1. Motor rotor stamping die 2. Silicon steel sheet 3. Progressive stamping die 4. Different sizes 5. 10 years experience Motor rotor stamping die 1. Die cutting edge material is tungsten steel. 2. Life time for die should not be less than 100000000 shots.3. Wind power generators, solar motors, electric motors, shaded pole motors, series/clutch motors, sewing machine motors, DC motors, brushless ...