Public domain
Conversion. Farm implements to gun parts. Prior to conversion to the production of military equipment, a centerless grinder was used by a Midwest farm implement manufacturer for grinding bearing pins for bell cranks of harvesting machines. This machine is now used in the production of 37 mm. shells
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineConversion. Farm implements to gun parts. Prior to conversion to the production of military equipment, a centerless grinder was used by a Midwest farm implement manufacturer for grinding bearing pins . 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.