Adjustable filament spool holder

A spool holder designed for low friction which can accommodate different inner diameters and spool widths. Two ball bearings provide low friction for the extruder and the cones are locked onto the shaft with a small screw. It can hold spools with a hole diameter of 40 to 70 mm and a diameter of up to approximately 100 mm. Multiple shafts and cones may be printed for quick swapping of filament spools. The maximum spool diameter is 200 mm. It requires 2 608 ZZ ball bearings, 2 M3 threaded inserts and 2 M3x12 (or longer) screws. For optimal quality, use the step (.stp) files. Print 1 stand, 2 cones and 1 shaft. To assemble, just put on the bearings and insert the threaded inserts. Two sizes of cones are available, depending on the inner diameter of your spools.