Ender 3 Filament roller guide top and bottom

thingiverse

Edit 23/4/2020: I have redesigned the dovetail to have a better fit and it has a hole which allows the stock M5x45 bolt used to support the Ender 3's top rail to secure it in place. due to a different size I also redesigned the support arm, however the old one will still fit, it just wont be flush. The photo shows the old flat arm, I haven't had the chance yet to print one. I modified the Filament roller guide by Holspeed to use a M4 bolt thread and made a matching top guide In a similar style. The top filament guide connects to the Ender 3's aluminium frame in 2 parts, a small dovetail connection and a filament guide which comes either flat or angled up 30 degrees. The -Flat- arm is good if your spool is mounted to the left of the ender 3's top frame The -Angled- arm is good if the spool is closer to the right, or if you are supporting your spool in a horizontal manner, check out my Horizontal Spool holder if you're interested: https://www.thingiverse.com/thing:4314752 Each support will need 2 of the 4mm bearing inner race guides, I have included 3 bearing outer races with different diameters (22.0mm, 22.2mm and 22.4mm) just match which fits best onto your bearings, which should be 608 skateboard bearings. You will also need 1 M4x20mm bolt and nut for each guide used. I included the SketchUp file as well if you want to further modify it. I used 7% supports while printing, see the final photo for how I orientated the parts for printing.