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2007, 14 minutes The series "The Making". It follows the technology used to make everyday products, conveying the relationship between science and technology and the making of things. This time it's gears. Gears are used in many places around us, such as vehicles and home appliances. Strong steel is used as the material because a lot of force is applied to the teeth. The material is heat treated and then machined into gears using a tool with teeth called a hob. Visit the Science Channel website: http://sc-smn.jst.go.jp/ Award-winning Works Lifestyle Learning/Education Nagaoka Gear Works, Ltd.