Drill bit broke in hole..Now what?

[derwood]

when welding onto bolts that are broken off down in the hole I have used paper straws or a rolled up piece of paper as a rod guide so the rod doesn't touch the sides of the hole. then just weld your way back up the hole, let the paper burn.
For some reason , the weld doesn't stick to the sides of the hole, even in steel.

[chuck hahn]

The weld wont stick to the aluminum case either..just worried about melting the threads.

[Planecrazy]

When welding onto bolts that are broken off down in the hole I have used paper straws or a rolled up piece of paper as a rod guide so the rod doesn't touch the sides of the hole. then just weld your way back up the hole, let the paper burn.
For some reason , the weld doesn't stick to the sides of the hole, even in steel.

Clever idea ... I like that! Bet you could build up the weld enough with the MIG to grab it with a pliers and get the broken bit out!

Watching with interest to see if this works!

Regards,

[chuck hahn]

WSelding onto it will heat the crap out of it too...which is good to crack the bonding oxidation. I will try it probably Tuesday if i get the day off.