Affordable Metal CNC Machines | CNC Metal Engraving Machines ...
6. How hard metal can the CNC metal engraver can engrave? The CNC metal engraver is mainly used to engrave soft metals, such as aluminum, brass, iron, and other metals. If you want to engrave harder metals, such as quenched steel or stainless steel, with a Mohs hardness of about 7.0, you need a heavier bed and a more powerful spindle.