1. Immersion method: NSK bearings are immersed in anti-rust grease, so that the surface is adhered with a layer of anti-rust grease. The oil film thickness can be achieved by controlling the temperature or viscosity of the rust preventive grease.
2. Brushing method: It is used for NSK bearings or special-shaped bearings that are not suitable for soaking or spraying. When brushing, it is necessary to pay attention not to produce anti-rust oil accumulation, but also to prevent leakage coating.
3, spray method: some large NSK bearings can not be immersed oil, generally with a pressure of about 0.7Mpa of filtered compressed air in the air cleaning place for spraying. The spray method is suitable for solvent-diluted anti-rust oil or thin-layer anti-rust oil, but it must adopt perfect fire and labor protection measures.
The cleanliness of the bearings has a considerable impact on the life of NSK bearings. We have conducted special tests for this purpose, and the result is several times or even dozens of times. The higher the cleanliness of the bearing, the longer the service life shows that the lubricating oil with different cleanliness has a great influence on the life of the ball bearing. Therefore, improving the cleanliness of the lubricating oil can prolong the life of the NSK bearing. In addition, if the lubricating oil-containing dirt particles are controlled below 10 um, the bearing life is also increased several times.
1. Influence on vibration The test results of our test center show that the cleanliness seriously affects the vibration level of the bearing, especially the vibration of the high frequency band is more significant. Bearings with high cleanliness have low vibration speed values, especially in the high frequency band.
2. Influence on noise The effect of dust on noise in NSK bearing grease has been tested to prove that the more dust there is, the greater the noise.
3. Influence on Lubrication Performance The decrease in the cleanliness of the NSK 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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