Summary of the Use of Tungsten Carbide Tipped Woodworking Tools in Regular Production

Summarizes the progress made in the application of carbide-tipped woodworking tools to production machining at the Singer Manufacturing Company, South Bend, Indiana. A description of the various applications of these tools along with the tool specifications found to be satisfactory are presented. Resharpening of carbide-tipped tools in their own plant was found to be cheaper than returning the tools to the manufacturer for sharpening. Factors that influence the performance of carbide cutting tools are: 1) Shaper knives must be fitted with one-piece carbide tips, 2) failure of a carbide tip to remain attached to the steel backing can be reduced to a negligible amount through proper brazing by the tool manufacturer before the tool is released for use in production 3) improper handling of the carbide–tipped tools by the set-up men can destroy any potential savings available in these tools, 4) the feed speed must never be low enough to cause overheating of the saw, 5) special applications require special tools and must be developed by trial at the present time, and 6) carbide tools cannot be justified in every instance and at times, such as the use of small router bits that are subject to varying loads, are not so efficient as high speed steel. A list of production machines equipped with carbide-tipped cutting tools at the Singer Manufacturing Plant is presented.

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