A roller refers to a wheel or a revolving cylinder over or on which something is moved or which is used to press, shape, spread, or smooth something in a rolling motion. Machines employing conveyor systems often utilize rollers as do drawers, cabinets, and sliding doors. A shaft is a rotating machine element, usually circular in cross section, which is used to transmit power from one part to another, or from a machine which produces power to a machine which absorbs power. The various members such as pulleys and gears are mounted on it. Features. Shaft Club Drive Roller, Long. Made with high quality material