At Arc Torchology, we’re dedicated to solving key challenges in welding. We recognise that the coaxial cable is a significant contributor to issues with torch weight, manoeuvrability, and welder fatigue. This direct impact on performance has driven us to make substantial improvements to this critical component.

Historically, early developments in copper-clad welding cables were driven primarily by a desire to reduce costs through the use of inexpensive raw materials. This cost-cutting mentality, often combined with poorly tested products, led to widespread issues like overheating and premature breakage, causing an understandable lack of confidence in this type of welding cable, and a drive to reject anything that wasn’t the industry standard of “pure copper”.

Arc Torchology has taken a different approach, utilising copper-clad cable not as a cost-cutting measure, but as a superior technology. Our commitment is to an uncompromising solution: a cable that not only matches the performance of traditional pure copper but surpasses it by being significantly lighter. A properly engineered cable is not just “good enough” – it’s the best for the job, delivering exceptional performance without any trade-offs.

The Drive for Weight Reduction

It’s clear that reducing the weight of the welding torch and its cable has substantial benefits in welder comfort and productivity. The welding cable makes up a significant proportion of the torch’s overall weight, and so it follows that optimising its weight is key to reducing muscle strain and fatigue from prolonged periods of welding. Arc’s high performance lightweight cables can achieve up to a 30% reduction compared to standard copper cables, a change that directly translates to improved control, reduced fatigue, and enhanced weld quality.

Why Copper-Clad Aluminium

Achieving significant weight reduction without compromising electrical conductivity or durability is a complex challenge. Attempting to reduce the weight of a pure copper cable by just reducing the amount of copper used would compromise its electrical performance and pose serious safety risks, including severe overheating. Arc’s preferred approach includes incorporating lighter materials. Copper-clad aluminium leverages the advantages of both metals – maintaining the superior conductivity of copper, combined with the lightness of aluminium.

Advantages of Copper-Clad Aluminium

• Significant Weight Reduction: Aluminium has a much lower density than copper. By utilising an aluminium core with a copper cladding, Arc achieves a substantial reduction in cable mass. Importantly, even though the cross sectional area of the cable needs to be increased slightly to match the amperage rating of pure copper, there is still significant weight saving – and the use of Copper-clad Aluminium is deliberate engineering decision to optimise the power-to-weight ratio.
• Optimised Electrical Conductivity and Corrosion Resistance: A concern with the use of pure aluminium is oxidisation, forming a layer on the surface which can increase resistance and generate heat. However, the copper cladding effectively mitigates this issue. By enclosing the aluminium core, the copper layer prevents oxidation, ensuring efficient current transfer. The copper also provides corrosion resistance, contributing to a cooler operating cable and reliable performance.
• Physical Cable Strength: Its no secret that aluminium has lower tensile strength than copper, particularly under repetitive stress. However through intelligent cable engineering, Arc has mitigated this issue, incorporating design elements to absorb and distribute mechanical stress, ensuring long-term durability in demanding operational environments.

Quality in Cables

It is obvious that the market contains variations in cable quality, and it is crucial to differentiate between engineered products and low-cost alternatives that can undermine the perceived benefits of if this technology. Inferior cables often suffer from the following issues:

• Inadequate Copper Cladding: “Cheap” cables may feature a thin, inconsistent, or porous copper layer. This compromises the protective barrier, allowing oxidation to occur, leading to increased resistance, excessive heat generation, and premature cable failure. Arc Torchology’s cable features a precisely applied copper cladding to ensure enduring performance.
• Compromised Conductivity: Inferior cables often reduce manufacturing costs by utilising less copper. This directly compromises the cable’s electrical conductivity, leading to a significant increase in resistance. Consequently, this reduces welding performance. Arc Torchology has carried out stringent testing to ensure optimal conductivity and full, stable power delivery, and has verified that our copper-clad cable matches the conductivity performance of full copper cables of the same specification.
• Physical Stress: Without design features to counteract the lower tensile strength of aluminium, cheap cables are highly susceptible to breakage under repeated bending and flexing, significantly shortening their operational lifespan. Arc has implemented key design features to ensure the long-term durability and consistent performance of the cable. This is further proven by our rigorous flex tests, which have shown our cables can withstand over 300,000 cycles with less than 5% wire breakage, demonstrating superior longevity.
• Superior Flexibility and Cooler Operation: Due to their unique construction, Arc’s cables are significantly more flexible than pure copper cables of equivalent performance. In addition, because the cross-section of the copper-clad cable is slightly larger to compensate for conductivity differences, the aluminium core benefits from a higher specific heat capacity. This results in the actual operating temperature of the copper-clad cable being lower than that of a pure copper cable under the same load, enhancing safety and comfort.

Engineering for Enhanced Performance

The integration of copper-clad aluminium in lightweight welding torch cables represents an advancement in welding torch design. When properly engineered, Copper-clad cable offers a powerful combination of substantial weight reduction, efficient electrical conductivity, and robust mechanical performance. Arc have achieved this through precise manufacturing processes that ensure optimal copper cladding, appropriate conductor sizing, superior jacket materials, and integrated stress-mitigation features.

The choice of a lightweight torch cable should be based on a thorough understanding of its material composition and construction quality. At Arc Torchology, our commitment to superior construction quality is demonstrated through attention to every stage of the manufacturing process. This includes precision stranding of conductors, robust insulation layering for enhanced durability and heat resistance, and rigorous testing protocols to ensure consistent performance under extreme conditions. Our team meticulously designs the cable’s internal architecture to manage stresses effectively, guaranteeing a product that not only feels lighter but performs reliably over its lifespan.

High-quality cables provide tangible benefits in terms of reduced operator fatigue, improved manoeuvrability, and consistent welding performance. It is key to distinguish these cables from their cheaper counterparts, which often compromise on critical areas.  With the cable playing such an essential role, it is vital to select the right cable to ensure both operational efficiency and long-term reliability.

For more information on the Arc M Series, click here