Print-in-Place Roller Filament Guide for 2020 Extrusion - 2 Captive Rollers, No Bearings - STL + 3MF

Guide the filament from the spool to the extruder with two rolling wheels instead of a friction hole - and print the whole thing in one go, rollers included. No bearings, no axles, no screws except the two that hold it on the frame. **How it works** - Two 16 mm wheels turn on hubs that are locked into the base by a 45 degree diamond collar, 0.40 mm clearance - they spin but cannot come out - Facing V-grooves form a diamond-shaped channel that holds 1.75 mm filament (about 0.5 mm clearance all r…

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