NSK-RHP has developed ceramic coated outer rings for its single row deep groove ball bearings and cylindrical roller bearings that are used in traction motors. The rings, when assembled as part of the bearings, safeguard them from the damaging effects of electrical corrosion.
The outside diameter and faces of the bearing outer ring are coated with ceramic using a plasma spraying method. To enhance the adhesion of the ceramic to the bearing steel, a thin metallic melt – or bond coat – is first applied to the bearing outer ring. The high quality coating is able to withstand press fitting forces without damage.
NSK-RHP Tel: 0115 936 6600