To model the milling process, you need an accurate model of the cutting tool. The article presents a methodology developed for designing a part with replaceable "end milling cutter" plates in a three-dimensional configuration. The model of a "face milling cutter" type with carbide inserts includes a large number of variables, such as diameter, number of teeth, their clearance angles, and the like. Therefore, the geometry of such a cutting tool is chosen on the basis of similar details studies. The proposed model was developed using the CAD system of SolidWorks. The cutting insert deformation of the milling cutter in the SolidWorks Simulation module is analyzed, as a result of the calculated cutting force acting on it, it is determined that the cutting inserts meet the accuracy requirements for surface treatment of grade 2-4.