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SESK: Stuff Everyone Should Know · sesk.info/weld-tig-tungsten-point

A ground tungsten point should be how long compared with its diameter?

About two and a half times the diameter.

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  1. About the same as its diameter
  2. About 2.5 times its diameter ✔
  3. About 10 times its diameter

Why: A sharpened tungsten gives a focused arc. Miller says to grind it with a fine wheel used only for tungsten, so it stays uncontaminated.

Huh, didn't know that: Miller advises a 200 grit or finer wheel.

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References

Answer: About 2.5 times its diameter. A sharpened tungsten gives a focused arc. Miller says to grind it with a fine wheel used only for tungsten, so it stays uncontaminated.

  1. Guide to TIG Welding Basics (Miller) www.millerwelds.com/en-US/resources/knowledge-hub/tig-welding/how-to/guide-to-tig-welding-basics
    make the point roughly two and a half times as long as the diameter.
    Checked 2026-10-10.

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