Cycloidal gears are used in pairs and are set at an angle of 180 degrees used to balance the load and are driven by multiple crank shafts to share the load and increase torsion rigidity. Cycloid reducers use rolling elements and a multilobe cam to transmit torque and provide speed reduction. A worm gear is an inclined plane wrapped around a central axle. It is a gear with one or more teeth in the form of screwed threads.