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March - April 2021
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machinerylubrication.com 28
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March - April 2021
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machinerylubrication.com
The Bathtub Curve Applied
To Gearbox Oil Analysis
What happens in the aging failure zone?
Jorge Alarcon | Bureau Veritas Global
" The high
solubility
of varnish
at different
lubricant
temperatures
makes varnish
contamination
a complicated
problem to
tackle. "
OIL ANALYSIS
I n rec ent ye a r s, t he
term "industrial revolu-
tion" has taken on new
meaning, and many of
t hose involved in t he
world of maintenance have taken
notice of this transformation. e
Fourth Industrial Revolution, char-
acterized by ongoing automation
of traditional manufacturing and
industrial practices, is yielding
significant environmental and finan-
cial benefits, and it's clear machine
efficiency will continue to progress
even further over the next decade.
Start up /
Commissioning
End of Life Normal Operation
Early Mortality Random Failures
Overall Failure Rate
Time
Failure Rate
Root Causes
Stage of
Service
Life
Aging Failures
Wear-Out
Figure 1: Bathtub Curve as a function of component wear
Learn More:
noria.com/ascend/
