Why I Stopped Trusting Coolant Pressure Gauges
I was running a job that still haunts me a little when I think about it. Forty titanium shafts, aerospace grade Ti-6Al-4V, each one needed a 14mm hole drilled 600mm deep. The material alone was worth about eight hundred dollars per shaft, and the customer had a delivery date that did not have any slack. The machine was a UNISIG BTA system with a 200-gallon coolant tank and a pump rated at 2000 psi. The gauge on the pump console read 1500 psi steady, which was right where it should be for that diameter and depth. Everything looked good on paper. ...