Precautions and positioning requirements for the use of Spherical Rod End Bearing

- Apr 01, 2019-

The inner ring of a Spherical Rod End Bearing can be axially positioned by a shoulder, a nut or a retaining ring. The rod end joint bearing mounted on the threaded rod or in the extension tube should be passed through an additional nut or rod end on the rod. The external thread on the joint bearing welding rod is fixed. The lock nut should be tightened against the rod end joint housing or the support surface of the tube.


Precautions when using spherical rod end bearings


1. After the bearing is pressed into the bearing, it should be flexible and unobstructed. If the obvious rotation is not flexible, it means that the size of the shaft is too large and the tolerance is lowered. If the bearing is pressed into the shaft and turned by hand, there is a clear "sand" feeling, which may be that the tolerance of the shaft is too large or the roundness of the shaft is not good. Therefore, it is necessary to control the roundness when controlling the tolerance of the shaft and the bearing chamber. At present, many domestic manufacturers only control the tolerance and do not control the roundness.


2. The way the bearing is assembled, because the bearing is a high-precision product, such as improper assembly, it is easy to damage the bearing channel, resulting in bearing damage. The bearing should have a special mold during assembly. It can't be beaten at will. When pressing the shaft, it can only be subjected to small force. When pressing the large circle, it can only be subjected to large force. Air pressure or hydraulic pressure is required for assembly. The upper and lower molds should be outside the horizontal state during press fitting. If the tilting occurs, the bearing channel will be damaged due to the damage of the bearing.


3. In the prevention of the assembly of foreign objects, the bearing is easy to move the iron filings generated during the dynamic balance into the bearing when it is mounted on the rotor. Therefore, it is better to balance the load before loading the bearing. Some manufacturers have some oil or grease to lubricate the bearing chamber during assembly. However, it is often difficult for the operator to control the amount. If the oil or grease accumulates in the bearing chamber, the bearing is very rotating. Easy to enter the inside of the bearing along the shaft. It is best not to apply oil or grease to the bearing chamber. If it is not painted, it must be controlled not to accumulate in the bearing chamber.