Plasma cutting is a fast and precise method of metal cutting used both in home workshops and industrial production. If you’re considering buying a plasma cutter or want to learn more, here are 10 of the most frequently asked questions we encounter.

What is the difference between plasma and oxy-fuel cutting?

• Plasma cutting uses an electric arc and compressed air (or gas) that ionizes into plasma. It is suitable for steel, aluminum, and stainless steel.
• Oxy-fuel cutting (with oxygen and acetylene) burns the metal using a flame. Mainly suitable for carbon steel.

Plasma = cleaner cut, less deformation, higher speed.
Oxy-fuel = robust, ideal for very thick materials.

Can I cut aluminum or stainless steel with a plasma cutter?

Yes. A plasma cutter can cut:

• Carbon steel
• Stainless steel
• Aluminum
• Copper and other conductive metals

You just need proper settings, sufficient machine power, and clean workpieces.

What power output do I need to cut 10 mm steel with plasma?

Recommended actual cutting capacity:

• For 10 mm steel, it's ideal to have a machine with at least 40–50 A output
• For a clean and precise cut, we recommend a 10–20% cutting reserve

Beware of the difference between "maximum" and "optimal" cutting thickness – maximum doesn't always mean quality.

Is plasma cutting suitable for a home workshop?

Yes, modern inverter plasma cutters are lightweight, compact, and easy to operate.
They are suitable for:

• DIY and maintenance work
• Metal fabricators
• Car restoration or gate fabrication

Just make sure to have sufficient power supply and an external compressor.

How often should electrodes and nozzles be replaced in the torch?

Lifespan depends on:

• Air pressure
• Quality of electrodes and nozzles
• Current load

General recommendations:

• Electrode: replace after 1–3 hours of cutting
• Nozzle: replace if precision drops or the hole becomes deformed

TIP: Always keep spare parts on hand.

Do I need an external compressor for a plasma cutter?

Most plasma cutters require a compressed air supply.
Options:

• With built-in compressor – for light and mobile use
• Without compressor – must be connected to a shop compressor with 4.5–6 bar pressure

For more frequent and higher quality cuts, we recommend an external compressor with a pressure regulator and water separator.

Is plasma cutting safe when used correctly?

Yes, but safety rules must be followed:
Hazards: sparks, UV radiation, heat, noise
Solution: protective gear, grounding, quality torch and clean air

Following health and safety principles is key to a safe workspace.

What protective equipment is essential?

For plasma cutting, we recommend:

• Welding helmet with DIN 5–8 (cutting mode)
• Leather gloves and apron
• Protective goggles (for visual inspection of the cut)
• Hearing protection and respirator (for extended dusty work)

Safety in plasma cutting is just as important as in welding!

Can a plasma cutter be connected to a CNC machine?

Yes. Many professional plasma cutters offer:

• CNC connector (Pilot arc or 2T/4T)
• External arc ignition
• Precise power supply for CNC control

CNC plasma is ideal for serial production and precise shapes.

What to do when the plasma arc fades or shuts off?

Most common causes:

• Worn electrode or nozzle
• Contaminated or moist air
• Low compressor pressure
• Poor grounding contact
• Interrupted pilot arc (in CNC setups)

Solution: clean, check parts, refill air or replace worn components.

Conclusion

Plasma cutting offers high precision, speed and flexibility. Whether you are a beginner or an experienced craftsman, choosing the right equipment, performing maintenance and working safely is key.