OpenArm 02
6 500 USD
OpenArm
An open-source, human-scale robotic arm from Tokyo’s Enactic, built for physical AI research, teleoperation, and reproducible robot-learning benchmarks.
Skill Score
2
Specifications and details:
| Availability | In production |
|---|---|
| Nationality | Japan |
| Website | https://openarm.dev/ |
| Degrees of freedom, overall | 14 |
| Degrees of freedom, hands | 1 DoF grippers each hand |
| Height [cm] | N/A |
| Max speed (km/h) | 0 |
| Strength [kg] | 15 |
| Weight [kg] | 30 |
| Runtime pr charge (hours) | N/A |
| Safe with humans | Yes |
| CPU/GPU | N/A |
| Ingress protection | N/A |
| Camera resolution | Built-in in-hand RGB camera on the gripper (resolution unpublished), optional ZED-121210 stereo camera add-on for a top-down workspace view |
| Connectivity | CAN-FD control bus (1 kHz), wired — no built-in Wi-Fi/Bluetooth, networking depends on the host computer |
| Operating system | None onboard; driven from a Linux host (Ubuntu 22.04/24.04) via ROS 2 and SocketCAN |
| LLM integration | Compatible with external vision-language-action (VLA) models via Hugging Face's LeRobot and similar frameworks, run on the user's own compute |
| Latency glass to action | Not a fixed hardware spec — depends on the external AI model and host PC. The CAN-FD control bus itself runs at 1 kHz (1 ms cycle) |
| Motor tech | DAMIAO quasi-direct-drive (QDD) brushless motors (DM-J4310, DM-J8009P), plus one higher-torque non-QDD motor (DM4340) at the base joint |
| Gear tech | Low-ratio planetary gearboxes (9:1 to 40:1 depending on joint), which preserve backdrivability |
| Main structural material | Aluminum and stainless steel, with MISUMI aluminum-frame support pillars |
| Number of fingers | 2-finger gripping claws |
| Main market | physical-AI/embodied-AI teams worldwide — data collection, teleoperation, and VLA model training, Robotics research labs, universities |
| Verified | Not verified |
| Walking Speed [km/h] | 0 |
| Shipping Size | N/A |
| Manufacturer | OpenArm |
Description
Enactic builds OpenArm, and the Tokyo-based startup designed it as an open-source arm for physical AI research. Unlike closed commercial platforms, every part of OpenArm stays public: CAD files, firmware, control code, and simulation tools. Researchers can build their own unit, or buy one fully assembled from manufacturers worldwide. That openness sets OpenArm apart in a field where most hardware stays locked behind proprietary walls.
OpenArm looks and moves like a human arm, scaled to fit someone about 160 to 165 centimeters tall. Black aluminum segments form the arm itself, while a light aluminum frame holds it upright on a small base plate. A compact gripper sits at the end, with two parallel fingers and a tiny camera built right into the case. As a result, the in-hand camera lets it see exactly what it grips, sharpening data quality for AI training. OpenArm has no legs, wheels, or wings. Bolted to a table or bench, it stays fixed in one spot rather than roaming a room.
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Engineers built OpenArm mainly for two jobs: collecting robot training data and running fair, repeatable AI evaluations. Its backdrivable motors let it yield to touch, so operators can guide it by hand during teleoperation. OpenArm Cell, a standardized testing rig, lets teams compare AI models under identical lighting, camera angles, and starting positions. A separate accessory, OpenArm KER, adds a lightweight leader arm that mirrors the same joints for smoother, lower-fatigue control. Together, these pieces turn scattered lab experiments into results that other researchers can actually reproduce.
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OpenArm is already for sale, not just a lab prototype, unlike many research robots still stuck in development. Enactic partners with manufacturers in Japan, China, and Taiwan, and prices for a two-arm setup start around 6,500 dollars. That price undercuts most commercial research arms by a wide margin, since comparable proprietary hardware often costs several times more. Universities, robotics labs, and AI startups make up the core audience, especially teams building vision-language-action models. Enactic itself uses OpenArm as a stepping stone toward Ena, its own planned care-facility humanoid. So the open hardware doubles as the company’s own research backbone.
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Website: docs.openarm.dev
