Inspired by CreativeTools' Universal stand-alone filament spool holder
Made a universal roller using ball bearings before but not satisfied, so decided to stick with my scrap hard drive as a roller. After using a roll of tape to support the spool, I made this to better centralize the spool on the disc (not perfect but I'm happy with it).
I made the base and the rod so tight so I didn't need to use glue to stick them together, but because of that I pushed so hard and almost broke the base. The center-guide cone works fine on the big spool, but not the small one as shown in the picture.
Hard drive Spindle diameter : 32mm
Base to Disc hole : 32mm
Rod diameter : 15mm
Rod height : 120mm
Rod to base hole : 15mm
**If your prints are too tight to fit, file or sand down a bit before assembling.
Update: Small center guide STL added
**If your prints are too tight to fit, file a little before assembling.
After printing all parts:
- Push the base to the disc spindle
- Push the rod to the base
- Make the rod rotating perpendicular to the base disc as close as possible by rotating the disc. Adjust if needed.
Now, put a spool of filament through the rod on the base disc, then use the center-guide to move the spool.