Formada3D SO-101 robot arm printed part sets (follower, leader, pair) for the LeRobot open-source arm
The SO-101 is the open-source 6-axis arm that Hugging Face LeRobot uses for imitation learning: a follower arm the robot moves and a leader arm a person holds to teach it. We print the complete structural set from the official Apache-2.0 release in our Melbourne workshop and ship in 3 to 5 business days, so a lab or classroom can go from order to a working arm in about a week with a standard STS3215 servo kit from a Seeed Studio or Waveshare reseller. The WaveShare driver-board mounting plate is standard; ask for the Seeed Studio XIAO plate if your kit uses that board. Printed parts only: no servos, boards, cables, power supplies or screws.
From A$44.95 for the follower or leader set in PLA Matte. Printed to order in Melbourne and shipped Australia-wide; we confirm the final price and lead time before anything is printed.
On the quote page choose Request a quote (no file needed) and name this part and the option you want.
Standard pieces and colours are also sold at a fixed price in the shop. This page is for other sizes, materials, custom text and bulk quotes.
Order status. Prices are per set; standard shipping is A$10 Australia-wide on formada3d.com retail orders (free over A$100) and quoted on business invoices. Servo kits are not included; we can point you to the standard 12-servo kit from local resellers. Pictures are renders from the official files until the photos of our first test prints land.
What does it look like in use?
Renders are computer images of our own design, made from the same model we print. This family is made to order: real photos of our first prints are coming.
Specifications: material, size and what it fits
| Spec | Detail |
|---|---|
| Material | PLA Matte (nine colours, Matte Black standard), 0.6 mm nozzle at 0.3 mm layers, 15 % infill with tree supports as the project recommends. PETG-CF (carbon-fibre filled, stiffer) quoted on request |
| Sets | Follower: 11 parts, about 540 g. Leader: 12 parts including handle and trigger, about 560 g. Pair: 23 parts. Each set includes one driver-board mounting plate (WaveShare standard, Seeed XIAO on request) |
| Source files | Official SO-101 STL release, The Robot Studio (github.com/TheRobotStudio/SO-ARM100), Apache License 2.0, printed unmodified; the upstream commit is stated on the packing slip |
| Fits | The SO-101 / SO-ARM101 layout with 6 x Feetech STS3215 bus servos per arm and the standard Seeed Studio, Waveshare or Feetech servo kits. Not the older SO-100 wrist |
| Hardware | Not included: servos, driver boards, power supplies, cables, screws (the arm uses the M2 / M3 screws supplied with the servos) and the two small off-the-shelf desk clamps the assembly guide uses |
| Printing | Parts printed in the upstream orientation on a Bambu Lab printer, about 12 hours per arm; supports removed, horizontal screw holes cleared and servo pockets checked against the upstream STS3215 gauges before packing |
| Size | Assembled reach about 400 mm; largest printed part 142 x 25 x 67 mm (upper arm) |
SO-101 / SO-ARM100 are open-source designs by The Robot Studio, released under the Apache License 2.0 (github.com/TheRobotStudio/SO-ARM100); we print the published files unmodified. Hugging Face, LeRobot, Seeed Studio, Waveshare and Feetech are trademarks of their owners, named to describe compatibility only; Formada3D is independent and not affiliated with or endorsed by any of them.
How much does it cost?
Guide prices for printed parts, in Australian dollars. Shipping is extra; we confirm the final price, including any business minimum, before printing. Bulk and custom sizes are quoted per job.
| Option | From |
|---|---|
| Follower set, PLA Matte (11 parts) | A$44.95 |
| Leader set, PLA Matte (12 parts) | A$44.95 |
| Pair, follower + leader, PLA Matte (23 parts) | A$79.95 |
| 5+ pairs | -5 % |
| 10+ pairs (class sets) | -10 %, invoice and purchase order accepted |
| PETG-CF (carbon-fibre filled) | Quoted on request |
| Spare single part (jaw, gripper, handle...) | from A$8 |
Who it's for
University robotics labs, TAFE and school STEM programs, LeRobot researchers and integrators who want the arm's structure sourced locally with a fixed lead time instead of a 2 to 4 week import.
Safety & use
Installation & use. Designed for the uses described on this page only. Fixings are not included: use the sizes listed, check they are tight before use, and check the parts regularly for wear or damage. Not for safety-critical or overhead load-bearing use. Damage caused by misuse, modification or overloading isn't a fault in the product.
Moving machinery. A powered arm can pinch and can move unexpectedly during calibration. Keep hands, hair and cables clear, power it from the supply the servo maker specifies, and never leave it running unattended. Not for safety-critical or load-bearing use.
Printed parts only. No electrical function; wiring, servo limits and calibration are the builder's responsibility under the LeRobot documentation. PLA softens above about 55 degrees C: keep the arm away from heaters and direct sun.
This doesn't affect your rights under the Australian Consumer Law.
Common questions
Do you supply the servos or a complete kit?
No. We print and supply the structural parts. The standard 12-servo motor kit (without printed parts) is sold by Seeed Studio resellers in Australia; we can quote an assembled arm on request if you supply the kit.
Which revision do you print?
The current official SO-101 STL release. The upstream commit is on the packing slip, and we say on this page when we move to a newer one.
Can you print a class set?
Yes. 5+ pairs -5 %, 10+ pairs -10 %, with an invoice and purchase order. Lead time for ten pairs is about one week.
PETG-CF or PLA?
PLA Matte is what the project recommends and is fine for a desk arm. PETG-CF is stiffer and more stable for arms that run all day or get handled by many students; it is quoted on request because the filament costs more.
Do you assemble arms?
Quote on request: send us the servo kit or have it delivered here and we assemble and calibrate. Assembly labour is quoted per arm.
How do I order?
Single sets at the fixed price: buy in our shop. Class sets, PETG-CF or an invoice: use Get a quote and choose Request a quote, naming the set (follower, leader, pair), quantity, colour and mounting plate. We confirm price and lead time before printing.
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Sensor brackets, suction-cup arms and ISO 9409-1 tool-flange adapters for 2020 extrusion
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Last updated 11 October 2026.