Ampflow a28 400 f 77mm 3in diameter high performance motors and gearboxes ampflow a28 400 f24 g the a28 400 f24 g uses the high performance 43hp a28 400 f24 motor and is also fitted with a 831 reduction chain drive gearbox these strong gearboxes give a huge amount of torque which is ideal for heavy duty robotics motorised vehicles and automation applicationsthe motor itself uses rare earth neodymium magnets and with a nominal voltage of 24v produces a peak power of 43hp they are fi