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Need help with a sheared bolt

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joe francano

08-29-2002 12:45:52




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Hello,

Have a sheared off bolt in a case 580 CK 'b'. year is 72. Diesel engine. Have a 5/8" bolt sheared off at the line of a piece of 1" steel. Tried welding a nut to it. No luck. Drilled up the middle and then the easy out broke off in it. Tried drilling it some more. no luck. The easy out is too hard. I have since been heating it and trying to blow it out with acetylene. Seems I am 1/4 way through and the torch wont go any further. Any other help would be greatly appreciated.

Joe

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Alton

08-29-2002 18:44:22




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 Re: need help with a sheared bolt in reply to joe francano, 08-29-2002 12:45:52  
blowing with a acetylene oxygen torch will harden the metal and make it almost impossible to drill. If this is a blind hole you have blown a hole in. Chip all the slag out you can and blow some more a little at a time until you get it out. The slag won't cut so you have to chip it out a little at a time. The broken ez out doesn't make it any easier.



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Clay

08-31-2002 21:36:20




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 Re: Re: need help with a sheared bolt in reply to Alton, 08-29-2002 18:44:22  
Sounds like you are between a rock and a hard place. I would try a high speed burr. Cut away the old bolt until you begin to see the threads of the bolt and hole. Once you get this far, you may be able to use a punch to break the bolt away from the hole.
Good luck.



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RANDY

09-07-2002 12:25:20




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 Re: Re: Re: need help with a sheared bolt in reply to Clay, 08-31-2002 21:36:20  
Get a carbide drill bit to drill out the easy out. You might want to make a "sleeve" to help you guide the carbide bit -drill a hole in a piece of steel the dia. of the carbide bit and clamp it over the hole - lined up with your easy out. Drill down thru this hole into the easy out.Be careful and easy does it - the carbide bits are very brittle and will snap (break) if you bend them. good luck



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