Prusa MK3 Filament Guide

thingiverse

I'm planning to stick with this for now, but I might make some tweaks later on. To be honest, I wasn't thrilled with the filament guides I found online, so I decided to base my own design loosely off of JLTX's filament mount, which you can find at https://www.thingiverse.com/thing:2727093. I really liked having a bearing in the guide. There were a couple of things that didn't sit well with me about the original design, though. First, it fit too loosely in my Z brackets. Second, I could only feed filament from the side of the printer for this to work, but I wanted to be able to feed filament from behind the printer or from the spool holder. This new design should work both ways, but if you're using a spool holder, the filament would have to feed from the bottom of the spool. I'm not sure how well that will hold up in the long run. I used 608ZZ bearings in my design. Update: On July 8, 2018, I beefed up the guide a bit and added a little lip at the bottom to help lock it onto the frame. I also included step files for anyone who wants to improve the design.