3D-Printed Revolute Joints with Real Ball Bearings and Threaded Inserts скачать в хорошем качестве

3D-Printed Revolute Joints with Real Ball Bearings and Threaded Inserts

In this video, I’m revisiting my earlier 3D-printed crank-slider linkage project — but this time, the goal was to make everything smaller, smoother, and more precise. I redesigned the mechanism to include real ball bearings (623 type) in the revolute joints, which makes a huge difference in how cleanly the parts move. I’ll walk you through how I designed the bearing mounts, added small features to reduce friction between links, and experimented with threaded inserts for the slider component. The mechanism is driven by a Feetech STS3215 bus servo, which I connected through a Waveshare Serial Bus Servo Driver Board and controlled directly from my Mac using Python. These servos are the same family used in the open-source LeRobot arm from Hugging Face — and they’re great for prototyping robotic mechanisms. If you enjoy 3D printing, CAD design, or mechanical prototyping, this one’s for you! 🧩 *Main topics:* Using 623 ball bearings in small mechanisms Designing precise revolute joints in Onshape Threaded inserts for clean connections Bus servo control via Python 🛠️ *Tools & components:* Feetech STS3215 servo Waveshare Serial Bus Servo Driver Board Onshape CAD 623 ball bearings If you liked this build, consider subscribing — more mechanical and robotics projects coming soon!