SBT is a leading supplier of high performance oil seals, rotary shaft seals and hydraulic and pneumatic seals.

SBT has 1.4 million Oil Seals / Rotary Shaft Seals in stock. We also have the ability to supply special sizes and materials to meet your specifications.

Our company has earned a strong reputation for delivering exceptional manufacturing solutions to meet the demanding needs of our valued customers. We pride ourselves on exceeding customer expectations by offering high-performance gaskets and sealing products, competitive pricing, on-time delivery, and outstanding customer service. At SBT, our primary goal is to consistently surpass your expectations and fulfill all your blueprint specifications and tolerance requirements.

Specializing in both metric and standard measurements, SBT. offers a wide range of sealing products for various industries and applications. Our expertise lies in custom Oil Seals, Rotary Shaft Seals, Grease Seals, Wiper Seals, End Cap VK-HP Seals, U-Packing Seals. These products play a crucial role in separating and protecting components within mechanical equipment.

Oil seals, also known as shaft seals, radial oil seals, or lip seals, are designed to create barriers between different sections of machinery, preventing the leakage of lubricants and contaminants. We specialize in producing high-quality oil seals that meet the specific requirements of your applications.

At SBT, we are dedicated to providing you with the highest quality sealing solutions. Trust us to deliver excellence in both product performance and customer service.

Oil Seal / Rotary Shaft Seal Materials

Oil seals play a crucial role in maintaining the integrity of rotating shafts by containing oil-based lubricants within axles, engines, and other machinery. They prevent leaks and ensure the smooth operation of various components. Similarly, grease seals are specifically designed for sealing thicker grease lubricants in rotary shaft applications.

In simple terms, an oil seal acts as a multifunctional barrier with four primary purposes: retaining lubricants or liquids, excluding contaminants, separating fluids, and confining pressure. These seals are vital for keeping machinery running smoothly and efficiently. SBT offers a comprehensive range of oil seals suitable for sealing hydraulic fluids in diverse applications, including pumps, automotive systems, and cylinder manufacturing.

At SBT, we provide rotary oil seals and shaft seals in various styles, sizes, and materials, ensuring a perfect fit for your specific requirements. Our fluid sealing products are available in a wide selection of rubber polymers such as Nitrile (NBR), Viton®, Fluorocarbon (FKM), Silicone (VMQ), Neoprene®, Chloroprene (CR), Ethylene Propylene (EPDM), Polyacrylic (ACM), Styrene Butadiene Rubber (SBR), Fluorosilicone (FVMQ), Polyurethane (AU/EU), Hydrogenated Nitrile (HNBR), and Methyl Vinyl Silicone (MVQ).

To guarantee the highest quality, our oil seals are manufactured using top-grade springs and cases made from carbon steel, stainless steel, or FDA-approved stainless steel. All products adhere to ASTM D2000 standards, ensuring reliability and performance. SBT is well-equipped to supply customized oil and rotary shaft seals based on your OEM drawings and specifications, meeting your unique needs with precision and expertise.

Oil Seal Common Styles

If you are unsure about the specific oil seal style you require, SBT offers a solution. You can send us an actual sample of your existing seal, and we will utilize reverse engineering techniques to accurately replicate the seal for you. Our goal is to provide you with a cost-effective alternative to brand name seals while ensuring premium quality. By choosing our services, you can experience significant savings without compromising on performance.

Among the most commonly used oil seal styles are TC, SC, TA, SA, TB, SB, and VC. It's worth noting that oil seal types TA, SA, TB, and SB have bare steel on their outer diameter (OD) widths. At SBT, we offer various processing options for the OD widths of these seals. You can choose from ground OD, highly polished bright steel, coated OD, or painted with a rubber coating to fill in small cracks in the OD housing. On the other hand, the remaining common seal types have OD widths that are covered with rubber.

By leveraging our expertise and capabilities, SBT ensures that you receive the ideal oil seal style for your specific requirements. Our commitment to quality and affordability sets us apart as a reliable provider of premium sealing solutions.

Oil Seal / Shaft Seal Designs

Oil Seal / Shaft Seal Styles

1. Radial Lip Seal: This is the most common and widely used style of oil seal. It features a flexible lip that makes contact with the rotating shaft, creating a barrier to prevent oil leakage.

2. Single Lip Seal: As the name suggests, this style has a single lip that provides sealing action against the shaft. It is suitable for applications with moderate sealing requirements.

3. Double Lip Seal: This style has two lips, which enhance the sealing performance by providing an extra layer of protection against oil leakage. The inner lip faces the fluid or oil being sealed, while the outer lip acts as a dust and dirt exclusion seal.

4. V-Ring Seal: Also known as V-Seals, these seals have a V-shaped profile that fits over the shaft. They provide effective sealing even in dynamic applications with significant axial movement.

5. Cassette Seal: This style consists of multiple sealing elements arranged in a cartridge-like assembly. It offers enhanced sealing performance and can handle high-pressure applications.

6. Spring-Loaded Seal: These seals feature a metal spring that applies radial pressure on the sealing lip, ensuring continuous contact with the shaft and optimizing the sealing effectiveness.

7. Split Seal: This style is designed for easy installation and replacement. It can be split into two halves, allowing it to be fitted around an existing shaft without the need for disassembly.

8. Labyrinth Seal: Labyrinth seals are non-contact seals that use a series of interlocking grooves or fins to create a tortuous path for fluids, preventing their escape.

9. Excluder Seal: This style is primarily used to exclude contaminants, such as dirt and dust, from entering the system. It offers minimal sealing against fluids but excels in keeping external particles out.

Wiper Seals (aka Dirt Wipers)

SBT specializes in the production of customized wiper seals. A wiper seal serves as an axial seal designed to prevent contamination while allowing a reciprocating shaft to pass through its inner bore. Its primary function is to safeguard hydraulic systems against particle infiltration. Wiper seals are commonly utilized to eliminate fluid contamination and prevent dirt from entering reciprocating shaft mechanisms.

These seals find widespread application in hydraulic and pneumatic cylinders, as well as in telescopic suspension forks for motorcycles and bicycles. At SBT, we offer a diverse range of wiper seals tailored to your specific requirements. Our wiper seals are manufactured using over 15 different polymer materials, including Nitrile/Buna-N (NBR), Fluorocarbon (Viton®, FKM), Silicone (VMQ), Fluorosilicone (FVMQ), Polyurethane (AU/EU), Natural Rubber (NR), Ethylene Propylene (EPDM), Hydrogenated Nitrile Rubber (HNBR), Styrene Butadiene Rubber (SBR), Chloroprene (Neoprene®), Urethane, and Teflon®.

By utilizing these high-quality polymers, we ensure that our wiper seals exhibit excellent performance and durability in diverse operating conditions. SBT is dedicated to delivering custom wiper seals that meet your specific needs, providing reliable protection against contamination and maintaining the integrity of your hydraulic systems.

Rotary Shaft Seal and Oil Seal Markets

SBT’s custom oil seals and shaft seals are currently used in the following industries.
We excel in gearbox related applications for the following industries:

• Gearboxes

• Fuel Pumps

• Augers Mixers & Dryers

• Casters

• Drilling Spindles

• Electric Motors

• Propeller Shafts

• Transmissions

• Compressors

• Liquid Handling Swivel

• Rolling Mill

• Vacuum Pumps

• Fuel Handling Flexible

• Couplings

• Geo-Rotors

• Racing Engines

• Hydrostatic

• Joints

• Agitators

• Gear Pumps

• Crank Shaft

• Hydraulic Motors & Pumps

• Wheel Hubs

If you would like more information about our range of Rotary Shaft Seals, download our catalogue, or contact a member of the team.

More informations might help you:

What is the Difference Between a Gasket & a Seal?

What is Oil Seal | Purpose , Types of Oil Seal , Advantages

A Guide to Select Oil Seals for Your Industrial Application