CNC machines use compressed air for tool changing, clamping, chip removal and cooling. Unstable or contaminated air causes machining errors and premature spindle damage. Here is what a CNC compressed air system needs.
Flow and Pressure
- Add the demand of all machine tools and actuators that run together.
- Most CNC applications need 7–10 bar of stable pressure.
- Keep pressure fluctuation low to avoid tool and workpiece errors.
Air Quality
- Dry air protects spindles and pneumatic components from corrosion.
- Filtration removes particles that could jam valves.
- Use a refrigerated air dryer for reliable operation.
System Design
- A screw compressor with a storage receiver smooths pressure.
- Variable-speed control matches output to machine demand.
- Size the system for peak simultaneous demand.
What pressure do CNC machines need?
Most CNC machines run on 6–8 bar, so a compressor delivering a stable 8–10 bar supply is typical.
Talk to an Engineer
Contact Panrui with your flow, pressure and air quality requirements to get a recommendation and factory quote for your project.