Ower Permanent Magnet Brushless Motor Servo Electric Control Set Woodworking Machinery Lathe Drilling & Tapping Machine Energy Saving Belt Sander. Brushless servo motor control system kit. Motor pole pair number. 8 pairs of stages. Permanent magnet brushless servo energy-saving motor. Rotary knob speed control, key start and other ways to choose. Over-current, over-voltage and under-voltage, short-circuit protection, blocking protection.