I wanted a spool holder I could mount at the top of my printer enclosure which both locks tight and is easy to change.

What you need:

• 2 ball bearings 6 x 17 x 6
• M6 threaded rod ~30 cm
• plain M6 nuts + washers

assembly:

1. print 2 cones and press fit a ball bearing into each
2. print the wheel and insert a M6 nut into the shaft (screw it to the threaded rod and use that as guide)
3. print the lever and insert a M6 nut
4. print the pair of clips
5. screw the wheel and the lever onto the threaded rod so the latter goes into the wheel shaft
6. super glue the clip into the end of the wheel shaft so the lever cannot get out

Whenever you turn the lever clockwise, it'll screw its nut against the wheel shaft nut, turning them into a double lock nut.

Creality

CR-10S