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A method of drill design that will produce low stress, functional diamond films on cobalt-cemented tungsten carbide twist drills.
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Description Amethod of drill design that will produce low stress, functional diamond films on cobalt-cemented tungsten carbide twist drills. This leads to a more durable diamond coating and longer lasting tungsten carbide twist drills. Technology Method of drill design that lowers the stress of diamond coating on twist drill. Decreases delamination of coating by reducing the amount of stress. Advantages Easy fabrication that utilizes geometry modification to reduce stress. Proven advantages through rigorous engineering analysis.