Believe it or not you can buy drill bits that will go right through that broken extractor. I bought a set of them at the San Diego Fairgrounds about a year ago. I watched the guy repeatedly drill through a file, all without any cooling fluid. Anyway, he also drilled right through taps, stainless steel, etc. Here's part of the secret of using these drill bits. You need to turn them at the highest possible speed. I have a drill press that can be belted up to 3,000 rpm. It goes right through the hardest material you can imagine. As I recall I paid about $90 for a set from 1/8 inch to 1/2 inch in 1/8-inch increments. Was well worth the price since I recently had to drill three alignment holes in a 16-inch diamond saw blade for my son's granite cutting saw. If you'd like more information I can get it for you. Problem in your case is that you'd have to get a really high speed drill motor in order to get proper speed on the bit. Also, the bit really smokes and screeches when you begin drilling but it soon starts cutting right through the material. One other thing, I did have to drill out a broken 1/4-20 tap I'd broken off in a piece of steel and the drill went through it almost like butter! Hard to believe but true.
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18 years ago