They absolutely are, especially as the motors get bigger. See for yourself at k&j magnetics: https://www.kjmagnetics.com/?gclid=Cj0KCQjwmICoBhDxARIsABXkXlILq8

They absolutely are, especially as the motors get bigger. See for yourself at k&j magnetics: https://www.kjmagnetics.com/?gclid=Cj0KCQjwmICoBhDxARIsABXkXlILq8MC5a5RR20bfP1afy1hQMQ_CRrdEa16nr6TNDLbujnwjEHBGEgaAuy0EALw_wcB https://www.kjmagnetics.com/?gclid=Cj0KCQjwmICoBhDxARIsABXkX... Small ones are a few dollars, bigger ones are hundreds or thousands