EtherCAT motor RMD-X8-P20-120-E

Buy High Precision EtherCAT RMD-X8-P20-120-E Servo Motor for Robotics and Advanced Drones

This integrated servo motor with planetary gearbox is designed specifically for robotic applications that require maximum precision and power. The RMD-X8-P20-120-E model from the Chinese brand MyActuator combines a brushless motor, a high-precision gearbox, a dual absolute encoder and a built-in driver with support for EtherCAT and CAN BUS protocols in a compact package. Designed for humanoid robots, walking platforms, and robotic arms, this solution is also ideal for heavy-duty cargo drones that require precise control of gimbals and actuators..

5 main advantages of the engine

• 120 Nm peak torque for heavy-duty applications.
• Dual absolute encoder (17 bit input, 18 bit output) for <0.01° accuracy.
• EtherCAT and CAN BUS support for flexible integration into any system.
• Hollow shaft and compact design for easy cable management.
• Built-in protection against overheating, overload and overvoltage.

Built-in brushless motor creates torque. Planetary gearbox with 19.612 gear ratio increases force and reduces speed to a nominal 127 rpm. Dual anchors track the input and output position of the gearbox, providing control accuracy down to 0.01 degrees. The built-in driver processes commands via EtherCAT or CAN BUS, adjusts PID and transmits telemetry. Output cross roller bearing can withstand axial and radial loads up to 4.5 kN. The hollow shaft makes it easier to route wires inside the assembly.

Technical characteristics and features of the model

Input voltage is 48V DC. Nominal torque reaches 43 Nm, peak torque – 120 Nm. Rated output power is 574 W. Idle speed - 158 rpm, nominal - 127 rpm. Engine efficiency is 79%. Gearbox backlash does not exceed 10 arc minutes.

Module weight - 1.4 kg. The case is protected from dust and moisture. The firmware is updated remotely, software is available for debugging and setting parameters. The model is equipped with protection against overheating, overcurrent, overvoltage and overspeed.

About the manufacturer MyActuator

MyActuator is based in Suzhou, China and specializes in developing compact and lightweight servos for robotics applications.. The brand is known for its RMD-X series - integrated planetary servos designed specifically for humanoid robots. MyActuator products feature high power density, intelligent design and support for industrial communications protocols. X series modules are available in several standard sizes (X2, X4, X6, X8, X12, X15), which allows you to choose the optimal solution for a specific task.

Choose servo motor RMD-X8-P20-120-E in the COPTERPARTS store. Your robot or heavy drone will receive precision control and exceptional reliability. Order this engine for your advanced projects today.

• Gear ratio: 19.612
• Input voltage: 48V
• Idle speed: 158 rpm
• No-load current: 1.6 A
• Rated speed: 127 rpm
• Rated torque: 43 Nm
• Rated output power: 574W
• Nominal phase current: 17.6 A (rms)
• Peak torque: 120 Nm
• Peak phase current: 43.8 A (rms)
• Efficiency: 79%
• Constant motor back EMF: 19.2 V DC. current / kob/min
• Module torque constant: 2.4 Nm/A
• Motor phase resistance: 0.18 Ohm
• Motor phase inductance: 0.31 mH
• Number of pole pairs: 10
• Three phase connection diagram: star (Y)
• Reverse torque: 3.21 Nm
• Backlash: 10 arc minutes
• Output bearing type: cross roller
• Axial load (tensile): 4 kN
• Axial load (compression): 1 kN
• Radial load: 4.5 kN
• Moment of inertia: 1.5 kg cm²
• Encoder type: dual encoder, absolute 17 bits (input) / 18 bits (output)
• Control accuracy: <0.01 degree
• Communication interface: CAN BUS (version C) or EtherCAT (version E)
• Weight: 1.4 kg
• Insulation class: F