Roomba 800 series roller bushing ball bearing upgrade

thingiverse

This is an upgrade to the Roomba 800 series roller bar bushings on the stock units. My dogs have very fine hair that was getting in between the bronze bushing and steel shaft, overheating, then melting the bushing holder plastic and causing a general mess. This design replaces the bronze bushing with a proper shielded ball bearing, size F623ZZ. These shielded bearings should keep more contaminants out and last longer than the stock bushings that the Roomba ships with. Print this oriented so the two tabs face down against the bed and turn on supports. This is to ensure that the two small locking tabs print correctly. There are some small features on this part, I would recommend printing at or below .16mm layer height. The F623ZZ should fit snugly into place without any issues, but I still recommend securing it inside the part with a drop of superglue for extra peace of mind.