NoWear coating is a wear-resistant carbon coating. NoWear coating can be applied to the rolling elements and inner ring raceway of bearings (designation suffix L7DA) or only to the rolling elements (designation suffix L5DA).
NoWear coating applies a wear-resistant carbon coating to the bearing surface using a physical vapor deposition (PVD) process. The coating thickness ranges from 1 to 3 μm, depending on the bearing size. The coating has a hardness of 1,200 HV10.
The coating of NoWear bearings increases the surface hardness, friction and wear resistance while retaining the toughness of the base material.
A small amount of coating material is transferred to the mating surfaces during the running-in period. Even if only the rolling elements of the bearing are coated, the coating can reduce friction and improve resistance to wear and adhesive wear.