Abstract
This is a second paper to give the results of a series of tests to face-mill a variety of metals with cutters of various materials. The work was sponsored by the War Production Board under the auspices of the Office of Production Research and Development, through the Manufacturing Engineering Committee of The American Society of Mechanical Engineers. A great deal of data was obtained which, as yet, has not been published. An extensive series of tool-life and power tests were made under controlled laboratory conditions, to evaluate the capacity of sintered-carbide, cast nonferrous metal, and high-speed-steel face-milling cutters when milling several classes of cast iron. The variables reported here consist of the following: Grade of cast iron, tool material, feed, depth, width of bar, number of teeth in cutter, and the cutting speed. The effect of each variable was evaluated by making tool-life tests at several speeds to obtain cutting-speed tool-life curves (VTn = C). All of these variables are finally summarized in a nomograph which shows the importance of each variable and predicts the tool life.
