It employs a consumable carbon or graphite electrode to melt the material, which is then blown away by an air jet.
This process differs from plasma cutting operations because in air carbon cutting an open, unconstricted arc is used, and the arc operates separately from the air jet.
Air pressure for the jet usually varies from 60 to 100 psi (4-7 bar).
The carbon electrode can be worn away by oxidation due to heat buildup.
Metal removal is rapid, and when properly done, a smooth half-cylindrical cavity is created.