0559210021 - ESAB 30A Plasma Nozzle for PT-31 Torch (Mild Steel)

Technical Overview of the ESAB 30A Plasma Tip

The ESAB 0559210021 is a specialized plasma cutting tip (nozzle) engineered for use with the PT-31 plasma torch system, commonly found on ESAB HandyPlasma power sources. This component is critical for the constriction of the plasma arc, directly influencing the energy density and cutting velocity. Rated specifically for 30 Amperes, this tip features a precision-drilled orifice designed to maintain a stable, columnar arc when cutting mild steel substrates. The bore diameter is calibrated to balance gas flow velocity with arc current, preventing premature orifice erosion while ensuring sufficient cooling of the electrode and tip interior.

Manufactured from a high-grade tellurium-copper or similar conductive alloy, the tip exhibits excellent thermal conductivity, which is essential for dissipating the intense heat generated during the plasma process. Efficient heat transfer prevents the nozzle face from melting or deforming under the 30A load, thereby extending the service life of the consumable. The 'MS' designation indicates that the internal geometry and orifice shape are optimized for the viscosity and flow characteristics of molten mild steel, aiding in effective dross ejection and cleaner cut edges.

In the plasma cutting circuit, the nozzle serves to focus the ionized gas stream. As the pilot arc transfers to the workpiece, the nozzle constricts the main arc, increasing its temperature and velocity. Using a tip with the correct amperage rating is paramount; a 30A tip used at higher amperages will suffer immediate orifice failure, while use at significantly lower amperages may result in an unstable arc and poor cut quality. This specific SKU is an OEM part, ensuring that tolerances for thread pitch and concentricity align perfectly with the torch head and electrode, maintaining the necessary electrical isolation and gas dynamics required for safe and efficient operation.

Technicians and fabricators should inspect the tip orifice regularly for signs of out-of-roundness or keyholing, which indicate wear. Replacing the tip in conjunction with the electrode is recommended to maintain optimal system parameters and cut quality. This unit is supplied individually and is a direct replacement for the original equipment supplied with HandyPlasma 30A setups.