Drilling it out has only one real important component. Getting the hole centered. If it is not centered all other options become way more difficult. Use the chamfer on the casting, or factor in the twisted off helical thread into locating the drill hole (complicated with weld and slag!) If the hole is intended to be symmetrical with other holes measure and be sure of the drill location. A diamond bit in a dremel can do wonders to get at fresh bolt and centered in the threads. Even if it ruins the existing threads using a Thread Cert insert (not Helicoil) will make it new. Jim
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Today's Featured Article - Old Time Threshing - by Anthony West. A lovely harvest evening late September 1947, I was a school boy, like all school boys I loved harvest time. The golden corn ripens well and early, the stoking, stacking,.... the drawing in with the tractors and trailers and a few buck rakes thrown in, and possibly a heavy horse. It would be a great day for the collies and the terrier dogs, rats and mice would be at the bottom of the stacks so the dogs, would have a busy time hunting and killing, all the corn was gathered and ricked in what we c
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