National Oil Seals

For over seven decades, National Oil Seals has been a trusted leader in the sealing industry, offering premium oil seals to enhance machinery performance and ensure reliability in sectors such as automotive, agriculture, and industrial applications. These seals are engineered to prevent lubricant leaks and protect equipment from contaminants like dust, moisture, and dirt. Made using advanced materials such as nitrile rubber (NBR), Viton, and PTFE, National Oil Seals can withstand harsh environments involving high temperatures, pressure, and chemicals. At Independence Seal Company, we provide prototypes and replacement seals for the National Oil Seals. Do you have a seal sample, drawing, or rough dimensions? Our experts will help you create a National Oil seal replacement.

National Oil Seals – Proven Quality, Trusted Performance

National® Oil Seals, a brand under the Timken umbrella, has been a trusted name in the industry for over 75 years. Established in 1942, National has consistently provided premium sealing solutions that meet or exceed original equipment specifications. Their commitment to innovation is evident through numerous product launches, such as the Red 37 Series oil bath seal in 1991 and the Dynamic Edge® technology upgrade in 2010. National’s engineers continually develop advanced sealing technologies for use with aftermarket and original equipment applications. They help ensure reliability and performance across a wide range of applications.

Features of National Oil Seals

National Oil Seals feature precision sealing designs and are extensively used across industries. These seals stand out from other competitor products due to the following reasons:

Available in single-lip, double-lip, and metal-cased designs, these seals offer the same reliability and protection against lubricant leaks and contamination.
They are also offered in internal, external, and axial-oriented designs.
These seals feature a spring for the thight of the oil seal, which helps prevent leakage.
These seals are available in various sizes and thicknesses.
National Oil Seals are durable, effective, and tailored to withstand the most demanding environments.

Popular National Oil Seals Models

We can provide the prototypes and seal replacements for the following models of National Oil seals.

Oil Seal National Model 35: This model ensures a static sealing ring and is widely used for splitting housings. Featuring light metal housing and high thermal expansion, this seal is also considered for high-pressure applications with a ring.
Oil Seal National Model 32: This oil seal model has a dust lip and features a metal housing with a rubber exterior and a support spring.
Oil Seal National Model 41: It features a metal casing outside and rubber inside. The spring inside the ring provides extra strength and the dust lip helps keep out all the dirt out.
Oil Seal National Model 45: This oil seal has no dust lip. It has a double metal casing and support spring.
Oil Seal National Model 47: This oil seal stands out with its metal exterior and rubber interior. It features a spring inside the ring for extra strength and support. There is also a dust lip on the oil seal, which keeps out the dirt.
Oil Seal National Model 48: This oil seal has no dust lip and comes in a metal casing. It also has a support spring.

Independence Seal Company – Precision Replacements for National Oil Seals

At Independence Seal, we provide high-quality replacement seals that match the performance of National oil seals. Our custom-engineered solutions ensure seamless fit, durability, and optimal protection for your machinery, keeping operations smooth and efficient. Whether you need a single seal or a bulk order, we deliver precision and reliability for any application. Reach out today to discover sealing options tailored specifically to your equipment’s needs. Let us help you keep things running without compromise.