Waterjet machine uses cold supersonic abrasive erosion to cut almost any materials both metals and nonmetals. The highly pressurized water stream is forced through a tiny area which carries abrasive garnet to erode away the material.
Abrasive waterjet and pure waterjet both start with pressurized water, water is pressurizes up to 60,000 p.s.i, or 4100 bar, then is transported to the cutting head where the pressurized water passes through a tiny hole in jewel orifice. The pressure is exchanged for velocity which is what the waterjet cuts with, waterjet actually erode the material they are cutting. After we pass the waterjet stream through orifice, the garnet abrasive similar to that you find on to sand paper is feed through a delivery line which is located on the side of the cutting head, where it is pulled in to the waterjet stream via vacuum effect, and accelerated down the mixing tube. The abrasive garnet is mixed in to water-stream and is accelerated like a bullet out of a rifle.