Based on what conditions to determine whether the bearing lubricating oil has deteriorated

Lubricating oil is very important for the operation of bearings, and the quality of lubricating oil directly affects the service life of bearings, especially precision bearings have higher requirements for lubricating oil. If the quality of lubricating oil is too poor or deteriorates, it will directly affect the operation and service life of bearings, so it is necessary to ensure that the lubricating oil does not deteriorate. The importance of lubricating oil to bearings goes without saying, so when using bearings, it is necessary to always check the lubricating oil to ensure that the lubricating grease does not deteriorate. However, some friends do not know how to determine whether the bearing lubricating oil has deteriorated. Today, we will talk about several methods to identify whether the bearing lubricating oil has deteriorated.

1. Oil droplet tracing method

Take a clean white filter paper and drop several drops of oil onto it. After the lubricating oil leaks, if there is black powder on the surface and there is a feeling of obstruction when touched by hand, it indicates that there are many impurities in the lubricating oil. Good lubricating oil has no powder, and when touched by hand, it is dry and smooth, with yellow marks.

2. Oil flow observation method

Take two measuring cups, one containing the lubricating oil to be inspected, and the other empty on the tabletop. Lift the measuring cup filled with lubricating oil 30-40 centimeters away from the tabletop and tilt it, allowing the lubricating oil to slowly flow into the empty cup. Observe its flow situation. A good quality lubricating oil should flow in a thin, uniform, and continuous manner. If there is a sudden increase or decrease in oil flow, and sometimes a large block flows down, it is said that the lubricating oil has deteriorated.

3. Hand twisting method

Twist the lubricating oil between the thumb and index finger and grind it repeatedly. A better lubricating oil hand feels lubricity, less debris, and no friction. If there is a large friction sensation such as sand particles between the fingers, it indicates that there are many impurities in the lubricating oil and it cannot be used anymore. The lubricating oil should be replaced with a new one.

4. Illumination method

On a sunny day, use a screwdriver to lift the lubricating oil at a 45 degree angle to the horizontal plane. By comparing with sunlight and observing the condition of oil droplets, it can be clearly seen that there is no debris in the lubricating oil under sunlight. It is considered good and can continue to function. If there is too much debris, the lubricating oil should be replaced.

The above is an introduction to how to determine whether the lubricating oil of bearings has deteriorated. High quality lubricating oil flows in a thin, uniform, and continuous manner; If the flow rate fluctuates, sometimes with large blocks flowing down, it indicates that the lubricating oil has deteriorated. After the bearing lubricating oil deteriorates, it is dark black, with more foam and emulsification. Grinding with fingers, it has no sense of viscosity, astringency or odor. Dropping on white paper, it is dark brown, without yellow soakage area or many black spots. If not replaced in a timely manner, it will accelerate the wear of components, affect their service life, and even cause safety accidents.