Ender 3 roller bearing filament guide

thingiverse

When I first got my Ender 3 PRO I printed the most popular filament guide, for it being easy to print and a good looking design. Well, turns out a LOT of drag is generated at the interface between the filament and the guiding loop, to the point my extruder was struggling a bit and getting hot. So, instead of wasting filament and printitng a new support featuring a roller bearing, I designed this addition which basically eliminates friction. The original files are included, many thanks to the original designer. Assembly requires superglue, just align it as best as you can by eye as shown in the picture, it's not critical at all. Fitting tollerances were already taken into account during modeling so no slicer settings need attention in that regard. All should come out as snug fits. If you're struggling with snug or loose fits do not reprint, the shaft is made separate to be easy to sand and if the fit is too lose a piece of electrical tape (stretched if necessary) will do the trick. Supports are theoretically not required, but the bore for the shaft may benefit from some support, print in the shown orientation. I printed in PLA+. The slots were designed to save filament and pour glue for better adehesion. Hardware required: -608 bearing (obtainable from a roller skate wheel). -Superglue, cyanacrilate (yes, it will hold).