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4) Cycle of Measurement
The cycle of measurement of the grease steel dust concentration is related to
collection of extracted grease at the cycle of lubrication of fresh grease to the rotating
machinery.
The cycle of grease application would differ with the kind and the specifications of the
rotating machinery used, and must be determined with the condition of operation, the
table below show an example of the cycle of measurement.
Table 4 Cycle of Measurement of the Steel Dust
Kind of Rotary Machinery
Cycle of
Measurement
Low speed rotary machinery at normal temperature
3 – 6 months
Medium and high speed rotary machinery at normal
temperature
3 – 6 months
Low speed rotary machinery at high temperature
1 – 4 months
Concentration in the Grease
When an abnormal trend of the measured steel dust concentration in the grease is
detected, the cycle of measurement shorten depending on the degree of abnormality.
Also, improving the cycle of grease lubrication may reduce progress of abrasion; as a
result the countermeasure would lead to the extension of the machinery life span.
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Summary of Contents for SDM-72
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