The dovetail guide surface of a rotating bearing, inner hole and outer ring of CNC lathe is in rolling contact with the rolling body, so the running track is dark, and the running track attached to the dovetail guide surface is not abnormal, so that the load standard can be known. Therefore, when the bearing is removed, please strictly pay attention to and observe the running track of the dovetail guide surface. If the running trajectory is carefully observed, it is often known that only the pressure axial load, the larger radial load, the torque load, or the extreme stiffness is uneven on the bearing box.

Can check whether the bearing is added to the unexpected load and installation error is not great, and even become a clue to blame for the bearing damage. The running trajectories of deep groove ball bearings manufactured under different load conditions are shown.

(a) is the ordinary running track that only bears the axial load when the inner hole rotates.

The running trajectory shown in (c) ~ (h) has a very bad effect on the bearing, and most of the service life is shorter. Roller bearings bearings run the same way.

(1) It should be the cylindrical roller bearing used when the inner ring rotates the load properly coupled with the outer ring running track after the axial load.

(j) is the running track with relative skew between the inner hole and the outer ring and relatively large shaft deflection value. The running track of the dovetail guide surface forms an inlet and outlet in the load ring with a depth in the vertical direction. The running track is inclined and double row tapered roller bearings make the inner hole rotate.

(K) indicates the running track of the outer ring after the pressure axial load only. L indicates the trajectory under radial load only. When the relative skew of the inner ring and the outer ring is large and only bears the axial load, the orbit deviation is 180 in the two column orbit plane. Position (m).

7. Bearing damage and prevention measures turn over bearings, if there is no wrong choice and can be used properly, before the service life of bearings, but with a long time, in such a case, the damage state is out. On the other hand, there are unexpected early damage, and the initial damage cannot be applied. As the main cause of the initial damage, the use and wetting are not enough, so there are dirty things entering, the bearing assembly deviation and shaft deflection value is large, the scientific research on the shaft and bearing bag is insufficient, etc.

It is fair to say that these factors overlap with each other more often. Therefore, on the premise of in-depth understanding of bearing application equipment, application range and bearing peripheral structure, if you can understand the situation before and after the safety accident, and then understand according to the bearing damage condition and a variety of reasons, you can prevent similar accidents from appearing again.

Show the examples of bearing damage and the reasons and preventive measures, please be used as the material for inferring the causes of bearing damage.