Abstract
Abstract In this paper the author tells of the origin of cemented tungsten carbide and the most satisfactory method for making it. Because of its hardness its use for wear-resisting tools is valuable, and particular emphasis is placed on its use for cutting tools. The physical properties of cemented tungsten carbide and its economic value as a cutting medium are discussed. Design and care of the tools are essential factors in successful application. Proper support for the cemented-tungsten-carbide tip and allowance for proper clearance angles are essentials of design. The tool set-up should be as rigid as possible, as chatter or vibration is detrimental to successful life. The critical speed at which the tool should run for a particular job should be determined, and the machine be operated below this. Grinding of the tool is important, and the author tells of proper grinding methods. Use of cemented tungsten carbide for cutting tools has resulted in increased machine speed, longer life per grind, reduced tool maintenance, less waste of material in setting up, and greater accuracy throughout a long run.
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