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Some of the welding manuals I've say that a certain amount of undercut is
inevitable. Certainly in examining the fuselages of some factory aircraft
I have seen some shockingly large errors like this in the finished welds. On
many of my practice wleds, particularly on tubing clusters, an otherwise
perfect weld has a tiny bit of undercut. I am talking barely visible here,
only just able to catch the end of a rod, for instance. At a guess i'd say
no more than .02 inches, maybe a bit more. Is this an acceptable situation?
If anyone's interested, maybe I can post some pics of one on a wesite but I
do not think the undercut will show up on a pic, it's that little...
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Welding; How much undercut?
