It's a slap in the face also to those poor graduate nurses expected to work for pittance while those at the
top rake it in.
What it is: A crater becomes worn into the
top rake face of the insert.
That combination enables us to do things with the
top rake of an insert that we weren't able to do years ago."
In the case of negative rake tooling, the normal carbide tool geometry of -5 deg top and side rake may be changed very advantageously to -5 deg
top rake -10 deg side rake for materials under 45 Rc hardness.