IWA 15.330 Wall thickness of curved container ends slide rule 1976 Germany

This dedicated slide rule chart was developed specially for calculation Dished ends and basket-arch ends (curved container ends) used in industrial and equipment construction. The main difference lies in their curvature depth and standardization with flanges using specific formulas. Specially developed for the Afflerbach Bödenpresserei (ends press) company from Puderbach Germany. It was produced by IWA with number 15.330 in 1976. It has the more modern and sturdy IWA design with plastic frame and cursor in said frame. It measures ca 32 cm or ca. 13 inches long and is in good shape with small signs of use and age only. Check the attached video on how to work your vintage man tool: slide rule operation instructions!