Put fat content on sealing influence on the performance of the large number of experiments show that the note fat mass is bearing cavities within about 30%  as in the bearing no internal fat reached saturation, so grease rarely used.Put fat is more than 30%, the bearing internal local generation saturated state, when put fat mass reached 50%, the bearing grease in total saturation, the excess fat was "squeeze" piece. Pay special attention to, and sometimes even though fat note of few, but put fat method is not standard, science, lead to bearing cavity fat not even, also can appear bearings inside local saturated, occurred early fast "squeeze" the phenomenon.

As for all fat process, suggest speed may improve a little. Seal bearing test and evaluation seal bearing the test method is sealed bearings for different performance characteristics and USES to launch, and the different emphasis, and carry out the experiment content is the same, but each performance test is an important project research content, at the same time, seal bearing test and evaluation method is validated and improvement design and quality control of the very important means.

2: bearing stiffness:

1. The stiffness of the bearing depends on the type and size. Main judgment criterion is: roller element type (such as spherical or cylindrical), roller number and size and contact Angle.

2. Contact Angle of impact of stiffness, general contact Angle is small, it meets the radial high stiffness; Contact Angle, is content axial high stiffness. In layout bearing, the same position install two or more bearing can increase the stiffness. Angle contact ball bearing the most suitable for the use and is often use pairing.

3. Bearing stiffness expression for load of elastic deformation and recovery ratio of degree. Because of the rolling bearing restore elasticity and load a linear relationship, so it is difficult to use a single function representation; In the application of can do with approximate estimate of sex.

4. Bearing stiffness will also be shaft and the influence of the bearing, the fit tolerance to choose carefully; Matching bearing group will be the stiffness of the effect of load.

 
5. The number of the influence of the rigidity of roller bearing more than the influence of size. The same percentage increase the number of roller bearing stiffness to improve more than increase the size of the bearing improve bearing stiffness. For this reason, precision rolling bearing to increase the number of roller to improve the stiffness.



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