I needed a way to balance the flexible filament sample spools on my hanging spool holder rod. I found arcmatt's design, but in my case the bearings are on the ends of my spool rod, so didn't need them in the adapter pieces. I also needed a way to lock the two ends together inside the spool. So I modified the design to include threads to screw the two pieces together, and increased the center hole diameter to allow a bearing to pass through.

Parts can be printed without support or brim needed. Print slow for the threaded sections for best results.

Print instructions

Category: 3D Printer Accessories Print Settings

Printer Brand: Prusa

Printer: i3 MK2S

Rafts: No

Supports: No

Resolution: 0.2mm

Infill: 15%

Filament: Hatchbox PLA