High torque zero-backlash planetary rotary actuator for drilling equipment boosts hole accuracy, repeatability, and uptime with stable torque and compact precision motion.

How does Planetary Rotary Actuator work? Discover the step-by-step kinematic principle—sun, planet, and ring gear interaction—that delivers high torque density and precision for machine tools.

On July 8, 2025, HONPINE successfully developed the world’s first HPG-10T-74-AG1-30-A-C-K11 Self Anti-Backlash High-Precision Planetary rotary actuator. This cutting-edge reducer, designed for a leading laser cutting machinery manufacturer, features ultra-high precision and ultra-high torsional rigidity. It resolves a long-standing industry challenge: the inability to simultaneously achieve high precision and high rigidity in a single reducer unit.

The backlash-free planetary rotary actuator typically integrates an internal rotor frameless torque motor with precision backlash-free planetary gearboxes, absolute encoders, and other components to form a complete rotary actuator unit. Its control system (drive unit) is usually externally mounted, enabling high-precision motion control for connected equipment. Compared to harmonic drive-based rotary actuators, this series employs high-rigidity backlash-free planetary gearboxes, offering superior stiffness, load capacity, and bending moment resistance. It is designed for applications demanding high rigidity, ultra-precision, and compact integration, such as machine tool rotary tables, precision medical devices, 5-axis laser cutting systems, and semiconductor equipment.