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Name: Direct Drive Rotary Motor-DDR-I-120-050
Brand: W-ROBOT

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Direct Drive Rotary Motor-DDR-I-120-050

Continuous torque ；N.m ；3.5 Continuous current ；A rms ；1.2 Maximum torque Maximum torque ；N.m ；10.5 Maximum current ；A rms ；3.5 Torque constant Torque constant ；Nm/A rms ；3.0 Resistance ；Ohm (25°C) ；27.6 Inductance ；mH (25°C) ；18.7

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DDRI Series (Internal Rotor Motor)

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DDRI-120-050 Direct Drive Rotary Motor
High Torque · High Precision · Zero Backlash Performance
Ⅰ. Product Overview
The DDRI-120-050 from W-Robot is a high-torque Direct Drive Rotary Motor designed for precision rotary motion in demanding automation and robotic applications. With a 120 mm frame diameter and 50 mm body height, it delivers an excellent balance of torque density, accuracy, and thermal stability, making it ideal for high-load, high-precision operations such as robotic joints, index tables, and inspection equipment.
By directly coupling the rotor to the load, the DDRI-120-050 eliminates traditional mechanical transmission elements like gears or belts, ensuring zero backlash, no hysteresis, and high dynamic responsiveness. Its integrated high-resolution encoder provides ultra-accurate feedback for superior control performance, while the compact form factor simplifies mechanical integration.
Ⅱ. Technical Features
Direct Drive Architecture: Eliminates backlash, offering pure torque transfer and smooth motion.
High Torque Output: Continuous torque up to 5.0 Nm, peak torque over 15 Nm, suitable for high-duty cycles.
Compact & Rigid Housing: 120 mm frame diameter with robust aluminum body for excellent stiffness and heat dissipation.
High-Resolution Encoder: Built-in precision encoder ensures exceptional position repeatability and control accuracy.
Low Vibration & Noise: Ideal for precision machinery, metrology, and optical inspection.
Maintenance-Free Design: No mechanical wear components — ensuring long life and stable performance.
Flexible Integration: Compatible with both vertical and horizontal mounting; multiple shaft options available.
Ⅲ. Application Fields
The DDRI-120-050 Direct Drive Rotary Motor is suitable for a wide range of precision automation systems, including:
Semiconductor wafer alignment and handling platforms
High-precision rotary stages for optical and vision systems
Robotic wrist joints and collaborative robot bases
Index tables and tool changers for CNC and machining centers
Laser marking and dispensing equipment
High-speed assembly and measurement machinery
Its zero-backlash, direct torque transmission, and high dynamic stiffness make it a preferred solution in industrial and scientific automation requiring exact positioning control.
Ⅳ. Model Selection & Customization
W-Robot provides flexible customization to meet specific integration needs:
Torque and inertia tuning for your dynamic load requirements
Encoder resolution and signal output (incremental or absolute type)
Shaft configuration: hollow or solid type for wiring/pneumatics routing
Cooling method: natural or air-cooled options
Optional integrated servo drive and EtherCAT communication interface
Mounting flange and connector position customization
Comprehensive CAD models (2D/3D) and performance data sheets are available upon request.
Ⅴ. Product Advantages
Zero mechanical backlash and exceptional torque stability
Compact form factor with excellent torque-to-weight ratio
High dynamic response for fast acceleration and deceleration
Integrated encoder for direct and precise position feedback
Long lifespan with no lubrication or mechanical wear
Quiet and smooth operation suitable for cleanroom or lab environments
Ⅵ. Installation & Maintenance
To ensure stable operation and long service life:
Mount the motor on a flat and rigid base to maintain alignment accuracy.
Follow specified tightening torque values for bolts and couplings.
Avoid excessive axial or radial loads on the output shaft.
Route cables carefully to prevent stress or bending at connector points.
Keep the installation environment clean, dry, and temperature-controlled.
Periodically check encoder connection integrity and calibration (every 12–18 months).
With its direct-drive design, the DDRI-120-050 requires virtually no maintenance, offering continuous reliability in high-precision motion systems.
Ⅶ. Learn More
Discover more from W-Robot:
Visit www.w-robot.com for product specifications and CAD downloads
Read our article: “Direct Drive Rotary Motors — The Future of Precision Motion Control”
Contact W-Robot’s technical team for expert guidance on selection and integration
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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-DDR-I-120-050

DDRI-120-050 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