The major features of the wire raceway ball bearing The major characterization of PRS products: The wire raceway ball bearings can sustain forces from whatever directions due to their 3-point or 4-point geometry .The rings have the advantage that they fit themselves tightly into the bearing rings of the mating structure and compensate machining tolerances. With this technology high precision even if large bearing diameter is achieved. They are convenient and economical to use .The new process aimed at tightly matching between steel ball and race ways .Thus the load ,the capacity ,and precision of the bearing elements are increased and they are better adapted to particular demands . There are four types of the wire raceway ball bearing .For example ,4-point contact bearing assembly with a carrying angle of 45