ADRA HR-A063 Servo Actuator


  • Harmonic Reducer
  • 70N.m Max Torque
  • Repeatability ±0.005 ˚
  • Hollow Shaft
          ADRA will be shipped in 4-6 weeks (Except for the samples). If you have special needs, please contact us before placing an order.
SKU: N/A Categories: ,


Driving the revolutionary UTRA series is Umbratek’s ADRA series Actuator. Each ADRA Actuator is built to last and comes with a high-precision harmonic reducer made of high-strength aviation aluminum and high-carbon chromium steel.



A high-torque density, and compact structure enable the motor to be integrated into the actuator and lessens the actuator weight.

Each actuator is fitted with high-performance servo drivers, which use field-oriented control, to protect against overvoltage, overcurrent, over-temperature, reverse connection, undervoltage ESD, short-circuiting, and rotor lock. The ADRA series also uses dual GMR+TMR hybrid detection technology and comes with a 16-bit off-axis multi-turn absolute encoder.






Umbratek’s ADRA series actuators, integrating with harmonic reducer, can meet multiple requirements and be appliable to many tasks. It can not only build up a robot arm, quadruped robot, and humanoid robot, but also be used in industrial automation, logistic system, agricultural machinery, and so much more.


Umbratek Assistant

Umbratek Assistant offers a user-friendly graphic menu operating system with a real-time graphic display.

It gives you intuitive control of your ADRA series actuators.


The ADRA Series HR Actuator comes complete with:

  • ADRA HR Actuator (size dependent on order)
  • Power cable and communication cable


At Umbratek, we take pride in our attention to detail. Although we supply robotics at affordable prices, we care about the quality that we provide our customers.







Additional information

Weight 2 kg
Dimensions N/A
Reducer Ratio MaxTorque Velocity

Light-weight 50:1 34N.m 50RPM, Light-weight 80:1 43N.m 31RPM, Light-weight 100:1 54N.m 25RPM, Standard 50:1 35N.m 50RPM, Standard 80:1 56N.m 31RPM, Standard 100:1 70N.m 25RPM

Interface Type

RS485, CAN


Multi-turn ABS 16bit, Multi-turn ABS 19bit


Brake, Without Brake

You may also like…


welcome Back

Powering the Future of Robotics

Login to your account