How to Read the Coolant Pressure Gauge During Gun Drilling: Diagnosis by the Numbers
The coolant pressure gauge is the most informative instrument on a gun drilling machine. It tells you about chip evacuation, pump condition, filter status, and drill condition — all in real time. But only if you know what to look for. I have spent years learning to read pressure patterns. Here is what I have found. Where to Measure Pressure The pressure at the pump gauge is not the pressure at the tool tip. I install gauges at two locations: ...