Micro ball bearings & shafts : setup for tight fitting using a drill press

thingiverse

In this video, I demonstrate how I set up a precise fit between a metal shaft and a micro ball bearing using a drill press. The bearings featured in this project are 3x10x4mm and 3x8x4mm. Initially, I attempted to use a 2.9mm shaft but found it too loose within the bearings, resulting in excessive vibration for drones. My challenge with 3mm shafts lies in their slightly larger diameter compared to the bearing's inner diameter. To address this issue, I designed and created a custom setup combining 3D printing and metal components: a steel plate and a 10mm stand-off screw spacer. With a drill press, I carefully push (force) the shaft through the bearing without causing damage or compromising its free rotation functionality. This setup represents my general approach to fitting shafts into bearings. If you require custom designs for different bearing sizes and spacer types, simply leave a comment with the desired dimensions, and I'll be happy to create a 3D design tailored to your needs. For detailed instructions, please refer to the accompanying video: https://youtu.be/ti5zOlTWRjA