The process consists in the local melting and blowing out of the melted metal with creation of the cut cavity when the plasma cutter is moved on the metal being cut. WaterJet cutting The tool for the water jet cutting is a specially formed liquid flow, coming out from a special nozzle with diameter 0.08 – 0.5 mm at the supersonic speed (1000 meter/second and more) which provides a working pressure of 400 Mpa and more on the workpiece.