Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4918315.

This is a remix of two objects to make a ball bearing Polymaker spool hub. The thing files are: https://www.thingiverse.com/thing:3604939 & https://www.thingiverse.com/thing:3652656

The SCAD ball bearing file was the 5-ball design that I made in a loose and tight fit, the spool hub was the six spoke design with a smaller inner diameter. I combined the two with Tinkercad to make the final object.

The new spool holder fits very well and runs extremely smooth.