Automotive motors and stators are made from magnet wire which is a copper wire or bar coated with polyimide. Traditional means of removing the enamel insulation from such wires or bars include; induction heating and brushing, abrasive wheels, and mechanical blades. These methods require significant maintenance with regular replacement of broken parts or blunt blades. The underlying conductors are also more likely to be damaged by nicks and scrapes from the use of such tools. 

The advent of electric vehicles and general requirements for more efficient automotive motors is driving a huge increase in the use of hairpin designs which in turn requires a significant increase in enamel removal to be undertaken.