Replacement for Bambu Lab A1 spool holder, almost without friction. It was designed to help while printing flexible filament.
It uses two 626ZZ ball bearings and a 6mm aluminium rod.
There are two versions. The second versions adds a clip below each arm. Both are provided in STL format (all parts in one file). I also provide a STEP file containing all the elements including rod, bearings.
Moreover, the original design can be found as open source in Onshape public domain: https://cad.onshape.com/documents/696ff2937c7c662c0e110f65/w/6ab3c934a2f19b0912c92028/e/fd7af332c6cb27f3c67abfeb
--> Just right-click on a part to export into your preferred file format.

A French description of this thing is available on https://wiki.logre.eu/index.php/Bambu-A1_support_de_bobine. (LOG means "Laboratoire Ouvert Grenoblois", and LOG is a French hackerspace in Grenoble-France)