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Old 04-21-2021, 10:00 AM
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heinke heinke is offline
MetalShaper of the Month Jan 2018
 
Join Date: Nov 2009
Location: Livermore, CA
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On the tip sizing part of your question, I use a #5 tip on .063 3003 with my Meco. With the smaller tips, I seem to be challenged in getting full penetration on the backside. I've found a larger tip with less gas pressure works better than a small tip with higher pressure. It's a delicate balance between enough heat for full penetration and not blowing the molten puddle through because the gas pressure is too high. I adjust my torch so there's no "whistle" from it when welding, so it's a soft flame. Thus the larger tip size to get the heat.
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