1. Cylindrical roller process rough shape → deburring or belts → Polishing raceway → Polishing double-end heat treatment → → → coarse grinding the rolling surface before roughing double-end → → final rolling surface after roughing mill double-end → Fine, end mill raceway → super finishing rolling surface → washing, drying → final inspection appearance, size grouping → oiled packaging. Process 2. tapered roller rough shape → deburring or belts → Polishing raceway → Polishing double-end heat treatment → → → fine grinding rough grinding raceway base ball rolling surface → → final → ultra-fine grinding the rolling surface Processing raceway → washing, drying → final inspection appearance, size grouping → oiled packaging. These two rollers can be made crown-shaped bus rolling surface, if convex metric is less than 0.005mm, and can be performed directly over the rolling surface finishing process; if convex metric greater than 0.005mm, generally in the last final rolling mill surface processes grind crown, then super finishing. 3. The needle of the process deburring rough shape → → heat treatment → thick, thin, end mill raceway → super finishing rolling surface polishing or sawdust. For flat head and cone needle, such as the length of the rough molding it is difficult to guarantee the dimensional tolerance can be increased in the double-end mill rolling mill processes. If you need crown-shaped bus rolling surface, can be directly in the super finishing rolling surface or channeling light step. Process 4. Non-symmetrical spherical roller rough shape → deburring or belts → Polishing raceway → Polishing double-end heat treatment → → → ball mill aspherical end face of the end face → thick, thin, end mill raceway → polishing → washing, drying → final inspection appearance, size grouping → oiled packaging. Symmetrical spherical roller process is: rough shape → deburring or belts → Polishing raceway → Polishing double-end heat treatment → → → coarse roughing rolling surface, and finally double-end → fine grinding, finish grinding raceway → polishing → washing, drying → final inspection appearance, size grouping → oiled packaging. If the final step of grinding the rolling surface can reach the surface roughness, can not be polished