My mixer is working fine but makes a very loud screeching noise so i am afraid to use it.

Hi..mixer has motor on it.It is responsible of rotating the pan.but yuo said it does worked however yuo can just hear a noise..If yuo can remove the motor on it.check if the small shafting runs smoothly .its just some debris has have blocked the shafting that makes any sound.Or the motor itself does not have any lubrication to run it smoothly..the ROTOR that is the inner part of the motor that rotates might as well does not have anymore lubrication .its bearing .So it would be better to check it further..Hope this idea helps.