Speed reducers are gear reduction devices that help drive systems maintain optimal speed and torque. Also known as gearboxes and gear drives, they lower the speed of rotation of the input shaft. Input shafts can be mounted rigidly in a C-face orientation, inline or at a right angle. Mounting bases, flange couplings, bushings, and torque arms are accessories used to enhance the installation and increase the efficiency of speed reducers. Speed reducer replacement parts repair worn or damaged components in a compatible system.