FREE ANGLE OF MISALIGNMENT
The free angle of misalignment (qf) of a bearing is the maximum angle between the inner race and outer race axes freely allowed by the bearing. If a bearing is misaligned such that this angle is exceeded, then damage and premature failure can occur.
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The free angle of misalignment (qf)
of a bearing is the maximum angle between the inner race and
outer race axes freely allowed by the bearing. If a bearing
is misaligned such that this angle is exceeded, then damage
and premature failure can occur.
(dp
>> Dw)
Misalignment during assembly is a common cause of bearing noise,
increased torque, and general poor performance. The free angle
of misalignment that a small bearing can tolerate is typically
less than 1°.
Bearing Misalignment
- Locating shoulders on mating components
must be parallel to bearing raceway faces.
- Shaft and housing bores must be concentric.
This is particularly true when more than 2 bearings share
a common component. For example, if a third bearing is added
to the above arrangement, the resulting assembly has almost
no tolerance for misalignment of the bearing outer ring.
The free angle of misalignment (qf)
of a bearing is the maximum angle between the inner race and
outer race axes freely allowed by the bearing. If a bearing
is misaligned such that this angle is exceeded, then damage
and premature failure can occur.
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