MochetVelo Posted August 18, 2013 Share Posted August 18, 2013 I found this site with instructions for removing a broken bolt or stud. Looks like a good method to me:How to get that broken head bolt outPhil Link to comment Share on other sites More sharing options...
keiser31 Posted August 18, 2013 Share Posted August 18, 2013 EXCELLENT! Thanks for posting. Link to comment Share on other sites More sharing options...
Ben Bruce aka First Born Posted August 19, 2013 Share Posted August 19, 2013 EXCELLENT! Thanks for posting. WHAT JOHN SAID!!! Ben Link to comment Share on other sites More sharing options...
Guest Pete Morris Posted February 16, 2014 Share Posted February 16, 2014 Great answer but what if the bolt was flush with the surface ?? Link to comment Share on other sites More sharing options...
ojh Posted February 16, 2014 Share Posted February 16, 2014 I also melt beeswax down into the threads before welding. You'll either get it out easily or find out why it was broken to begin with.I TIG weld, if it is flush or even down a little you can sitll get to it welding from center outwards. Link to comment Share on other sites More sharing options...
Guest Pete Morris Posted February 16, 2014 Share Posted February 16, 2014 I also melt beeswax down into the threads before welding. You'll either get it out easily or find out why it was broken to begin with.I TIG weld, if it is flush or even down a little you can sitll get to it welding from center outwards.Good idea Link to comment Share on other sites More sharing options...
Larry Schramm Posted February 16, 2014 Share Posted February 16, 2014 I have seen a similar technique where you lay the washer down, the nut on top and then weld in the center of the nut to the broken stud. Link to comment Share on other sites More sharing options...
Bhigdog Posted February 16, 2014 Share Posted February 16, 2014 It's also best to bead blast or sand any zinc plating off before welding (most hardware store nuts/washers are zinc plated). Besides the zinc degrading the welding process vaporized zinc is toxic.............Bob Link to comment Share on other sites More sharing options...
Guest frazer51 Posted February 17, 2014 Share Posted February 17, 2014 Now if the bolt is broken a thread or 2 into the hole you will need to drill. First punch a mark as close to the center of the broken bolt as possible. Then take a small drill bit , about 1/8 and with a hand held electric drill start drilling. Keep in mind that you may need to angle the drilling to help keep it in the center. You might try to drill through the broken stud but it is not necessary. Now the hard part, you need to have some left hand drill bit in your collection of drill bit. I usually find these at yard sales or even flea markets. You might even try at a hardware store, good luck. You should start with a bit slightly larger than the 1/8 starter bit. After each time you slowly drill increase the size of you left hand drill bit and if luck is on your side a some point the bit will grab and actually screw the remains of the broken stud out. In any case don't run your drills at high speed, some bolts are grade 8 and will work harden making it difficult to penetrate the surface. The same thing will happen after a stud has a welded surface. I have been involved with these kind of things all my working life Link to comment Share on other sites More sharing options...
Luv2Wrench Posted February 21, 2014 Share Posted February 21, 2014 Thanks for posting. I've done this before but without the washer. Adding the washer would have made it easier to weld the nut on.I've also had to drill them out and I've found that frazer51's technique of gradually increasing diameter left-hand drill bits works a good bit of the time. Link to comment Share on other sites More sharing options...
HarryJ Posted February 25, 2014 Share Posted February 25, 2014 WOW!!!!!!!!!!! I'll remember that one! Link to comment Share on other sites More sharing options...
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