weld fill in for re-drill

[Katahdin]

I've done it with a Mig welder so I could fit a M151 shackle mount to my Jeep TJ. It came out pretty well. I just filled in the hole using an aluminum plate for backing. The molten steel mig puddle doesn't stick to the aluminum.



Worked great. There's also a few youtube videos that cover this sort of thing.

I don't recall any problems drilling the new hole.

 

[Capricious]

Heli-coil?

 

[LD1]

I am also curious as to the application.

But never had any issues re-drilling or machining a mig or stick weld if just mild steel to start with.

A copper plate on the back of the hole and fill it in. Grind the top flush then re-drill.

If a drill is all you have, you MUST fill the hole completely. IF you have a mill. No need to completely close it off. Just a bead or two around the outside and mill it out.

 

[Scooby074]

As said above.. I just mig the hole full then grind, and redrill with a sharp bit. A copper, brass, aluminum etc pad behind the hole can help, but usually I just mig it up without it.

 

[oldtimer 66]

One other tidbit. It was mentioned in one of the other threads. Make sure the hole is oversize. You may want to make it even slightly larger. The method here is to drill only in the weld metal. If you are re-drilling partially in the parent material and partially in the weld material the drill bit will walk one way or the other. I have never had the weld material and the parent material match and have the same machining properties. As per another thread if you are going to mill the hole then don't worry about it. Later.

 

[arrow]

This was nothing critical. It just bothered me that it did not match the other side on the tractor bucket area. It was purely cosmetic and I have a peculiarity that if I do something wrong, I should pay for it by punishing myself with the hard way and do it right. I stupidly grabbed a bit that I thought was the same size as the other hole I drilled 2 days before. As it was going through about an inch of metal, it was time costuming to stand there with a 3/8" hand drill and I have a "patience" issue. When I went to tap the hole, the tap was just swimming in there. Could I have drilled another hole? Yes. . Was I carried away and angry with myself for being a dolt? Yes I was. I needed a fix that made the first mistake disappear. As I do not have a mig, it seems that the 6013 appears to be a suitable rod. Thanks to all for the tips. As it is an inch deep, I'll probably weld it in from both sides. I'll make the hole larger, torch it up tomorrow, stick the 6013 in there and close it up. Then I'll grind it down, punch it, then re drill.

 

[Big Barn]

This was nothing critical. It just bothered me that it did not match the other side on the tractor bucket area. It was purely cosmetic and I have a peculiarity that if I do something wrong, I should pay for it by punishing myself with the hard way and do it right. I stupidly grabbed a bit that I thought was the same size as the other hole I drilled 2 days before. As it was going through about an inch of metal, it was time costuming to stand there with a 3/8" hand drill and I have a "patience" issue. When I went to tap the hole, the tap was just swimming in there. Could I have drilled another hole? Yes. . Was I carried away and angry with myself for being a dolt? Yes I was. I needed a fix that made the first mistake disappear. As I do not have a mig, it seems that the 6013 appears to be a suitable rod. Thanks to all for the tips. As it is an inch deep, I'll probably weld it in from both sides. I'll make the hole larger, torch it up tomorrow, stick the 6013 in there and close it up. Then I'll grind it down, punch it, then re drill.

Haha. Quote 'a patience issue'. I'm stealing that one, Lou.

Terry

 

[AGRIMAN]

Heli-coil?

If its not to far oversized, that's what i would do.

 

[mikehaugen]

If this hole is going to be tapped, I think that is going to present bigger problems than drilling

 

[arrow]

If this hole is going to be tapped, I think that is going to present bigger problems than drilling

Oh great.... So I take it weld metal doesn't tap well?