, the output shaft is not to move, that is self-locking.This motor is adopted of pure copper wire coil, with low heat and low loss.The motor is made of metal gear, wear-resisting, avoid tooth breaking, so with long serving life.Squirrel-cage Rotor: Double bearing connection, reliable structure, stable rotor resistance, good anti-overload ability and temperature stability.Gear motors can be found in many differentapplications, and are probably used in many devices in your home. Specification:Model: 5M120GN-RV30Pole: 8-poleRated Power: 120WRated Voltage: AC 220VSpeed: 1400rpmReduction Ratio: 5K, 7.5K, 10K, 15K, 20K, 25K, 30K, 40K, 50K,60K, 80K (Optional)Weight: Approx. 4950g / 174.6ozReductionRatio (K)Output Shaft Speed (r/min)Moment of ForceN.mkgf/cm52803.5736.47.51865.3854.7101406.4365.615939.6698.6207011.6118255614.6149304617.5196403519.6200502819.6200602319.6200801819.6200Note:With different reduction ratio, the output shaft speed will differ. Output shaft speed is equal to dividing motor speed 1400rpm by reduction ratio.Package List:1 * Speed Adjustable Motor1 * Speed Governor4 * Screw.