Electrodes for gas- and liquid-cooled plasma torches

An electrode for a gas-cooled plasma cutting torch comprising:

• an elongate electrode body with an open end and with a closed end which define a longitudinal axis L, and
• an emission insert in said closed end, wherein a cavity extends in said electrode body from said open end of said electrode body towards said closed end, and said cavity is fluidically connected via at least one opening in a wall of said electrode body or in a front solid portion of said closed end to a radial outer side, in relation to said longitudinal axis L, of said electrode body;
• wherein said cavity has a first cylindrical portion with straight parallel sides and a circular cross section having a first diameter D and has a second cylindrical portion with straight parallel sides and a circular cross section having a second diameter D wherein said first cylindrical portion is situated closer to said closed end than said second cylindrical portion, and said first diameter D is smaller than said second diameter D;
• wherein said radial outer surface, in relation to said longitudinal axis L, of said electrode body has—proceeding from said closed end—a substantially cylindrical first portion and a second portion which adjoins said first portion, wherein said second portion has, per unit of length along said longitudinal axis L, a larger surface area than said first portion and has a thread or at least one spiral-shaped groove.