Seal and O-Ring Selection for High Pressure Coolant Systems
High pressure coolant systems in deep hole drilling machines operate at 1000-3000 psi. The seals and O-rings that contain this pressure need to be selected carefully. A failed seal causes pressure loss, downtime, and can ruin a workpiece mid-cycle. I have learned these lessons the hard way over eight years of maintaining high-pressure coolant systems across a dozen machines. Material Selection by Operating Conditions The seal material must withstand the coolant chemistry, temperature, and pressure simultaneously. I have tested five materials extensively and settled on the following guidelines: ...