Abrasive Cutting Machine For your hard materials that cannot be machined with water only the water nozzle nut is replaced with the Active IDE abrasive cutting head the high velocity waterjet creates a vacuum which pulls the abrasive into a mixing chamber, producing a coherent, exteremely energic abrasive jet stream. This process is ideal for cutting intrecate patterns in sheet metals, composites, decorative stone, synthetic ceramics, glass etc.