Abstract: In a revolution transport system for manufacturing and assembly lines with work stations arranged along the transport system, workpiece carriers are movably supported on a track formed by horizontally spaced outer and inner carrier and support rails extending around the transport system wherein each workpiece carrier includes a carriage movably supported on the outer rail and upper and lower rollers in engagement with upwardly facing and downwardly fairing surfaces of the intermediate or inner rail to prevent tilting of the workpiece carrier by forces acting on an outwardly projecting workpiece support arm of the workpiece carrier.