Comparing Rolled Ball Screws and Ground Ball Screws.

  High level roller and ground   ball screws seem to work almost identically in a wide range of mechanical applications. However, the surface of the raceway, which is very similar to the traditional machine screw threads found in common screw / nut systems, differs by the manufacturing process used to create these shapes. In addition to the reinforced ball bearings, which allow rotation movement, the ball screw system consists of two basic components: a lead screw with external threads and a ball nut with internal threads. Identifying two unique manufacturing processes used to manufacture these components is important to understand both the strengths and limitations of roller balls and ground ball screws. Rolling and Grinding:- The threads of the rolling ball screws are produced by pushing each blank uncut piece of bar through a rotating tool die in one operation. The driving principle of this process is the cold work deformation process, which literally molds the blank material w