Abstract One of the important phenomena of orthogonal cutting process is the occurrence of the minimum uncut chip thickness, as its highly affects the process of cutting initiation and surface roughness. But nowadays non orthogonal i.e., oblique cutting process using special tools with continued cutting edge and high value of cutting angle λs make new possibilities in the field of research. Hence, this paper presents the results of such analyzes and investigations of oblique cutting impact using tool with λs € on the minimum uncut chip thickness during free-radial turning of C45 steel using sintered carbide edges S3OS with rn = 18, 28, 90 μm, respectively. The results show that the experimentally determined minimum uncut chip thickness decreases with the increase of the value of the λs angle and in accordance with the derived theoretical Equations concerning the direction of the chip flow. Moreover, it establishes the possibility of significantly lowering the hmin value with the increase of the absolute value of the angle λs and it opens a new directions of tool edges for oblique cutting to finish machining and sheds new light on abrasive wear issues, during which micro-cutting may occur.