Dommages au roulement de la brosse Powerbot

A user reported damage to the brush bearing from pet hair causing it to seize up and damage the case from friction heat in a 7000 model. He constructed a superior bearing. The 9000 series bearing appears different, never reported seizing up.
See English forum http://www.robotreviews.com/chat/viewtopic.php?f=22&t=22739&p=156168#p156168