ARX X5 / R5 Arm

A lightweight, force-controlled 6-axis arm from Beijing's ARX, popular for imitation-learning research.

ARX was founded in Beijing in 2023; the X5, also called ARX5 early on, is its ultra-lightweight, force-controlled 6-DoF arm, weighing about 3.3 kg including the gripper, with a rated payload of about 2 kg and a reported launch price of about RMB 60,000 per unit. R5 is a later 6-DoF model, and there is also a cheaper L5 series, reportedly around RMB 29,800 per unit. Its selling points are being light, inexpensive, and force-controllable at every joint, making it easy to mount on a mobile base or a quadruped, and convenient for building leader-follower teleoperation rigs. Stanford's REAL lab open-sourced arx5-sdk, a C++/Python control interface, and studies such as UMI on Legs and UVA have used it in experiments, giving it heavy exposure in embodied-AI data collection and policy replication work.

ExampleUMI on Legs mounts an ARX5 arm on the back of a Unitree quadruped, training a mobile-manipulation policy on data collected with a handheld gripper.

Also called

ARX Arm, ARX5

Related

Robotic Arm · 6-Axis Robot Arm · AgileX PiPER · UMI on Legs · Leader-Follower Teleoperation · Desktop Robot Arm

Sources

方舟无限新品发布（机器人大讲堂） (Chinese)
real-stanford/arx5-sdk

As of

2026-09