Use of rolling bearing all kinds of mechanical equipment, instruments such as market strictly on performance requirements for NSK bearing the required conditions, performance is also becoming more diverse. In order to numerous from structure, size, choose the most suitable bearing, need from all kinds of perspective. In the choice of bearing, general, considered as a shaft bearing arrangement, installation, remove the ease of degree, bearing allows space, size and bearing marketability, roughly decided to bearing structure. Second, the comparative study of the use of bearing side of all kinds of mechanical design life and bearing the various durable limits, side decided to bearing size. In the choice of bearing, often leaned the fatigue life of only consider bearing, the grease of aging by happened life, wear away, grease noise also need to study fully. However, according to different purposes, the necessary choice of the precision, clearance, keep frame structure, grease, etc requirements, particularly the bearing design. But, choose bearing and no certain order, rules, priority should be considered for bearing is required conditions, performance, most associated issues, particularly the actual.

The configuration of import bearings of the bearing arrangement on the influence of the rigidity of the bearing is very big also, generally speaking, to the heart of the type to thrust ball bearing and roller bearings, in pairs to use their big end relatively up-to-date (namely the pressure line form pressure cone pointed outward) configuration, so configuration of subversion of the moment of bearing capacity, the temperature changes in the amount of the preloaded with less change.
For only the stamping outermost needle bearing, because the outer wall is thin, had better not use hammer beat installation, use should be pressed into the press. Because hammer knock, uneven pressure, easy to make needle bearing outer produce local deformation.

"Cross fixed" refers to a kind of bearing configuration, each one of these to make NSK bearing shaft one-way positioning, and the opposite direction. This combination is mainly used for short axis. All can at least bear a direction axial load of the radial are applicable, including deep groove and Angle contact ball bearing, tapered roller bearing and NJ type cylindrical roller bearing, use Angle contact ball bearing or tapered roller bearings, on some occasions, must exert the load.
Axis is based on two bearing in radial and axial for support, will be on one side of the bearing is called the fixed end bearings, it bear radial and axial two kind of load, the fixed axis and bearing box of the relative axial displacement between the role. Will the other side is called the freedom, only bear radial load, axial can relative motion.

The fixed end bearing must at the same time and axis and bearing box is fixed, more suitable to the bearing is can withstand the composite radial load, for example, deep groove ball bearings, spherical roller bearing and double row or match diagonal contact ball bearing or tapered roller bearings. Bear radial load of pure radial combination, such as internal and external circle with the raised edge by cylindrical roller bearing and deep groove ball bearing or four-point contact ball bearing or two-way thrust bearing combination, also can be used as the fixed end bearing. At this time, the second bearing offer two-way axial orientation, but must be installed with bearing box remains a certain radial interval. The freedom in shaft bearings for thermal expansion, length change, bearings inside won't happen extrusion. Axial displacement can happen at bearing internal, can also occur NSK bearing circle and housing.




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