Broken Bolt

[BLDFW]

What's the best way to remove this broken bolt without damaging the threads?

Thanks for the assistance!

 

[cpubud]

Re: Broken Bolt

drill bit,easy out,and heat.

 

[robert graham]

Re: Broken Bolt

if that doesn't work then you can drill it out and re-tap it...hopefully the easy-out and heat may work. Good Luck!

 

[Utahboatnut]

Re: Broken Bolt

Soaking it for a few days with pb blaster or the like never hurts either.

 

[lowkee]

Re: Broken Bolt

I agree with cpubud. Additionally i would spray on some Pb blaster on it and let it soak.

An alternative method is to weld a nut to the end of it by laying the nut against the bolt and welding inside the nut. That essentially installs a new head on the bolt and you can use a normal impact gun to remove it. The weld has trhe benefit of removing rush from the bolt by means of electrolysis, which always helps.

 

[Les Robb]

Re: Broken Bolt

63 years and that's the first time I've heard about the weld. Fantastic, I wouldn't give you a high success rate with hole and ez out. Remember if you do that the drilled hole had better be dead center. A slip to the side and you'll destroy the thread. Only problem I could see with the welded nut would be too much heat too fast.

 

[Frank Acampora]

Re: Broken Bolt

If you can't weld, and, for example, the bolt is 1/4 inch, then reinstall the cover with all the other bolts. Tap in a 5/16 roll pin to act as a guide and drill the bolt out with a 3/16 bit. Minimal damage to the threads because the roll pin keeps the drill bit centered. Buy a PREMIUM cobalt steel drill bit (not the cheap cobalt brand)

 

[htv]

Re: Broken Bolt

Frank wins.