Compact Spool Holder
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A compact spoolholder with very smooth unwinding. The mechanics are hidden inside the rod.
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Model information
- Source
- Printables
- Category
- Accessories
- License
- Creative Commons — Attribution — Noncommercial
This is a very compact spoolholder I designed to fit my Prusa Mini enclosure. The existing ones did not really suit my needs - they were too deep and there was not enough space to the Z-axis. Also the friction is too high, it needed smooth unwinding.
Thus I came up with this design, where the mechanics are hidden inside the rod itself. It is, besides the bearings, fully printable!
Please use the 3MF files to check the modifiers for “bracket”, “axis” and “spacer” (3 perimeters, 40% infill). All parts are named.
You also need two 608 bearings, printed ones should also work.
Assembly (refer to photos):
- take the bracket and assemble the axis in it - there is only 0.1mm gap - so it requires some force or sanding - make sure the axis is flush with the backside and that you cannot pull it out - you can use some glue if it is loose
- assemble the 608 bearing in the cap and in the body. Also here there is only 0.1mm gap - so your printer needs to be well tuned and the bearings need some mild force to go in. On the body a strong chopstick helps - or you need long fingers.
- assemble the bracket with screws (and optional spacer) to your wooden panel / enclosure. It is designed for 3mm wood screws. Make sure the screws are vertical, this is best for force on the axis
- slide on the body assembly with the bearing side first onto the axis - it is also press fit here axis / bearing
- optional: slide on some of the locking nuts and push them all the way down with a small screwdriver - do not use glue! You will not get the spool holder disassembled! If the nuts move too easily, you can scale them down a bit in PS.
- slide on the cap with the bearing side - again press fit on bearing / axis and cap / body
Done!
Note: you should not “pull outwards" on the spool with the filament, make sure you pull vertical or towards the bracket so the spool does not pull off the body - this never happened to me, but there is a small risk, when you do not use the press-fit locking nuts.
Tested on 1kg spools only… Use PETG as a minimum for the axis, better for all parts.