The history of speed reducers may date back to about two thousands years ago (100 and 150 BC) when the Antikythera mechanism, believed to be the earliest known metal gear device, was built and used...
A reducer boosts your motor's torque, allowing a receiving part to rotate under the influence of a new torque.
As mechanically power transmission industrial devices, speed reducers seems to be far away from general public, and even many people have heard the term for the first time.
There are a very diverse range of speed reducers and gearboxes.
Generally the purchase cost of the motor is relatively much higher than that of the speed reducer.
There are many ways to reduce motor speed in industrial applications, the most commonly used method is gear assembly (gearbox).
