Linear Bearing
thingiverse
Here's a rewritten version of the text: Updated Version: Larger curves cause the balls to get stuck every time, regardless of print quality. Use 6mm BBs as bearings for smooth motion. These can help move heavy loads or make large objects more mobile.
Download Model from thingiverse
With this file you will be able to print Linear Bearing with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Linear Bearing.