What is a NOK Oil Seal?

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An NOK oil seal plays a crucial role in safeguarding machinery by preventing the escape of oil, lubricants, water, and gases. Additionally, these seals effectively keep external debris—such as dust, dirt, and sand—at bay. Widely utilized across various industries, NOK oil seals boast a rich history of delivering consistent quality worldwide.

Understanding the Construction of NOK Oil Seals

NOK oil seals are crafted from synthetic rubber, forming the sealing lip. Many designs include a metal "spring" that enhances the seal's grip on the shaft, allowing for the effective containment of moving parts. According to my experience working in mechanical maintenance, using high-quality oil seals can significantly reduce leakage issues, proving crucial for machinery longevity.

For rotary applications, correctly installed NOK oil seals create a slight vacuum that helps prevent oil from escaping. In contrast, for reciprocating applications, the differential in oil film thickness during push-pull movements can lead to leakage. This highlights the importance of the oil seal’s contact pressure profile, which is tailored to achieve optimal oil film thickness.

Identifying NOK Oil Seals

Distinguishing an NOK oil seal is straightforward. You'll typically find a "NOK" marking on the side, along with specifications for the type and size.

Where to Purchase NOK Oil Seals

Oil-Seal-Stocks offers an extensive selection of NOK oil seals. Our knowledgeable sales team stands ready to assist you in finding the ideal oil seal from NOK or a suitable alternative. Click here to explore our comprehensive range of NOK oil seals.

Different Types of NOK Oil Seals

NOK Type TC

The NOK Type TC features a dust lip and is built with a metal housing, rubber exterior, and a metal spring. Click here to view our full range of this type.

NOK Type SC

Similar to the TC, the NOK Type SC excludes the dust lip but retains a metal housing, rubber exterior, and metal spring. Click here to view our full range of this type.

NOK Type TCN

The TCN is engineered for high pressure, featuring a metal housing and rubber exterior, a dust lip, and a metal support spring, capable of withstanding up to 10 bar pressure. Click here to view our full range of this type.

NOK Type SB

NOK Type SB lacks a dust lip, equipped with a metal housing and spring. Click here to view our full range of this type.

NOK Type TB

Like the SB, the TB includes a dust lip along with its metal housing and spring. Click here to view our full range of this type.

NOK Type TA

The TA model includes a dust lip and dual metal housing, complemented by a metal spring. Click here to view our full range of this type.

NOK Type SA

Identical to the TA model, the SA does not include a dust lip, featuring dual metal housing and a metal spring. Click here to view our full range of this type.

NOK Type DC

The DC type comprises two sealing lips and boasts support springs on both. It features a metal housing with a rubber exterior. Click here to view our full range of this type.

More About NOK Oil Seals

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NOK Type DB

Similar to the DC, the DB model does not feature a rubber exterior but retains the double sealing lip and support springs. Click here to view our full range of this type.

NOK Type VC

The VC variant is designed without a dust lip, consisting of steel housing and rubber exterior with no support spring. Click here to view our full range of this type.

NOK Type VB

Like the VC, the VB is devoid of a dust lip, featuring steel housing and a rubber exterior without support spring. Click here to view our full range of this type.

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