Efficient Plant Nov./Dec 2019 - 20

feature | predictive maintenance

Bearing PdM

Increases
Uptime

Predictive-maintenance strategies will move
your operation out of fire-fighting mode,
improving overall system performance.
Justin Lesley & Scott Moeller, Motion Industries Inc.

WHEN WE VISIT manufacturing operations, we see a mixture of
reliability strategies for bearings ranging from run-to-failure, which is no
strategy at all, to time-based preventive-maintenance routes. The lack of
a reliability program leads to maintenance teams working reactively to
correct problems after an asset has reached a critical performance level
and caused a failure. With this fire-fighting approach, a frozen bearing on a 500-hp
motor can cause extended equipment downtime, along with thousands of dollars
of repair and replacement costs. Depending on length of downtime and product
involved, a single frozen bearing can also cause many thousands of dollars in
missed-opportunity costs from lost production time. Adding to all of this are safety
concerns that escalate as workers scramble to get production up and running again.
In contrast, a preventive-maintenance (PM) approach keeps equipment in
optimal running condition by following a regular maintenance schedule. Inspec-

20

| EFFICIENTPLANTMAG.COM

Vibration analysis alerted personnel to textbook fluting
with this motor bearing, installed in a vertical turbine
pump that supplies drinking water to a local municipality.
The problem was discovered in time to avoid unpredicted
downtime. Photo: Motion Industries Canada
Inset. Predictive-maintenance systems include libraries
of detailed information about thousands of bearings and
assemblies, including vendor specifications, known failure causes, and the type of inspection technology used
to identify a problem.

NOV/DEC 2019


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Efficient Plant Nov./Dec 2019

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