Nomad and 0.396mm (1/64") endmill

[PhilG (Phil Gorsuch)]

This is not entirely apples to apples, but probably some gems to be dug out of here:

1/64 endmill in brass

Hello, I’m trying to machine some brass stamps. I have been having no problem until I needed a 1/64 square end mill. I’m breaking them like they are free. I even bought g-wizard to see if that would help. On that attempt this morning it broke about five seconds in. So I cut the values in half to see what would happen with my last one. Made it about a minute and done. Is this possible? In g-wizard it doesn’t like the 10000 rpm limit but says it should work. Thanks, Duane