cycloidal drive

A cycloidal drive or cycloidal rate reducer is a system for reducing the rate of an input shaft by a specific ratio. Cycloidal swiftness reducers are capable of fairly high ratios in small sizes. [1]

The input shaft drives an eccentric bearing that in turn drives the cycloidal disc within an eccentric, cycloidal movement. The perimeter of the disc is targeted at a stationary ring gear and has a series of planetary gearbox result shaft pins or rollers placed through the face of the disc. These result shaft pins directly drive the result shaft as the cycloidal disc rotates. The radial motion of the disc is not translated to the result shaft.