How to remove broken tap drill or extractor

Question

If you have a broken tap, drill or extractor commonly called an "easy-out", the only to remove it is by spark eroding or edm.

Find a local engineering firm or engine re-conditioner who is willing to undertake such work which is not cheap, but is the only effective way.

Forget other recommendations, they usually create a greater problem.

See www. sparkeroding.co.uk for more information or www. brokentap.blogspot.com

Answer 1

You can also use a special tap  extractor.

another ingenious method chemically dissolved pare of the tap to loosen it. (see link)

At my last job we had a welder who was tallented enough to be able to weld a smaller stud to the tap.   THe metal  heated from the welding  and the tap was suddenly cooled with a can of penetrating oil. The tap would easily be backed out.

And if you really want you can build your own EDM (http://www.lindsaybks.com/bks9/edm/index... Lindsey Publications has other "How to" publications as well