Common Mistakes New Deep Hole Drilling Operators Make
Mistake 1: Trusting the Pump Gauge I see new operators check coolant pressure at the pump gauge and call it good. That gauge can read 80 bar while the tool tip sees 45 bar. The difference comes from clogged filters, long hose runs, or a worn rotary union. I teach every operator to read the pressure at the tool-side gauge, not the pump. The fix is a simple habit: glance at the tool pressure gauge before hitting the cycle start button. If it’s below the minimum listed on the setup sheet, stop and investigate. This one check prevents more drill breakages than anything else I’ve taught. ...