Coordination and clearance of the FAG Bearings FAG bearings, both according to high-precision bearing requirements, but also at high temperature bearing requirements, so in considering the coordination and clearance to take into account the following two points:
(1) rose from room temperature to high temperature when the size change and hardness change;
(2) high speed centrifugal force caused by the force system change and shape change.
In short, high-speed, high temperature conditions, from the choice of co-ordination and clearance should strive to maintain the accuracy and performance of the FAG Bearings, this is difficult.
In order to ensure that the bearings installed raceway deformation is small, the interference fit amount of interference can not be made too large, high-speed centrifugal force and high temperature thermal expansion or offset with the surface of the pressure. With the surface relaxation, the amount of interference must be calculated carefully consider these two factors, the amount of interference under normal temperature and speed for FAG bearings may be invalid.
If the calculation results of this contradiction is too large (usually only in this case) only in the ultra-high-speed, only to take the ring lubrication and hydrostatic lubrication and dual lubrication measures, and this program may cause bearing dmn value of breakthrough 3 million mark.
Considering the FAG bearing clearance should not only consider the above factors, but also to consider the thermal elongation of the axis of clearance required bearing in working condition, that have the best clearance in the working temperature, which kinds of clearance, including the outer ring ball groove center precise bits of state formation. FAG Bearings strive to reduce the relative sliding and internal friction, it is best not to use the inner and outer rings along the axial relative displacement method to adjust the ball bearing clearance.
In the amount of interference with the FAG bearing clearance should be noted that the material under high temperature to become soft and easily deformed, and the temperature change caused some permanent deformation of the possibility of several times from room temperature to high temperature.
FAG bearing on the relevant parts of the host
FAG bearing requirements of the bearing where the rotation system has been precision balancing, shaft and housing bore to install the bearing parts should be higher than the general requirements for dimensional accuracy and geometrical accuracy, concentricity and shoulder block bore or journal verticality, and the time to consider these issues, the same must be noted that the high-speed bearing operation factors and high temperature factors.
Shaft bearing systems require both high rigidity, and quality requirements as light as possible, to overcome this contradiction can be taken such as to reduce the surface roughness and surface hardening measures to improve the bearing stiffness, the hollow shaft to reduce the quality of the system.


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