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                  Internal  FIG.1          FIG.2              FIG.3            Right Hand Thread-  Conventional Milling  FIG.4  Left Hand Thread-  Conventional Milling








             Thread Milling Methods  External  FIG.1  Best   Recommended  Right Hand Thread-Climb Milling  FIG.2  Best   Recommended  Left Hand Thread- Climb Milling  FIG.3  Right Hand Thread-   Conventional Milling  FIG.4  Left Hand Thread-  Conventional Milling





















                         example,the path from point A to point B (Fig.A) on the surface of the cylinder making a
                  capable of helical interpolation is required.Helical interpolation is a CNC function producing
                In order to perform a thread milling operation, a milling machine with three-axis control
                       in one plane with a simultaneous linear motion in a plane perpendicular to the first. For
                    movement movement along helical path.This helical motion combines circular movement

                           cicular movement in the xy plane with a linear displacement in the z direction.






                                                                                         FIG.A









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