Simple Ball Bearing Filament Rotator

Using just 9.5mm ball bearings, you can create a simple rotating 'bearing' that will let your large filament rolls rotate.

I have a Fisher Delta and I can only hang 0.5kg spools on the side, so I have to lay my 1kg spools down so I designed this to rotate.

Edited to create the correct contact pad - very top and bottom of the ball bearings. Object is 100mm wide and will take 29 x 9.5mm ball bearings with a 2mm gap. I may edit this object to remove the 2mm gap later, but it works just fine