Date: 2013-08-20

Questions about the bearing axial displacement and stiffness

Has the very big relations bearing axial displacement appearance and bearing installation, the use of the process will cause displacement of the situation is very small. If no special circumstances or incorrect operation method, bearing the general would not occur displacement. So we must be circumspect when installed.
Axial movement of the bearing shaft bearing. For example, the thermal expansion occurs in the shaft, the bearing will not be too much to bear the additional load. Bearing needle roller bearings and N type cylindrical roller bearing the most appropriate. NJ cylindrical roller bearings ( these models supply bearing ), can also be used as a floating end bearing.
There is the bearing stiffness problem, in the previous article, I have given you said bearing stiffness problem. But bearing brands are not the same, encountered the problem of bearing stiffness is not the same. Now I want to tell you about the stiffness in the use process problem.
The stiffness of the bearing is bearing elastic deformation degree under the load. This deformation is small, can be neglected. However, in some applications, such as machine tool spindle bearing or gear bearing, stiffness is very important. Between shaft and bearing will have a point in the following error; the load shaft deflection and bearing seat hole is not processed into the same height, or two distant, bearing box, bearing.
Or tapered roller bearings and roller bearings, roller and raceway contact point of contact between the ball bearing high rigidity ratio. Can be applied to the bearings to increase rigidity pretightening force. Rigid bearings, such as deep groove ball bearings and cylindrical roller bearings, can't afford any mistakes, or can only afford a very small angle error, but will be subject to additional load.
The problem for axial displacement and stiffness of the bearing, you need to pay attention to the problem. Not because of their temporary effect caused by damage of the bearing, there is not the same brand bearings, the stiffness of the bearing has the very big difference, must pay attention to this point.

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