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Bearing grease is very important.How to avoid grease loss from bearings?

The Functions and Shortcomings of Bearing Seal Assemblies

Bearing shields and seal assemblies are key protective structures that guard the grease inside the bearing, effectively blocking the intrusion of external particulate contaminants while preventing grease leakage. However, there are differences in the effectiveness of different types of sealing components:

Non-Contact Dust Shields

These dust shields avoid contact with the inner ring, which prevents torque increases during startup or operation. However, they offer limited sealing performance and cannot effectively prevent grease washout.

Contact Seal Assemblies

Nitrile rubber contact seal assemblies fit tightly against the bearing’s inner ring to prevent contamination effectively. However, these seals increase friction torque, which can reduce the bearing’s operating efficiency. Therefore, you must implement additional protective measures.

Compromise: Non-Contact Seal Assemblies

Non-Contact Seal Assemblies are an alternative between dust shields and contact seal assemblies. They are also made of Nitrile rubber, but they do not rub against the inner ring and therefore have no effect on torque or maximum speed. These seal assemblies provide better protection than metal shields and are suitable for most routine application scenarios.

PROFESSIONAL ADVICE FOR PREVENTING GREASE WASH OUT

For the best protection against washout bearing grease, consider the following measures:

Select the right grease

Highly water-resistant grease: Provides protection against water washout and maintains lubrication.

Food grade grease: Suitable for use in the food processing industry and can withstand regular steam cleaning or chemical washing.

PFPE grease: extremely resistant to chemicals and suitable for use in harsh environments.

Optimized sealing system

For high-speed and light-duty application scenarios, a combination of non-contact seals and contact seals can be considered.

For heavy loads or highly contaminated environments, double-lip contact seals are recommended.

Installation of guards

Install protective cover on the outside of the bearing to reduce direct external impact.

Design drainage channels to avoid continuous scouring of the bearings by stagnant water.

Regular Maintenance Inspection

Regularly check the wear condition of the seal assembly.

Monitor the condition of the grease and replenish or replace it in a timely manner.

Bearing grease is very important. By comprehensively applying the above methods, you can significantly improve the anti-scouring ability of the bearings to prolong their service life and ensure the stable operation of the equipment.