An O ring is a type of gaskets with an O-shaped (round) cross section, which is seated in a groove and compressed appropriately to prevent the leakage of various fluids, including oil, water, air and gas. Utilizing synthetic rubber materials suitable for various purposes, we offer O rings that withstand extended periods of use and use under harsh conditions.

Bearingpreload spring

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.

Bearingpreload tool

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.

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.

Bearingpreload calculator

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.

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.

Bearingpreload calculator by Timken

An O ring is a type of gaskets with an O-shaped cross section, preventing leakage of fluids and dust. We offer a variety of rubber materials suitable for various use conditions.