Planetary gearboxes, with their core advantages of high transmission efficiency, high torque density, high positioning accuracy, low backlash, and compact structure, have become key power transmission components in CNC equipment. Their primary function is to convert the high-speed, low-torque output of servo motors or stepper motors into low-speed, high-torque output, while ensuring transmission accuracy and stability, thereby meeting the stringent requirements of CNC machine tools for motion control, positioning accuracy, and load capacity.