Date: 2013-08-20

How to verify clearance of FAG bearings and rotation flexibility

FAG bearings are precision components, it used to be careful. Regardless of how you use high-performance bearings, if used incorrectly, you will not get the expected performance. We have four aspects to this issue, how to inspection and clearance of the bearing and rotate flexibility.
From the structure and size of the bearing, FAG bearing structure and the size different, its rotation flexibility should have different requirements. Such as separate centripetal ball bearing, and separate centripetal thrust ball bearing, due to scroll body and rings Zhijian of contact area small, these bearing rotating Shi on comparison light, and double column centripetal spherical bearing and thrust roll child bearing, due to scroll body and roll road of contact area larger, patrons ring of weight also smaller, in check its rotating flexibility Shi, although plus must load, but its light degree still than separate centripetal ball bearing. For oversize bearings when you rotate it, there should be no jam, no check for rotation sound General. We know that FAG bearing rotational flexibility in horizontal position check, inner ring is typically fixed (or handheld), hand-rotating outer ring, check whether there is abnormal noise when the rotation of the bearing and blocking.
From the long duration of FAG bearings to rotate, bearing long duration when you rotate, stop slow, flexibility is good. Conversely, short rotation time, stopped suddenly, flexibility is good.
From the radial clearance of bearings with regard to new, to measure of FAG bearings radial clearance is not easy, because measuring force displacing the bearing rings and rolling elements themselves and have an elastic contact deformation, deformation is a multi-factors of measurement error, and it contacts with the measurement of force, State, and location of rolling about.
FAG bearings rotate flexible ways, for bearings with tapered bore, added the following methods check the bearing rotation flexibility available, specific actions are as follows: the bearings with a tapered bore onto the mandrel until the radial preload and a certain, in this pre-loading, when the one ring rotates listen rolling should be rotating. If rolling sliding rather than turns, it means that the size of ring geometry defects or excessive scrolling is not uniform, bearing rotation flexibility was poor.
These four areas are very basic point of view, because of the different use of the environment and how it is used, the situation is more complex.

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