The video below shows a drill that has a long center shaft which feeds in one operation and spins in another. The big difference with this drill compared to others is the shaft is not connected in line with the motor. The purpose of this seems so that the shaft can slide in and out and the motor can stay in on location. Can some one explain to me how they think this would work? It looks like the spinning of the drill is one operation controlled by the pulley and belt clearly seen and the forward backward motion is another operation that is controlled by some type of clutch mechanism?