Other technologies employed in hydraulic sheet cutting machine tool designs include water jet and oil jet cutting and the use of ultrasound. Water jet cutters are so powerful that they can cut granite, and can attain an accuracy level of 0.005 inches (0.013 millimeters). They work by pumping a fine stream of water that contains an abrasive substance at a surface, at anywhere from 40,000 pounds per square inch (PSI)(276 mega-pascals) to 100,000 PSI (689 MPa). Ultrasound cutters work by setting up high-frequency vibrations in the material being cut, and are used in cutting both fabrics and metals.

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