The objective of the paper is to obtain an optimal setting of CNC machining process parameters, cutting speed, feed rate resulting in optimal values of the feed and radial forces while machining P - 20 tool steel and EN31B with TiN coated tungsten carbide inserts. The effects of the selected process parameters on the chosen characteristics and the subsequent optimal settings of the parameters have been accomplished using Taguchi's parameter design approach.The process parameters considered are - Cutting speed 3000rpm, 2500rpm and 2000rpm. Feed rate 200mm/min, 300mm/min and 400mm/min and depth of cut is 0.2mm.The effect of these parameters on the feed force, radial force are considered for analysis.The analysis of the results shows that the optimal settings for low values of feed and radial forces are high cutting speed, low feed rate and depth of cut.The thrust force and feed force are also taken experimentally using dynamometer for above Cutting speeds, feed rate and depth of cut. The optimal values for speed, feed rate and depth of cut are taken using Taguchi technique.Taguchi methods are statistical methods developed by Genichi Taguchi to improve the quality of manufactured goods, and more recently also applied to, engineering, biotechnology, marketing and advertising.Process used in this project is milling process. Machine selected is Vertical milling center. Machine model selected is BFW Agni 45. Modeling is done in Pro/Engineer and analysis is done in ANSYS.