Machines and machine components for the conveyor technology, namely, roller elements for conveyor belts, roller conveyor belts and chain conveyor belts, deflection elements and deflection apparatus for conveyor belts and chain conveyor belts, guiding devices for rollers in roller elements, roller elements for mechanical bearings, conveying and deflection of moved or to be moved objects, helical conveyors with roller conveyor belts and/or chain conveyor belts, spiral conveyors with roller conv...