Updated Spool Holders
thingiverse
These are mounts for 3/4 inch threaded rod. They work with Shaxon, Makerbot, Hatchbox, and Foxsmart brand filament spools. These don't need any bearings(I didn't want to buy them). If I get other brands of spools, I'll add them. Post-Printing Instructions Print these at whatever settings you like, then insert the correct nut for 3/4 threaded rod into each of the mounts' nut-traps. Make sure to print two, one for each side of the spool. Then screw on a nut to the left of the spool, then the mount, then the spool, then the other mount, and finally the last nut. Adjust the tension between the outside nuts so the spool can spin freely. Check the picture above to see how they work.
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