Re: Hello Funderburk1

Posted by Janicholson on May 17, 2007 at 21:30:32 from (66.173.50.154):

In Reply to: Hello Funderburk1 posted by Tom Windsor on May 17, 2007 at 21:07:36:

Yes blowing a bolt out can happen. It is mostly a matter of heat transfer. Heating a bolt in a blind hole is not going to wirk well. If the casting is made such that the threaded hole is through the back into the air, drilling a hole about 1/2 the diameter of the bolt will allow the flame to travel the length of the bolt. cutting it must be done such that only the bolt is directly heated to any where near red heat. Then the oxygen lever is hit causing the steel of the bolt to burn. this heat (not the torch flame) continues the cutting process. Be sure to blow through the hole and not plug it up. If it gets plugged up, it will have slag inclusions that are hard to drill out. If it were mine, I would drill out the bolt with very careful alignment of the drill (jig/fixture) and centering. then keep using larger bits until I got to the tap drill size. then heat the remaining "springlike" piece of thread with the torch until it glows. Then pull them out with a needle nose and a dentil pick. JimN

Replies:

• Re: Hello Funderburk1 Tom Windsor 21:39:06 05/17/07 (1)
  • Re: Hello Funderburk1 Janicholson 21:48:05 05/17/07 (0)

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