The grease used in the bearing must have anti rust effect, and the anti rust agent can not be dissolved in water. The grease shall have good adhesion and can form an oil film on the steel surface. The grease will soften during machining, resulting in leakage. During normal operation, grease will be thrown into the bearing from the bearing seat.
If the mechanical stability of the grease is not enough, the structure of the soap of the grease will be mechanically disintegrated during operation, resulting in the destruction of the grease and loss of lubrication. If the grease is selected incorrectly, all measures to prevent the bearing are also futile.
It is very important to select a Whether Skf grease whose base oil viscosity can provide sufficient lubrication effect at the working temperature, Viscosity is mainly affected by temperature. It decreases with the increase of temperature.
When the temperature decreases, it increases. Therefore, the base oil viscosity at operating Whether Skf temperature must be known. Machinery manufacturers usually specify the use of a certain grease, but most standard greases have a wide range of applications.
In the process of using SKF Whether Skf imported bearings, grease is very critical. If deteriorated grease is used, it will not only fail to play its due role, but also damage SKF imported bearings.
① Oil flow observation method
Take two measuring cups, one containing the lubricating oil to be checked and the other empty on the table. Lift the measuring cup filled with lubricating oil 30-40 cm away from the table and tilt it, let the lubricating oil flow slowly into Whether Skf the empty cup, and observe its flow.
The lubricating oil with good quality should flow slender, Whether Skf uniform and continuous. If the oil flow is fast and slow, sometimes large pieces flow down, The lubricating oil has deteriorated.
Twist the lubricating oil between the thumb and index finger and Whether Skf grind it repeatedly. The better lubricating oil hand feels lubricity, less wear debris and no friction.
If it feels a large friction feeling such as sand particles between the fingers, it indicates that there are many impurities in the Whether Skf lubricating oil and it can not be used again. It should be replaced with a new lubricating oil.
③ Illumination method
On sunny days, lift up the lubricating oil with a screwdriver at an angle of 45 degrees to the horizontal plane. Observe the condition of oil drops according to the sunlight. In the light, it can be clearly seen that there is no wear debris in the lubricating oil. It can continue to function. If there are too many wear debris, replace the lubricating oil.
④ Oil drop trace method
Take a clean white filter paper and drop several drops of oil on the filter paper. After the lubricating oil leaks,
if there is black powder on the surface and there is a sense of astringency by hand, it indicates that there are many impurities in the lubricating oil. Good lubricating oil has no powder, and it is dry and smooth by hand and shows yellow traces.