High-Pressure Coolant Seals for Deep Hole Drilling
High-pressure coolant seals are the weak link in every deep hole drilling machine. They operate at the boundary between rotating and stationary components, exposed to abrasive coolant, high pressure, and continuous wear. I have seen seal failures cause coolant leaks that damaged spindle bearings, contaminated gearboxes, and flooded machine enclosures. A single seal failure at the wrong time can cost $15,000 in repairs and three days of downtime. Where Seals Are Used The primary seal locations in a deep hole drilling machine are the rotating union (coolant inducer), the spindle draw tube connections, the coolant pump shaft seal, and the high-pressure hose fittings. Each location has different operating conditions and requires a different seal type. ...