Oriental Motors Hollow Rotary Actuators Enhance Space Efficiency

In today's space-constrained automated production lines, engineers face the dual challenge of achieving precise rotational movement while accommodating complex piping and cabling requirements. Hollow rotary actuators have emerged as an ideal solution, offering unique design advantages that address these spatial and performance demands.

These specialized devices feature a hollow shaft design that allows wires, pipes, or other components to pass through their center. This innovative approach enables compact system designs while meeting the needs of complex applications. They are particularly valuable in robotics, automated assembly lines, medical equipment, and semiconductor manufacturing where precision and space efficiency are paramount.

Key benefits include:

• Space efficiency: The hollow shaft design maximizes space utilization by allowing components to pass through the actuator, reducing overall equipment size and complexity.
• High precision: Equipped with precision bearings and encoders, these actuators deliver accurate positioning and repeatability for demanding motion control applications.
• High torque-to-weight ratio: Optimized designs and material selection enable high torque output while maintaining low weight, enhancing overall system performance.
• Simplified design: The integrated hollow shaft reduces external wiring and piping requirements, streamlining machine design and assembly while lowering costs.

The DGII series represents a complete, user-friendly solution that combines a high-rigidity hollow rotary table with integrated motor and drive components. This configuration maintains the ease of operation characteristic of step motors while enabling highly precise positioning of large inertial loads.

Notable features include:

• Integrated design: Combining actuator and motor reduces component count and wiring, shortening development cycles.
• Flexible mounting options: Available in both vertical and horizontal motor configurations to accommodate diverse application requirements.
• Large-diameter hollow output table: Accommodates multiple wires, pipes, or components for enhanced design flexibility.
• Dual power input: Supports both AC and DC power sources for convenient implementation.

Beyond the complete DGII series, manufacturers also offer standalone hollow rotary gearboxes with identical structure but designed for use with various servo motors. These units connect via actuator couplings and are particularly suited for large inertial drive applications.

Standalone units provide:

• Versatility: Compatibility with multiple servo motor brands offers greater selection flexibility.
• High torque output: Capable of driving large inertial loads.
• Large hollow output table: Maintains the same wiring and piping convenience as integrated models.

Hollow rotary actuators serve diverse industrial applications:

• Robotics: Enabling precise joint movement to enhance robotic flexibility and accuracy.
• Automated assembly: Positioning and rotating workpieces to improve assembly quality and throughput.
• Medical technology: Powering medical scanners and surgical robots requiring exact positioning.
• Semiconductor manufacturing: Handling wafers with nanometer-level precision.
• Inspection systems: Facilitating precise rotation and positioning for enhanced measurement accuracy.
• Printing and packaging: Driving rollers and positioning components to improve production quality.
• Machine tools: Enabling accurate workpiece rotation on CNC index tables.

As automation technology advances, demand grows for compact, high-performance rotary actuators. Future developments will likely focus on:

• Enhanced precision to meet stricter application requirements
• Smaller form factors without compromising performance
• Increased integration of sensors and smart control features
• Broader adoption across industries as costs decrease

Hollow rotary actuators continue to provide critical motion control solutions across industries, combining precision engineering with space-saving designs to meet evolving automation challenges.