Our ring cutters have carbide blades, not much use on carbide rings. Just how do you crack a carbide ring without injuring the finger? This is a real question because it is only a matter of time before I will have to do it.
Jewelers' saws have industrial diamond blades.
Just how do you crack a carbide ring without injuring the finger?
A vise has been used in some cases. Cracking is apparently more dangerous for the eyes than the finger. I have no direct firsthand knowledge of the vise technique.