Integrated robot joint actuatorDiscontinued
MYACTUATOR RMD-X V2/V3 (earlier models) integrated robot joint actuator
Earlier RMD-X planetary joint actuators with single encoders and CAN bus/RS485 (for example X6-40, X8-25 and X10-100), now marked discontinued on MYACTUATOR's series page.
MYACTUATOR lists this series as discontinued. We can help with spares for installed machines, a migration to the replacement, or an alternative. Find a replacement.
Key specifications
| Data / bus | CAN bus, RS485 |
|---|---|
| Sizes | X6-7, X6-40, X8-25, X10-100 |
| Encoder | single encoder |
Summarised in our own words from Suzhou Micro Actuator Technology Co., Ltd.'s published data; series maxima, individual models vary. Last checked 2026-10-30. Source 1
Notes on this data
Series page (2026-10-30) marks X6-7, X6-40, X8-25 and X10-100 discontinued. No replacement named by the maker.
Specify Motion is not affiliated with Suzhou Micro Actuator Technology Co., Ltd.. MYACTUATOR and RMD-X V2/V3 (earlier models) are used only to identify the product. Comparisons use published figures; always confirm against the current datasheet.
Typical applications
Engineer support
Speak to our engineers about your project
Our experienced engineers are on hand, ready to help with your project. Whether you need the MYACTUATOR RMD-X V2/V3 (earlier models) itself, help sourcing it, or a modified or custom design built around your load, speed and space, tell us what the machine has to do and we'll come back with the right option.
- Help sourcing RMD-X V2/V3 (earlier models) and spares for installed machines
- Modified and custom designs when a catalogue part doesn't fit
- Complete axis: motor, drive, gearing and feedback matched together
What an integrated robot joint actuator is
An integrated robot joint actuator packages a brushless motor, a reduction gear, encoders, a servo drive and often a brake or torque sensor into one module that bolts in as a robot joint. Gearing may be planetary, strain-wave or cycloidal. Many are designed for legged robots, humanoids and cobots, with low gear ratios or quasi-direct drive to keep the joint back-drivable and responsive. Communication is typically over CAN or EtherCAT, with position, velocity and torque control modes.
When engineers choose an integrated robot joint actuator
Choose an integrated joint actuator to build robots faster with fewer parts, especially legged, humanoid, exoskeleton and collaborative robots. Back-drivable versions suit force control and impacts. The trade-offs are torque density, precision and industrial qualification: low-ratio designs trade output torque for transparency, and some units are aimed at research rather than production duty. For industrial arms with heavy duty cycles, a dedicated harmonic actuator or motor and gear set may be better.
How to specify the MYACTUATOR RMD-X V2/V3 (earlier models)
Send these with your enquiry and an engineer can confirm the right RMD-X V2/V3 (earlier models) variant or an equivalent:
- Peak and continuous output torque (Nm)
- Output speed (rpm)
- Gear type and ratio
- Back-drivability and torque sensing
- Supply voltage (V DC)
- Communication interface and control modes
- Mass and size (kg, mm)
Common mistakes to avoid
- Using peak torque as continuous torque
- Ignoring thermal limits in legged robots
- Overlooking bus bandwidth with many joints
- Assuming research-grade units meet industrial life requirements
MYACTUATOR RMD-X V2/V3 (earlier models): frequently asked questions
What is the MYACTUATOR RMD-X V2/V3 (earlier models)?
Earlier RMD-X planetary joint actuators with single encoders and CAN bus/RS485 (for example X6-40, X8-25 and X10-100), now marked discontinued on MYACTUATOR's series page. It is made by Suzhou Micro Actuator Technology Co., Ltd.; Specify Motion can help source it or propose an equivalent.
Who makes the MYACTUATOR RMD-X V2/V3 (earlier models)?
The MYACTUATOR RMD-X V2/V3 (earlier models) is made by MYACTUATOR (Suzhou Micro Actuator Technology Co., Ltd.) and is listed here for engineers comparing options. Specify Motion is not affiliated with Suzhou Micro Actuator Technology Co., Ltd.; brand names are used only to identify the product.
Is the MYACTUATOR RMD-X V2/V3 (earlier models) still available?
MYACTUATOR lists the RMD-X V2/V3 (earlier models) as discontinued. We can help with spares for installed machines, a migration, or an equivalent from our supply network that meets the same published figures.
What is a quasi-direct-drive actuator?
A quasi-direct-drive actuator uses a high-torque motor with a low gear ratio, typically below about 10:1, so the joint is back-drivable and responds quickly to external forces. This suits legged robots and force control. The trade-off is lower output torque than high-ratio joints of similar size.
Why integrate the drive in a robot joint actuator?
Integrating the drive reduces cabling and lets each joint communicate over a shared bus, which simplifies robot design. It also allows the drive to sit close to the motor, improving control. The trade-off is that heat from both motor and drive must be managed inside the joint.
Further reading: How to select a harmonic actuator · Frameless motor sizing robot joints · Gearboxes and harmonic drives
Other integrated robot joint actuator series
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Engineer support
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Tell us about your project and how you use the MYACTUATOR RMD-X V2/V3 (earlier models): the load, speed, duty and environment. An experienced engineer will review it and reply, normally within one working day.
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