Item Type: Electric Motor Gear Box Material: ABS, alloy, copper Purpose: Motor gear box for children's cars Working Voltage: 12V Motor Speed: 30000RPM Hole Diameter: Approx. 13mm / 0.5in Total Length x Width: Approx. 200 x 110mm / 7.9 x 4.3in Motor Diameter: Approx. 36mm / 1.4in How to Use: 1. Easy to install, pay attention to the lubrication of the gear box to prolong the service life. 2. After the gear box is installed, it should be flexibly rotated manually without jamming, and the contact spots on the tooth surface should meet the requirements of technical conditions. 3. According to the requirements of the manual, add the specified oil to reach the oil markscale, and run it without load before formal use. At this time, the gear box can be driven by the motor. After inspection, the gear box runs smoothly, without shock vibration and abnormal noise, and is lubricated. Only when the condition is good and the sealing and joint surfaces do not leakage oil can it be put into trial operation together with the unit. Package List 1 x Electric Motor Gear Box 1Middle gear is metal, and the motor is thickened copper wire, so coexist power and speed 2Gears are more wearresistant and can be used for a long time, very stable when working 3The product come with easy installation, strong interchangeability, very practical and convenient 4Using ABS, alloy, and copper material, possess impact resistance, suitable for motor gear box of children's cars 5Working voltage is 12V, motor speed for 30000RPM, come with high working efficiency