stumbledin
+1y
The key to drill bits is to never use them on an air drill unless its variable speed and dont go too fast. If your drilling with a drill press, use the slowest speed and you will never burn them up. Also use a 5 to 10 second rule on when to add cutting or some other oil.
Next is the quality of drill bits. They use all kinds of catch words, titanium, carbide blah blah blah. this is the one thing you need to know about drill bits
HIGH SPEED STEEL, dont get high speed drill bits, high steel, HIGH SPEED STEEL is the best all around bits you can get.
I can make a bit last forever and I have never ever owned a bit sharpener.
so to sum it all up, just buy high speed steel and you wont go wrong