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Direct Drive Rotary Motor – DDRE-170-125

Direct Drive Rotary Motor – DDRE-170-125

Motor Size ；170(D)*125(H)mm Cont Torque ；41.8N.m Peak Torque ；125N.m Cont/Peak CUR ；2.5/7.5A-rms

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DDRE Series (External Rotor Motor)

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DDRE-170-125 Direct Drive Rotary Motor
Ultra-High Torque · Large Hollow Shaft · Precision Motion for Advanced Automation
Ⅰ. Product Overview
The DDRE-170-125 from W-Robot is a large-aperture, high-torque direct drive rotary motor built for industrial applications that demand extreme accuracy, smooth torque output, and rigid mechanical performance. With an outer diameter of 170 mm and a large 125 mm hollow shaft, this model provides unmatched flexibility for integrating cables, vision systems, or pneumatic tubing directly through the motor center—making it ideal for robotic joints, indexing tables, and semiconductor handling systems.
Leveraging a direct-drive structure, the DDRE-170-125 eliminates gear backlash and mechanical losses, achieving zero transmission error, high dynamic response, and exceptional rotational precision. It’s optimized for equipment that requires quiet operation, long life, and minimal maintenance, all while delivering high torque density and superior stiffness.
Ⅱ. Technical Features
Direct Drive Mechanism: Eliminates mechanical backlash and transmission loss, ensuring lifetime precision.
125 mm Large Hollow Shaft: Simplifies integration for cable routing, cooling lines, or optical components.
High Torque Density: Advanced electromagnetic design provides powerful torque with low heat output.
Ultra-Smooth Motion: Cogging-minimized design for stable performance at ultra-low speeds.
Precision Feedback: Supports high-resolution absolute or incremental encoders.
Compact, Robust Frame (Ø170 mm): Ideal for tight-space installations and robot joint applications.
Maintenance-Free: No gears or belts; completely silent and lubrication-free.
Ⅲ. Application Fields
The DDRE-170-125 direct drive rotary motor is ideal for precision applications requiring stability, torque, and quiet operation. Key fields include:
Robotic arms and collaborative robot joints
Rotary indexing systems and positioning platforms
Semiconductor wafer handling & metrology
Optical inspection and scanning systems
Medical imaging and diagnostic automation
High-precision packaging or labeling machines
Its combination of large aperture, torque accuracy, and direct-drive design makes it an excellent choice for next-generation automation platforms.
Ⅳ. Model Selection & Customization
W-Robot provides full customization to meet specific project requirements:
Encoder Options: Absolute, incremental, or high-resolution serial encoders
Torque Customization: Adjusted for your load, speed, and acceleration profile
Cooling Configurations: Natural, forced-air, or liquid-cooled
Mounting Interfaces: Tailored flanges and shaft designs for OEM integration
Integrated Drive (Optional): Built-in servo control and communication
Multi-Axis Compatibility: Easily pairs with linear modules for gantry or SCARA systems
Ⅴ. Product Advantages
Zero mechanical backlash for high-precision angular positioning
Large 125 mm hollow center ideal for cable or tooling pass-through
High torque with excellent dynamic response
Smooth and quiet motion — suitable for cleanroom environments
Compact yet rigid structure for demanding mechanical setups
Maintenance-free operation with long service life
Ⅵ. Installation & Maintenance
Install on a rigid, vibration-free mounting base
Ensure precise alignment between motor shaft and load
Apply specified torque values to all mounting screws
Keep hollow shaft and encoder clean and free of debris
Avoid condensation, magnetic interference, and high humidity
Check encoder calibration and electrical connections periodically
Ⅶ. Learn More
Discover more with W-Robot:
Visit: www.w-robot.com for DDRE Series product catalogs and 3D CAD downloads
Read: “Direct Drive Motor Technology in Modern Industrial Robotics”
Contact W-Robot’s application engineers for professional model selection and integration support
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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-170-125

Ⅰ. Product Overview

Ⅱ. Technical Features

Ⅲ. Application Fields

Ⅳ. Model Selection & Customization

Ⅴ. Product Advantages

Ⅵ. Installation & Maintenance

Ⅶ. Learn More

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