Public domain
Conversion. Farm implements to cargo winches. Hobbing five bull gears simultaneously for a plow tractor prior to the conversion of a Midwestern farm implement manufacturer. The machine has since been adapted to cutting gears for cargo winches for the Maritime Commission
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Credit lineConversion. Farm implements to cargo winches. Hobbing five bull gears simultaneously for a plow tractor prior to the conversion of a Midwestern farm implement manufacturer. The machine has since been . 1942-01-01. Richie, Robert Yarnall, United States. Office Of War Information. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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Conversion. Farm implements to cargo winches. Making a vernier caliper measurement of a tooth on a cargo winch gear in a converted Midwest farm implement plant. The hobbing machine used in this operation formerly cut bull gears for plow tractors
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