Home › Blog › Used Machines For Sale › From Factory Floor to Your Workshop: Evaluating a Pre-Owned, Used, Secondhand, Surplus CNC Machine Before Purchase LINCOLN ELECTRIC Sub Arc Welder made in USA When evaluating a pre-owned, used, second-hand, surplus CNC machine or a Lincoln Electric Submerged Arc (Sub Arc) Welder made in USA before purchase, it’s crucial to assess both general condition and technical capability to avoid costly surprises after installation in your workshop....