What role do the preheat holes play in cutting tips?

The preheat holes in cutting tips serve a critical function in the oxyfuel cutting process. Their primary role is to assist in both heating the metal and preventing distortion during the cutting operation. The preheat holes allow a controlled amount of oxygen and fuel gas to mix and burn, creating a flame that heats the edges of the metal before the actual cutting occurs.

This preheating is essential because it raises the temperature of the metal near the cut line, making it easier to oxidize and cut through. By providing an even and adequate heating zone, these holes help to prevent thermal shock and distortion that can occur if the metal is heated too quickly or unevenly. By managing the preheating process, the cutting quality improves, and the chances of warping or creating irregular cuts are minimized. This understanding of the preheat holes underscores their importance in achieving precision and quality in oxyfuel cutting practices.