Welders are used to fuse metal parts together by applying an arc of electricity to the metal. When arc is applied to the metal material and generates heat it melts it creating a molecular bond with the other material. As it cools, the metals fuse together creating a strong solid weld or connection. There are multiple types of welding processes and welding machines. The three common welding processes include MIG, TIG, and stick welding. These can be utilized both by hand or by robotic arm. We sell used welders from such companies as Miller, Lincoln, and ESAB.