## 5 Conclusions  
This paper proposes a method for angular positioning of a round cutting insert in a torus cutter body. The method is dedicated to the process of multi-axis milling of sculptured surfaces, but it can also be successfully adopted for other variants of milling as well as  
Figure 14: Measurement results: (**a**) correctness of angular positioning; (**b**) maximum defect values for the segments obtained; (**c**) distribution of defect values along the worn active cutting edge. Figure 13: Round cutting insert: (**a**) after laser marking; (**b**) assembled in the cutter body and subjected to a first measurement verification after the first 20 s of operation. turning using the round cutting insert. The topic addressed in this paper is new and, according to the current state of knowledge, is being tackled for the first time. The novelty of this work, in addition to the method of angular positioning of the round cutting insert, is above all the comprehensive approach in terms of machinability and tool wear, so that the presented procedure can be used for any workpiece-tool materials pair. In addition, the proposed solution allows the full cutting capability of the entire edge length of the round cutting insert to be fully and predictably over time. The solution is essentially based on the tool wear model developed as part of this work, the tool life model, the way round cutting inserts are labeled and assembled, and the wear measurement methodology. Taking the above into account, a procedure was developed for the angular positioning of the round cutting insert in a torus cutter body. Based on the results obtained and the analyses carried out, the following key conclusions were drawn:  
* The adopted function for approximating tool wear over its lifetime is adequate and provides 90% prediction accuracy;
* The tool life model developed is essentially based on the cutting blade working angle parameter. This makes it possible to predict tool life for different machining conditions and for individual instantaneous positions of the cutting edge in relation to the workpiece surface (3D analysis), which is the subject of further work;
* The developed procedure for angular positioning and measurement enables the entire cutting edge of the blade to be fully utilized, so that the total lifespan of the tool as an assembly is significantly extended;
* The proposed solution also allows measurement and analysis of wear mechanisms, which significantly extends the possibilities of angular positioning of the RCI, taking into account its macro- and micro-geometric characteristics. * The method proposed in this paper was developed for a specific pair of materials, while the method procedure can be successfully applied to any other pair of workpiece-tool material pair. The results obtained allowed us to direct further research in the area of tool wear and, more specifically, the prediction of 'notching' wear, which in this work was identified as the highest value of the defect between the worn edge and the nominal outline of the RCI from the measurements. _The research leading to these results was carried out within the framework of international cooperation and [PERSON]'s research internship abroad._  
Conceptualization. [PERSON] and [PERSON]; methodology. [PERSON]; measurements. [PERSON] and [PERSON]; modeling and validation. [PERSON]; formal analysis. [PERSON]; investigation. [PERSON], [PERSON] and [PERSON]; resources. [PERSON], [PERSON] and J.H. ; data curation. [PERSON] and [PERSON]; writing--original draft preparation. [PERSON]; writing--review and editing. [PERSON] and [PERSON]; visualization. [PERSON]; supervision. [PERSON]; project administration. [PERSON]; funding acquisition. [PERSON] and L.K. All authors have read and agreed to the published version of the manuscript. This research received no external funding. Not applicable. The original contributions presented in the study are included in the article, further inquiries can be directed to the corresponding author. The authors declare no conflicts of interest.