Water jet machining, including cold cutting process, so that the heat does not arise. Thus not occur heat damage such as thermal distortion, HAZ (Heat Affected Zone), thermal stress (thermal stress) on the surface of the cut and others. Other than that, water jet machining (WJM) including cutting process is environmentally friendly, because it does not happen melting material or by-products (byproduct) were dusty, the surrounding air is not polluted, not toxic and is safe from fire hazards.Water jet as a chisel cutting (cutting tool) having the power cut almost unlimited, because the water jet can cut a variety of materials from soft to hard, from the ductile to tough with a high economic level. Therefore WJM developed rapidly in the architecture industry, aerospace, automotive, manufacturing, food and fruits, board and paper products, coal mines and so forth.
