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Insert the reamer into a MIG torch shroud and expand the teeth to grip the shroud from the inside. By rotating with teeth expanded, spatter is removed from the inside of shroud and from around tip to allow the shielding gas to flow more easily.
Straight answers to the questions people ask most when choosing and using MIG welding accessories and consumables.
Beyond the welder and torch, a few small items make a real difference: a pair of MIG pliers for cutting wire and removing nozzles and tips, a tool for cleaning spatter from the nozzle, anti-spatter, a torch stand, a gas flow tester, and spare tips and nozzles.Depending on your work you may also want wire lubricant pads, a spool adaptor, and a gas heater for carbon dioxide. None of them is essential on day one, but each saves time or prevents a common problem, so build up the kit as you find out what your work needs.
When carbon dioxide leaves the cylinder it expands and gets very cold, and at high flow rates or in long periods of welding this can freeze the regulator and reduce or stop the gas. A heater fitted between the cylinder and the regulator warms the gas and prevents this.It is mainly needed when welding with pure carbon dioxide at higher flows or for long stretches. For argon mixtures at normal flows it is not usually needed. Heaters run from an electrical supply, so follow the maker's instructions and keep them away from water.
Spatter builds up inside the nozzle and, if left, narrows the gas path, which disturbs the shielding gas and causes porosity. Clear it regularly using a reamer or the jaws of the MIG pliers, with the torch cool and the machine switched off.Avoid hammering the nozzle or scraping it with sharp tools that might scratch it, because scratches give spatter a place to stick. Using anti-spatter in moderation helps, and replacing a nozzle that is badly worn or damaged is better than cleaning it again and again.
Anti-spatter makes spatter easier to remove from the nozzle, tip and workpiece, and reduces the time spent on cleaning up. It is applied lightly to the nozzle or onto the surface near the joint.There are some downsides. Some products contain silicone, which can cause problems if the work is going to be painted or coated afterwards, and there are silicone-free types for that. Do not overdo it, and avoid getting it on the contact tip or in the wire path. Follow the maker's safety information.