When drilling out a small stud, The center may not be where you think it is. One side of the broken stud might be a full thread and the other side might be the root of the thread. So you need to study it before you strike it with a center punch.
If you can find a reamer index at a flea market, you would be better off using the reamers for the finishing cuts near the wall of the stud. Reamers are good for .015 to .020 per cut.
You also have to be careful to drill straight. You can probably handle one axis but you might want someone else to sight the other axis as you drill.
Plan B is a fall back solution. That means you screwed up everything. In that case, you will have to drill and tap for Helicoils or similar insert.
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Today's Featured Article - What Oil Should I Use? - by Francis Robinson. I keep seein this question pop up over and over again in discussion groups all over the web. As with many things there are often several right answers and a few wrong ones. Some purist I'm sure will disagree to no end with what I will tell you but most of us out here in the real world don't really care do we ? Some of them only bring their noses down out of the air long enough to look down them anyway. If you are like me you are only doing this old tractor stuff because you enjoy it. You
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