Motor plate

This part is produced using a progressive die, formed into a circular plate with multiple sawtooth-shaped right-angle bent tabs around its circumference, requiring each station to form several bend points simultaneously and precisely without deforming the central ring. The Ø3.2 holes must be accurately tapped with M4 threads in a separate step, and the burring holes require a thread depth of more than 2.5 times the plate thickness, so the tapping step must be tightly controlled to avoid stripped threads or insufficient depth. Since this part mounts directly to the motor, the overall roundness and concentricity also directly affect vibration and noise during motor operation.