The trend started about 10-15 years ago when marketing departments assumed more power in naming machines. Welding machines that once went by the names, say "Betamig 250's" and "Millermatic 210's" now carry amperage ratings that are higher than their actual output. For instance, a 90 amp MIG machine is touted as 135 amps MIG machine because theoretically, it can weld at 135 amps for about 10 seconds.
The impact of this shift on welders is that it makes it harder to determine the right machine for their welding projects. Newcomers to the welding industry, especially, may struggle to ascertain the machine they need for their amateur projects. The danger in that, of course, is that it exposes welders to various hazards and accidents that come with using the wrong welding equipment.
Amidst all of this, however, it is gratifying to note that one thing has remained constant - the components of the welding gun. These components remain unaltered, regardless of the naming gimmicks used by manufacturers. To name a few of the components, the gun consists of a contact tip, nozzle, gas diffuser, liner, and power cable.
The contact tip is the point of contact between the wire and the workpiece, it vents exhaust and protects the MIG gun from damage. The nozzle, on the other hand, protects the weld itself and ensures good gas coverage without a loss of gas flow. The gas diffuser is the component that diffuses gas into the nozzle, ensuring higher-quality welds.
The liner protects the wire from kinking, over-bending and helps to feed it into the contact tip. Finally, the power cable is responsible for delivering power to the welding gun itself. These components do not change, irrespective of whatever gimmick marketers employ., and are crucial to the success of a welding project.
In conclusion, while the numerical naming of welding machines can be confusing, the vital components of the MIG welding gun remain unaltered. It is essential for welders to pay attention to these components when selecting a welding machine, and not be overly swayed by a misleading number on product packaging. By doing this, welders can ensure a successful and safe project.