Simple drill guide

[Frank S]

I bought a Miller Bobcat welder for real cheap at an auction because it had 3 broken head bolts and several other missing parts.
To repair the broken bolts I first removed the head to have a look at possibly simply welding a washer and a nut on the to remove them. No such luck this meant I would have to drill them out.
So I found a piece to steel tubing that fit very tightly in the holes of the head Actually it was tight enough to require tapping in place with a hammer the inside diameter was small enough that the drill bit I needed to use would almost drill out the entire body of the bolts leaving a thin shell and the threads.
after drilling out the bolts all I had to do was use a small seal pick to break the remaining thread piece out
the Guide served to hold the bit centered as well as a depth gauge for my drill

[Paul Jones]

Frank S,
This looks like a winner. I will try this technique next time when drilling free hand or on the drill press. Thank you,
Paul

[C-Bag]

Good one Frank, you don need no stinking EDM!

Helps to have all kinds of scrap laying around, never know when it's going to save your bacon.