Abstract: A three-part front-end assembly for a plasma arc cutting torch utilizing a single inlet gas is disclosed. The front-end assembly includes (1) an electrode having an integral, hollow, elongated, interior cooling tube, (2) a tip element with integral swirl ring, and (3) a nozzle. The electrode having an integral, hollow, interior cooling tube stacks upon and nests in the tip element with integral swirl ring. Both of these elements then nest in the nozzle forming the stack configuration of this three part, front end assembly. The invention also includes as a separate element, an electrode having an integral, hollow, elongated, interior cooling tube. Another separate element of this invention is the tip element with integral swirl ring.

Abstract: A connector assembly includes first and second connectors which may be coupled by advancing a connector post on the first connector into a corresponding recess on the second connector. The assembly may then be fully engaged by 180.degree. rotation of one of the connectors about a longitudinal axis. Indicia on the connectors enable an operator to quickly ascertain whether the assembly is in engaged or disengaged position.