I have a juicer and a drill machine and both show same symptoms. Both get excessive hot and a burning smell is emitted when used for sometime. Also they lose power when this happens. Juicer auto shuts when this happens and then becomes operative after 10-20 minutes while drill, having no protection mechanism, keeps emitting smoke with burning smell and I have to stop it.
I suspect it is the rotor which is causing this. bushes seem fine and also shopkeeper suggest they are fine. They advise to change whole motor for juicer while for drill they advise to buy new instead of trying to repair.
I am looking for my options. is there a way I can only get a rotor from somewhere and replace it instead of replacing whole motor? I love to do it DIY.