190x220x15 NBR AO/TC Double Lip Rotary Shaft Oil Seal

What is the 190x220x15 NBR AO/TC Rotary Shaft Oil Seal?

The 190x220x15 mm NBR AO/TC Double Lip Rotary Shaft Oil Seal is a high-quality radial shaft seal designed to retain lubricating oil or grease while preventing dust, dirt, moisture and other contaminants from entering rotating machinery.

The AO/TC profile features a primary sealing lip with a garter spring, ensuring constant contact pressure against the shaft for reliable sealing, and an auxiliary dust lip that protects the sealing area from external contamination. Its rubber-coated outer diameter provides excellent sealing between the housing and the seal while improving installation and reducing the risk of leakage.

Manufactured from NBR (Nitrile Butadiene Rubber), this oil seal offers excellent resistance to mineral oils, greases, hydraulic fluids and many petroleum-based lubricants, making it suitable for a wide range of industrial, agricultural and automotive applications.

Technical Specifications

Key Features

The 190x220x15 AO/TC Rotary Shaft Oil Seal offers:

• Double lip sealing design
• Spring-loaded primary sealing lip
• Auxiliary dust lip for contamination protection
• Rubber-coated outer diameter
• Excellent resistance to mineral oils and greases
• High wear resistance
• Low friction
• Reliable sealing performance
• Long service life
• Precision manufacturing for demanding applications

Typical Applications

This oil seal is widely used in:

• Industrial gearboxes
• Speed reducers
• Electric motors
• Pumps
• Hydraulic equipment
• Compressors
• Agricultural machinery
• Construction equipment
• Industrial machinery
• Conveyor systems
• Power transmission equipment
• Heavy-duty rotating machinery

AO/TC Profile

The AO/TC profile consists of:

• A spring-loaded primary sealing lip that retains lubricants inside the system.
• An auxiliary dust lip that prevents dirt, dust and moisture from reaching the primary sealing lip.
• A rubber-coated outer diameter that improves static sealing and housing retention.
• Internal metal reinforcement for dimensional stability and durability.

This profile is one of the most commonly used rotary shaft seal designs in industrial power transmission systems.

NBR Material Properties

NBR (Nitrile Butadiene Rubber) provides:

• Excellent resistance to mineral oils
• Excellent grease resistance
• Good resistance to hydraulic fluids
• High abrasion resistance
• Good mechanical strength
• Reliable long-term sealing performance
• Typical operating temperatures from approximately -40°C to +100°C, depending on the rubber compound

Why Choose a Double Lip Oil Seal?

Compared with single-lip designs, a double lip rotary shaft oil seal provides additional protection by preventing dust, dirt, water and other contaminants from reaching the primary sealing lip.

Benefits include:

• Improved equipment reliability
• Better bearing protection
• Reduced lubricant leakage
• Longer seal service life
• Lower maintenance costs

FAQ

What are the seal dimensions?

The oil seal dimensions are 190 × 220 × 15 mm.

What does AO/TC mean?

The AO/TC profile identifies a double lip rotary shaft oil seal featuring a spring-loaded primary sealing lip, an auxiliary dust lip and a rubber-coated outer diameter.

Is NBR suitable for oil applications?

Yes. NBR is widely used for sealing applications involving mineral oils, greases and many petroleum-based lubricants.

Where is this oil seal commonly used?

It is commonly installed in gearboxes, pumps, electric motors, hydraulic systems, agricultural machinery, industrial equipment and many other rotary shaft applications.

What is the purpose of the auxiliary dust lip?

The dust lip protects the primary sealing lip from dirt, dust, moisture and other contaminants, helping to extend the service life of both the seal and the bearing.

Frequently Asked Questions from Mechanics and Engineers

When should a double lip oil seal be selected?

A double lip oil seal should be used whenever equipment operates in dusty, dirty or humid environments requiring additional contamination protection.

What are the most common causes of oil seal failure?

• Incorrect installation
• Damaged shaft surface
• Dry installation
• Shaft misalignment
• Excessive shaft runout
• Contamination
• Excessive operating temperature
• Incorrect material selection

How can oil seal service life be extended?

Ensure the shaft has the correct surface finish, lubricate the sealing lip during installation, use the appropriate lubricant and select the correct sealing material for the operating conditions.