How should you grind a tungsten electrode for GTAW?

Grinding a tungsten electrode with the grind marks parallel to the length of the electrode is critical for effective Gas Tungsten Arc Welding (GTAW). Aligning the grind marks in this manner helps to ensure that the arc stability is optimized. When the tungsten is ground in a way that aligns the surface texture with the length of the electrode, it enhances the focusing of the arc onto the workpiece and promotes a stable and controlled arc. This is important for achieving high-quality welds, as a stable arc leads to improved heat input and penetration, which are essential for the integrity of the weld joint.

In contrast, grinding in other directions, such as across the width, in a circular motion, or diagonally, could create a less predictable arc behavior. These grinding techniques can result in uneven surfaces that may lead to arc instability and increased chances of erratic welding properties. Therefore, maintaining the grinding technique that produces parallel marks along the electrode length is key to effective and efficient GTAW.