## 4 Results and Discussion
### Analysis of Theoretical Possibility for Increased Tool Life by Using the Developed Tool  
An analysis of the contact conditions between the cutting element and the machined surface was carried out for the developed tool. Given the radius of the tool with a cylindrical element (\(r_{\varepsilon}\) = 1.5 mm), the values for 2\(\alpha\) (Equation (1)) and \(\alpha+\beta\) (Equation (2)) angles were calculated for different values of feed f. Figures 16 and 17 show graphs of the results. Results of calculating the theoretical number of edges for the developed tool with a cylindrical element and \(r_{\varepsilon}\) = 1.5 mm are presented in Figure 18 for the \(\delta\) = 2\(\alpha\) strategy and in Figure 19 for the \(\delta\) = \(\alpha+\beta\) strategy. The theoretical results are presented from f = 0.2 mm/rev because, owing to the minimum uncut chip thickness effect of MUCT, it is not advisable to use small feed rates, as this increases the surface roughness, especially for a larger corner radius \(r_{\varepsilon}\)[31; 32]. Different values for the resharpening number of cycles are presented. Because the \(\beta\) angle does not depend on feed, we can observe a very small effect of feed on i for the \(\delta=\alpha+\beta\) strategy. Figures 18 and 19 were prepared using a different scales for i. For directly comparing the theoretical number of edges using SEWCE strategy, Figure 20 presents a comparison of results for the \(\delta\) = 2\(\alpha\) and \(\delta\) = \(\alpha+\beta\) strategies, given the middle value of z = 10 and feed f = 0.4 mm/rev. Figure 16: Effect of feed on the 2\(\alpha\) angle for \(r_{\varepsilon}\) = 1.5 mm. Figure 15: Comparison of experimental and theoretical values for the surface roughness Ra parameter. Figure 19: Influence of feed rate on edges using the \(\delta=\alpha+\beta\) strategy for application of \(\tau_{e}=1.5\) mm insert with a different number of resharpening cycles z.  
Figure 17: Effect of feed on the \(\alpha+\beta\) angle for \(\tau_{e}=1.5\) mm. Figure 18: Influence of feed rate on edges using the \(\delta=2\alpha\) strategy for application of \(\tau_{e}=1.5\) mm insert with a different number of resharpening cycles z. This is only a theoretical comparison of a possible number of edges using SEWCE and the resharpening effect in applying the tool. Of course, to find the optimal solution, subsequent experimental research is needed to understand the actual process of cutting-edge wear and the application of the SEWCE effect. Previous research [28] found that it needs to use more than two times \(\delta=2\alpha\) rotation to obtain surface roughness similar to the new edge. This ensures multiple increases in the hypothetical number of edges that can be obtained with the reproduction of cutting properties by partially replacing the worm part of the cutting edge. It also allows the entire cutting edge to be restored by sharpening the rake surface, ensuring a repeat cycle. The analysis of the developed tool shows the advantages of the new solution and demonstrates the possibilities for re-creating the cutting properties of its cutting edge. However, this requires confirmation through experimental studies. At the same time, the usefulness of the solution presented should be emphasized owing to obtaining a tool with a relatively small, i.e, much smaller than commercial, cutting-edge radius \(r_{\varepsilon}\). This creates new opportunities for shaping the surface with cutting edges with a circular arc. The solution is characterized by a simple design ensuring a significant reduction in tool costs. The article opens a new area in research for achieving savings in cutting materials for environmental protection and reducing machining costs. Using a new tool solution with a cylindrical cutting element of a small diameter extends the possibilities for finishing with a circular cutting edge. The SEWCE presented for increasing tool life and reducing cost appears more effective than the conventional methods. It should be noted that this also applies to tools with a straight cutting edge.