Which cutting tip has only one preheat hole to prevent distortion in sheet metal?

The sheet metal cutting tip is designed with a single preheat hole specifically to minimize distortion when cutting thin materials like sheet metal. When metal is cut, the intense heat can cause warping or distortion, particularly in thinner gauges. By using a tip with a single preheat hole, the heat is concentrated more precisely at the cutting edge, leading to cleaner and more controlled cuts without significant heat-affected zones that would typically cause distortion.

In contrast, other cutting tips such as the rivet cutting tip or heavy-duty cutting tip often feature multiple preheat holes to accommodate the cutting of thicker materials or to increase the heat output, which is not necessary for thin sheet metal and can introduce more heat into the surrounding material. Therefore, the specific design of the sheet metal cutting tip makes it optimal for applications where preserving the integrity of the metal is crucial.