You've just discovered that Electric motors use brushes on their commutators? Welcome to the 20th century. Brushes are intended to be replaced, and many manufa

You've just discovered that Electric motors use brushes on their commutators? Welcome to the 20th century. Brushes are intended to be replaced, and many manufacturers supply spare brushes in the original packaging. In the 21st century however the traditional brushes have been replaced by electronic switching. see https://en.wikipedia.org/wiki/Brushless_DC_electric_motor https://en.wikipedia.org/wiki/Brushless_DC_electric_motor