Use move bearing a variety of mechanical devices, equipment and other functions increasingly stringent market requirements, required prerequisites for rolling bearing, functions are becoming increasingly diversified. In order to be able from a large number of structures, sizes, select the most appropriate bearings, research needs from a variety of angles. When selecting bearings, in General, considered as the shaft bearing arrangement, ease of installation, Assembly, bearing the promise of market space, size, and bearing generally decisions bearing structure. Second, comparing the design life of the machinery for research use of FAG bearings and bearing a variety of endurance limit, decide to bearing size. When selecting bearings, are often partial to only consider bearing fatigue life, related by the ageing of the grease and the grease life, wear, noise, also need to be fully examined. Furthermore, according to different purposes, selecting on the precision necessary, clearance, cage structure, grease and so on request, subject to special design bearings. However, select the bearings have no order, rules, priorities should be taken into account is the premise requires for bearing, physical functions and related matters, is especially actual.
　　TIMKEN bearings of configuration bearing of configuration on bearing rigid of effect also is large, generally, for centripetal thrust type of ball bearing and roll child bearing, in into on using times take outer ring big end surface relative (that its pressure line by constitute of pressure cone Tsim to outside) of configuration, such configuration bearing anti-subversion torque of capacity large, in temperature changes Shi its adjusting have of pre-tight volume also less occurred changes.
　　Only a drawn cup needle roller bearing, because the outer wall is very thin, preferably without the Bishop beats the installation, press pressure should be used in. As Bishop beat time, pressure is not average, easily put the needle roller bearing outer ring at the local deformation.
　　"Cross-fixing" is a bearing arrangement, each of which bearing is one-way to the axis position, and in the opposite direction. This combination is mainly used for short axis. All at least able to withstand axial load in one direction of the radial bearings are suitable, including deep groove and angular contact ball bearings, tapered roller bearings and NJ-cylindrical roller bearing, angular contact ball bearings or tapered roller bearings, on certain occasions, required applying preload.
　　Axis is based on two bearings in radial and axial bearing, bearing is called a fixed-end on one side of the bearing, which accommodate both radial and axial loads, fixed relative axial displacements between shaft and housing. The other side called the free end, only take radial loads, axial can be relatively mobile.
　　Fixed-end bearing requires that is fixed with shaft and housing, relatively inexpensive INA bearings radial bearing is subjected to combined loads, for example, deep groove ball bearings, pair and double row spherical roller bearings or angular contact ball bearings or tapered roller bearings. Accommodate purely radial load radial bearing combinations, such as inner and outer rings of cylindrical roller bearings without ribs and the deep groove ball bearings or four-point contact ball bearing or combination of bi-directional thrust bearing, can also be used as locating bearings. At this point, the second provides bi-directional axial location of bearings, but necessary to install and have a certain radial distance from the bearing box. Free-end bearing shaft due to thermal expansion, changes in length, squeeze does not occur within the bearing. Axial displacement can occur inside the bearing, ring rolling bearings and bearing may also occur.



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