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Name: Direct Drive Rotary Motor-DDRI-180-125
Brand: W-ROBOT

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Direct Drive Rotary Motor-DDRI-180-125

Motor Size ；180(D)*125(H)mm Cont Torque ；40.1N.m Peak Torque ；120N.m Cont/Peak CUR ；4.5/13.5A-rms

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DDRI Series (Internal Rotor Motor)

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DDRI-180-125 Direct Drive Rotary Motor
Ultra-High Torque · Absolute Precision · Maintenance-Free Design
Ⅰ. Product Overview
The DDRI-180-125 from W-Robot is a high-torque direct drive rotary motor engineered for precision automation, semiconductor processing, and heavy-duty robotic motion control applications.
With a 180 mm frame diameter and 125 mm body height, this model delivers significantly higher torque compared to standard rotary motors in the same size class, achieving peak torque levels exceeding 120 Nm while maintaining ultra-smooth, backlash-free rotation.
Powered by a coreless stator design and high-resolution absolute encoder, the DDRI-180-125 provides micron-level angular positioning accuracy, making it ideal for demanding motion systems such as wafer handling, optical inspection, or large-axis robotic joints. Its direct-drive architecture eliminates gear wear, ensuring zero backlash, zero mechanical loss, and nearly silent operation over a long service life.
Ⅱ. Technical Features
Direct Drive Technology: No belts or gears — ensures zero mechanical backlash and high rigidity.
Ultra-High Torque Density: Continuous torque up to 40 Nm, peak torque up to 120 Nm.
High-Resolution Encoder: Supports 23-bit to 26-bit absolute encoder options for sub-arcsecond accuracy.
Low Cogging Design: Advanced electromagnetic optimization ensures smooth rotation at low speeds.
Superior Dynamic Response: Fast acceleration and braking performance for rapid indexing.
Thermally Optimized Housing: Built-in cooling channels enable stable operation in high-duty cycles.
Compact Integration: Compatible with both vertical and horizontal mount configurations.
Maintenance-Free: No lubricants or mechanical transmission components required.
Ⅲ. Application Fields
The DDRI-180-125 excels in applications where precision, torque, and stability are essential:
Semiconductor wafer processing and alignment systems
High-precision CNC rotary tables and indexing platforms
Robotic base rotation and heavy payload axis systems
Optical and laser machining equipment
Medical imaging systems and automated analysis devices
Precision metrology and calibration instruments
By delivering consistent torque and zero backlash, the DDRI-180-125 ensures perfect repeatability and accuracy, even in the most challenging environments.
Ⅳ. Model Selection & Customization
W-Robot offers modular customization options to match every unique automation requirement:
Custom torque output and moment of inertia configurations
Encoder options: Incremental, Absolute (Single / Multi-turn), or Optical / Magnetic
Hollow-shaft or solid-shaft options for cable or fluid routing
Custom flange and mounting designs
Optional integrated servo drive (EtherCAT / CANopen support)
Cooling system options (natural convection, forced air, or liquid cooling)
CAD files (2D/3D), torque curves, and full datasheets available on request
Ⅴ. Product Advantages
Zero Backlash: Delivers perfect transmission accuracy and stability.
High Torque & Compact Form: Power-dense motor for limited-space applications.
Frictionless Operation: Enables high reliability and silent motion.
High Responsiveness: Ideal for fast dynamic control and precision alignment.
Long Service Life: No mechanical wear, reducing downtime and maintenance costs.
Superior Thermal Management: Consistent performance under continuous duty.
Ⅵ. Installation & Maintenance
Ensure the mounting surface is flat and vibration-free before installation.
Apply correct torque to all mounting bolts to maintain mechanical stability.
Avoid applying side or axial loads directly on the motor shaft.
Keep all connectors clean and avoid excessive cable stress.
Periodically inspect encoder calibration (recommended every 12–18 months).
Operate within specified temperature and humidity limits for maximum performance.
The direct-drive structure requires no lubrication or mechanical maintenance, ensuring long-term reliability and precision.
Ⅶ. Learn More
Explore more with W-Robot:
Visit www.w-robot.com for datasheets, CAD files, and detailed specifications
Read: “Direct Drive Technology — Redefining Precision in Industrial Automation”
Contact W-Robot’s technical support team for integration and selection assistance
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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.

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-DDRI-180-125

DDRI-180-125 Direct Drive Rotary Motor

Ⅰ. Product Overview

Ⅱ. Technical Features

Ⅲ. Application Fields

Ⅳ. Model Selection & Customization

Ⅴ. Product Advantages

Ⅵ. Installation & Maintenance

Ⅶ. Learn More

Related Products