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Plasma torch spares for one maker's cutters: how to match the right part, spot wear and fit it safely.
The electrode carries a small insert at its tip that burns away a little with every start. As it wears, a pit forms in the centre, and the cut quality usually falls. Misfires or a hesitant pilot arc can also point to a tired electrode.Look at the tip under good light. If a clear cavity has formed, or the manual shows a limit for pit depth, replace it. The permitted depth differs between torches, so use the figure in your manual rather than a rule of thumb. If the electrode has worn out because of the insert, the matching nozzle is usually changed at the same time.
Switch off first, then remove the old parts and wipe the inside and outside of the torch head with a clean, lint-free cloth. Check the seating faces and threads for dirt, burn marks or damage, and look for debris that the retaining cap can trap.Examine the O-rings for cracks, flattening or cuts and replace any that are damaged. Check the swirl ring holes for dirt, cracks or blockages. If you wash parts, use clean tap water, not water from a cutting table, as its contaminants can harm consumables. Make sure everything is dry and clean before assembly.
Yes. Moisture and oil in the air supply reach the torch and can significantly shorten consumable life, spoil cut quality and may damage the torch and power source. Condensation can form in air lines as temperatures change, and oil can find its way back from air tools on the same line.A good setup uses filtering and drying near the compressor, plus a further filter close to the cutter's air inlet. Drain traps regularly, change filter elements when the maker says so, and keep air lines short and direct. If parts wear far faster than expected, check the air supply before blaming the consumables.
A gouging nozzle is made for removing metal, such as taking out a weld or a defect, rather than cutting through the plate. It usually has a larger bore than a cutting nozzle, which gives a wider, softer arc, and the torch is held at a shallow angle so the metal is blown out as a groove.Cutting nozzles give a narrower, more focused arc to sever the plate. Many cutters have a gouging mode that adjusts the settings, so use it where the manual says. Current mainly affects how wide and deep the groove is. Do not swap the two types around; fit the parts your manual lists for each job.
