What is typically used to point the end of a tungsten electrode?

The correct method for pointing the end of a tungsten electrode in Gas Tungsten Arc Welding (GTAW) is through the use of a grinder. This approach allows for precise shaping of the electrode tip which is crucial for achieving optimal arc stability, controlling the heat input, and ensuring a focused welding arc.

Using a grinder offers the ability to create a sharp point or a specific angle on the tungsten, tailored to the welding process and materials being used. This precision is important as it directly affects the quality of the arc produced during the welding operation.

While a lathe can be used in certain advanced workshops for shaping materials, it is not commonly employed for tungsten electrodes due to the precision required, making it less practical than a grinder. A cleaning compound does not serve the function of sharpening or pointing the electrode; instead, it is utilized to clean the tungsten or base metals prior to welding. A heat source might be used to modify the electrode under certain conditions but is not standard practice for pointing tungsten electrodes.

By using a grinder, welders ensure that the electrode has the correct geometry to produce a stable, controllable arc, essential for high-quality welding.