The technology of abrasive water jet is one of the methods of division and cutting materials with the lowest impact on the environment, since water is the cutting tool, in our case with the addition of an abrasive. The experiments were carried out on one kind of material - steel HARDOX 500 with a thickness of 10 mm. The impact of the change of the technological head’s feed rate on the size of the vibration acceleration amplitude and its frequency were examined. A database was created from the measured vibration values on the technological head and from that database the data was evaluated in selected softwares (LabVIEW, SignalExpress and Microsoft Excel). The results indicate that feed rates of 40 and 100 mm/min generate increased vibration intensity and reduced process stability, whereas the most stable cutting conditions occur at 50 mm/min, with feed rates of 200 and 400 mm/min also providing acceptable vibration behavior.