The load torque of a DC gear motor has a direct relationship with the speed and current. The speed decreases linearly with the increase of the load, and the current increases linearly. When selecting specifications, try to work around its comparative efficiency point to obtain ideal operating performance, working life and characteristic stability.
Generally, the use environment of DC gear motors is the same as that of micro DC motors. If there are special needs, such as ambient temperature, overload conditions, current limits, etc., they must be explained in advance.
The working life of the gearbox generally exceeds the working life of the DC motor, usually up to 1000 to 3000 hours.
The total reduction ratio of the gearbox is generally in the range of 1:10 to 1:500. Through special design, it can reach 1:1000 or greater, but the gearbox with a large reduction ratio is not allowed to "reverse", that is, the output shaft of the gearbox cannot be used as the driving shaft to forcefully reverse.
Due to the limitation of gear strength, when the total transmission is large, the gear motor may not be able to withstand the locked-rotor torque. At this time, the load torque cannot exceed the maximum allowable short-term load torque. The gear box is composed of multiple gear pairs. Each stage includes a pair of meshing gear pairs consisting of a sheet gear and a pinion gear. The pinion gear is mounted on the output shaft of the motor. The bearing used in the output shaft of the gearbox is usually an oil bearing made of copper or iron sintered material