Cutting with air has become more popular through the years, though upfront expenses for specialty equipment, to ensure that air is delivered as clean as possible and with sufficient pressure, can be high. “Air is mostly nitrogen, so it’s inert,” Mercurio said, “but you do have other elements in the mix. That’s why people use it primarily on thin material, where there’s not much of an edge to look at. Also, you still need to have high pressure and high flow, so the typical air coming from a compressor might not have enough pressure to cut cleanly.”
Photo courtesy of Mazak Optonics Corp.
Still, the air sometimes has beneficial effects. Laser cutting aluminum with air, for instance, often produces a clean-looking edge. “That little bit of oxygen in the air gives aluminum cutting a little extra punch,” Mercurio said, “and changes what the edge looks like.”
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