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Direct Drive Rotary Motor-DDRI-180-055

Continuous torque ；N.m ；14.0 Continuous current ；A rms ；4.5 Maximum torque Maximum torque ；N.m ；42.0 Maximum current ；A rms ；13.5 Torque constant Torque constant ；Nm/A rms ；3.1 Resistance ；Ohm (25°C) ；2.4 Inductance ；mH (25°C) ；7.6

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DDRI Series (Internal Rotor Motor)

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DDRI-180-055 Direct Drive Rotary Motor
High Torque · Precision Positioning · Zero Backlash
Ⅰ. Product Overview
The DDRI-180-055 from W-Robot is a high-torque direct drive rotary motor developed for industrial automation, robotics, and semiconductor manufacturing applications that demand high accuracy, rigidity, and smooth motion.
Featuring a large 180 mm frame size and 55 mm body height, this motor offers superior torque output and dynamic response. Its direct-drive structure eliminates the need for mechanical transmission elements like gearboxes, delivering zero backlash, no wear, and instantaneous torque transmission. The integrated high-resolution encoder provides micron-level precision, ideal for motion control systems requiring superior stability and repeatability.
The DDRI-180-055 combines high torque density, low cogging, and excellent thermal management, making it a premium solution for precision rotary tables, robotic axes, and high-performance positioning systems.
Ⅱ. Technical Features
Direct Drive Design: Ensures zero backlash and no mechanical wear, enhancing precision and longevity.
High Torque Output: Continuous torque up to 15 Nm, peak torque over 45 Nm, enabling heavy-load and dynamic operations.
High-Resolution Encoder: Built-in absolute or incremental encoder for sub-micron positioning feedback.
Low Cogging & Smooth Rotation: Optimized magnetic circuit ensures consistent torque ripple suppression.
Compact but Powerful: 180 mm diameter frame with optimized weight for easy integration.
Maintenance-Free Operation: No belts, gears, or lubrication needed.
Flexible Mounting: Suitable for both vertical and horizontal orientations; customizable shaft configuration.
Thermal Efficiency: Integrated cooling channel ensures continuous operation under high duty cycles.
Ⅲ. Application Fields
The DDRI-180-055 Direct Drive Rotary Motor is widely used in high-precision and high-load applications such as:
CNC rotary tables and indexing systems
Semiconductor wafer alignment and inspection platforms
Robotic base and rotary joints for heavy-duty automation arms
Optical positioning and scanning equipment
High-accuracy measuring and metrology systems
Assembly and dispensing machinery requiring fine torque control
This model’s rigidity, torque density, and dynamic stability make it ideal for automation systems where accuracy, speed, and efficiency must coexist.
Ⅳ. Model Selection & Customization
W-Robot supports a full range of customization and configuration options for the DDRI series:
Torque and inertia adjustment based on application dynamics
Encoder signal type (incremental / absolute / multi-turn absolute)
Shaft type: solid, hollow, or through-bore for cable/pneumatic routing
Custom flange, connector orientation, and mounting interface
Optional integrated servo drive and EtherCAT / CANopen communication support
Cooling configuration: natural convection or forced air cooling
2D/3D CAD files and detailed performance charts available upon request
Ⅴ. Product Advantages
Zero backlash ensures pure torque transfer and ultra-smooth motion
High torque density in a compact housing
High dynamic response for rapid acceleration and deceleration
No mechanical wear, extending service life and reducing downtime
Excellent thermal stability, maintaining performance under heavy load
Quiet operation suitable for cleanroom and precision assembly environments
Ⅵ. Installation & Maintenance
To maintain optimal performance:
Ensure the mounting base is flat, rigid, and stable.
Follow the recommended torque settings when fixing motor bolts.
Avoid excessive axial or radial loading on the output shaft.
Keep connectors and cables secure and free from bending stress.
Periodically check encoder calibration (typically every 12–18 months).
Maintain operation within rated temperature and humidity limits.
The direct-drive structure requires minimal maintenance, offering unmatched reliability for continuous operation in precision automation systems.
Ⅶ. Learn More
Explore more with W-Robot:
Visit www.w-robot.com for CAD models, datasheets, and performance charts
Read the technical insight: “Direct Drive Motors — The Core of Modern Precision Automation”
Contact W-Robot’s engineering team for selection support and integration 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-180-055

DDRI-180-055 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