Axial Rigidity
Rigidity RA of an angular contact ball bearing is the external
axial load causing 1 micron displacement (daN/mm).
Ra of a bearing pair or set can also be defined as the ration
between the limiting axial load Pd and the bearing axial deflection
a2. Axial rigidity remains practically constant until external
load is great than off load Pd.
Axial rigidity Ra varies as contact angle and bearing preload
vary.
Preloaded bearing deflection curves are use to plot axial
rigidity and the limiting axial load as follows:
Radial rigidity
Angular contact ball bearing radial rigidity “Rr”
too, varies with contact angle and preload; unlike axial rigidity
however, radial rigidity decreases as contact angle increases
and changes markedly as a function of the ration between axial
and external loads applied to the bearing.
The radial rigidity of a back-to-back or face-to-face bearing
set can be empirically calculated as follows:
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GRW
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