الكرة مطحنة قوة المحرك - studiokcoin. الكرة مطحنة قوة المحرك Use a Treadmill DC Drive Motor and PWM Speed Controller for , Power tools such as Metal cutting mills and lathes, Drill presses, bandsaws, , Coincidentally most Treadmills use a 80-260 VDC motor with a suitable HP , add an elbow and a length of 3"pvc and you have a machine gun for tennis balls .