LRA Linear Rotary Actuator
A highly integrated two-axis electric actuator that combines linear (Z-axis) and rotary (R-axis) motion for helical trajectories. Designed for screw fastening, nut tightening, connector insertion, dispensing and other automation tasks requiring combined linear+rotary motion.
The Core Component for Precision Fastening & Assembly
The LRA linear rotary actuator uses a dual-motor independent drive: the linear and rotary axes are controlled by separate servo motors, enabling linear motion, rotary motion, and coordinated two-axis helical motion. The linear side uses a precision ballscrew for high positional accuracy; the rotary side uses a high-precision reducer for high torque and accurate angular positioning.
Various tools—screwdriver bits, suction cups, grippers—can be mounted at the end. It is widely used in automatic screw fastening, nut tightening, connector insertion/extraction, rotary dispensing, and cap tightening. With high integration and easy mounting, it greatly simplifies machine design and is the core actuator for precision assembly automation.
Core Product Advantages
Two-Axis Combined
Integrates linear + rotary axes that move independently or in coordination for helical paths, in a compact structure.
High Precision
Linear repeatability ±0.01mm and rotary repeatability ±0.01° meet precision assembly requirements.
Torque Control
The rotary axis supports torque control for precise fastening torque and consistent screw quality.
Multiple End-Effectors
A standard tool-mount interface accepts screwdriver bits, grippers, suction cups, dispensing valves and more.
Trajectory Programming
Supports position, velocity and torque control modes for programmable complex motion trajectories.
Bus Control
EtherCAT/Modbus bus control for fast integration into automation systems with multi-axis coordination.
Specifications
| Parameter | LRA-50 | LRA-100 |
| Linear Stroke | 50mm | 100mm |
| Linear Repeatability | ±0.01mm | |
| Max Thrust | 100N | 300N |
| Rotary Angle | 360° Continuous | |
| Rotary Repeatability | ±0.01° | ±0.02° |
| Rated Torque | 1N·m | 3N·m |
| Communication Protocol | EtherCAT | |
Typical Applications
Screw Fastening
Automatic screw driving equipment
Precision Assembly
Connector insertion, component assembly
Dispensing & Coating
Rotary dispensing and glue coating
Medical Assembly
Medical device assembly
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Combined linear-rotary two-axis motion for all your fastening and assembly needs