This tutorial explains how consumables, including stick electrodes and other filler rods, are classified and sold. Welders Universe is a welding resource with information, links and videos for students, DIY welders and businesses.
For some time I've toyed with the idea of building my own cnc router, or perhaps a printer. The idea, of having a tool which allows me to fabricate parts using a computer to control the process, is pretty compelling.
Gas cylinders are pressure receptacles used to store liquefied and compressed gases that are potentially hazardous. These cylinders are usually made with high quality steel that are molded into seamless spherical containers.