The cutting edge radius of a cutting tool plays a significant role in its durability. Durability is even more important when heavy duty materials are machined, including nickel alloy Inconel 718. The tool’s durability influences the overall efficiency of the cutting process, both technically and economically. This paper investigates the effects of the cutting edge radius on the final cutting forces generated when milling Inconel 718. The cutting edge radiuses are 15 µm; 20 µm and 25 µm. A three-component dynamometer was used for measuring the cutting forces, which were measured in the X; Y and Z axes. The force measurement was related to the cutting edge wear (VBB) of the clearance surface