Plasma Cutters

Shop plasma cutters for metal fabrication, automotive repair, farm work, equipment maintenance and professional shop applications. Compare portable plasma cutting machines by recommended cut capacity, output amperage, input voltage, duty cycle and air requirements.

Whether you need a compact cutter for sheet metal and occasional repairs or a higher-output system for thicker material and frequent shop use, Welding District makes it easier to compare equipment and choose the right plasma cutter for your work.

Find the Right Plasma Cutter for Your Work

A plasma cutter uses an electrically charged plasma arc to cut electrically conductive metal. These machines are commonly used for fabrication, automotive work, farm repairs, equipment maintenance, demolition and general metalworking.

Choosing the right plasma cutter requires more than comparing maximum amperage. Consider the material thickness you cut regularly, available electrical service, compressed-air requirements, duty cycle, portability and ongoing consumable costs.

Recommended Cut Capacity vs. Severance Capacity

Cut capacity is one of the most important specifications to compare.

Recommended cut capacity generally represents a thickness the machine can cut at a practical speed while maintaining useful cut quality. This is the rating shoppers should focus on for their normal work.

Severance capacity represents a thicker material the machine may be able to cut slowly. A severance cut can require slower travel and may produce a rougher edge that needs additional cleanup.

Choose a plasma cutter based primarily on the material thickness you expect to cut most frequently rather than the machine’s maximum severance claim.

Output Amperage and Cutting Performance

Output amperage affects a plasma cutter’s ability to cut different material thicknesses, but amperage should not be evaluated by itself.

Machines with similar maximum amperage can differ in cutting speed, power efficiency, torch performance and recommended capacity. Review the manufacturer’s cutting charts and rated cutting speeds whenever they are available.

A higher-output machine may be appropriate for thicker metal and frequent shop use, while a smaller machine may offer greater portability for lighter repairs and occasional projects.

120V, 240V and Dual-Voltage Plasma Cutters

A 120V plasma cutter can be convenient for lighter work and locations where a compatible household-style circuit is available. Its cutting output may be reduced when compared with operation on higher-voltage power.

A 240V plasma cutter generally provides greater output for thicker materials and demanding applications. It requires the correct electrical circuit, plug and breaker capacity.

Dual-voltage plasma cutters provide flexibility for mobile users and operators who work in different locations. Depending on the model, performance and duty cycle may differ between 120V and 240V operation.

Always follow the manufacturer’s electrical requirements and verify that your power source can support the machine.

Compressed-Air Requirements

Many air plasma cutters require an external air compressor. The compressor must provide the airflow and pressure specified by the machine manufacturer.

The air supply should also be clean, dry and free from oil. Moisture and contaminants can affect cut performance, shorten consumable life and contribute to inconsistent operation.

When comparing plasma cutters, confirm:

  • Required airflow in cubic feet per minute
  • Required air pressure
  • Whether an external compressor is needed
  • Whether an internal air filter is included
  • Whether an additional moisture filter or dryer is recommended
  • Whether the system has a built-in compressor

A model with a built-in compressor may offer greater portability, but its cut capacity and duty cycle should still be compared with systems using external compressed air.

What Metals Can a Plasma Cutter Cut?

Plasma cutters are intended for electrically conductive materials. Depending on the machine, these can include:

  • Mild steel
  • Stainless steel
  • Aluminum
  • Copper
  • Brass
  • Expanded metal
  • Painted or rusted conductive metal

The recommended settings, gases, cut quality and maximum capacity can differ by material. Always review the manufacturer’s cutting chart before use.

Pilot Arc and Torch Starting

Some plasma cutters offer pilot-arc starting, which can help initiate and maintain the plasma arc without requiring the torch tip to make direct contact with the workpiece.

This feature may be useful when cutting expanded metal, painted surfaces, rusty material or uneven workpieces. Starting technology varies by manufacturer, so review the product specifications rather than relying only on the phrase “pilot arc.”

Handheld and CNC Plasma Cutting

A handheld plasma cutter is designed for manual cutting with a hand torch. Some systems can also support mechanized cutting when connected to a compatible CNC plasma table and machine torch.

A machine advertised as CNC compatible may require additional equipment, including:

  • Machine torch
  • CNC interface or control port
  • Divided-voltage output
  • Torch-height controller
  • Appropriate cutting table
  • Compatible software and motion controls

Do not assume every handheld plasma cutter can be connected to a CNC table. Confirm mechanized-cutting compatibility with the manufacturer.

Duty Cycle

Duty cycle indicates how long a plasma cutter can operate at a specified output before requiring a cooling period.

A smaller duty cycle may be sufficient for occasional repairs and short cuts. Fabrication shops and professional users who make long or repeated cuts should pay closer attention to the duty-cycle rating at the amperage they expect to use.

Input voltage can also affect duty cycle. Compare ratings at equivalent output levels and voltages when evaluating different machines.

Consumables and Operating Costs

Plasma torch consumables wear during normal operation and must be replaced periodically. Depending on the torch, consumable components may include electrodes, nozzles, retaining caps, swirl rings, shields or cartridges.

Before buying a plasma cutter, consider:

  • Consumable availability
  • Consumable cost
  • Expected service life
  • Torch replacement cost
  • Air-filter requirements
  • Manufacturer warranty
  • Availability of technical support

The lowest-priced machine is not necessarily the least expensive to own if replacement consumables are costly or difficult to obtain.

Features to Compare

When shopping for a plasma cutter, consider:

  • Recommended cut capacity
  • Severance capacity
  • Output amperage range
  • Cutting speed
  • 120V, 240V or dual-voltage input
  • Duty cycle
  • Compressed-air requirements
  • Built-in compressor
  • Pilot-arc capability
  • Drag-cutting capability
  • Gouging capability
  • CNC compatibility
  • Torch and lead length
  • Machine weight
  • Included consumables
  • Manufacturer warranty

Shop Plasma Cutters With Confidence

Welding District offers plasma cutting machines for home garages, mobile repair work, fabrication shops and professional applications. Compare cut capacity, power requirements, airflow specifications, duty cycle and included equipment to find a plasma cutter suited to the materials and projects you handle most often.

Plasma Cutter FAQs

What is a plasma cutter used for?

A plasma cutter is used to cut electrically conductive metal. Common applications include fabrication, automotive repair, equipment maintenance, farm work, demolition and metal art.

What metals can a plasma cutter cut?

Depending on the machine and its specifications, a plasma cutter may cut mild steel, stainless steel, aluminum, copper, brass and other electrically conductive metals. Plasma cutters are not intended for nonconductive materials such as wood, glass or plastic.

What size plasma cutter do I need?

Choose a machine whose recommended cut capacity covers the metal thickness you expect to cut regularly. Do not select a cutter based only on its maximum severance capacity, which normally represents slower cutting through occasional thicker material.

What is the difference between recommended and severance capacity?

Recommended capacity generally represents the thickness a machine can cut at a practical speed and useful quality. Severance capacity represents a thicker material the machine may be able to cut more slowly, often with a rougher finished edge.

Does a plasma cutter need an air compressor?

Many air plasma cutters require an external compressor that meets the manufacturer’s airflow and pressure requirements. Some portable machines include a built-in compressor. Review each product’s air requirements before purchasing.

What type of air does a plasma cutter need?

An air plasma cutter generally requires clean, dry and oil-free compressed air. Moisture, oil and other contaminants can reduce cutting performance and shorten consumable life.

Should I buy a 120V or 240V plasma cutter?

A 120V machine may be convenient for lighter work and locations without 240V service. A 240V cutter generally offers greater output for thicker materials and demanding work. A dual-voltage machine provides additional flexibility.

What is pilot arc on a plasma cutter?

Pilot arc is a starting system that can establish the plasma arc without requiring direct torch-tip contact with the workpiece. It may help when cutting expanded metal, painted surfaces, rusty metal or uneven material.

Can a plasma cutter cut aluminum?

Yes, a compatible plasma cutter can cut aluminum because aluminum is electrically conductive. Cut quality, capacity and recommended settings vary by machine and material thickness.

Can I connect a plasma cutter to a CNC table?

Only if the plasma cutter supports mechanized operation and provides the required connections. CNC use may also require a machine torch, control interface, torch-height controller and other equipment.

How long do plasma cutter consumables last?

Consumable life depends on air quality, cutting technique, material type, thickness, amperage and how frequently the torch starts and stops. Inspect consumables regularly and follow the manufacturer’s replacement instructions.