Skf two-way thrust ball bearing should pay attention to the use of grease

Grease is a two-way thrust ball bearing indispensable in the work, any skf bearing maintenance is inseparable from grease, some people ask, is the more grease the better? The answer is of course no, below The two-way thrust ball bearing should be noted when using grease.
In the case of two-way thrust ball bearings, excessive grease actually has many hazards. Because grease has good adhesion, wear resistance, temperature resistance, rust resistance and lubricity, it can improve high temperature oxidation resistance, delay aging, dissolve carbon deposits, and prevent metal chipping and oil staining. Improve the wear resistance, pressure resistance and corrosion resistance of the machine.
If the amount of grease is filled, the friction torque will increase. With the same filling amount, the friction torque of the sealed bearing is larger than that of the open bearing. After the grease filling amount is equivalent to 60% of the internal space of the skf bearing, the friction torque is no longer significantly increased. This is because most of the grease in the open bearing has been extruded, and the grease in the sealed bearing has also been lost. As the filling amount of the grease increases, the temperature rise of the two-way thrust ball bearing increases linearly, and the same filling amount, the temperature rise of the skf bearing is higher than that of the open bearing. It is generally believed that the grease filling capacity of sealed rolling bearings should not exceed 50% of the internal space. Tests by Shawki and Mokhtar have shown that two-way thrust ball bearings are most suitable for 20% to 30%.

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Influence of cleanliness on the performance of skf radial thrust ball bearings

1. Influence on the life of radial thrust ball bearings
  The cleanliness of skf bearings has a considerable impact on the life of radial thrust ball bearings, with the result that the difference is several times or even dozens of times. The higher the cleanliness of the radial thrust ball bearing, the longer the life and the like. The test shows that the lubricating oil with different cleanliness has a great influence on the life of the ball skf bearing. Therefore, improving the cleanliness of the lubricating oil can prolong the life of the radial thrust ball bearing. In addition, if the lubricating oil-containing dirt particles are controlled below 10 um, the life of the radial thrust ball bearing is also increased several times.
2. Influence on vibration and noise
  (1) Effect on vibration The degree of cleanliness seriously affects the vibration level of the radial thrust ball bearing, especially in the high frequency band. The skf bearing with high cleanliness has a low vibration speed value, especially in the high frequency band.
   (2) Effect on noise The grease company has tested the influence of dust in the grease of the radial thrust ball bearing on the noise, which proves that the more dust, the greater the noise.
3. Influence on Lubrication Performance The decrease in the cleanliness of the radial thrust ball bearing not only affects the formation of the lubricating oil film, but also causes deterioration of the grease and accelerates its aging, thereby affecting the lubricating performance of the grease.

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