When you use the motor, there should be no binding objects, such as the adhesive should not be injected into the bearing through the rotating bearing, which will hinder the operation of the motor. The rotation of the shaft may have the opposite effect on the lifespan of the motor. In order to extend the lifespan, please check if your load is in accordance with regulations and do not overload or hang objects that hinder rotation on the shaft end Manufacturing an eccentric heavy radiation load can harm the lifespan of the motor. Do not store in high temperatures or extreme humidity around, nor do you place it in corrosive gas, as it may reduce the effectiveness of the motor. Do not operate the motor in the surrounding high temperature and humidity. type: Brushed gear motor 372 Rpm / 63 Rpm / 17 Rpm / 2386 Rpm Standard Operating Conditions: Rated Voltage: 6v. Direction of Rotation: CW when viewed from output shaft side Operating Temperature and Humidity: Temperature range of -10C~+50℃, Humidity range of 30%~80%. Storage Temperature: Temperature range of -20C~+60℃ Measuring Conditions: Motor Position: To be place t horizontally when measuring Power Supply: Regulated DC power supply fit for Robotics, Small Appliance, Fanner, Electric Curtain; Surgery Tools, centrifugal Machine; Electric Valve, Actuator Electric motor, low noise, low current and no spark. Ratio: 3.4 4.6 11 15.5 21 38 52 72 100 126 175 242 334 462 Material: Metal colour: Silver+black Package Contents: 1 x 372 Rpm motor / 1 x 63 Rpm motor / 1 x 17 Rpm motor / 1 x 2386 Rpm motor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different