A testing device in turning including, a six-component dynamometer, is used to measure the complete torsor of the cutting actions in the case of self-excited vibrations. For the tests, the insert tool used is a TNMA 160412 type carbide not coated, without chip breaker. The machined material is a chrome molybdenum 42CrMo24-type alloy. The test workpieces are cylindrical and have a diameter of 120 mm and a length of 30 mm. For the first time, we present an analysis of forces and moments for different depths of cut and different feed rates.