What is a negative consequence of using a coarse grinding stone on tungsten electrodes?

Using a coarse grinding stone on tungsten electrodes can lead to more tungsten breakage due to the stress and damage inflicted on the electrode while grinding. Coarse grinding stones remove material more aggressively, which can create micro-fractures in the tungsten. These fractures weaken the integrity of the electrode, making it more prone to breaking during use, especially under the high temperatures and stresses of the welding process. Ultimately, maintaining the condition of the tungsten electrode is critical for achieving a stable arc and optimal weld quality, which can be compromised if the electrode is damaged from improper grinding techniques.