A re-written version of the feet that ship with the MakerGear Mosaic and the spool holder feet to match to make one version of the many four bearing spool holders around Cults.
Designed using M6 rod and 626 ball bearings although the source file could be easily changed for M8 rod and 608 bearings.
To build the spool holder, you will need the following:
2x 150mm M6 threaded rod
2x 125mm M6 threaded rod
4x 626ZZ ball bearing
16x M6 nut
20x M6 internal tooth lock washer
Assemble as shown, making sure to place a lock washer in between the inside of the foot and the bearing. Inside dimensions are approximately 76mm x 100mm between feet although this is not mission critical. I find it works especially well with 1.75mm filament to feed the filament from the bottom to stop filament unraveling.