Rate reducers are mechanical devices generally used for two purposes. The principal use can be to multiply the quantity of torque generated by an input power source to increase the amount of usable work. They also decrease the input power supply speed to attain desired output 
speeds.
When looking at speed reducer vs. gearbox often the just difference is terminology. The reason being all quickness reducers are gearboxes. … The purpose of the speed reducer is to lessen the rpm that is transmitted between these two end points. Acceleration reducers take the torque created by the electric motor (the input) and multiply it
