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Direct Drive Rotary Motor-DDRE-140-50

Motor Size ；140(D)*50(H)mm Cont Torque ；6N.m Peak Torque ；16N.m Cont/Peak CUR ；2.5/7A-rms

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DDRE Series (External Rotor Motor)

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DDRE-140-50 Direct Drive Rotary Motor
High Torque · Compact Structure · Zero Backlash Precision Rotation
Ⅰ. Product Overview
The DDRE-140-50 from W-Robot is a compact, high-torque direct drive rotary motor designed for high-precision motion control applications.
With a 140 mm outer diameter and a 50 mm hollow shaft, this model integrates advanced electromagnetic design and precision bearing support to deliver high torque density, smooth rotation, and zero backlash operation.
Thanks to its large through-hole structure, the DDRE-140-50 allows easy routing of cables, pneumatic tubes, or optical fibers — enabling simpler mechanical design and cleaner system layouts. It’s ideal for robotic joints, semiconductor handling, inspection systems, and rotary positioning platforms that demand compact size and superior accuracy.
Ⅱ. Technical Features
Direct Drive Mechanism: Eliminates transmission backlash for accurate, responsive motion.
Compact 140 mm Frame: Balances torque performance with small form factor.
Large Hollow Shaft (Ø50 mm): Enables through-hole for cable or air hose management.
High Torque Density: Delivers strong continuous and peak torque with minimal heat rise.
Low Cogging Design: Precision magnetic layout ensures ultra-smooth rotation.
High-Resolution Feedback: Supports absolute or incremental encoders for sub-arcsecond control.
Maintenance-Free: No gears or belts — reducing wear, noise, and periodic lubrication needs.
Ⅲ. Application Fields
The DDRE-140-50 is suitable for various precision automation and motion control scenarios, including:
Collaborative and industrial robot joints
Rotary indexing tables and alignment systems
Semiconductor wafer handling and inspection tools
Optical scanning and metrology equipment
Medical and laboratory automation platforms
Precision machining and testing instruments
With its zero-backlash transmission and superb torque response, it ensures high stability and smooth operation in demanding environments.
Ⅳ. Model Customization Options
W-Robot provides flexible customization to fit customer applications:
Encoder configuration: absolute / incremental / serial type
Shaft and flange customization for system compatibility
Torque constant and rated speed adjustment
Air or liquid cooling for high-load operation
Integrated servo drive option for compact control solutions
Multi-axis integration (rotary + linear modules)
Ⅴ. Product Advantages
Zero backlash & high stiffness for unmatched positioning accuracy
Compact and lightweight design suitable for limited-space installations
Large hollow shaft simplifies cable management and assembly
High reliability and low maintenance for 24/7 operation
Excellent dynamic response with fast acceleration capability
Quiet and vibration-free motion for clean environments
Ⅵ. Installation & Maintenance
Mount the unit on a stable, flat, and rigid base to ensure alignment.
Follow recommended torque values for all screws.
Calibrate encoder and homing position during first installation.
Keep the center hole clean and free from debris or liquids.
Avoid exposure to high humidity or excessive magnetic interference.
Periodically verify alignment accuracy and torque output.
Ⅶ. Learn More
For further details and support, visit www.w-robot.com:
Download the DDRE Series catalog and 3D CAD files
Read: “Why Direct Drive Motors Are the Future of Precision Automation”
Contact W-Robot’s engineers for customization and system integration guidance
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Listed below are answers to our most commonly asked questions. Don't see your question?Contact our customer service team. We would be glad to assist you.

FAQ

Listed below are answers to our most commonly asked questions. Don't see your question?Contact our customer service team. We would be glad to assist you.

What are the future development trends of linear modules and linear motors?

In the future, linear modules and linear motors will develop towards higher precision, higher speed, smaller size, intelligence, and integration with other advanced technologies (such as artificial intelligence and the Internet of Things).

What parameters need to be provided for customized linear motors?

It is necessary to provide detailed parameters such as load weight, stroke, speed, acceleration, accuracy requirements, installation method, and operating environment so that the manufacturer can design and manufacture a linear motor that meets the requirements.

How long is the customization cycle of linear modules?

The customization cycle depends on the complexity of the customization and the manufacturer's production capacity, generally about 1-4 weeks. The specific time can be determined by communicating with the manufacturer.

Can linear motors be upgraded?

The performance of linear motors can be improved by upgrading them with high-performance drives, optimizing control system parameters, and improving heat dissipation structures.

Is it easy to upgrade the linear module?

It is relatively easy to upgrade the motor, control system, guide rail and other components of the linear module according to actual needs to improve its performance and accuracy.

What is the after-sales maintenance service of linear motors?

Regular manufacturers usually provide comprehensive after-sales maintenance services, including fault diagnosis, maintenance guidance, parts replacement, etc., but the response speed and quality of after-sales maintenance services may vary from manufacturer to manufacturer.

What is the warranty period for linear modules?

The warranty period of linear modules from different manufacturers varies, generally around 1-2 years. The specific warranty period can be confirmed with the manufacturer at the time of purchase.

What should we pay attention to when integrating linear motors with other equipment?

Attention should be paid to issues such as interface compatibility, signal matching, control logic coordination, and installation space and layout between devices to ensure that the devices can work together.

Can the linear module be integrated with other equipment?

Absolutely. Linear modules can be integrated with other devices such as robots, sensors, and vision systems to build more complex and intelligent automated production lines.

What kind of control system do linear motors require?

Linear motors typically require a high-performance motion control system that can achieve precise position control, speed control, and thrust control, such as a dedicated linear motor drive with a motion control card or a high-end PLC.

Products

Direct Drive Rotary Motor-DDRE-140-50

Ⅰ. Product Overview

Ⅱ. Technical Features

Ⅲ. Application Fields

Ⅳ. Model Customization Options

Ⅴ. Product Advantages

Ⅵ. Installation & Maintenance

Ⅶ. Learn More

Related Products