Evolving Beyond Engine Applications: Oil Seals and Shape Design Technology
Oil seals — one of NOK's core products — vary significantly in shape, materials and structure depending on what is being sealed, the size of the shaft they are mounted on, and the type of movement involved. NOK produces around 60,000 types of oil seals, most of which are specifically designed for particular applications. While oil seals are widely used in automobiles, those used for engines and those installed in drivetrain components require entirely different properties. Despite all being referred to as "oil seals," they are fundamentally distinct products. For example, oil seals used in hub bearings near the wheels have undergone their own unique evolution.
