New ways to increase the performance of metal cutting are constantly being sought. Although diverse and increasingly performing tools are designed and used, especially those with inserts, rarely new processing schema are identified in order to ensure favourable conditions to obtain a higher quality for generated surfaces. The paper presents a particular and innovative processing schema, as well as a specific tool for machining cylindrical surfaces by turning with a tangential cutting line. The active part of the latter is an insert whose cutting line is placed frontally in a vertical plane and considerably inclined in relation to the horizontal plane. In order to validate the concept, a variation of the tool has been developed and tested, one that doesn’t present the option of adjusting the angle of the cutting line. The success thus achieved prompted the design of a tool that allows the cutting line to be tilted at any angle in relation to the horizontal plane. A patent application has been filed in this regard.

The authors devised an innovative processing method, called turning with inclined tangential cutting line. To validate the concept a suitable tool was made, and experimental research was performed in order to evaluate the results from the perspective of the quality of the generated surfaces. The research program involved the processing of various materials with operating modes characterized by the same depth of cut, but different speeds and feed rates. The roughness of the obtained surfaces was measured using a high-performance electronic roughness meter. For comparison, processing under similar conditions was performed using a normal tool. This paper presents a number of experimental results and relevant conclusions supported by them. Also, some directions of further research are highlighted. The authors considered both logical and necessary outcomes after critical analysis of results and in terms of extending the parameters that characterize the designed process.