What are the maintenance tasks of NSK bearings?

1. Keep NSK bearings lubricated and clean

Before inspecting the NSK bearing, the surface of the NSK bearing should be cleaned before the parts around the NSK bearing are removed. Pay special attention to the fact that the oil seal is a very fragile part, so do not apply excessive force when inspecting and disassembling the NSK bearing to avoid damage to the part. If you have been experiencing bad symptoms when inspecting the oil seal of the NSK bearing and its surrounding parts, be sure to replace it to avoid damage to the NSK bearing caused by a bad oil seal.

2, to ensure the quality of NSK bearing lubricant

Many late found NSK bearing life is too short, except for other factors are normal, but the quality of the lubricant is also directly affected. The inspection method for NSK bearing lubricant is: rubbing the lubricant on the two fingers, if there is any contaminant, it can be felt; or apply a thin layer of lubricant on the back of the hand, then seal the light. . Then it is to replace the lubricant of the NSK bearing.

3, NSK bearing working environment

When inspecting NSK bearings, do not expose them to contaminants or moisture. If the work is interrupted, cover the machine with a piece of oil-paper plastic or similar material. The working environment of the bearing is also very important. Many imported bearings in the machine are not working because of the working environment, which leads to the end of the life of the imported bearings.

4, NSK bearing seal

The purpose of the bearing seal: to prevent dust, moisture and impurities from entering the bearing, but also to prevent the loss of lubricant. A good seal ensures that the machine works properly, reduces noise and extends the life of the parts.

The above is the relevant introduction of NSK bearing maintenance work, mainly from four aspects to explain, in fact, these four aspects are also related to each other, such as the bearing seal, in order to keep the bearing lubrication and clean, working environment It is also related to cleaning. Therefore, NSK bearing maintenance work is carried out closely around the four words of clean, lubrication, sealing and environment.
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How to prevent rust of motor bearings

1. Try to use solvent-free paint;

2. As far as possible, use an impregnating lacquer that does not contain oxidizing components, such as Epoxy-urethane-based or Epoxy-based impregnating varnish;

3. When using melamine acid impregnating varnish, the curing temperature and curing time should be adjusted. The curing temperature is slightly higher than 130 °C (such as 135 °C) and the curing time is more than 180 min, and the process must be strictly performed, especially at high temperature. In the wet season, because of the concept of rust prevention, the drying (curing) time of the paint specified in the paint factory sample is not necessarily sufficient, and the motor has a specific internal shape;

4, the use of paint without volatile acid, good hydrolysis resistance paint;

5, try to use mineral oil bearing grease;

6. When the motor factory injects the grease by itself, in order to avoid the noise and possible rusting of water vapor and dust entering the bearing, the grease container should be sealed, even when filling the grease. The amount of grease should be determined according to the standard. If the bearing is used, the reference value is in the range of 0.60~0.80g, and the grease filling process should be kept clean and dry;

7. Use plastic film packaging with micro-holes to make the motor breathable before it is activated. When the package is sealed with a plastic film, the paint gas will remain in the bearing and the water will condense and should be avoided;

8. The grease may deteriorate under the influence of high temperature when the motor cover is sprayed or painted.

9. Consult with the bearing manufacturer to use a more effective rust inhibitor when the bearing is produced;

10. In order to completely solve the paint rust, it can be considered by the motor manufacturer, the bearing production plant and the paint production unit to jointly discuss various aspects of the ability to solve the bearing corrosion.

Through the above introduction, the method and steps of rust prevention of motor bearings, I believe everyone can understand. In fact, it is summarized in three parts. The first is how to choose the impregnating varnish, then the choice of grease, and finally the comprehensive ability to solve the problem of bearing corrosion. In Xiaobian's view, the last point is still quite difficult and requires the joint efforts of all parties.
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