I spend a lot of time on these designs so TIPS are greatly appreciated.
Designed to fit into the Spannerhands https://www.thingiverse.com/thing:2119644 spool holder for easy/fast change outs and inspired by https://www.thingiverse.com/thing:1241566. This is by far my favorite spool holder so I had to add an adjustable spool axle. Due to the cone shape this spool holder will fit multiple size spools up to 1kg. The cones go from 48mm to 58mm. Due to the large coarse threads and clearance you can change the spool really quickly. Everything is captive except for the large nut. Just lift the entire assembly out and remove the nut (it will slide out over the end bushings/cap) and change out the filament. It has two 608 bearings which can be pre-loaded with the two nuts(hidden) if you want a little resistance. Some odd shaped spools may not fit, all of the ones I have do. Unit will work without the bearings but will not be as smooth.
1 Threaded Rod 98mm long x 8mm (or 5/16") diameter
2 Threaded rod nuts (8mm or 5/16")
2 608 Bearings
- Print 1 large spool
- Print 1 large spool nut
- Print 2 of either the 8mm end cap bushings or the 5/16" depending on your rod size.
- End cap bushings are all ready threaded (extra tolerance, no tools needed). One side only has a bevel to aid in threading the rod into it (super easy).
- Tighten the nuts for desired amount of spool resistance if needed.
- Center of spool is hollow between bearing races with overhang under top bearing to save material.
- Large spool/nut have been designed witch extra clearance so they thread on and off really easy. When tightened against spool they are very secure.
- See print notes below for best results.
TIP - if you preload the bearings a lot and the entire assembly rotates in the spool holder just un-thread the two end caps a little so they are tight (side ways) in the box and they will stay in place. You won't even have to adjust it every time.
- Large Spool and Nut - Printed at .3 with 5 outside layers(threads come out better). Used 35% infill
- Printed without any supports, depending on your printer you man need supports on the large spool/bolt ONLY from the build surface underneath the bottom bearing support.
- End Cap Bushings - Printed at .2 to make sure the threads come out nice. 50% infill.