Abstract
After describing briefly the three methods of making copper powder: (1) by electrolysis, (2) by reduction of the oxide, and (3) by atomization, results are reported on the effect of particle size and shape of copper powders. The maintenance of close specifications in copper powders has required years of patient research and development. Then follows a description of the production of porous bearings; tungsten‐copper electrode tips; and steel‐backed copper‐base bearings. The products are used for bearings, motor brushes, grinding wheels, clutch facings, etc. Tables of physical properties of finished parts are appended.