Original Prusa i3 Mk2 spool holder
thingiverse
A minimalist spool holder. Two 608 ball bearings, one length of 8mm threaded rod, four bolts, two washers, and a single piece of 5cm PVC pipe are all that's required to assemble this simple device. Insert the ball bearings into two pre-printed parts, then bond them together with adhesive within the confines of the PVC tube. The result is a spool holder with a diameter identical to Joseph Prusa's rolls. To accommodate larger spools, modifications will be necessary. Recently, two additional feet were added for enclosure support: https://www.thingiverse.com/thing:2513203
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