Ball Spline

                                                                                                                  Design Principle

The ball spline has load groove of three row on the outside diameter of shaft. Due to the Gothic arch groove design, it could be make sure three grooves withstand clockwise or Counterclockwise of torque at the same time, and then increase the service life and rigidity.
The balls recirculation in ball holder, prevent balls falling from the spline nut while assembling.