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NSK Bearing Maintenance & Rust

Source:  skf bearing  Time:  2020-06-03


1.Keep NSK bearings lubricated and clean Before inspecting NSK bearings, the surface of NSK bearings should be cleaned, and then the parts around NSK bearings should be removed. It must be noted here that the oil seal is a very fragile part, so during inspection and disassembly, the NSK bearing should not exert excessive force to avoid damage to the parts. If the NSK bearing's oil seal and its surrounding parts have shown bad symptoms, please be sure to replace it, so as not to cause the bad oil seal will cause damage to the NSK bearing.

2. NSK bearing lubricant quality.

Many later found that the NSK bearing life is too short, in addition to other factors are normal, but the quality of the lubricant is also directly affected. The inspection method of NSK bearing lubricant is: rubbing a little lubricant between the two fingers, if there are contaminants, it can be felt; or apply a thin layer of lubricant on the back of the hand, and then perform the light sealing inspection . Then the lubricant of the NSK bearing is replaced. Note: It is best to filter the engine oil before use. When replacing grease with NSK bearings lubricated with grease, the Qiao remover used should avoid bringing cotton joints to any part of the NSK bearings. Because these residual fibers may be wedged between the rolling parts and cause damage, especially the application of small bearings needs to pay attention to this problem.

3. The working environment of NSK bearings.

When inspecting NSK bearings, do not expose them to pollutants or moisture. If the work is interrupted, the machine should be covered with oil paper plastic sheets or similar materials. The working environment of the bearing is also very important. Imported bearings in many machines are because the working environment is not good, which leads to the end of the life of imported bearings.

Vibration temperature

nsk bearing vibration

nsk bearing vibration is very sensitive to bearing damage, such as peeling, indentation, rust, cracks, wear, etc. will be reflected in the bearing vibration measurement, so it can be measured by using a special bearing vibration measuring device (frequency analyzer, etc.) The magnitude of the vibration cannot be inferred from the specific circumstances of the abnormality by the frequency points. The measured value differs depending on the use condition of the bearing or the installation position of the sensor, etc. Therefore, it is necessary to analyze and compare the measured value of each machine in advance to determine the judgment standard.

nsk bearing temperature

The temperature of the nsk bearing can generally be inferred from the temperature outside the bearing. It is more appropriate if the oil hole can be used to directly measure the temperature of the outer ring of the bearing. Generally, the temperature of the bearing slowly rises as the bearing starts to run, and reaches a steady state after 1-2 hours. The normal temperature of the bearing varies with the heat capacity, heat dissipation, speed and load of the machine. If the lubrication and installation parts are appropriate, the bearing temperature will rise sharply and abnormally high temperatures will appear. At this time, the operation must be stopped and necessary precautions must be taken.

NSK Bearing 6968 imported brand bearings are dedicated to building a comfortable and safe society through the operation and control technology.
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The cause of NSK bearing rust is very complicated. It may be that the anti-rust treatment of NSK imported bearings is not good, or it may be corrosion caused by moisture, and corrosion caused by paint mist. Let me explain to you in detail below.

There are mainly four types of acid components evaporating from the insulating paint used by most motor factories:

① Acid components of low molecular paint raw materials that have not reacted (anhydrous isophthalic acid and terephthalic acid, anhydrous maleic acid, trans-butenedioic acid).

②The acid component generated when the paint is cured (from phenolic modified paint, from formaldehyde to formic acid).

③ Lower fatty acids (formic acid, acetic acid) produced by heat or oxidative decomposition.

④Acid component generated after water decomposition of lacquer cured product. The main acid component produced by insulating varnish is formic acid, and there is a close relationship between the amount of formic acid and the degree of rust.
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