The main features of worm and worm gear reducers include reverse self-locking function, a high reduction ratio, and the input and output shafts not aligned on the same axis or plane. However, they are generally larger in size, have lower transmission efficiency, and lower precision. Harmonic drive reducers use the controllable elastic deformation of flexible elements to transmit motion and power, featuring compact size and high precision, but with the drawbacks of limited life of the flexible wheel, poor resistance to impact, and lower rigidity compared to metallic components. The input speed should not be too high. Planetary gear reducers have the advantage of a compact structure, small return gap, high precision, long service life, and the ability to achieve a high rated output torque. However, they are slightly more expensive. Gear reducers are characterized by their small size and high torque transmission capabilities. Designed and manufactured on a modular system, they offer various motor combinations, installation types, and structural options, with fine transmission ratio gradations to meet different operating conditions and achieve mechanical and electrical integration. Gear reducers have high transmission efficiency, low energy consumption, and superior performance. The cycloidal pinwheel reducer is a transmission model that employs the cycloidal pin gear planetary transmission principle, making it an ideal transmission device with many advantages, wide applications, and the capability for both forward and reverse operation.