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Old 11-08-12, 09:28 PM   #8
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Join Date: Feb 2012
Location: The Netherlands
Posts: 823

Originally Posted by Windrush View Post
At work we used to have an extractor set made by Blue Point (part of Snap On), they were parallel but with flutes that cut a groove into the stud etc and therefore didn't expand it. The set came with drilling guides as well so that drilling dead centre wasn't a problem, never had a failure with it BUT it must have been a very expensive set to buy!

These are the best.
Left hand drill bits are a joke. Once the bolt is so stuck that it breaks off in the frist place, you can forget using a left hand drill. They invariably break and then you are worse off, because they are virtually impossible to drill out.

If the peace of bolt is not really stuck, the easiest way is to use a welding apparatus to stick a rod on the bolt end.

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