A rotary union is required to supply coolant through the air tube assembly, or for the AL-Automatic Lubrication option. Rotary unions can be mounted to the rear of LDZ Air Cylinders to supply coolant or air through the machine spindle to the workholding fixture.

The rotary union threads into the rear of the air tube and includes a hose and fittings.
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Model

Fitting Size (Inlet Port)

Rotor Thread

Max. Air Pressure

Max Speed

Air Tube Model

RU-10 N/A 1/8"-27 NPT N/A 3/8" - 32 UNEF N/A 150 psi10 kg/cm² N/A 6,000 rpm Rotating Air Tubes
Model 50, Rotating Air Tubes
RU-20 N/A 1/4"-18 NPT N/A 5/8" - 18 UNF N/A 150 psi10 kg/cm² N/A 4,000 rpm Rotating Air Tubes
Model 82, Rotating Air Tubes
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