How to Choose a Compressor for Laser or Plasma Cutting: Key Criteria and Tips

May 14, 2025 at 4:00 pm

When working with laser or plasma cutters, it’s not just the cutting head that matters — auxiliary equipment like compressors plays a crucial role. A well-chosen compressor ensures cutting precision, machine longevity, and process stability.

Here’s what you should consider when selecting a compressor for your cutting system.

Why Do You Need a Compressor?

The compressor provides compressed air that:

Removes smoke and molten material from the cutting zone;
Cools the cutting area, protecting components from overheating;
Protects optics (for lasers) from contamination;
Forms plasma in high-pressure plasma cutting.

Clean, stable air = clean, consistent cuts.

Key Selection Criteria

1. Air Flow Rate (L/min or m³/h)

Your compressor should meet or slightly exceed your machine’s requirements:

Plasma: 200–500 L/min;
Lasers: 50–300 L/min.

Also factor in:

Hose and fitting losses;
Continuous operation needs;
Future equipment expansion.

2. Output Pressure (bar/MPa)

Lasers: 5–7 bar;
Plasma: 6–8+ bar.

Choose a unit with pressure reserve.

3. Air Quality

Especially critical for lasers:

Use filters and moisture separators;
For high-end needs, install an air dryer.

4. Compressor Type

Piston compressors – affordable, but noisy and less durable;
Screw compressors – more expensive, but quieter and made for continuous work.

5. Air Tank (Receiver)

Larger tanks provide smoother performance:

Plasma: 50–200 L;
Laser: 30–100 L.

Additional Tips

Consider noise level, especially for workshops;
Perform regular maintenance (oil, filters, condensate drain);
Ensure proper power supply (220V or 380V);
Allow for at least 20% performance headroom.

Conclusion

The right compressor protects your machine and boosts performance. Don’t cut corners — analyze your needs and choose wisely.