I want to engrave brass with my machine. It is rigid enough to mill brass (I have several times). But now I want to engrave some brass, I used an old wood engraving bit I had and the line was a little wiggly and the bit dulled really fast. But I'm not surprised, it was an old bit made for hardwoods.
So I'm looking for suggestions for a bit and for speeds and settings. I'm looking to make fine lines like on a ruler. It just has to be deep enough to read. I tried .003 inch but I think .001 would be fine. I want to rub some paint on it and then polish the brass leaving the lines behind.
My machine's speed is 12000rpm to 18000rpm.
So what would you recommend for a bit, and feed rate?