Should newly purchased bearings be cleaned with washing oil before assembly?
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When replacing bearings, we clean the new bearings every time, but the sound is very loud when we turn it by hand after cleaning. It seems that the quality of the bearings is not up to standard. Is it a problem with the quality of the bearings themselves?
You should be referring to* Moving bearing? Newly purchased bearings usually have a layer of grease similar to anti-rust oil, but we usually don't clean it - this amount of oil is too little compared to the added lubricant, and it has to be replaced again. As for the sound after cleaning, it may be that the cleaning agent has destroyed the original oil film, or the cleaning agent contains impurities.
It needs to be cleaned according to the regulations. If any fitter is unclear, punish him severely.
After cleaning, add qualified grease. When cleaning, pay attention to the cleanliness of the cleaning fluid to avoid secondary contamination of the bearings.
No need to clean unless contaminated. Add clean butter once installed.
The clearance of the new bushing is very small, and it has standard requirements. The new bushing has a loud sound, and I wonder if I bought a fake one. It is necessary to clean the new bushing. There is protective ester on it, so it must be cleaned.
Personal advice: Must be cleaned.
Newly purchased bearings need to be cleaned before installation. This is because the bearings are packaged after leaving the factory and being transported. However, after being transferred several times, and after being in the hands of the user for several days and multiple processes, the bearing surface will be contaminated to varying degrees and must be thoroughly cleaned. It is best to check the bearing quality after cleaning, such as balls (rollers), inner and outer ring slides and clearance. Bearings that exceed the standard and fail to meet the standards must not be installed.
For products from big foreign brands such as SKF and FAG, they do not recommend cleaning because their packaging completely guarantees that there are no impurities inside. if * If it is produced by some small manufacturers, it may be better to clean it. I have seen some domestic bearing dealerships. Bearings are piled everywhere, and some of the packaging is seriously damaged. It is estimated that they will not be used unless they are cleaned.
No cleaning is required, and there will be no problems when the anti-rust oil is mixed with lubricating oil or grease. In addition, if you feel that the bearing is in poor condition after cleaning, it should be because there is no grease lubrication. If the bearing is still not in good condition after applying a layer of lubricating oil, it is a bearing quality problem. This situation can usually be seen before cleaning.