Axles for 608 bearing
thingiverse
I slightly widened the axles and added a stub to accept a 608 bearing, so I could run the below wheels on the trailer. Fasten with an M4 screw and washer. I also included a file to print spacers for the bearings as needed. The axle stub is a tiny bit longer than needed. https://www.thingiverse.com/thing:3774018
Download Model from thingiverse
With this file you will be able to print Axles for 608 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 Axles for 608 bearing.