NO MORE BROKEN EZ-OUTS
EZ-Outs are too easy to break and the work that it takes to remove a broken one is worse than removing the original broken bolt or stud. The very nature of the tapered bit can cause additional sidewall tension and does the opposite of loosening a bolt. I drill the broken bolt with a drill bit that is about .090” smaller than the base thread. Next I use Torx bits in place of an EZ-Out bit. Pick one that is slightly larger than your hole and drive it in. The broaching action of the star shaped bit driving into the bolt will loosen the threads and pull the bolt in away from the parent hole. Use the appropriate socket on the Torx and back the broken bolt from the hole. I shop for the cheapest Torx bits I can find and have found tool outlets where you can buy them in bulk. No more trips over to the EDM to remove EZ-outs.

Keith Hennen
Hennen Engine Parts & Machine,
Green Isle, MN
July, 2016