CNC plasma and oxy-fuel cutting: Frequently asked questions

January 31, 2024

The landscape of metal fabrication is a constantly evolving one, and at the forefront of this process are two pivotal technologies–CNC plasma cutting and oxy-fuel cutting. While both methods play critical roles in shaping and repairing heavy machinery, they operate under distinct principles and cater to different material needs. In this blog, we’ll answer our most frequently asked questions, explaining how these advanced technologies work, their unique advantages, and how to select the right approach for your fabrication projects.



What is CNC plasma cutting?


Plasma cutting is a proficient method for cutting through various conductive metals, including stainless steel, aluminium, and brass. This process involves generating a plasma jet through the ionisation of gas at high temperatures, effectively slicing through metal with remarkable speed. CNC plasma cutting takes this a step further and integrates computer-controlled tech for improved accuracy and intricacy in cuts, allowing it to effectively accomplish detailed and complex designs.


What is oxy-fuel cutting?


Oxy-fuel cutting, on the other hand, is a traditional technique primarily used for cutting and shaping steel. This process combines oxygen with a fuel gas – typically acetylene, propane, or propylene – to create a high-temperature flame capable of melting steel. It is particularly effective for thicker materials where plasma cutting may not be as efficient.


Which one will suit your machine’s needs?

When it comes to choosing between CNC plasma cutting and oxy-fuel cutting, the decision largely depends on the specific needs of your machine and the nature of your project. 


CNC plasma cutting is renowned for its precision and speed, making it an ideal choice for projects requiring detailed, intricate work on a variety of conductive metals, such as stainless steel, aluminium, or brass. If your project involves complex patterns or designs on materials like stainless steel, aluminium, or brass, CNC plasma cutting is likely to be the better option. However, oxy-fuel cutting excels in handling simpler projects that use thicker steel metals for industrial applications.


At ST Engineering, we specialise in CNC plasma cutting and oxy-fuel cutting, providing these specialised services in line with your needs. Whether you require precision cutting for complex designs or solutions for working with thick steel, our expert team has the expertise to deliver the highest quality outcomes.


Get in touch with the ST Engineering team today and see how we can help you with your heavy machinery repair needs.



FAQs

  • What is the maximum thickness a plasma cutter can cut through?

    It largely depends on the specific model and power of the plasma cutting system. Handheld plasma cutters can cut through metal up to 1 inch (25mm) thick; however, stronger automated machines can cut up to an impressive 5 inches (127mm) in thickness. However, it’s important to note that while plasma cutters can handle a range of thicknesses, the quality of the cut may diminish as the thickness approaches the upper limit of the cutter’s capabilities.

  • Is oxy-fuel cutting expensive?

    Comparatively, oxy-fuel cutting is less expensive in terms of equipment and operational costs, especially for projects that don't demand the high precision of plasma cutting. Its simplicity and effectiveness in cutting through thick steel make it a cost-effective solution for straightforward, heavy-duty cutting tasks. 

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