Under what conditions do rolling bearings use grease lubrication? What issues should be noted?

Under what conditions do rolling bearings use grease lubrication? What issues should be noted?

Rolling bearings are lubricated with grease under the following conditions:

1. Load conditions: Rolling bearing grease lubrication is suitable for low-speed and low load operation. Specific conditions include:The bearing load

is relatively small, and the static load is greater than the dynamic load.Bearings operate at low speeds, with low rotational speeds and minimal frictional 

heat.The working environment temperature is low, and the temperature has little effect on grease lubrication.

2. Speed conditions: The applicable speed range for grease lubrication is relatively narrow and generally suitable for low-speed operation. The specific 

conditions include: the bearing speed is relatively low, generally below a DN value (the product of diameter d and speed n) of 20000rpm · mm.When the 

bearing undergoes reciprocating motion or slight rotation, the speed is low and the load is small.Under low temperature conditions, grease lubrication 

will be more stable.

3. Temperature conditions: Lubricating grease has good stability at different temperatures. Specific conditions include:The working environment tem

perature of the bearing shall not exceed 80 ℃.When the working environment temperature of the bearing is between 0 and -30 ℃, grease lubrication is 

more stable.If the ambient temperature is high, a clearer grease lubrication method needs to be adopted.Attention should be paid to the following issues 

when using grease lubrication:

Choose the appropriate grease: Choose the appropriate type of grease according to the working environment. For example, lithium based low-temperature 

grease should be used in cold regions, and calcium based grease should be used in environments with high humidity.

Control the amount of grease injection: It is best to evenly cover the contact area with a thin layer of uniform grease film to avoid excessive or insufficient 

grease injection.Regular inspection and maintenance: Regularly check the lubrication status of the bearings to ensure the cleanliness and sealing of the 

lubricating grease, and prevent impurities from entering the interior of the bearings.

Avoid high temperature environments: In high temperature environments, choose high-temperature lubricating grease with higher drip points and take 

appropriate cooling measures.

Choose the appropriate lubrication method: Choose the appropriate lubrication method according to the specific working conditions, such as manual 

lubrication, oil cup dripping, oil bath, etc.

Through the above conditions and precautions, the performance and service life of rolling bearings can be effectively ensured when lubricated with grease.