| | | Introduction ENDURAKOTE® plating protects bearings from corrosion and provides substantial life improvements in hostile environments. ENDURAKOTE® plating is applied over conventional bearing materials such as AISI 52100 steel, and offers the benefit of corrosion resistance normally found only in stainless steel bearings. The coating is applied to each entire bearing race ring, including the paths, thus leaving no area exposed. Other commercial chrome or cadmium coatings normally accepted and used cannot be applied to the path due to the rolling contact stresses. ENDURAKOTE® plating is hard chromium, electrodeposited by a proprietary process which achieves a true molecular bond, and will not flake or peel even under the high contact stresses experienced in the bearing paths. Laboratory and field testing results have proven the benefits of this process. Severe salt spray testing has shown that bearings with ENDURAKOTE® plating withstand corrosion as well as or better than AISI 440C stainless steel. The hard, dense exterior surface formed by the coating is extremely wear resistant and is excellent in the retention of the lubricant film. Conventional life testing of AISI 52100 steel bearings with ENDURAKOTE® plating has shown that no life derating is necessary. In fact, the extremely hard surface of ENDURAKOTE® plating protects the bearing from surface generated damage which can promote premature failure. Since the coating is capable of withstanding extremely high temperatures, the bearings are limited by the bearing materials or lubricant used. The coating used for ENDURAKOTE® plating can be applied to any type ofbearing and to most bearing materials. Its primary advantage is to utilize stock materials such as AISI 52100, etc. with their economies, and convert them to wear and corrosion resistant bearings. This is particularly beneficial for larger diameter bearings or where quick delivery is critical. Thus, cost savings can be achieved over more exotic or specialized materials. Also, stock bearings can have ENDURAKOTE® plating applied for quick delivery. The net result is that we can offer bearings with the capacity of conventional bearing steels and the corrosion resistance of AISI 440C stainless steel from standard AISI 52100 stock components. | | Application ENDURAKOTE® plating provides corrosion resistance and is effective in increasing wear resistance in sliding surface contacts such as the lands where the cage pilots. The micro-surface composition of ENDURAKOTE® plating aids in lubricant dispersion, enhancing base metals to the degree of reducing or eliminating galling, seizing, and high friction, over a wide range of installations and environments. Advantages ENDURAKOTE® plating effects a buildup ofless than .0002 under normal circumstances. Thus, it can often be applied to stock bearing components which have been specially selected. ENDURAKOTE® plating is compatible with most ferrous and nonferrous metal, allowing maximum flexibility in selection of base material. ENDURAKOTE® plating is normally a final process, and its quality is constant with any given base metal, insuring design reproducibility. Properties and Characteristics A. Hardness ENDURAKOTE® plating, as deposited, has an equivalent hardness in excess of 70 Rockwell "C." When measured by conventional micro-hardness methods, the host material will modify this measurement to some degree. B. Coefficient of Friction (Note: Measurements made at 72°F, using other materials for comparison.) | | |