"RBnDFW" wrote in message
...
A friend is coming over tomorrow night so we can mill some BMW calipers for
his Porsche. Now, I'm no machinist, I guess I'm more of a machine
collector. I just don't want to mess up the calipers, and I'd also like to
not look like a klutz G

So, we need to mill .125" off the mounting ears on these iron calipers.
I'm guess these are some sort of cast steel.
I'll be using most likely a Enco Mill-drill, possibly a Burke MVN if I can
get it wired.
I have a 1.125 indexible face mill, with two triangular carbide inserts.

What speed should I run it at, and what depth of cut?

They most likely will be aluminum calipers if for a performance model.