What is a cycloidal reducer?

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 additional drives a cycloidal disk (sometimes known as a cam) that connects to an result shaft.

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

The cycloidal disk (or cam) has lobes or teeth that engage with some type of cam follower, typically a pin or needle bearings. The eccentric rotation of the cam can be transformed into rotation of an output shaft at a reduced speed and a rise in torque.

The main advantage of cycloidal reducers is their house of zero or near-zero backlash, which results in high precision and high accuracy. This is especially Pulley popular 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, thus experiencing less overall put on.