OpenEAI-Arm
A 6-DoF serial desktop arm with an independently controlled end-effector channel, built from published mechanical design files for manipulation research.
Project documentation
Before you build
Five answers, each linked to its source
What does it cost?
About CN¥5,500documented manufacturing cost
The documented manufacturing cost is approximately CNY 5,500. README
Can I sell what I build?
YesCommercial use OK
Hardware BSD-3-Clause · Software BSD-3-Clause. Licensing source
What’s open?
4 of 6CAD: AvailableBOM: AvailablePCB: Not documentedCode: AvailableSim: AvailableGuide: Not documented
PCB, guide not documented. All six files
Is it maintained?
Active
Latest activity Oct 17, 2026 · main repo last commit Sep 19, 2026 · 157 commits in the last 52 weeks · 4 contributors Activity
01 / Under the shell
The specifications.
Hardware, build and software on one sheet. Every fact links to where we found it.
OpenEAI-Arm is a 6-DoF serial robot arm with an independently controlled end-effector channel, designed for embodied-AI research, robot-control development, teleoperation, and manipulation. The repository provides STEP and STL hardware files, mechanical drawings, a BOM, a robot model, and a low-level control stack with ROS 2 integration.
Hardware
- Actuators
- Not documented Documentation
- Build
- Not documented · see the repository Documentation
- Active degrees of freedom
- 6 README
- End-effector control channels
- 1 README
Building it
- Hardware files
- STEP files, 3D-printable STL files, PDF drawings, a BOM in XLSX format, and assembly documentation are listed. README.md
02 / The files behind the robot
What’s open.
Six parts of the build, each checked separately. Gaps stay visible.
| Part | Status | What’s there | License | Source |
|---|---|---|---|---|
| CAD | Available | STEP-format hardware files and 3D-printable STL files. | Not documented | STEP/ |
| Bill of materials | Available | Bill of Materials in XLSX format. | Not documented | BOM.xlsx |
| Electronics | Not documented | Not documented | Not documented | No source found |
| Code | Available | Low-level control stack, C++ core library, Python bindings, and ROS 2 nodes. | Not documented | software/ |
| Simulation model | Available | URDF and SDF robot models. | Not documented | STEP.urdf |
| Assembly guide | Not documented | Not documented | Not documented | No source found |
03 / Know before you build
Can you sell it?
YesCommercial use OK
The whole repository, design files included, is BSD-3-Clause. You can build, modify and sell robots based on it, as long as you keep the license and copyright notices.
- Hardware
- BSD-3-Clause
- Software
- BSD-3-Clause
04 / The upstream project
Is it maintained?
ActiveLatest activity Oct 17, 2026, 13 days before the snapshot
The main repository’s last commit was Sep 19, 2026.
- Stars
- 141
- Forks
- 4
- Contributors
- 4
- Latest release
- None recorded
Snapshot captured Oct 30, 2026. Recorded figures, not live metrics. Active: activity within 90 days of the snapshot. Quiet: within a year. Dormant: longer.
05 / Parts & kits
A head start.
Maker-listed sellers only. No affiliate links or paid placement.
MAKER’S COST
About CN¥5,500
documented manufacturing cost
The documented manufacturing cost is approximately CNY 5,500.
READMEKit availability is not documented in our reviewed sources.
06 / Side by side
Compare with other arms.
The three arms with the closest documented maker’s cost. Same sources, same rules.
| Robot | Cost | Open files | Can I sell it? | Runs on | Maintained | Stars |
|---|---|---|---|---|---|---|
| OpenEAI-ArmThis roboteai-yeslab | About CN¥5,500documented manufacturing cost | 4 of 6 | YesHW BSD-3-Clause · SW BSD-3-Clause | ROS 2Python | ActiveOct 17, 2026 | 141 |
| Ark_BotRobotics-Ark | £348.12Amazon total | 4 of 6 | YesHW MIT · SW MIT | Python | DormantOct 13, 2025 | 32 |
| ALTO 3D Printed 6 Axis Robotic Arm (WIP)liaochikon | About $400total for the robot | 3 of 6 | YesHW MIT · SW MIT | Python | Not documented | — |
| PingTi Armnomorewzx | About $261single PingTi arm | 4 of 6 | YesHW Apache-2.0 · SW Apache-2.0 | LeRobot | ActiveOct 20, 2026 | 55 |
| This robotOpenEAI-Arm | Ark_Bot | ALTO 3D Printed 6 Axis Robotic Arm (WIP) |
|---|---|---|
| Cost | ||
| About CN¥5,500 | £348.12 | About $400 |
| Can I sell it? | ||
| Yes | Yes | Yes |
| Open files | ||
| 4 of 6 | 4 of 6 | 3 of 6 |
| Runs on | ||
| ROS 2, Python | Python | Python |
| Maintained | ||
| ActiveOct 17, 2026 | DormantOct 13, 2025 | Not documented |
Upkeep is measured against each robot’s own snapshot. Costs keep the maker’s scope, so check what each figure covers.
See them in the table07 / Follow the evidence
Open books.
Repository files are pinned to commit be3ea1e. Websites and papers are listed with their review dates.
- 01README.md at be3ea1eReviewed Oct 30, 2026
- 02LICENSE at be3ea1eReviewed Oct 30, 2026
- 03hardware/README.md at be3ea1eReviewed Oct 30, 2026
- 04hardware/bom/README.md at be3ea1eReviewed Oct 30, 2026