Somehow I managed to strip the 3/8-16 threads in my Deardorff V8 bed plate. I removed the plate and it's an aluminum casting from the 1950's most likely. The Cochrans at Deardorff offered to sell a new replacement plate for $125. But I managed a better option with help from my machine shop friend (see the LF October Portraits thread). We discussed a fix and I asked for a pressed in knurled insert. He machined a steel insert and pressed it in beautifully. Here are pictures of his work. The steel insert will be near impossible to strip and the knurling will prevent rotation, which is a vital feature. I installed the repaired plate today. Note to anyone removing and replacing a bed plate. Before installing the #2 screws, rotate the plate to each of 4 circular positions and check for best alignment of the previous screw holes. Slight hole tolerances will cause some rotational positions to be off. You will see when all holes line up as they should.
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