Many machines utilize gears to carry out their designated tasks. Often times, it will be necessary to change the amount of speed or rate at which the gears rotate. When this is the case, a gear reducer is needed. There are several variations on the standard gear reducer, and the model that you select will be dependent on your particular needs.
The three main types of gear reducers are the worm, bevel and helical. A worm gear reducer is at a right angle and provides the highest level of speed reduction in the smallest package. A bevel gear reducer is at a right angle as well but it has a much higher efficiency. Helical gears are more efficient and can handle higher work loads than their two counterparts.