Postupak obrade materijala vodenim mlazom spada među mehaničke postupke obrade, kao i obrada abrazivnim vodenim mlazom, pri kojem čestice abraziva velikom brzinom napuštaju mlaznicu u reznoj glavi i udaraju u obradak. Obrada čistim vodenim i abrazivnim vodenim mlazom idealna je za rezanje različitih materijala, tako da sve više zamjenjuje obrade plazmom i laserom, s tim da ima širu primjenu, jer se sa vodenim abrazivnim mlazom mogu obrađivati gotovo svi metalni i nemetalni materijali, male i velike tvrdoće.

The method of processing materials waterjet is among the mechanical processing operations as well as processing abrasive waterjet in which abrasive particles rapidly leave the nozzle in the cutting head and hitting the workpiece. Waterjet cutting with pure water and the abrassive waterjet system is an ideal machine for the cutting of various materials and is extremely versatile compared to alternative machinery such as lasers and plasmas, because with abrasive waterjet you can cut steel and non-steel materials.