KAH Rotary Actuator

High-Precision Compact Drive for Industrial Automation

High Torque Density: Built-in harmonic gear delivers strong torque in a compact form.
Precise Positioning: Exceptional repeatability and zero-backlash operation.
Compact Design: Space-saving integration; easy to embed into robotic systems.
Multiple Sizes Available: Offers various flange sizes and motor interfaces to fit different requirements.

The KAH rotary actuator delivers high torque and zero backlash with a compact harmonic drive design, ideal for collaborative robots, automation platforms, and precision rotary systems.

1. Product Overview

The KAH Series Rotary Actuator is a highly integrated, high-performance precision rotary module widely used in industrial automation, robotic joints, laser processing, medical equipment, and other high-end manufacturing sectors. By utilizing advanced harmonic drive technology, the actuator achieves true zero backlash, powerful output torque, and ultra-high positioning accuracy. All these are delivered in a compact and reliable design ideal for dynamic and continuous operation environments.

2. Key Features

Ultra-High Precision: With absolute positioning accuracy within 10 arc seconds (0.0028°), KAH actuators meet the stringent precision requirements of industries such as semiconductor manufacturing, medical imaging, and precision metrology.
High Torque in Compact Size: Delivering up to 800N·m torque in a compact structure, the KAH actuator provides powerful performance for robotic systems, grippers, and rotary workstations.
Hollow Shaft Design: The large hollow shaft enables internal routing of cables, air hoses, or laser beams, simplifying integration in systems like automation harnessing, optical alignment, and sensor embedding.
Extended Service Life: Built with aerospace-grade materials and long-life bearings, the KAH actuator is tested to maintain precision even after 20,000 hours of continuous operation.
True Zero Backlash: Thanks to harmonic drive technology, the actuator delivers true zero backlash, ensuring stable control and repeatability.
All-in-One Integration: The actuator integrates harmonic drive, torque motor, electromagnetic brake, encoder, and driver into a single unit.
High Dynamic Performance: Ideal for laser cutting and 3C automation, it offers quick response and synchronization with high-speed control algorithms.
Low Vibration and Noise: With dynamic balancing and precision machining, it maintains low vibration and noise even at high speeds.
IP67 Protection: Resistant to water and dust, suitable for outdoor and harsh environments.
Maintenance-Free: Sealed design and long-life lubrication eliminate the need for regular maintenance.

3. Application Industries

CNC Machine Tools: Spindle positioning, tool rotation, and platform indexing.
Laser Processing: Precise beam control for marking, cutting, welding.
Semiconductor Equipment: Chip packaging, wafer handling, inspection systems.
Factory Automation: AGV navigation, station switching, assembly lines.
Medical Devices: CT scanners, surgical robots, rehab systems.
Robotic Joints: Core rotational modules for cobots and industrial arms.
Solar Energy Systems: Azimuth/elevation control in solar tracking.
Logistics Automation: Sorting, stacking, material rotation modules.
LED & Printing Equipment: Precise motion control in printing or LED positioning.
Precision Metrology: High-precision rotary platforms for repeatable measurements.

4. Technical Specifications

Model	Rated Torque (N·m)	Max Torque (N·m)	Hollow Shaft Diameter (mm)	Repeat Accuracy	IP Rating
KAH-20	20	40	12	±5 arc sec	IP67
KAH-80	80	160	25	±5 arc sec	IP67
KAH-200	200	400	40	±3 arc sec	IP67
KAH-800	400	800	55	±2 arc sec	IP67

Model	Rated Torque (N·m)	Max Torque (N·m)	Hollow Shaft Diameter (mm)	Repeat Accuracy	IP Rating
KAH-20	20	40	12	±5 arc sec	IP67
KAH-80	80	160	25	±5 arc sec	IP67
KAH-200	200	400	40	±3 arc sec	IP67
KAH-800	400	800	55	±2 arc sec	IP67