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Tungsten preparation AC Welding
To obtain full current capacity from a pure or zirconiated tungsten electrode when used with AC current output the
electrode is not ground to a point. The welding during positive polarity melts the point of the tungsten that becomes


balled tip
Safety with tungsten electrodes
Tungsten welding electrodes should never be manually ground on an abrasive belt or wheel (particularly silicone
carbide). Always use diamond wheels when grinding and cutting tungstens. The risk of injury when hand (manually)
grinding a very hard brittle material like tungsten is quite high. It is important to always follow standard safety guide-
lines when operating high speed grinding equipment.










Arc shape from balled
tungsten AC welding
Arc shape from ground
pointed tungsten DC
welding
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