RDrive Servo Motors in Figures and Features

We have built RDrive servos with quality in mind, using top-grade materials (e.g., rare-earth magnets, electrotechnical steel). The brushless motor, controller, and encoders are of our own design, so the manufacturing process—from welding the stator plates to assembling components into a housing—remains under our control for the majority of our components.

Rozum Robotics servomotors lifecycle is 35 000 hours of non-stop work. It is defined through accelerated endurance testing with dynamic load. Endurance test protocol with procedure details and parameters received is available for download:

Endurance Test Protocol

Technical specifications of RDrive servos

The RDrive series includes four basic high-torque hollow-shaft models—RD50, RD60, RD70, RD85—with the following performance characteristics and dimensions:


Model      RD50      RD60              RD70      RD85    




80 W


160 W


205 W


450 W





14 Nm


34 Nm


49 Nm


108 Nm


Peak torque



28 Nm


47 Nm


82 Nm


157 Nm


Rated rotation speed



55 rpm


45 rpm 


40 rpm


40 rpm





53 mm


63  mm


73 mm


88 mm





85 mm


89 mm


96 mm


112 mm


Hollow shaft diameter



9 mm


11 mm


13 mm


13 mm





440 g


600 g


920 g


1520 g





48 V


48 V


48 V


48 V



Work conditions:  


-10 °C to +45 °С

  Interface: CAN  
  API: C/C++/C#/Java/Python/ROS  
  Encoder: 2x19 bit, magnetic, absolute position  


Detailed technical characteristics


   RDrive Features               Benefits

Compact size and hollow-shaft design



  • Servo takes up less space in your machine
  • Seamless integration into your infrastructure
  Motion provided by a brushless AC motor with thermal sensors  
  • High power density
  • Thermal overload protection
  • Low cogging
  Two built-in absolute magnetic encoders with a resolution of 19-bit  
  • Continuous feedback on servo’s speed and torque
  • The accuracy of measurements, including in heavy-duty industrial environments (e.g., at high humidity or dust levels)
  • Motor position is always known, even after a power outage
  • Positioning with a precision of 0.01 degree

An integrated harmonic drive gearbox with a gear ratio of 1:100 and an almost-zero backlash

  • Enhanced servo performance and efficiency
  • A possibility to adjust torque output and speed to your exact requirements
  A controller integrated into the housing  
  • Highly dynamic response to control commands
  • Precision motion control based on feedback signals from encoders
  CAN interface  
  • Efficient and high-speed communication with a control device
  • Possible integration of multiple servo motors into a CAN network, enabling their control from a single device
  API control  
  • A possibility to use your preferred technology stack to implement motion control—C / C++ / C# / Java / Python / ROS


The list is just some of the applications that can benefit from our products. We believe that our high-torque servo motor can enhance your application for your unique products, and we are ready to provide you assistance to get the job done! 


 Possible applications of RDrive servos

In the RDrive series, both modeling enthusiasts and industrial manufacturers can find a servo motor to fit their needs. Possible applications include:

  • Model aircraft, cars, etc.
  • Robots and drones
  • Conveyor belts, sorting or assembly lines
  • Packing equipment
  • Solar batteries
  • Metalworking and moulding machines
  • Rotary antennas
  • Woodworking machinery
  • 3D printers
  • Storage equipment


You can order an RDrive servo online or contact us to discuss your specific needs. 

Buy Rdrive Servo