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. This cutter is usually connected to a high-pressure water pump with the water being released from the nozzle, which then cuts through the material with high-speed water. To help cut the materials abrasives are added to the water. With waterjet cutting, the working environment of the machine operator is greatly improved and thus reduces problems of exposure.