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.

Key Advantages of the Self Anti-Backlash High-Precision Planetary Rotary Actuator

Ultra-High Positioning Accuracy – Delivers positioning accuracy up to 5 arcseconds.

Exceptional Torsional Rigidity – Offers approximately double the rigidity of equivalent RV reducers.

Long-Term Precision Stability – Maintains its high precision permanently throughout the entire product lifecycle.

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Innovative Technologies Behind the Precision Rotary Actuator

This breakthrough is achieved through HONPINE's proprietary displacement-type planetary carrier system. Instead of using a traditional rigid planetary carrier, it integrates a self-locking conical sleeve and a deformable carrier structure. When backlash arises, the system’s internal spring mechanism actively adjusts the planetary gear position, ensuring consistent zero-backlash engagement. Compared to conventional planetary reducers, this design delivers superior transmission precision, repeatability, and dramatically reduced gear wear—resulting in long-term accuracy retention.

Real-World Benefits in Industrial Applications

● Consistent Machining Quality – Improves mass production stability, boosts yield, and ensures reliable product quality.

● Lower Total Lifecycle Cost – Fewer maintenance cycles and enhanced production efficiency naturally reduce overall costs.

● Increased Equipment Value – Enhances product reputation and market competitiveness, while also increasing the residual value of second-hand equipment.

Why High Torsional Rigidity Matters

While torsional rigidity may not significantly affect positioning accuracy under balanced load conditions, it becomes critical under offset loading. For example, consider a 4-axis vertical rotary table with a 170 mm faceplate and an offset 20 kg load with its center of gravity 100 mm from the axis. At 90° rotation, the torque applied to the reducer’s output is approximately 20 × 9.8 × 0.1 ≈ 20 Nm.

HONPINE's in-house tests show the torsional rigidity ranking from lowest to highest as:

Harmonic < RV < SPINEA Cycloidal = Roller Cam < Sumitomo Cycloidal < Worm Gear < HONPINE Self Anti-Backlash High-Precision Planetary Rotary Actuator

The Self Anti-Backlash High-Precision Planetary Rotary Actuator is not only a product of strong technical innovation—it redefines industry standards. Its ultra-high precision is just the starting point. What truly sets it apart is its ability to maintain consistent accuracy throughout its lifespan via an active anti-backlash mechanism, ensuring performance that lasts.