Apex, Cyclone, Delta, Faulhaber. Harmonic Drive, Moog, Parker Bayside, and Thomson provide an endless selection of gearboxes/gearheads.
Gearboxes and gearheads are power transmission devices that use a gear arrangement in an enclosed housing to transfer energy, increase torque and reduce speed from one device to another. They consist of gears arranged in a housing with a method for attaching to an input drive (a motor or drive shaft) and an output component (usually a shaft). Input and output connection configurations for gearboxes and gearheads include solid shaft, hollow shaft and integral coupling. 
