Paul, You can check out Omax's website for all the details, but it uses 60,000 PSI and an injection of garnet in the water stream.(Kind of like a wet sand blaster). We clamp the work down to the grid, then flood the table so all the cutting happens under water. It's really very quiet. The cutting nozzle shoots down on the workpiece from about 1/8 inch away and is on a computer controlled arm which gives it an accuracy of .003". all cuts are made following CAD drawings in the computer. I cut two tiny little parts out of .02" steel today. little clips about the size of mini fuses. It took less than 30 seconds to cut both of them. On the flip side I made a few pieces from 1/2" mild steel too. They took much longer (Bout a half hour for a pair of spacers about 6x11)
It'll cut anything from tungsten to glass. I gotta make some rubber washers tomorrow.
It's impressive.
(see the Triumph forum for my project idea...hehehehe)