SO-ARM102
The SO-101 successor: a stiffer arm pair with a parallel gripper, built for Hugging Face LeRobot
Prices and stock checked 8 Nov 2026
- Type
- Robot armRobonine
- Build difficulty
- 3 of 5Advanced
- Build time
- An evening or two for assembly (maker estimate)
- License
- Hardware CERN-OHL-P-2.0software Apache-2.0, docs CC-BY-4.0
- Lowest price in stock
- $389at Robonine
Where to buy the SO-ARM102
| Seller | Price | Stock | Checked | |
|---|---|---|---|---|
| Robonine Leader + follower, printed parts, servos, electronics, camera; unassembled | $389 | IN STOCK | checked 8 Nov 2026 | Buy |
We check each seller's own page every day. Prices are the seller's list price before shipping and tax.
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What the SO-ARM102 really costs
| Part | Cost | Source |
|---|---|---|
| Parts for two arms (leader + follower), BOM total Servos, electronics, bearings and rods, fasteners; reference prices | $342.40 | github.com checked 8 Nov 2026 |
| Same, with printing material Adds 0.4 kg PET-CF17, 0.3 kg PETG-CF, 0.5 kg PLA+ | $388.40 | github.com checked 8 Nov 2026 |
| Robonine SO-ARM102 kit Printed PET-CF parts, all 12 servos, 2 controllers, 2 power supplies, camera; unassembled | $389 | robonine.com checked 8 Nov 2026 |
BOM totals exclude shipping and taxes. The Robonine kit price excludes delivery and import duty, shown at checkout.
What it is
SO-ARM102 is Robonine's open-source successor to SO-ARM100 and SO-ARM101. You build a leader arm and a follower arm, move the leader by hand and the follower copies it. Each arm has 5 joints plus a gripper, and it works with the open-source LeRobot library.
Difficulty 3 of 5. Print or buy the parts, set servo IDs, assemble two arms with a 32-page manual, calibrate source
What it can do
- Teleoperate a follower arm with a leader arm
- Record datasets and train policies with LeRobot
- Pick up objects up to 85 mm wide with the parallel gripper
Recent news and releases
- GitHub commitroboninecom/SO-ARM102: Merge pull request #44 from roboninecom/fix/clamp-nail-rack7 Nov 2026
- GitHub commitroboninecom/SO-ARM102: updated clamp, nail, gear rack models, 3mf tables7 Nov 2026
- GitHub releasehuggingface/lerobot: Release v0.7.05 Nov 2026
- GitHub commithuggingface/lerobot: chore(dependencies): Bump lerobot to 0.7.1 (#5269)5 Nov 2026
- GitHub commithuggingface/lerobot: chore(dependencies): Bump lerobot to 0.7.0 (#5268)5 Nov 2026
- GitHub releaseroboninecom/SO-ARM102: SO-ARM 102 v0.2.0 — Hardware update and LeRobot setup22 Oct 2026
- GitHub releaseroboninecom/SO-ARM102: SO-ARM 102 v0.1.1 — BOM, sourcing and printing documentation12 Oct 2026
- GitHub releaseroboninecom/SO-ARM102: SO-ARM 102 v0.1.0 — First public release7 Oct 2026
Parts list and links
Sourced facts
4 facts with links
- SO-ARM102 vs SO-101: Parallel gripper (85 mm span), PET-CF frame, 352° base rotation vs 220°, 483 mm reach vs 441 mm, 3.4-3.9 mm deflection at 300 g vs 7.5 mm, 75 RPM shoulder and elbow servos vs 45, 60 dB vs 70 dB source · checked 8 Nov 2026
- Power: Leader runs on 5 V, follower on 12 V; the maker warns not to swap the supplies source · checked 8 Nov 2026
- Printing: Parts fit a 180 x 180 mm bed; STEP, STL and 3MF files published source · checked 8 Nov 2026
- LeRobot setup: SO-ARM102 follower plugin with the standard so101_leader type source · checked 8 Nov 2026
Get the SO-ARM102 when it is in stock and cheaper
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