A cycloidal reducer is a type of gear reducer. The basic operation is that an input shaft connects to and drives an eccentric bearing. This bearing further drives a cycloidal disk (sometimes referred to as a cam) that connects to an output shaft.

cycloidal reducer
Normal cycloidal speed reducers, such as for example these Dojen series reducers from Onvio, offer zero backlash by combining a compound reduction cam with preloaded, full compliment needle bearing cam followers.

The cycloidal disk (or cam) has lobes or teeth that build Gear relationships some type of cam follower, typically a pin or needle bearings. The eccentric rotation of the cam is certainly changed into rotation of an result shaft at a reduced speed and an increase in torque.

The main benefit of cycloidal reducers is their house of zero or near-zero backlash, which results in high precision and high accuracy. This is especially in demand where highly precise and accurate positioning is required, for instance in robotic applications, machine equipment, and similar applications. Cycloidal reducers also feature rolling as opposed to sliding contact, therefore experiencing less overall wear.