Why Bearing Units Use Triple Seals

Why Bearing Units Use Triple Seals

In industrial applications, bearing units are important for ensuring smooth mechanical movements and reducing friction between moving parts. Sealing solutions play a crucial role in protecting these units from environmental contaminants like dust, water, and other particles.

One of the most effective sealing methods involves the use of triple-lipped seals, which offer extreme protection and extend the lifespan of bearings. In this article, we’ll explore what bearing units are, the importance of seals, why bearing units use triple seals, and how triple-sealed bearings boost performance.

What Are Bearing Units?

Bearing units are mechanical components designed to support rotating shafts and minimize friction. They consist of a bearing—usually a ball, roller, or needle bearing—mounted inside a housing cage. Bearing units can be found in an extensive array of equipment, from conveyor systems and pumps to motors and gearboxes, making them essential in various industries such as automotive, manufacturing, and agriculture.

Functions of bearing units:

  • Lubricating moving parts to reduce friction
  • Supporting radial and axial loads
  • Facilitating smooth rotation
  • Minimizing wear and tear

What is the Purpose of Bearing Seals?

Seals are crucial in maintaining the efficiency and longevity of bearing units. The main purpose of the seals is to prevent dirt, water, and debris from entering the bearing housing. Moreover, seals ensure smooth operation by retaining lubrication within the bearing unit.

Improper sealing could result in corrosion, wear, and eventual failure of the bearings. Consequently, you might face unscheduled downtime and expensive repairs may be required. Bearing seals help:

  • Keep contaminants out
  • Retain lubricant within the bearing
  • Reduce friction between the seal and rotating shaft
  • Prolong the life of the bearing unit

Why are Sealed Bearings Used?

Sealed bearings are designed for environments where contamination and moisture are major concerns. Traditional bearings may be vulnerable to external elements, but sealed bearings offer enhanced protection, reducing the need for frequent maintenance and increasing operational efficiency.

They’re widely used in mining and construction to avoid the entrance of dust and debris into the assembly. At the same time, marine equipment, food processing industries, and agricultural plants also use sealed bearings to offer protection against moisture, salt, and mud.

Sealing Solutions for Bearing Units

Based on the type of bearing and its operating environment, different sealing solutions are available. These include:

  • Single-Lipped Seals: Common for less demanding environments, these offer basic protection.
  • Double-Lipped Seals: Provide better sealing than single-lipped but may still be inadequate for harsh environments.
  • Triple-Lipped Seals: Offer the highest level of protection, ideal for environments with high levels of contamination and moisture.

Compared to single and double seals, triple-lipped seals provide a more comprehensive solution for industries where downtime due to bearing failure is costly. This solution results in a significant extension of the device’s lifetime to more than 7 months (at least a 133% improvement).

Triple Sealed Bearing Units

Triple-sealed bearing units are specifically engineered to offer extra protection compared to single or double-sealed bearings. The “triple” in their name refers to the 3 layers of sealing lips, each providing an additional barrier against contaminants and moisture. These seals are typically made of rubber or other flexible materials that maintain a tight seal, even in extreme conditions.

The 3 layers function as follows:

  1. First Layer: The outermost layer deflects larger contaminants like dust, dirt, and solid debris.
  2. Second Layer: This middle layer provides extra security by blocking smaller particles and moisture.
  3. Third Layer: The innermost layer retains lubrication, ensuring smooth bearing rotation.

Businesses can improve the durability of their equipment, minimize the need for maintenance, and ensure smoother operations, using triple sealed bearings.

Types Of Triple Seal

Low-torque triple-sealed bearing

(Cylindrical-bore, set-screw type)

UC201D1LLJ through UC218D1LLJ

UC305D1LLJ through UC320D1LLJ

High-torque triple-sealed bearing

(Cylindrical-bore, set-screw type)

UC201D1LLS through UC212D1LLS

(Square-bore type for agricultual machines)

1AS08-11/8, 4AS09-11/4, etc.

Limits on Operating Temperature and Speed

  • Triple-sealed bearings are suitable for temperatures between -15 °C and 100 °C.
  • Suitable speed Low-torque triple-sealed bearing unit… dn value : 36000
  • High-torque triple-sealed bearing unit… dn value : 21000

Triple Lipped Seals Advantages

Triple-lipped seals offer several advantages over traditional sealing methods, and here is why many bearing units use triple seals:

Enhanced Protection

The three layers of sealing help block out a wider range of contaminants, including fine dust and moisture.

Extended Bearing Life

By preventing contamination and retaining lubrication, triple-lipped seals increase the lifespan of the bearing units.

Reduced Maintenance

With better protection, businesses can save on time and resources spent on frequent maintenance checks and repairs.

Improved Performance

Bearings with triple-lipped seals remain lubricated and free from contaminants, ensuring smoother and more efficient operation.

Cost Savings

Over time, the reduced need for repairs and replacements offer significant cost savings.

Why Choose BYWB Triple-Sealed Bearings for Bearing Units?

If you are looking for reliable and durable triple-sealed bearings, then BYWB is your go-to place. Our Triple-Sealed Bearings are engineered for industries that require heavy-duty performance and long-lasting protection. These bearings are designed with precision and durability in mind; we are proud to serve customers across over 20 countries with our high-quality products, ensuring that they meet the highest industry standards.

Why Our Customers Choose Us:

  • Robust Contamination Control
  • High-Quality Materials
  • A Variety to choose from
  • Compliance with ISO standards for quality
  • Rigorous quality control processes
  • Large stock available for fast shipping
  • Using premium materials for durability
  • Providing custom sizing options
  • Low minimum orders
  • A strong 2-year warranty guarantee
  • Expert Support

Final Words

Let’s wrap this up, with the fact that triple-sealed bearing units offer significant advantages in terms of protection, performance, and cost savings. Bearing units use triple seals to handle the most challenging environments, minimizing the risk of contamination and maximizing the lifespan of the bearing. BYWB is the right place when looking for bearing unit seals that operate in harsh conditions and want less maintenance and longer operational lifespans. Consider BYWB’s triple-sealed bearings for their high-tech performance, durability, and support. If you have any other questions, contact our BYWB team?anytime!


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