61mm Filament Spool Adapter and Hub

thingiverse

I did not appreciate the behavior of the spools, as the large hole inside hindered smooth unrolling of the filament. The adapters supplied here failed to meet my requirements, prompting me to design a very simple one on my own. Printing at 20% infill with no support or rafts proved sufficient and allowed them to print in about an hour per part on my Tronxy X5s. The adapter is not press-fit, as I realized that the spool's inner diameter varies from side to side. However, I added a chamfer to enable it to center itself on the spool. I opted against using bearings, believing they are unnecessary. The holes provide sufficient clearance for free rotation and minimal friction exists. The M8 axis' play has no adverse effects while moving the coil. Update: I increased the chamfer that centered the hub on the spool a bit. Feel free to try it out.