Rotary unions are essential components in modern machine tools, enabling the efficient transfer of coolant, water, compressed air, and hydraulic oil from stationary systems to rotating spindles. Designed for high-performance CNC machining centers, they operate reliably at pressures from 10 to over 150 bar and speeds ranging from 2,500 to 15,000 RPM — ensuring continuous operation, precision, and long service life.
Machine tool applications demand rotary unions that keep pace with high-speed spindles while holding a leak-proof seal across coolant, air, and hydraulic circuits — cycle after cycle.
Deliver coolant directly through the rotating spindle to the cutting tool tip — clearing chips and controlling heat at the point of cut for higher feed rates and longer tool life.
Transfer a precisely metered air-oil mist through the rotating union to the tool — reducing coolant consumption while maintaining effective lubrication at the cutting edge.
Supply hydraulic oil to rotating clamping cylinders and fixtures — holding workpieces securely in place through high-speed machining cycles.
Route compressed air through the rotating union to clear the tool taper and actuate automatic tool-change sequences, keeping changeover times fast and reliable.
The CARBON series below are specified most often for machine tool and CNC spindle applications. Final selection should be confirmed against your operating pressure, temperature, and RPM.