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Plasma Cutting Consumables: What, Why, and How Long Do They Last?

 

Plasma cutters contain a number of consumable parts, which is unsurprising when you consider the very high temperatures involved in producing and focussing an arc of plasma. Keeping on top of the condition of these consumables is very important as it will help to ensure a consistent high-quality cut, and reduce the time involved in processing and refining your finished parts.

 

What Are Plasma Cutter Consumables?

 

Plasma cutter consumables are a set of components in your plasma cutter that gradually wear over time until they need to be replaced: they have a life cycle. The consumables are all found in the cutting torch itself, which is where most of the energy is focussed, and keeping track of wear and tear is a key part of maintaining an efficient machine that cuts well and lasts a long time. Plasma cutting torch consumables include:

Swirl Ring

This is a small component inside the torch that swirls the gas surrounding the plasma arc. This outer layer of gas helps to focus and direct the arc for greater cutting precision, and swirling it helps to keep it cool. As it is this protective layer of gas surrounding the arc that makes contact with the nozzle, the lower temperatures prevent the nozzle from burning up, and slow down degradation.

Electrode

The electrode is a narrow piece of copper containing hafnium (which is an excellent conductor of electricity). Its job is to receive the electrical current from a cathode block inside the torch to which it is connected, and to focus the charge through its tip, which causes it to arc onto the workpiece.

Nozzle

The nozzle focuses the plasma arc and the gas that surrounds it to make a clean and precise cut. A nozzle with a larger opening is used for gouging, while a nozzle with a smaller opening is better able to direct the gas and so is used for fine, detailed work.

Retaining Cap

The retaining cap essentially holds all of the consumable parts of the torch together. As temperatures at this end of the machine are extremely high, it

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Testimonials

  • "Having dealt with Esprit for 8 years now we have purchased 2 machines from them and found them to be extremely well built. The cut quality is excellent from the thinnest to the thickest plates. From sales and management to technical and service all of their team are knowledgeable, helpful and dependable. They have helped us to grow and as such we would always recommend Esprit."
    - John Ready I General Manager I Eggleston Steel Ltd.
  • "Thanks to our four Esprit Lightning HD1500 x 6.5 m machines the quality and quantity of BM catalysts being produced has increased exponentially."
    - Toby Massey I Managing Director I BM Catalysts Ltd
  • "Don't know why I didn't get one of these machines 10 years ago"
    - Ivan Patterson I Managing Director I Barker and Patterson