Miller maxstar 161 stl weak penetration

Ronnie Mcbride · 2025-04-08T20:17:00-04:00

Hi guys i am curious why my Miller Maxstar 161 STL has weak penetration on tig with 1/16-inch tig electrode at 15 CFH argon, welds look weak and shallow. Is there any solution?

This topic has 3 replies, 4 voices, and was last updated 8 months, 1 week ago by Gary Bryant.

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- April 8, 2025 at 8:17 pm #52870
  Participant
  Ronnie Mcbride
  Hi guys i am curious why my Miller Maxstar 161 STL has weak penetration on tig with 1/16-inch tig electrode at 15 CFH argon, welds look weak and shallow. Is there any solution?
- April 9, 2025 at 3:41 am #52872
  Keymaster
  Tyler Joseph
  Bump amps to 140 on your Miller Maxstar 161 STL, use 2% lanthanated tungsten, improves penetration.
- April 9, 2025 at 9:41 am #52873
  Participant
  Dennis Solomon
  Clean metal with alchohol before welding, contamination weakens penetration, set to 20 CFH argon on your Miller.
- April 9, 2025 at 4:43 pm #52874
  Participant
  Gary Bryant
  Check tungsten prep on your Miller Maxstar 161 STL, regrind to a point, use 130 amps.
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