A bearing rubber seal is a flexible barrier made of rubber that attaches to the outer ring of a bearing to protect its internal components. It prevents contaminants such as dust, dirt and moisture from entering, and helps retain lubricants, thereby extending the service life of bearings and improving performance. Rubber seals are common in both ball and roller bearings, especially in applications where they are exposed to harsh environmental conditions.
Bearing rubber seals are extremely important in some bearings, which can protect the service life and work efficiency of bearings, so FTM will also customize the size, shape and thickness of bearing rubber seals according to the needs of bearings to ensure the use of bearings.
Design and function:
Rubber seals are usually installed on the outer ring and contact or form a tight fit with the inner ring to form a protective barrier.
The seal prevents outside contaminants from entering while retaining lubricants (such as grease or oil) within the bearing, thereby reducing friction and wear.
Materials:
Rubber seals can be made with oil resistant nitrile (NBR) or Viton (FKM), which is known for its high temperature and chemical resistance.
Types of rubber seals:
Contact seals: These seals are in direct contact with the inner ring of the bearing, providing a tighter seal and providing excellent protection, although they may increase slight friction.
Non-contact seals: These seals do not contact the inner ring directly, allowing for lower friction and higher speeds, but may not be as tight as contact seals.
Application program:
Commonly found in automotive parts, such as wheel bearings.
For agricultural machinery, conveyor systems, industrial equipment and power tools that operate in dusty, grime or wet environments.
Advantages of FTM bearing rubber seals:
Strengthen the protection of bearing components and extend the service life.
Reduce maintenance because the seal helps retain the lubricant in the bearing.
Versatility with different material options tailored to the specific environment, be it heat, chemicals, or humidity.
Shaoxing Shangyu Flight Seiko Machinery Co., Ltd. (FTM), founded in 2006, is China Custom Bearing Rubber Seal Suppliers and Wholesale Custom Bearing Rubber Seal Factory.And it an enterprise focusing on the R&D, manufacturing, and customization of non-standard bearings, high-precision bearings (import substitution), and bearing accessories and mechanical parts. With more than 30 years of technical design experience, FTM has earned an excellent reputation in the field of high-quality bearings. Our professional technical team provides domestic and foreign customers with high-quality bearing solutions in engineering machinery, textile machinery, and other fields.
Relying on years of professional manufacturing and technical skills, FTM actively introduces advanced CNC machine tools from Japan to ensure product processing accuracy and stability. In addition, FTM's bearing product research is guided by a doctor of tribology. We adhere to the corporate philosophy of innovation and development, and our products are exported to many countries and regions around the world. We have long been supporting and producing various types of bearings for many world-renowned companies, maintaining good production relationships. Spin into eternity, inherit excellence, and create the future together. Choose FTM, and we will be your best choice for bearing solutions.
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At Shaoxing Shangyu Flight Seiko Machinery (FTM), we understand that the longevity of a high-precision bearing often depends on the quality of its smallest components. Our Custom Bearing Rubber Seals serve as a critical flexible barrier, meticulously engineered to press-fit into the outer ring and provide an airtight shield for internal rolling elements.
By utilizing advanced synthetic rubber compounds, these seals perform two vital functions: they lock essential lubricants inside the raceway to prevent dry-running and act as an impenetrable defense against external contaminants like fine dust, abrasive grit, and moisture. In demanding environments—such as textile machinery prone to fiber buildup or construction equipment exposed to the elements—a high-quality seal is the difference between consistent performance and premature failure.
Leveraging over 30 years of technical design expertise, FTM goes beyond standard off-the-shelf options. We specialize in the R&D and customization of non-standard seals, allowing us to adjust the size, shape, and thickness to meet the specific torque and temperature requirements of your application. Whether you need low-friction seals for high-speed rotation or reinforced barriers for heavy-duty mechanical parts, our technical team provides bespoke solutions that ensure your bearings achieve their maximum theoretical service life.
1. What materials are typically used for custom bearing rubber seals
Most seals are manufactured from Nitrile Butadiene Rubber (NBR) due to its excellent resistance to oils and wear. However, for specialized applications involving high temperatures or chemical exposure, FTM can provide seals made from Fluorocarbon (FKM) or other high-performance elastomers.
2. Can FTM customize seal thickness for non standard bearing housings
Yes. One of our core strengths is the manufacturing of non-standard components. We can adjust the radial thickness and axial width of the seal to ensure a perfect interference fit, even in customized or import-substitution bearing projects.
3. How do rubber seals compare to metal shields
While metal shields are excellent for high-speed applications with low friction requirements, rubber seals provide a much higher level of protection against liquids and fine particles. Rubber seals are contact-based, meaning they offer a superior physical seal that is ideal for harsh or outdoor environments.
4. How does a custom seal help in reducing maintenance costs
By preventing the ingress of contaminants and reducing grease leakage, our seals extend the interval between maintenance cycles. This reliability reduces downtime in critical machinery, particularly in sectors like engineering and industrial manufacturing.
5. Does FTM provide technical support for selecting the right seal design
Our professional technical team works directly with clients to analyze their specific working conditions. We help determine the optimal sealing pressure and material compatibility to ensure the seal does not interfere with the bearing’s rotational efficiency while still providing maximum protection.
If you have any questions or would like to know more about bearings, please feel free to contact us!
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