What is Free Flow Machining ? Free Flow machining establishes a new approach to the generation of toolpaths. The approach uses technology that follows the natural topology of the part to be machined but without being limited to the mathematics of the individual surfaces. The technology is not dependant on the way that the part was modeled. In this area the approach is a major advance on over the traditional methods that are driven directly off the basic geometry of each surface. Free flow Machining can be compared to the concept of a fluid flowing through or over the part to be machined. The result is free flowing paths that naturally follow the contours of the overall part and is not constrained by the maths of localized surface elements. Free Flow machining technology is incorporated in the new Streamline Toolpath, released in NX 5.