Rotary Shaft Seal 11x19x5 NBR TC - Double Lip Oil Seal

Compact rotary sealing for precision applications

High durability and resistance to oils and grease

Main description

The Rotary Shaft Seal 11x19x5 NBR TC Double Lip is a compact oil seal engineered for precise and reliable rotary shaft sealing in small mechanical assemblies and space-restricted industrial applications. Its primary function is to retain lubricants such as oils and greases while preventing external contaminants from entering the sealing interface.

This double lip oil seal (TC) features a spring-loaded primary sealing lip that maintains consistent radial contact with the shaft, ensuring stable sealing over time. A secondary dust lip provides additional protection against dirt, moisture, and fine particles. Compared to a single lip oil seal (SC), the TC design delivers improved contamination resistance and longer service life, especially in environments with frequent start-stop cycles or airborne debris.

Manufactured from NBR (nitrile butadiene rubber), the seal offers excellent resistance to oils and grease, fuels, and common technical fluids. NBR is widely used in technical seals due to its elasticity, abrasion resistance, and dimensional stability. These properties contribute to high durability, reduced leakage risk, and consistent performance during continuous operation. A reinforced metal case ensures secure press-fit mounting and accurate alignment of the sealing lips with the shaft.

With dimensions of 11x19x5 mm, this shaft sealing ring is ideal for compact mechanisms such as small motors, auxiliary drives, precision gear units, and miniature assemblies. It functions effectively as a rotary seal, engine seal, and shaft seal within hydraulic and automotive seals segments where space efficiency and reliability are critical. Consistent quality and repeatable performance are associated with the GRN range of sealing solutions.

FAQ - frequently asked questions

What is the difference between single lip and double lip oil seals?
A double lip oil seal includes an additional dust lip that enhances protection against contamination and extends service life compared to a single lip seal.

Is NBR suitable for oil and grease applications?
Yes, NBR provides very good resistance to mineral oils, greases, fuels, and standard technical fluids.

How do I select the correct rotary shaft seal size?
Match the inner diameter to the shaft (11 mm), the outer diameter to the housing (19 mm), and ensure the width fits the installation space (5 mm).

Where are small rotary shaft seals commonly used?
In precision mechanisms, small electric motors, auxiliary drives, and compact industrial equipment.

Is this oil seal suitable for continuous operation?
Yes, it is designed for long-term use under stable operating conditions in industrial environments.