PMDC Motor – DZ Series with Planetary Gear Box
Our DZ series PMDC Motor (Brushed DC Motor) is designed for demanding motion control applications and can be optionally integrated with a planetary gearbox to deliver high torque, precision, and efficiency within a compact footprint. The combination of our DZ series PMDC Motor and planetary gearboxes ensures excellent torque transmission, outstanding reliability, and multiple gear ratio options for versatile system integration.
The DZ series PMDC motor provides stable speed regulation, quick dynamic response, and strong starting torque, while the planetary gearbox offers high torque density and exceptional transmission efficiency. Its multi-stage planetary gear structure ensures smooth operation with minimal backlash and superior load distribution — ideal for applications that require precision control and long service life.
Featuring a high-strength steel and aluminum alloy construction, the planetary gearbox delivers excellent durability and heat dissipation while maintaining a compact and lightweight design. Together, the DZ series PMDC motor and planetary gearbox form a robust, efficient, and maintenance-friendly drive solution, perfectly suited for robotics, medical devices, laboratory automation, and other industrial applications where space efficiency and performance consistency are essential.
1.Motor Coupling Plate
2.Ring Gear
3.Sun Gear
4.Planet Gear
5.Planet Frame
6.Output Shaft
7.Ball Bearing
8.Front Cover
United Motion Inc. is not only the authorized distributor in North America, but also a sister company of Greensky Power Company.
We have a manufacturing facility in China which has been operated for over 15 years, with a new facility in Thailand under construction.
FAQ for Planetary Gear Motor
A PMDC planetary gear motor combines a permanent magnet DC motor with a planetary gearbox to deliver high output torque at lower speeds. Compared with a standard DC motor, it provides better torque density, higher transmission efficiency, and a more compact structure, making it ideal for automation, robotics, medical equipment, and industrial motion control applications.
Planetary gearboxes distribute the load across multiple gears, allowing them to transmit higher torque in a smaller package. They also offer higher efficiency, lower backlash, quieter operation, and a longer service life than conventional spur gearboxes, making them suitable for precision and heavy-duty applications.
Our planetary gear motors are designed for long-term industrial operation. When properly selected and operated within the recommended load and environmental conditions, they provide reliable performance over thousands of operating hours with minimal maintenance requirements.
The ideal gear ratio depends on your required output speed, torque, and application load. Lower gear ratios provide higher speed, while higher gear ratios increase output torque and reduce speed. Our engineering team can recommend the most suitable ratio based on your operating requirements and installation conditions.
Yes. Encoder options are available for applications requiring accurate speed or position feedback. We can integrate Hall sensors, magnetic encoders, or optical encoders to support closed-loop motion control in robotics, AGVs, medical equipment, and other precision automation systems.
UNITED MOTION INC. provides high-quality PMDC planetary gear motors backed by over 15 years of manufacturing experience. With production facilities in China and Thailand, comprehensive OEM customization capabilities, and engineering support for global customers, we deliver reliable motion solutions for a wide range of industrial applications.
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Customer Service
United Motion Inc.’s motion solution apply in diverse areas all around the world.
Our sales and engineering support teams are ready to assist you with any questions, including quotation, application support, and product configuration.
Please submit your requirements through our Custom Service Form to ensure a faster response. Contact us by calling +1(857)250-1370 or you can reach us at info@unitedmotioninc.com for general inquiries.
Tell Us About Your Application Requirements
United Motion Inc welcomes inquiries and challenges. If you find our standard products cannot meet your need, please feel free to contact us for customization. Our professional engineering and service team will quickly review your need and propose a solution if we can make it.
We look forward to communicating and collaborating with you!



















