LM8UU Bearing. Fits 8mm rods. Works with all axes. Eliminates wobble. Reduces vibrations. Silient.
Tested over summer / hundreds of print hours on Y-axis with heated bed. Very reliable. Approved for temperatures up to 110C. Possibly higher if necessary..
Print with ABS, PETG, or similiar material to prevent deformation. Do not use brim or supports. Orientate bearing vertically.
Clean components with isopropyl alcohol. Remember to regrease in order to reduce friction.