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Technology ArticleWellers also called soldering iron A soldering iron is a device for applying heat to melt solder for attaching two metal parts. A weller is composed of a heated metal tip and an insulated handle. Heating is often achieved electrically, by passing a current, supplied through an electrical cord or a battery, through a heating element. Another heating method includes combustion of a suitable gas, which can either be delivered through a tank mounted on the iron (flameless), or through an external flame. Some heat up and cool down in a few seconds, but others take minutes. For electrical work, wires are usually soldered to printed circuit boards, other wires, or small terminals. A low-power iron (15-30 Watts) is suitable for this work. In earlier days wires were frequently soldered to large chassis made of heavy metal, but this high-power requirement is now rare. Higher power is used for non-electrical metal-work. Small battery-operated or gas soldering irons are useful when there isn’t a convenient source of electricity. Some wellers have interchangeable tips for different types of work. Pyramid tips with a triangular flat face are useful for soldering sheet metal. Fine round or chisel tips are typically used for electronics work. Wikipedia Disclaimer Above information is from wikipedia and is freely distributed under the GNU license Also See: All Articles |