The flange output planetary gear reducer is a precision transmission device that combines a planetary gear transmission system with a flange output structure. Its core components consist of a sun gear, planet gears, and an internal ring gear, achieving power transmission through single-stage or multi-stage gear meshing. The flange, serving as a critical connection component, features a circular design with integrated high-precision bearings, providing enhanced contact area and stable mounting support. Compatible with power sources such as servo motors and stepper motors, this reducer is widely employed in precision equipment across CNC machine tools, industrial robots, automated production lines, and aerospace applications.