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Lubricants - Industrial

Mixing different greases, even those with similar thickener types, can sometimes lead to ineffective lubrication resulting in damage of the lubricated components. If not spotted soon enough this may lead to equipment failure.

Many rolling element bearings require relubrication of small quantities of grease between grease flushing intervals.

This is best done with a low-pressure grease gun. If seals are in good condition, the quantity of grease needed may be small and infrequent.

Check the amount of grease in the bearing – remove fitting or grease plug to allow excess grease to come out.
Check bearings and seals for excess leakage.
Apply a few “shots” of grease at a time.

Yes, with the following conditions:

If the amount of oil is small, covering only low spots in the surface of the grease.
The grease readily absorbs the oil upon stirring.

Ahead of applying a new grease, thoroughly clean – or flush out – the previous grease from the bearing. This avoids compatibility issues and helps ensure that the new grease can perform at an optimum level.

If this cannot be carried out, mitigating actions should focus on minimizing the amount of the displaced grease remaining in the application, such as by increasing relubrication frequency to facilitate a purge of old grease in a timely manner.

Where bearings are subject to contamination, more frequent relubrication may be necessary.

Contamination will lead to unusual operation such as hot, noisy, vibrating or leaking bearings. Be sure to spot, report and act on those.

How important is cleaning excess grease and dirt?
Be sure to clean up all excess grease and dirt from the bearing and surrounding areas. Excess grease and dirt on external surfaces acts as an insulator and prevents heat dissipation. Additionally, excess grease on the external surfaces and floors can introduce a safety hazard to personnel.