Snap On Spool Roller

* Edit 3-3-18
I had some people mention they had trouble with non-manifold edges and intersecting triangles, so I have run the individual parts through NetFabb and uploaded the results. All parts with a -2 on the end are the repaired files.

This is a spool roller I designed after seeing a few that were fixed in place or required other means to attach them to the printer.
This will fit Cocoon / Wanhao printers with a top bar measuring 49mm top x 50mm front. It uses 608 bearings for the rolling points like many others, but the clamp part will "snap" fit onto the printer frame. The clamp width allows my filament guide to fit in between if you need one. You could also just print the side frames and sit the rollers on a bench or cabinet top.

See it in action here:
https://youtu.be/KfWX6ZouGE0

Filament guide:
https://www.thingiverse.com/thing:2810643