Manufacturing technology of the cylinder spur internal gears used on clutch is studied

and comparison with the cold extrusion technology. The defaults of large load

serious wear and tear on mold flange and short lifetime in cold extrusion have been overcomed by the technology. The problem of the quality no good is resolved. A full and level up end gear is producted. The application of fold extrusion process prolong the lifetime of mold’s . It may use in practice of produce.