If you're going through bits at a high rate, maybe you are waiting too long to sharpen them. If I'm going to be doing a serious amount of drilling, I sharpen the bit before use with a small, fine cut 3 corner file & touch up frequently. Don't forget to sharpen the outside spur while you're at it.
I've been using the same 1" bit so long that I can't remember when I bought it. It is a Greenlee.
Few things are harder to put up with than the annoyance of a good example.
