Single-passage GD and single-passage GDP rotary unions feature permanently closed sealing surfaces. The unique seal is compatible with all conventional media and even allows for unlimited dry machining, reducing leakage to a minimum.

The high-quality built-in hybrid bearings have low coefficients of friction and a longer grease service life, allowing them to guarantee long-term functionality at high speeds. A labyrinth seal effectively protects the bearing against contamination, helping to maximise its life span. The coolant connection can be rotated up to 360° to make it easier to install. All GD rotary unions are available with radial and axial connections. Maintenance cycles can be calculated, which ensures optimal availability.

GD rotary unions are attached to OTT-JAKOB unclamping units. The installation diameter of 48 mm (GDP 32 mm) defined by OTT-JAKOB remains the standard in the industry to this day.

Based on the standard types, the OTT-JAKOB product range also includes various special rotary unions designed for special milling and boring applications, such as:

• For higher flow rates
• For higher speeds
• For limited space
• With integrated leakage sensors

Contact us to find the optimal solution for your applications.