In machining environments, temperature control isn’t optional—it’s essential. Excess heat reduces tool life, warps materials, slows production, and increases scrap rates. Traditionally, shops have relied on liquid coolant systems to manage these challenges. But as processes evolve and industries push for cleaner, safer, and more efficient operations, EXAIR Cold Guns have become a compelling alternative.
So how do Cold Guns stack up against traditional coolant? Let’s break it down.
What Makes an EXAIR Cold Gun Different?
An EXAIR Cold Gun uses a vortex tube to convert compressed air into a focused stream of cold air. There are no moving parts, no chemicals, and no maintenance-heavy equipment like pumps or filters. Once installed, it simply delivers reliable cooling—often dropping air temperatures as low as 20°F—to keep tools and work pieces from overheating.
The appeal is simplicity: clean, dry cooling without the mess that comes with managing coolant.
Cooling Performance: Cold Air vs. Liquid Coolant
Liquid coolant still holds an advantage in applications that rely heavily on lubrication. Operations like deep pocket milling, tapping, or cutting difficult metals benefit from the coolant’s ability to both cool and lubricate the cut.
Cold Guns excel where pure cooling is the priority. For grinding, engraving, routing, plastics machining, and many dry-cutting processes, the Cold Gun delivers consistent, targeted cooling that improves tool life and part finish without introducing moisture or chemical residue. For many shops, that alone makes it a better fit—especially when contamination is a concern.
Cleanliness, Maintenance, and the Work Environment
Coolant brings with it a certain level of maintenance. Tanks have to be cleaned, concentration levels must be monitored, and filters, pumps, and lines require regular attention. On top of that, coolant mist can create slippery floors and lingering odors and can irritate skin or eyes.
A Cold Gun eliminates these issues entirely. The cooling air is clean, dry, and chemical-free. There’s no mist to manage, nothing to wipe down, and no system to maintain. For applications involving electronics, wood, plastics, food-grade parts, or any material sensitive to contamination, this alone often decides the debate.
Cost of Ownership and Long-Term Value
Coolant systems can become expensive over time—not necessarily because of the initial installation, but because of everything required to keep them running. Disposal costs, replacement fluid, lost production during cleaning, and equipment upkeep all add up.
Cold Guns, by comparison, have almost no ongoing costs. They simply run on compressed air. With no moving parts to wear out and virtually no maintenance, they offer a predictable and low-cost long-term solution.
Every machining process is different, and choosing between a cold gun and coolant often comes down to the details of your setup. If you’d like help evaluating your application, reach out anytime.
Jordan Shouse, CCASS
Application Engineer / Sales Operations Engineer
