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About the preload method: the positioning preload is the relative position of the opposite SKF imported bearing in the axial direction, which will not change during use. Here can be an example:

(1) A method of tightening a combined bearing whose width difference or axial clearance has been adjusted in advance for preloading.

(2) Use adjusted size gaskets and shims to give the bearing preload.

(3) The method used after tightening the screw and nut that can adjust the axial clearance. In this case, in order to obtain an appropriate amount of preload, it is necessary to measure the starting friction torque and adjust it.

The so-called constant pressure preload is a method that uses coil springs and disc springs to give the bearings an appropriate preload. In use, even if the relative position of the bearing changes, preload method. In use, even if the relative position that will go out changes, the preload can be roughly kept constant.

The preload line diagram of SKF imported bearings after constant pressure preload. The rigidity of the preload spring is usually very small compared with the rigidity of the bearing. Therefore, the spring displacement line is approximately parallel to the horizontal axis. Therefore, the constant pressure preload The rigidity of the loaded single bearing is approximately equal to the rigidity of the single bearing that has been preloaded with an axial load. Comparison of rigidity of imported SKF bearings and bearing monomers after positioning preload and constant pressure preload.