With this drive, mandrels are mounted to a long support tube. In operation, a chain feeds around a sprocket on the mandrel to turn it. A simple pull of a lever collapses the mandrel so the part can be easily pulled off. Then, to unload the mandrel from the drive, you simply loosen the chain connected to the sprocket, and remove a nut fastened to the mandrel’s center bearing. It is then possible to slide the mandrel off the drive and load another.