The arc radius rε and the secondary declination angle κr' are generally selected according to the requirements of the machining surface roughness. The inclination angle γS is determined according to the required chip evacuation direction and edge strength. The type of turning tool in front is mainly determined by the nature of the workpiece material and the tool material. The simplest is the flat type, and the flat type with positive rake angle is suitable for high-speed steel turning tools and cemented carbide turning tools for finishing.
