Guide roller rotating bearing for a metal melt bath includes pivot arms and a roller bearing device arranged on each of the pivot arms. The roller bearing device includes an outer ring, cylindrical rollers and an inner ring. The outer ring includes first and second outer ring flange members. The outer ring is fixed to a pivot arm. The cylindrical rollers are configured as rolling elements. The inner ring has first and second inner ring flange members. The first and second outer ring flange members and the first and second inner ring flange members are configured to fix the cylindrical rollers in an axial direction. A shaft end includes a protective covering disposed in the roller bearing device. The protective covering includes a protective covering material that exhibits a wear-resistance which is higher than a wear resistance of the shaft end.