Preloading of NSK bearings

Source: China Bearing Network Time: 2013-09-26

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å•¥ is called preloading of NSK bearings; we all know that it is based on different applications; NSK bearing equipment must have positive or negative working clearance. In most cases, the working clearance should be positive; that is, the bearing is During operation; there must be a residual clearance; although it may be a small clearance. There are many applications where there is a negative working clearance, that is, preloading. The importance of preloading is as follows:
The pre-tightening of the bearing is firstly to improve the rigidity or rotation accuracy of the bearing equipment; secondly, the pre-tightening can reduce the noise; improve the precision of the shaft guidance; compensate the wear and tear in the running extension life, such as the spindle bearing of the machine tool, the small of the automobile transmission shaft Gear bearings, bearings for small motors, or bearing equipment for reciprocating motion. In some applications; if the bearing does not have or accepts only a small load; and operates at high speeds; preloading should be performed on the bearing equipment; for example After the spring, etc.; in this case; the role of the pre-tightening is to supply the bearing with a minimum load; to avoid the rolling body sliding to form the bearing damage.
The bearing trading network bearing professor tells us how to pre-tighten the bearing.
Preloading is based on different bearing types; can be radial; can also be axial. For example; cylindrical roller bearings; because of the origin of the depiction; can only be applied in the radial direction; and thrust ball bearings and cylindrical rollers Thrust bearings can only be preloaded in the axial direction. Single row angular contact ball bearings and tapered roller bearings are generally axially preloaded; and generally used in the same type of bearing as back-to-back or face-to-face The deep groove ball bearings are generally also subjected to the same axial preload; in order to reach the pretensioning intention; the radial internal clearance with a larger than normal group should be used; so that the angular contact ball bearing has a greater than zero Touch angle.

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