Adjustable Filament Spool Roller

prusaprinters

This is an adjustable spool roller that sits next to the 3D printer and feeds filament while rolling smoothly. The required additional hardware is 4x 608 bearings and 4 hex cap-head bolts of size M3x8, M3x10, or M3x12 (use whatever length bolts you have).Print 2 of the “front” pieces, 2 of the "rear" pieces, and 2 "rails."Assembly is fairly simple. Install 2 bearings into each "front" piece, place the "back" piece, and bolt into place. The rails are generously chamfered on one side to make assembly easier. Slide both roller assemblies onto the rails. For ease of use, glue the rails to one of the roller assemblies and let the other assembly slide freely.