Doesn Anyone Know what These Are - Possibly Taps for Thread Cutting?

Postby greengrass » Wed May 21, 2014 10:21 pm

What are these which appear to be some sort of taps for thread cutting.
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Simply Build It

Postby proptech » Thu May 22, 2014 6:21 pm

Hi greengrass

They are stud extractors. A hole is drilled in the remains of a broken stud, the extractor inserted and turned anticlockwise with a tap wrench.
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Postby greengrass » Sun May 25, 2014 12:36 am

Thanks proptech I shall keep them in a safe place and note down what safe place so I don't go searching in the garage muttering 'where the hell did I put those &*$)**? extractors. My apologies for being late in thanking you. Greengrass
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Postby plumbbob » Mon Jun 02, 2014 3:06 pm


I have only ever once had a success with these. What happens is, it's far too easy to snap the extractor off leaving a hardened piece of steel that can't be drilled, stuck in the stud and it eventually takes far longer to sort that out than if you drilled the stud and re-tapped the hole in the first place!

They are not that strong, and unfortunately, there is no warning that it's about to fail. Just "snap" and then %&?@.
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