X20 system modules • Other functions • X20CM4810
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X20 system User's Manual 3.10
PeakHighFrequency
CrestFactorHighFrequency
Vdi3832KtHighFrequency
PeakRaw
CrestFactorRaw
SkewnessRaw
KurtosisRaw
Vdi3832KtRaw
RmsHighFrequency
RmsAccRaw
RmsVelRaw
ISO10816
RmsAccEnvelope
RmsVelEnvelope
FrequencyBandRmsVelEnvelope
FrequencyBandRmsAccEnvelope
FrequencyBandRmsAccRaw
FrequencyBandRmsVelRaw
FrequencyBandNoiseAccEnvelope
FrequencyBandNoiseVelEnvelope
FrequencyBandNoiseAccRaw
FrequencyBandNoiseVelRaw
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Potential failures
Characteristic values
Suitability of the respective
characteristic values to
monitor the potential failures:
Very good
Good
Less good
Not assessed
Figure 696: Frequency of failure indicators on roller bearings
Typical cage and roller element damage
Cage damage
Cage frequencies often occur in electric motors, especially where bearings with increased bearing play are used.
If this is not used, oscillation of the cage often occurs, which is evidenced by increased running noise.
Roller element damage
Roller element damage without outer or inner ring damage is extremely rare. The individual indicators are therefore
listed for example purposes only.
If the roller element is damaged, an impact occurs either on the inner ring, outer ring, or both. Roller element
damage can therefore be detected by the roll-over frequency or double the roll-over frequency. For this reason, the
harmonic should be included in the characteristic value calculation where possible to detect roller element damage.
For the failure mode, see "Typical outer and inner ring damage" on page 2123
Summary of Contents for X20 System
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