Wanhao i3 filament guide

Simple spool holder that uses any skate bearing to provide zero drag on the filament. Requires 1 skate bearing ( typical 8mm ID ) and a 8mm or longer m3 bolt.

Print 2 washers and sandwich them between the bearing. Slide the 3d printed bolt through the washers and bearing and press it tight against the filament guide main part. Screw in m3 bolt through the main part to secure the filament bolt in place. Slide on the filament guide pulley and your good to go. I did print the Filament Guide Pulley with supports standing not on its side. Enjoy!