P series high-precision planetary reducer, servo planetary reducer is another name for planetary reducer in the industry. Its main transmission structure is: planetary gear, sun gear and inner ring gear. Compared with other reducers, the servo planetary reducer has the characteristics of high rigidity, high precision (within 1 point in a single stage), high transmission efficiency (97% – 98% in a single stage), high torque / volume ratio, lifelong maintenance free, etc. Most of them are installed on stepping motor and servo motor to reduce speed, increase torque and match inertia. For structural reasons, the minimum single-stage deceleration is 3 and the maximum is generally no more than 10