A method of producing a bearing component such as an inner ring, an outer ring and rolling elements having a solid lubricant on a frictional surface part thereof, which comprises a step of forming a coating of a material on a frictional surface part of a metal substrate, the solubilities of the coating...http://www.google.com/patents/US4508396?utm_source=gb-gplus-sharePatent US4508396 - Method of producing bearing component
