Adjustable filament guide with bearing for Ender 3.
You will need a bearing, I've used a 608 bearing which is cheap and easy to find. Also you may need a M8x25 mm bolt and M8 nut to put all the parts together or you can print them**, as you can see in the pictures I used a stainless steel bolt and printed the nut, it's up to you.
-Mount the base using the same bolts from the Z axis nut.
-Put the M8x25 bolt and the spacer ring as seen in the picture.
-Mount the bearing and the cap ring. Keep in mind that upper side of the cap ring needs to be facing the bearing in order to let it spin.
-Put and tighten the M8 nut, make sure the bearing spins freely.
** There was an error in the first bolt metric, now it's fixed. Also the nut has been updated.