• SO-101 follower arm 3D-printed parts set, all parts laid out, printed in Singapore in PLA+
  • SO-101 leader arm 3D-printed parts set, all parts laid out, printed in Singapore in PLA+
  • SO-101 follower arm printed parts, three-quarter view
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ArmDojo

SO-101 3D-Printed Parts Set, Printed in Singapore (Made to Order): Follower, Leader or Pair, PLA+ with Heat-Set Inserts

SO-101 3D-Printed Parts Set, Printed in Singapore (Made to Order): Follower, Leader or Pair, PLA+ with Heat-Set Inserts

$115.00 SGD
$115.00 SGD
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Taxes included. Shipping calculated at checkout.
Set

This is the complete set of 3D-printed structural parts for a Hugging Face LeRobot SO-101 (SO-ARM100 / SO-ARM101) robot arm — base, motor holders, under-arm and upper-arm links, wrist roll and pitch, moving jaw, handle and trigger — printed to order in Singapore in PLA+, cleaned of supports and fitted with M3 heat-set inserts, for builders who have the servos but no printer or no 17 hours of machine time to spare.

What can you use it for?

  • Building an SO-101 follower or leader arm around a 6-servo STS3215 set
  • Adding a second follower for bimanual (two-arm) LeRobot data collection
  • Replacing a cracked or worn printed link on an arm already in service
  • Classroom and workshop builds where students assemble rather than print
  • Labs that have the budget for parts but not the two days of printer time

Who is it for?

LeRobot builders, university labs and classrooms who already own or are buying Feetech STS3215 servos, and want the printed structure to arrive finished rather than tie up a printer for two days.

Compatibility

  • Arms: SO-ARM100 and SO-ARM101 (LeRobot SO-101), leader and follower — geometry unchanged from the official TheRobotStudio design
  • Servos: 6 × Feetech STS3215 per arm (12 V for the follower, the 7.4 V gear-ratio mix for the leader), with 25 T metal horns
  • Software: Hugging Face LeRobot so101_follower and so101_leader configurations work unmodified
  • Add-ons: ArmDojo SO-101 Builder's Pack supplies the adapter board, horns, cables, power and clamps

Specifications

Material PLA+ (PETG on request), 0.4 mm nozzle, 0.2 mm layers, 3 walls
Inserts M3 brass heat-set inserts fitted where the design uses machine screws
Finish Supports removed, bed surfaces de-burred, holes test-fitted
Print time About 17 h for a follower set, 18 h for a leader, 36 h for the pair
Colours White follower, black leader — other colours on request
Country of origin Singapore (printed in-house)
HS code 8487.90
Lead time 5–7 business days for one arm, 7–10 for the pair, then transit

What's in the box

  • Follower arm set: All printed parts for one SO-101 follower arm, inserts fitted, supports removed
  • Leader arm set: All printed parts for one SO-101 leader arm, including handle and trigger
  • Leader + follower pair: Both sets above, the full teleoperation pair

Shipping and returns

Printed and dispatched from Singapore with tracking. Free standard shipping on orders over $25 to Canada, the UK, EU, Japan, Korea, Australia and most other countries (5–15 days); to the United States at carrier cost from $11.99. Because every set is printed to order, allow the lead time above before dispatch. 7-day returns; a mis-printed or warped part is reprinted or refunded with shipping covered. Import duties, where charged by your country, are paid by the recipient — these parts are declared Singapore origin, HS 8487.90.

Frequently asked questions

What is not included?

Servos, horns, cables, controller board, power supply and clamps. Add the SO-ARM101 12-servo set and the SO-101 Builder's Pack from this store and you have a complete arm.

Is the geometry the official design?

Yes. These are the unmodified STL files published by TheRobotStudio for the SO-101, so LeRobot's so101 configurations and every community tutorial apply without changes.

Why does it take 5–7 days?

A follower set is about 17 hours of printer time and a leader about 18. We print on receipt of your order rather than holding finished stock, so the lead time is real production, not warehouse handling.

Why would I buy printed parts instead of printing them myself?

If you own a printer and have two days of machine time, print them — the files are free and we link them. People buy this set when the printer is busy, when they have no large-format printer, or when a lab cannot justify the labour of support removal and insert fitting.

Does Singapore origin matter?

For United States buyers it can. Duty is assessed on country of origin; these parts are printed in Singapore and declared as such, rather than being China-origin goods re-boxed. Your own customs treatment still depends on your country and the value of the shipment.

Can I get PETG or a different colour?

Yes. PETG and custom colours are available on request — email before ordering so we can confirm lead time, since colour changes affect how we batch plates.

Attribution

The part geometry is the open-source SO-ARM100 / SO-101 design by TheRobotStudio, developed with Hugging Face and released under the Apache License 2.0, printed here unmodified. ArmDojo supplies the printing, support removal and heat-set inserts; we do not claim authorship of the design and we are not affiliated with or endorsed by TheRobotStudio or Hugging Face.

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