Air Rotary Union for Automation Rotary Tables

Match the union to the table cycle

An index-and-dwell table and a continuously rotating table impose different motion and duty conditions. Record the real speed during motion, acceleration frequency, dwell time, cycles per shift, and whether pressure must be maintained while the table is stationary.

Count independent functions rather than simply counting hoses. Clamp and release may need separate passages; several identical fixtures may share a manifold only when the machine circuit permits it. A required center opening for cables, shafts, or tooling can be as important as passage count.

Interface checks for a rotary table

• Pneumatic circuit Define every passage function, flow direction, pressure, flow demand, and acceptable cross-connection risk.
• Table geometry Confirm center bore, pilot diameter, bolt pattern, axial length, port orientation, and access for fittings.
• Loads and alignment Support hoses and manifolds independently so table runout, bending load, or anti-rotation hardware does not load the rotary union.

From table drawing to model selection

1. Share a section view Show the table centerline, fixed and rotating parts, available envelope, and adjacent cables or shafts.
2. Attach the circuit diagram Identify which functions operate together and which must remain isolated.
3. State the real cycle Include normal and maximum pressure, speed, temperature, starts per hour, and hours per day.
4. Verify the assembled table After alignment, test every passage at rest and during controlled rotation before production use.