Prusa CORE One Bearing Spool Holder with adjustable break

Inspired by @RJ019_231723 "Prusa CORE One Bearing Spool Holder"

My optimal spool holder, should work with pretty much any spool with an inner diameter of at least 42mm and a max with of ca. 75mm (depends on overall geometry).

Main features are the bearings that make it rotate very easily which is perfect for TPU. This however makes printing stiffer materials almost impossible, because they unwind and skip from the spool. Therefore I added an adjustable break lets you rises the friction and therefore the force required to rotate the spool holder by turning the break wheel next to the base of the holder.

Needed Hardware: 2x 608 bearings 1x M8 bolt (recommended: 85mm length, at least 80mm) 2x M8 nuts (optional 3rd to counter) thread lock/ glue recommended

Assembly: 1. Insert the M8 bolt into "Core One Bearing Spool Holder Base" and lock it in place with a nut 2. add a "spacer" after the nut 3. insert the bearings into the "Core One Bearing Spool Holder Centre" from top and bottom 4. insert the "break" into the "Core One Bearing Spool Holder Centre". The prongs should go into the holes in the Base. 5. slide the bolt of the Base trough the bearings of the Centre 6. add a "spacer" to the end of the bolt 7. lock everything together with 1 or preferably 2 nuts. Don't tighten the first nut too hard. Maker sure that the Centre can freely rotate but doesn't have too much play. Use thread locker. 8. put the Core One Bearing Spool Holder Cap" in place to cover the screw 9. screw the "Break_Wheel" onto the finer threads next to the base 10. screw the "Core One Bearing Spool Holder" onto the large threads. 11. Mount the spool holder onto your printer - have fun!

The Spool Holder is 92mm long and will work together with this dry box mod:

Also check out my mod for it: