Air Rotary Union for Robot End-of-Arm Tooling

List the air functions at the robot wrist

List each gripper, release circuit, purge line, and blow-off function. Identify which functions operate simultaneously and which must remain isolated. Do not combine circuits simply because they use the same supply pressure.

Electrical power, sensor signals, data, coolant, or hydraulic service require their own compatible interfaces. A pneumatic rotary union can be part of a combined assembly, but the electrical and fluid requirements must be specified separately rather than inferred from the air-passage count.

Robot integration factors

• Motion and duty Provide axis rotation range, maximum speed, acceleration, reversals, cycles per hour, and whether unlimited rotation is required.
• Payload and envelope Include union mass, tool center of gravity, inertia limits, center-bore needs, wrist bolt pattern, and collision clearance.
• Piping and serviceability Support hoses, preserve bend radius, protect lines from pinch points, and leave access for fittings and replacement.

Drawings and data to send for EOAT review

1. Provide the wrist and tool drawings Show the robot flange, tool plate, centerline, mounting stack, and available space.
2. List each air circuit Include medium, pressure, flow, passage function, valve location, and simultaneous demand.
3. Provide the motion profile Include axis range, speed, acceleration, reversals, cycle time, and expected operating hours.
4. Validate on the robot Check leakage, hose behavior, collision clearance, payload data, and each tool function at reduced speed before full production.