The machine is designed to handle brake discs within the brake disc processing line. The roller unit consists of two sets of width-adjustable idle rollers positioned on an inclined plane to allow the workpieces to slide under the force of gravity. The machine is equipped with an arm sequencer, controlled by two pneumatic cylinders working in synchronisation. The arms move sequentially, opening the forward passage and closing the back one so that only one piece can pass at a time.