Spool Helper
thingiverse
To rotate the spool on the rod, simply insert a bearing into the central hole. Ensure it's fully seated and you may need to sand the inside for a proper fit. The provided .scad file accommodates varying coil sizes; mine measures 32mm.
Download Model from thingiverse
With this file you will be able to print Spool Helper 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 Spool Helper.