What are the conditions for lubricating bearings with grease

What are the conditions for lubricating bearings with grease

The conditions for lubricating bearings with grease mainly include the following aspects:

1. Working conditions:

Temperature: The use temperature of lubricating grease should be 20-30 ° C lower than its drip point. Under high temperature conditions, lubricating grease 

with good antioxidant performance, low evaporation loss, and high drop point should be selected, such as composite lithium based, composite calcium 

sulfonate based, or polyurea based lubricating grease.

Speed: High speed bearings should use lubricating grease with high cone penetration made of low viscosity base oil, while low-speed bearings should choose 

lubricating grease with high cone penetration grade made of high viscosity base oil.

Load: High load and low-speed bearings should use lubricating grease with higher viscosity, while low load and high-speed bearings should choose lubricating 

grease with higher cone penetration.

2. Environmental requirements:

Humidity and corrosiveness: Under humid conditions, lubricating grease with good water resistance, such as calcium based grease, should be selected; In corrosive 

environments, corrosion-resistant bearing grease should be selected.

Dust and pollution: In environments with a lot of dust, it is necessary to choose lubricating grease with good adhesion and sealing properties to prevent impurities 

from entering the bearings.

3. Other requirements:

Rust prevention: The grease used in bearings must have a rust prevention effect, and the rust inhibitor should preferably be insoluble in water.

Mechanical stability: Lubricating grease should not leak due to softening during mechanical processing and should have good mechanical stability.

Compatibility: Incompatible oils and fats should not be mixed together to avoid damaging the lubrication effect and bearings.

Filling amount: The filling amount of lubricating grease should be as little as possible while ensuring sufficient lubrication of the bearing, to avoid excessive waste 

and heat accumulation.

By considering these conditions comprehensively, suitable bearing grease can be selected to ensure that the bearing can operate stably for a long time.