A gear reducer is used in various applications to adapt the torque and speed of the input and output axis of a mechanism. There are four major categories of reducers: bevel gear reducers, worm gear reducers
, gear train gear reducers, and planetary gear reducers. Also referred to as gear boxes, speed reducers
, gear drives or gear shifters, these handy devices also provide mechanical safety by gradually reducing the speed of rotating equipment. In the simplest form, gear reduction is set in ratios that are related to a characteristic value of the output and input gear components. A good example of gear reduction is the internal combustion engine of an automobile that must operate at a high speed for smooth power production. When the vehicle stops, slowing the journey, the speed of the engine would cause wheels to spin or cause the loss of steering control if it is applied directly to the wheel. By using a gear box, the energy can be used to overcome the inertia of the car or even allow for heavier items to be towed but at a lower velocity. Gear reducers are made of various materials with aluminium topping the list due to its sturdiness.