An oil seal normally consists of three basic components: the sealing element, the metal case and the spring. The purpose of the sealing element is to stop the fluid from leaking between the shaft and housing. The metal case will give rigidity and strength to the seal while it is being held in the bore or recessed groove. The spring will help make the sealing element more effective. All materials must be selected depending on the environment in which the oil seal will function.
NOK is Japan’s first oil seal manufacturer. Their oil seals and o-rings are used not only in the automotive industry, but also in a wide variety of other industries. Starting from the field of oil seals, NOK has been incorporating cutting-edge technology into the development of all their products.