It varies with the softness or hardness of the material being cut. This can range anywhere from a 1/4 inch up to 30 inches thick.
Hard materials are normally cut within a 1/4 to 2.5 inch-range. This does not mean Stainless Steel or stone with a 4 or 5-inch thickness cannot be cut with a waterjet. It all depends on the purpose for which cutting is done (i.e. prototype, production, etc.), as well as the system operating conditions.
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