3D Solutech Bearings for Ender 3
Description
I use 3D Solutech filament and didn't like how the filament spool dragged on the Ender 3's spool rod (even with the filament guide). So, I built some bearings and a sleeve to allow the spool to freely spin. They spin actually quite well. It requires qty 22 Airsoft BBs (6mm diameter) per bearing. When the z layer reaches 8.0mm, pause the print, insert the BBs, then resume the print. Any higher than 8.0 and the balls won't freely fall into place. You will need to watch the printer after inserting the balls just in case the extruder nozzle travels over one and pops out a BB. The first bearing I printed had no issues at all. The second one had the nozzle pop out a BB, so I paused the print again, put the BB back in and resumed with no further issues. I printed with no supports, thus there was a little clean up with the overhang over the balls. I just took a hobby knife and cut out the overhangs. ===================== ** Update ** I added an updated wall stl file: "Wall Only v2.stl" This wall has a lip so that the spool can't slide off the cylinder. I also recommend to add spot "welds" of hot glue to keep the bearings attached to the wall. I added another photo showing this. Found that after 2hours into a print one of the bearings walked inward about 1 mm. Not much, but if is a really long print, it might walk a lot further and make the spool tilt.
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