Characteristics of Cycloidal Pin-Wheel Speed ​​Reducers

It is capable of achieving a high reduction ratio of up to 1:87 and an efficiency exceeding 90% in a single-stage transmission; when multi-stage transmission is employed, the reduction ratio becomes even greater. The reduction ratio for a single-stage unit ranges from 9 to 87, while a double-stage unit ranges from 121 to 5,133; multi-stage combinations can reach ratios in the tens of thousands. Furthermore, the pin-tooth meshing system utilizes a sleeve-type rolling friction mechanism-meaning there is no relative sliding between the meshing surfaces-resulting in a single-stage reduction efficiency of up to 94%. The unit features a compact structure and small footprint; by adopting the principle of planetary transmission-where the input and output shafts share the same central axis-the design achieves the smallest possible dimensions. Operation is smooth and noise levels are low; the cycloidal pin-tooth meshing involves a large number of teeth and a high overlap coefficient, combined with an inherent mechanism for component balance, thereby minimizing vibration and noise to the lowest possible levels.

During operation, a large number of tooth pairs are in simultaneous contact, resulting in a high degree of coincidence, smooth operation, and strong overload capacity. Vibration and noise levels remain low across all model specifications. The unit offers high operational reliability and a long service life; key components are manufactured from bearing steel and undergo quenching treatment (to a hardness of HRC58–62) to achieve high strength. Additionally, the transmission contact points utilize rolling friction, ensuring exceptional durability and longevity. Specifically, the main components are precision-ground after being quenched (HRC58–62); the cycloidal teeth mesh with pin-tooth sleeves to form a rolling friction pair with a very low friction coefficient. This eliminates relative sliding within the meshing zone, resulting in minimal wear and ensuring long-term durability. With its rational design, ease of maintenance, simple assembly and disassembly, minimal component count, and straightforward lubrication requirements, the cycloidal pin-wheel reducer has earned the deep trust of users. Compared to other reducers of equivalent power output, it is more than one-third lighter and smaller in volume; thanks to its planetary transmission design-where the input and output shafts are aligned on the same axis-it achieves the most compact dimensions possible.