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Tungsten doesn’t come pre-ground, so you’ll need to create your tip. The general rule of thumb is to make the point roughly two and a half times the diameter and always grind with the grain using a clean abrasive. If you want to get technical, for currents under 20 amps grind the tip to about 20 degrees. For over 20 amps, grind tips to about 20 degrees and add a small flat spot to the tip. View Related Article
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