Post: What Lens Shade to Use When Spot Welding Steel?

What Lens Shade to Use When Spot Welding Steel?

Spot welding stands as one of the most prevalent and often referenced forms of welding, yet it’s frequently misunderstood. Unlike arc welding, which generates an arc to fuse metals, spot welding utilizes electrical resistance, heat, and pressure to join metal pieces stacked atop one another. This technique involves pinching the two metal pieces together with pointed tongs, one set to a high voltage and the other grounded. The resistance to electricity flow heats the metal, facilitating the welding process. Notably, spot welding is highly localized, with heat concentrated only where the tongs meet, ensuring minimal heat dispersion across the workpiece, which subsequently cools rapidly.

Thanks to its mechanical simplicity, spot welding is easily automated, making it a staple in manufacturing processes. Think of the robots tirelessly welding car components together on assembly lines; they’re likely spot welders. Despite its prevalence, it’s common for non-welding professionals to incorrectly label various metal-joining techniques as spot welding. However, true spot welding is seldom practiced by hobbyists or in construction due to its dependence on specialized equipment and lack of portability.

Spot Welding Beyond the Basics

Spot welding’s precision and repeatability have led to its integration into diverse fields beyond heavy industry. It’s found its way into the fabrication of microelectronics, intricate mechanical assemblies, and even medical devices. Unlike arc welding, spot welding doesn’t emit a glaring arc, making eye protection less demanding. Typically, a Shade 5 lens suffices for spot welding, a stark contrast to the Shade 10 lens recommended for arc welding—a fivefold difference in darkness.

Ensuring Safety in Spot Welding Operations

While eye protection is paramount in any welding task, spot welding emphasizes the importance of quality safety glasses and potentially a face shield. These safeguards shield against flying chips or sparks that may occur during operation. However, selecting the appropriate lens shade isn’t solely about darkness; it’s about ensuring clear vision of the work at hand. In some setups, where the welding arc is fully enclosed by guards and shielding, a shaded lens might hinder visibility rather than enhance it.

Practical Safety Measures

Beyond eye protection, it’s crucial to wear attire that shields against flying sparks and particulates. This underscores the overarching principle of exercising common sense and reasonable caution in welding operations. Your vision’s safety hinges on these fundamental practices.


Spot welding’s simplicity, precision, and adaptability have cemented its role as a cornerstone of modern manufacturing. From automotive assembly lines to intricate electronic components, its applications span a broad spectrum. However, amidst its widespread use, clarity regarding proper eye protection and safety measures is indispensable. By understanding the nuances of lens shading and adhering to practical safety protocols, welders can ensure both the quality of their work and the preservation of their vision.

If you still aren’t sure which welding glasses are right for you, it’s a good idea to give us a call at 1-866-575-1307 or talk to us through our chat or e-mail us at

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