10X Cleaner
This one is easy; the
contaminant sensitivit y of
machine components has been
reasonably well-established.
is includes bearings, gearing,
pumps, valves and even engines.
A test procedure, known as the
accelerated life test (A LT),
is followed to determine a
machine's tolerance to particle
contamination. During the test,
the machine or component is
subjected (exposed) to known
and controlled levels of contam-
inants to measure changes in
service life.
Of course, there are a lot of
factors related to particles that
inf luence service life. These
include particle size, number,
hardness and angularity. We
must also consider machine and
operating factors: loads, speeds,
work ing clearance, meta l-
lurg y/surface hardness and
contact geometry.
With rare exception, the
life-extension from improved
fluid cleanliness is dispropor-
tionate, meaning that one
unit of improved cleanliness
translates to multiple units of
extended life.
Using a hydraulic piston
pump as an example, if the
fluid is 10 times cleaner, the
pump may last 50 times longer
(see the nomograph in Figure 1).
e disproportionality works in
your favor if the oil is cleaner (5
to 1) but works against you if it's
dirtier (1 to 5). Hydraulic fluid
that is twice as dirty reduces
service life down to 20% or less.
https://www.machinery-
lubrication.com/Read/95/
machine-life-extension
Figure A
ML
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