This is probably a question for the Bicycle Mechanics forum but 99% of the time I read Classic & Vintage so here is the problem/questions:
I recently started rebuilding a 1975 Holdsworth and in taking it apart I find that the chainwheel side BB bearing race has been tack brazed to the frame. Why I don't know, but I suspect that perhaps someone earlier had stripped the threads and the tack weld was a way to keep the race in place.
My questions are: Should I file the tack off and remove the race? Can the threads be repaired? Leave well-enough alone? Your comments, suggestions, and recommendations will be appreciated. Thanks.
Skip Magnuson
Spokane, WA