Bearing Rubber Seals Description
Bearing rubber seals are an important component in the industrial field, their main function is to protect the bearing from the ingress of dust, moisture and other contaminants, and at the same time to prevent the leakage of lubricating grease. The design and material selection of these seals are critical to ensure the long-term stable operation of the bearings. The following is a detailed introduction to bearing rubber seals.
The role of bearing rubber seals
The main functions of bearing rubber seals can be summarized as follows:
Dust protection: Prevents dust and other solid particles from entering the inside of the bearing, which can cause wear and premature failure.
Waterproofing: Prevents moisture from entering the bearing, which can lead to corrosion and dilution of lubricants.
Leak-proof: Prevent lubricating grease leakage, maintain the lubrication state inside the bearing, and reduce maintenance costs.
Extended life: Extend the life of the bearing by reducing the ingress of contaminants and the loss of lubricating grease.
| Product name | Bearing Rubber Seals |
| Product material | Silicone rubber, Polyurethane, FKM, NBR |
| Hardness (Shore A) | 20 to 90 |
| Applicable temperature °C | -60 to 300 |
| Color | Black, orange, blue, yellow, green, custom |
| Size | Standard/ Custom |
| Advantage | Wear resistance, high pressure resistance, high temperature resistance, corrosion resistance |
| Application | Rotating machinery, Rotate the valve, Rotate the conveyor belt |
| Certification | ISO: 9001, ISO: 14001, IATF: 16949 |
Type of seal
There are several types of bearing rubber seals, including:
Contact seals: The seal is in direct contact with the shaft and prevents contaminants from entering through friction.
Non-contact sealing: The seal is not in direct contact with the shaft, but is protected from contaminants by means of air flow or oil film.
Single Lip Seal: There is only one sealing lip, which is suitable for one-way sealing.
Double Lip Seal: There are two sealing lips that can provide a two-way seal.
Material selection
The choice of material for rubber seals has a significant impact on their performance. Common materials include:
Nitrile rubber (NBR): has good oil and abrasion resistance and is suitable for most industrial applications.
Fluoroelastomer (FKM): It has excellent chemical resistance and high temperature resistance, and is suitable for special environments.
Silicone rubber: It has excellent heat and ozone resistance and is suitable for high-temperature environments.
Polyurethane: It has high elasticity and wear resistance, and is suitable for high-speed rotating bearings.
Design Considerations
When designing bearing rubber seals, the following factors need to be considered:
Size and shape of the shaft: The seal must match the size and shape of the shaft.
Operating temperature: Choose a material that can withstand the operating temperature.
Speed: Bearings rotating at high speeds need to consider the effect of centrifugal force on the seals.
Environmental conditions: Consider the type and concentration of pollutants in the environment.
Maintenance and Replacement
The maintenance and replacement of bearing rubber seals is the key to ensuring the long-term stable operation of bearings. Regularly inspect seals for wear and tear and replace them if necessary. When replacing, you should pay attention to:
Cleaning: Clean the shaft and housing thoroughly before installing new seals.
Lubrication: During installation, ensure adequate lubrication between the seal and the shaft.
Correct installation: Make sure the seals are installed correctly to avoid twisting or damage.
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