stand alone spool holder
thingiverse
I desperately sought out a sturdy spool holder with low friction that matched this exact style, but to no avail, and I had a broken ABS spool where the flange size kept fluctuating so badly that it put excessive stress on my extruder. The low-profile design necessitated the use of a spool centering device, which I utilized: https://www.thingiverse.com/thing:2422558. Since I didn't have threaded rod readily available, I opted for an alternative hardware solution found here: https://www.thingiverse.com/thing:193647.
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