Getting the Heat Right When Cutting Glass Tubes
If you’ve ever tried to cut glass tubes, you know the struggle. You need that perfect, sharp spike of heat to create a stress point—but if you overdo it, you’re just heating up the whole piece of glass and asking for trouble. That’s why we build our infrared lamps the way we do. We want to hit that tiny temperature window exactly, without cooking the rest of your workpiece. The Power Struggle We usually figure out the heater specs based on how much heat you actually need hitting the glass. If we go with high-wattage lamps at 230V or 400V, the heat ramps up fast. And speed matters. If the heat soaks in too slowly, the glass expands unevenly. Then you get cracks. It’s frustrating and wasteful. We make sure the lamp length matches your tube diameter so the heat stays right where the cut happens. Just a heads-up: if you want more power in a smaller space, you’ll need to make sure your cooling fans can handle the extra heat around the housing. Otherwise, things get too hot to handle. Quartz and Connections We use high-purity quartz glass because it can take the beating of constant heating and cooling without giving up. Some of our units have a special coating, too. It basically tells the energy, “Go to the glass tube, not the machine frame.” It stops you from wasting power on the metal around the lamp. As for the plugs, we stick with R7s or Sk15 connectors. Why? Because they actually stay put. They won’t rattle loose when your production line is humming at full speed. Plus, they’re a breeze to wire up and usually slide right into the sockets you already have. Killing the “Cold Spot” Here’s the thing: buying a lamp off a shelf is a bit of a gamble. Every shop is different. Your airflow is different. Your reflectors might be slightly off. A lamp that worked perfectly in a clean lab might burn out in a few weeks on your factory floor if the setup isn’t right. That’s why we like to come see your setup in person. We look for those annoying “cold spots” that cause jagged edges on your cuts. We’ll tweak the distance between the filament and the tube until it’s just right. It’s all about finding that sweet spot where you get an intense cut but your lamps still last a long time.