Features: The worm gear mo tor 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 different applications, and are probably used in many devices in your home. Specification: Model: 5M120GN-RV30 Pole: 8-pole Rated Power: 120W Rated Voltage: AC 220V Speed: 1400rpm Reduction Ratio: 5K, 7.5K, 10K, 15K, 20K, 25K, 30K, 40K, 50K,60K, 80K (Optional) Weight: Approx. 4950g / 174.6oz Reduction Ratio (K) Output Shaft Speed (r/min) Moment of Force N.m kgf/cm 5 280 3.57 36.4 7.5 186 5.38 54.7 10 140 6.43 65.6 15 93 9.66 98.6 20 70 11.6 118 25 56 14.6 149 30 46 17.5 196 40 35 19.6 200 50 28 19.6 200 60 23 19.6 200 80 18 19.6 200 Note: 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 Motor 1 * Speed Governor 4 * Screw .