The so-called cleaning test is to separate the impurities in the rolling bearing and measure the test method of the rolling bearing by a certain means. The current cleanliness detection method has the following: quality test, microscope count test, automatic particulate counting test .

1: Quality method test.
According to the relevant standards of the JB / T⒛50-2005, the impurities in the rolling bearing are first cleaned into the cleaning liquid, and the quality of the impurity particles is calculated after filtration, drying, weighing, and weighing.

2: Microscope method.
The previous steps and mass methods of this method are similar, and when the cleaning fluid is filtered, the size and quantity of impurity particles in the filter membrane are directly filtered. Moreover, the chemical composition and content of impurities can also be judged according to the shape of impurities. This method is most suitable for the determination of SKF bearing precision bearing cleanliness.

3: Automatic particulate counting test.
The automatic particulate calculation method and mass method, the microscope method is different, it is the method of using the photoelectric principle theory, directly on the number of impurity particles and the magnitude determination. This method is relatively high, generally suitable for rolling bearings with higher cleanliness requirements.

Burns occurred in bearings
The so-called SKF bearings have a burns injury. The state is that the roller wheel, the rolling body, and the cage of the bearing are rapidly welded until discoloration, softening, welding and damage. The main reason for causing bearing burns is due to poor lubrication of the rolling bearing, there may be an informal lubricant, or too much lubricant, too little, is incorrect.

It may also be too large load (pre-pressing too large). The speed is too large. Over the clearance. There is water or other foreign object invasion. If the two cases above are not the axis, the accuracy of the bearing box is poor, and the deflection of the shaft is large. Seeing this, I think everyone wants to know the solution, first, to study the lubricant and lubrication method, choose the rolling bearing lubricant, and its dosage, and correct the choice of SKF bearings. The study should be cooperated, bearing gaps and preloads, and improve the sealing device. Check the accuracy of the shaft and bearing box.