Oil Seal: Complete Guide to Shaft Seals and Rotary Seals

Identify oil seal types. Then evaluate applications and specifications for proper selection. Search reputable suppliers for oil seal availability and pricing.

Oil seals play an important role in preventing leakage and maintaining system integrity across various industrial applications. 

This article covers everything you need to know about oil seals. It also includes metric oil seals, TC seals, and rotary seals for different shaft configurations.

Let us help! We’ll find you the right oil seal and best price: 1-877-465-9108

Oil Seal Types and Their Essential Functions

Oil seals are used primarily to prevent oil or grease leakage in rotating equipment. These seals come in various configurations, with the most common being single lip and double lip designs. The seal’s primary function is to maintain lubricant within the system while keeping contaminants out.

Shaft Diameter and Size Considerations

When selecting an oil seal, the shaft diameter is the most critical dimension to consider. Metric oil seals typically range from 30 mm to larger sizes, with 40 mm being a common specification. The outer diameter and overall width are also crucial measurements for proper fitting.

Seal Lip Design and Materials

The sealing lip, often made from NBR (Nitrile Rubber), is the primary contact point with the rotating shaft. Material options include:

• NBR (Nitrile): Excellent for oil and grease applications
• FKM (Viton): High-performance option for extreme conditions
• EPDM: Suitable for specific chemical environments
• HNBR: Enhanced temperature resistance
• Silicone: Special temperature requirements

Gaskets and Grease Seals in Oil Seal Applications

In many systems, gaskets and grease seals work alongside oil seals to ensure full protection. Gaskets provide a static seal between two non-moving components, preventing leakage in stationary assemblies, while grease seals are specially engineered for high-speed, rotating shafts. These components are vital in applications where both oil and grease sealing are required to avoid system contamination or wear.

High-Performance Sealing Solutions

Modern oil seals feature various design elements for optimal performance:

• Metal case construction (carbon steel or stainless steel)
• Steel spring for consistent lip pressure (typically 10 PSI)
• O-ring secondary sealing
• TC (Track Contact) design for specific applications

Radial Oil Seal Technology

Radial oil seals are a specific type of seal designed to fit around a radial shaft. Their purpose is to prevent oil-based lubricants from escaping while protecting against external contaminants. The radial design enhances the seal’s contact pressure and durability, particularly in high-speed or high-pressure applications.

Shop by Brand and Material Options

Leading manufacturers like Garlock offer extensive catalogs including:

• Standard metric and inch sizes
• Custom sizes available upon request
• Various lip material options with different durometer ratings
• Rubber coated OD for secure fitting

Advanced Sealing Technology

Today’s rotary seals incorporate:

• Spring lip design for consistent contact
• Polyacrylate options for special applications
• Housing bore specifications for precise fitting
• Enhanced lip design for optimal lubrication

Part numbers typically indicate specifications such as:

• Shaft size
• OD (Outer diameter)
• Material code (CR for standard options)
• Lip configuration (with or without a spring)

Applications and Compatibility

Oil seals are crucial components in:

• Gearbox assemblies
• Hydraulic cylinders
• Industrial machinery
• Rotating equipment requiring 0.625 or similar clearances

The versatility of modern seals ensures compatibility with:

• Oil-based lubricants
• Various operating speeds
• Different housing configurations
• Multiple mounting arrangements

Why Seal Design Matters for Industrial Equipment

The effectiveness of an oil seal depends on its ability to adapt to its environment. Factors such as lip design, material hardness, and seal around tolerances are essential in preventing leakage and maintaining long-term performance. In specific cases, carbon steel or stainless steel construction enhances durability, while rubber-coated options provide added flexibility.

Custom Solutions and Sizing for Oil Seals

For specialized applications, custom size oil seals are available. These may include:

• Standard or custom radial shaft sizes
• Special configurations with enhanced lip design
• Solutions for systems requiring up to 10 PSI

Custom sizes are available upon request, ensuring a precise fit for unique machinery setups.

Where to Buy Oil Seals

At Industrial Gearbox Solutions, we want to ensure you get the right oil seal for your application. Before purchasing, we encourage you to call us first at 1-877-465-9108. Our team is ready to help confirm your shaft size, outer diameter, overall width, and material requirements to make sure you get exactly what you need.

Once you’re ready, we recommend Power Drive Systems, Inc. for purchasing high-quality oil seals. Visit their website: Oil Seals – Power Drive Systems, Inc. to explore their extensive selection. You’ll find options like TC seals, NBR seals, and seals specifically designed to prevent oil leaks. With a user-friendly platform, you can easily browse their catalog to find seals for rotating shafts in a variety of sizes and configurations.

If you have any questions, call us first to ensure you’re fully prepared before buying. Together, we’ll make sure your purchase is perfect for your application.

Contact Us for Your Oil Seal Needs

At Industrial Gearbox Solutions, we provide a wide range of oil seals, rotary shaft seals, and gaskets. Whether you need standard options or custom solutions, our team can help you find the right product for your application.

support@industrialgearboxsolutions.com
https://industrialgearboxsolutions.com/contact/
Industrial Gearbox Solutions
3590 Scheele Dr, Jackson, MI 49202
1-877-465-9108

Industrial Gearbox Solutions
Phone: 1-877-465-9108
industrialgearboxsolutions.com

FAQs

How can I prevent oil or grease leakage with the right oil seal?

Choosing the right oil seal is crucial to prevent oil or grease leakage. Ensure the grease seal matches your system’s shaft tolerance, bore size, and temperature range. Specifically designed seals in various styles are available to fit your needs and protect against dirt and wear.

What materials are metric oil seals made of?

Metric oil seals are typically made from durable materials like carbon steel and nitrile rubber. These products are available in a variety of styles to suit different temperature ranges and provide excellent resistance to ozone, abrasion, and dirt for lasting performance.

How do I measure dimensions for the right seal?

To find the right seal, accurately measure the shaft tolerance, bore size, and overall dimensions. Enter these specifications on the product page to compare styles and find options in stock. Many sizes are ready to add to your cart or request custom items.

Are seals available in several sizes for industrial applications?

Yes, seals come in several sizes, including metric oil seals, to fit various industrial applications. Use the search tool or contact a supplier like Hercules to explore options. You can sort by size, price, or style to find exactly what you need.

How do I ensure proper installation of a seal?

Proper installation requires checking the shaft tolerance, bore size, and dimensions. Ensure your seal is specifically designed for the application and fits tightly without gaps. Follow guidelines to maximize performance and prevent premature failure.

Where can I find seals to add to my cart?

Visit the product page, search by number or specifications, and use filters to sort a wide variety of seals. Most suppliers offer seals ready to add to your cart with detailed product information, including material, style, and dimensions.

Can I get assistance with questions about seals?

If you have questions, contact the supplier for support. Most providers, like Hercules, offer customer service to help you compare styles, measure dimensions, and choose the right seal for your application. Adding seals to your cart is simple with expert guidance.

What is the importance of the outer diameter when selecting a seal?

The outer diameter is critical to ensure a proper fit and prevent a leak. Use a size chart to match the lip and case dimensions to your system. Proper sizing helps protect rotating shafts and prevents corrosion over time.

How do I find the correct seal by part number?

You can browse a catalog or use a part number search tool to locate the exact seal. Ensure the seal fits the required shaft size, 30 mm, 40 mm, or other dimensions and is specifically designed to prevent oil and dirt intrusion.

What does NBR mean in seal materials?

NBR stands for nitrile rubber, a material specifically designed for oil-resistant applications. It is ideal for seals that interact with rotating shafts and are specifically designed to prevent oil leaks. Check the overall width and shaft size to ensure a perfect fit.

How are TC seals used in industrial applications?

TC seals are double-lip seals used for rotating shafts and are specifically designed to retain oil while excluding contaminants. Their lip and case design ensures durability and resistance to corrosion. Check the shaft size and mm dimensions for compatibility.