It makes it harder to push the wire through.”ĭamage to the gun inevitably results in bad welds. That can be restrictive to the feeding process. So it doesn’t take much for contaminants to enter the system at the drive roll end and get compacted in there. “The liner that the wire feeds through is not much bigger than the diameter of the wire itself. “Another concern is contaminants like dust, grease or metal shavings getting into the gun,” says Myers. While crushing incidents can damage a gun quickly, the general wear that results from repeated bending, flexing, and dragging over rough surfaces can be just as detrimental over time, he adds. “Maybe not to the point where it’s severed, but enough to prevent the wire from smoothly feeding through it and thus resulting in unsteady wire feeding.” “A piece of steel might fall on the gun or a forklift may run over it and crush part of it or deform part of it,” says Myers. Common threats are falling objects or heavy equipment running over the gun. Handling the gun for long hours has to be comfortable for the user.”īut even the most efficient gun is subject to damage on the construction site. It has to be lightweight and the cable must be flexible. “But you also have to hold the gun all day long, so you don’t want it to be too heavy. “You want a gun that’s rugged, because it has to hold up to being dragged around,” he says. It can become too hot to hold, or potentially start a fire.”Ī good gun also balances durability and comfort, Myers adds. It’s primarily wasted energy, but it’s also a safety issue if the gun overheats. And it also heats up if you have bad connections. “If you have a loose connection, you lose current and you lose efficiency. “From the wire feeder to the contact point, every time electricity flows from one conductor to another within the gun, you need a nice, tight connection,” says Myers. That efficient transfer of electricity is not only a defining factor in the welding operation, but also in welding safety. The wire is not energized until it gets to very end of the gun.” At that point, the wire touches the contact tip and becomes electrically charged. “So it’s transferring electricity all the way out to the contact tip. “The gun is basically a series of copper strands and tubes with an insulated outer jacket and an insulated hole or liner in the middle that the wire travels through,” says Myers. A welding gun designed for self-shielded flux-cored welding performs two important functions – cradling the wire coming from the wire feeder and extending the welding circuit out to the contact tip. You don’t have to haul the extra shielding gas tanks around, and you don’t need an additional gas line.”īut the self-shielded flux-cored welding process is only as efficient and productive as the gun the operator holds to perform the welding. You can weld in wind up to 30 miles per hour, and you still won’t get the contaminants that you can get when the wind blows away your external shielding gas. “One is just the reliability of the self-shielded process, even when there’s wind at the welding site. In an environment like this, the self-shielded flux-cored welding process is generally preferable to the gas-shielded process for two reasons, says Tom Myers, Senior Application Engineer for Lincoln Electric. Filled with dust, debris and heavy materials in every corner, and frequently exposed to the elements, the typical field welding site can be a challenging place for even the most robust welding operations. Wire Diameter Range: 0.035 - 0.120" (0.9 - 3.Straight Shooters: Ruggedness and Flexibility Define Reliable Flux-Cored Welding GunsĬonstruction sites and outside welding yards are no place for delicate or inefficient equipment.Select the Lincoln Electric K126 PRO series for your construction welding applications. The K126 PRO FCAW-SS guns feature replaceable liners, interchangeable back-ends, long life Magnum® PRO contact tips, improved heat-resistant gun tubes and better trigger lead protection. Lincoln K126 PRO Innershield® Flux Core MIG Guns
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