2217K+H317 SKF Bearing

   Eric Bearing Limited is one of reputable bearing distributor located in beautiful and prosperous free-trade port city-Hongkong. We devote to be famous bearing distributor, keep good relationship with world famous authorised bearing manufacturer or distributor, such as Sweden SKF bearings, Germany FAG/INA bearings, Japan NSK bearings, Japan NTN bearings, Japan IKO bearings, Japan KOYO bearings, and USA TIMKEN bearings, Meanwhile, combine many of our bearing distributors in China to integrate their bearing resources and inventory, to provide customers with long-term, stable supply of goods and development support, make customer management benefit was improved and operation stability, to achieve and establish "win-win" development goals with every customer.

SKF 6305-2RS1 * bearing

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.

According to the rigidity comparison of the preload method, the comparison of the positioning preload and the constant pressure preload is as follows.

(1) When the preload is equal, the positioning preload is effective to increase the rigidity of the bearing, that is, the displacement of the positioning preload is the smallest for the load of the SKF imported bearing.

(2) Positioning preload. During operation, the difference in axial elongation caused by the temperature difference between the shaft and the housing, the difference in radial thermal expansion caused by the temperature difference between the inner ring and the outer ring, and the deformation caused by the load change the preload. In the case of positioning preload, the upper weight of the spring due to the expansion and contraction of the shaft is small, so the change of the preload can be ignored. It can be seen from this that the general positioning preload is suitable for the purpose of improving rigidity, and the constant pressure preload is suitable for high-speed rotation, and the axial vibration needs to be prevented, and the horizontal shaft uses a thrust bearing.

Click here to buy QJ307N2 SKF Bearing.

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.

According to the rigidity comparison of the preload method, the comparison of the positioning preload and the constant pressure preload is as follows.

(1) When the preload is equal, the positioning preload is effective to increase the rigidity of the bearing, that is, the displacement of the positioning preload is the smallest for the load of the SKF imported bearing.

(2) Positioning preload. During operation, the difference in axial elongation caused by the temperature difference between the shaft and the housing, the difference in radial thermal expansion caused by the temperature difference between the inner ring and the outer ring, and the deformation caused by the load change the preload. In the case of positioning preload, the upper weight of the spring due to the expansion and contraction of the shaft is small, so the change of the preload can be ignored. It can be seen from this that the general positioning preload is suitable for the purpose of improving rigidity, and the constant pressure preload is suitable for high-speed rotation, and the axial vibration needs to be prevented, and the horizontal shaft uses a thrust bearing.