RDrive Servo Motors in Figures and Features

Rozum Robotics high-torque servomotors feature high power density in compact design. The layout of the motor includes a brushless motor, 2 magnetic encoders, controller and a strain-wave gear - all set in a single housing. 

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. 


Order servo motor

Technical specifications of RDrive servos

The RDrive series includes a few high-torque hollow-shaft models with the following performance characteristics and dimensions:


Model      RDrive 50      RDrive 60              RDrive 70              RDrive 85              RDrive 110    




65 W


225 W


155 W


450 W

  680 W  




11 Nm


39 Nm


49 Nm


108 Nm

  216 Nm  

Peak torque



28 Nm


54 Nm


82 Nm


157 Nm

  333 Nm  

Rated rotation speed



55 rpm


55 rpm 


30 rpm


40 rpm

  40 rpm  




53 mm


63  mm


73 mm


88 mm

  115 mm  




85 mm


89 mm


105 mm


112 mm

  150 mm  

Hollow shaft diameter



9 mm


11 mm


13 mm


13 mm

  17 mm  




600 g


900 g


1300 g


2100 g

  3900 g  




48 V


48 V


48 V


48 V

  48 V  



2 290,00 $


2 590,00 $


3 100,00 $


3 400,00 $

  4 290,00 $  





Gearless models











Work conditions:  


0 °C to +35 °С 

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


Detailed technical characteristics

Advantages of RDrive servos

   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


To ensure safe and correct operation of RDrive servo motors in designed load rangestheir supply circuits must include at least one energy eater and one or more capacitors. Rozum Robotics has combined the components into a customizable servobox solution that you can order as an option.

Place an Order


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 ONLINE