Soft Robotics Crawler Prototype Fabrication

I’m building a bionic crawler and need a skilled fabricator to take my CAD files and turn them into a fully assembled mechanical chassis ready to crawl out of the box.

Core focus
Your strongest skill should be 3D printing: the flex-legs must be printed in 95 A TPU with specific dimensions, certain joint types, and a custom internal channel design for Kevlar tendons. Clean surface finish and dimensional accuracy are critical so the legs articulate freely once the tendons are pulled.

Task flow
• Print 8–10 articulated flex-legs in TPU, either print-in-place or as modular joints—whichever yields the smoothest motion.
• Cast a two-part Dragon Skin 30 silicone over-mold (pigmented Army Green, Bark Brown, or Pearl; I’ll choose before you pour) to create a soft belly that can house four N20 micro worm-gear motors and the core PCB.
• Thread 100 lb Kevlar tendons through the built-in channels and secure them to the motors to achieve a basic crawl cycle. Basic motor wiring and quick bench test are enough; no control electronics needed at this stage.
• Package the completed chassis carefully and express-ship it to my address.

Acceptance criteria
1. Legs articulate smoothly by hand after tendon installation.
2. Belly over-mold bonds cleanly to the printed frame without air pockets.
3. Motors mounted, tendons tensioned, and a short video shows a powered crawl or at least visible limb actuation.
4. Chassis arrives undamaged.

If you regularly work with flexible filaments, silicone casting, and small DC gearmotors, this should be a straightforward rapid prototype. I can supply STEP files, motor specs, and tendon routing diagrams the moment we start. Looking forward to seeing this crawler come to life in your workshop!