This video demonstrates the metal removal rate in hard metal that is possible with constant-engagement-angle milling, using a tool designed specifically for this style of machining.
The material is Inconel 718. Keeping the engagement angle constant keeps the load on the tool constant—as heard in the steady sound of the cut while the tool is machining. This means the overall cycle is free mill more aggressively.
TrueMill CAM software from Surfware provides the steady-load tool paths. The milling tool designed to take advantage of these tool paths comes from Swift-Carb. For more detail about both, see the article under “Editor Picks” at right.