Bearings

Flexible printed circuits (FPCs) are thin, light, and able to bend without breaking. FPCs are studied day to day to respond to an ever-increasing variety and growing complexity of electronic equipment.

The word “oil seal” is used to describe these products that seal oil. In addition to preventing fluids, such as lubricants and water, and gases used in mechanical products from leaking at their “gaps,” they also keep dust, dirt and sand particles from intruding from outside.Seals are an indispensable means for sealing machines in a variety of fields, including automobiles, airplanes, ships, train cars, construction machines, agricultural machines, petrochemical plants, and home appliances.The history of NOK oil seals is synonymous with the history of oil seals in Japan. The products we export worldwide deliver consistent quality which is founded on our unique “sealing theory.”

Seals are indispensable sealing devices used in automobiles, airplanes and other vehicles, construction machines, equipment at petrochemical plants, home appliances, and various other machines. NOK offers a wide variety of seal products of very high reliability, including oil seals, based on its constant and focused research on materials, workings, and design.

NOK CORPORATION is Japan’s first oil seal manufacturer. Our functional parts created through our advanced seal technologies, including oil seals and mechanical seals, are commonly used in the automotive industry and various other fields. With technologies and expertise that we have developed since our founding, we have grown to be the most reliable company in this field.

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NationalOilSeal

Oil seals are made by bake-adhesioning the synthetic rubber part that makes up the seal lip to a metal ring. The embedded “spring” provides just the right amount of hold on the shaft, making it possible to seal moving parts.

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These are used on automotive engines and geared motors primarily to prevent oil leaks at the ends of rotating shafts and the intrusion of dust particles from outside.

As stated in its Charter of Corporate Behavior, the NOK Group supports the development of the economy and society, and also operates its business in such a manner that all stakeholders, together with the NOK Group, can continue pursuing their dreams with pride.

Rubber and resin materials are common materials of seals, which are NOK’s flagship products. It is necessary to select an appropriate material for each seal after careful consideration of its purposes and use environment.A variety of rubber and resin materials used for seals are described below.