Recently was a discussion re: water jet - as Dave pointed out, X-Y is not a problem, the problem is a water jet. In this respect why not to make a pressure cylinder, instead of a high pressure pump, which could supply necessary pressure of the water jet? Present hydraulic cylinders can operate up to 10,000 psi, but this pressure can be increased without hugh cost overruns by increasing wall thickness and number of seals, number of tie rods. Then the piston can be driven by several hydraulic cylinders, providing an operation pressure. An orifice can be located at the other end of the cylinder. This seems to be not that hard to implement even at home shop. Just a thought. Alex
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