$300 120Nm robotic actuator from aliexpress - ROBSTRIDE04

Setup with Python:    • how to setup the ROBSTRIDE04 robotic ...  

I was browsing Aliexpress, as one does, and found a robotic actuator that advertised a peak torque of 120Nm. I checked out the spec sheet and it is rated to do 120Nm for 10s but its nominal torque rating is 40Nm. I’ve been trying to design my own actuator and this one being only about $260 ($300 after shipping/tax), blew my mind. I didn’t believe it. I wanted to order one but first I verified that it was at least kinda real.

The actuator is called the ROBSTRIDE04, from RobStride Dynamics. I found their Twitter account and found that they have two actuators, the ROBSTRIDE01 and ROBSTRIDE04. I found exactly two videos on the actuators being used, one for a quadruped, and one for a robotic arm. At this point, it was looking good. The company also seems to be by engineers from Xiaomi from their robotics team. I wanted to chat with them, but their Discord link is expired and DMs not open on twitter.

https://x.com/RobStride_com/status/18...

I went further and found their website, and verified that their CAD model worked (it did) and that the software to control the actuator worked. It took some tinkering to get it to be English (there is a configuration .xml in the directory with the .exe with a localization variable), but it seemed the software worked.

http://www.robstride.com

I ended up buying it and it was actually a week earlier than the expected date. I’ve done some simple tests like in the videos, and will be figuring out better was ways to test it soon, but my means are limited atm.

tl;dr found an unbelievable actuator advertised to have 120Nm of torque only costing $300 from aliexpress. Seems to be real, and works and has some impressive capabilities already and I haven’t even ran it at its rated 48V yet. (my power supply weak af)

arm video: https://x.com/sirwart/status/18114363...
quadruped video: https://x.com/RobStride_com/status/18...

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