Guide to Waterjet Cutting and Its Benefits Since the 1950s, waterjet cutting has been around, developed as a way to cut lumber from large trees. Because of advancements and improvements through the year, the waterjet method has been used in many applications in cutting flat materials including stainless steel and aluminum. With the use of high pressure stream of water, the waterjet method can cut of clean different materials. The waterjet is usually connected to a high-pressure water pump which releases water from a nozzle which then cuts through the materials at high speed. To help in the process, they put additives in the form of abrasives. With waterjet cutting, the working environment of the machine operator is greatly improved and thus reduces problems of exposure.