Efficient Plant December 2017 - 34

feature | lubrication strategies

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"All Sight-Level Gauges
Aren't Created Equal"
efficientplantmag.

com/2017/03/sight-l
evel-gauges-arentcreated-equal/

"Put Portable Filter
Carts to Work"

efficientplantmag.
com/2017/05/putportable-filtercarts-work/

34

ing foundry, cement plants, or mining facilities.
Other working environments that are detrimental
to lubrication include:
S A plant that runs two or three shifts. Most
original-equipment manufacturers base their lubrication recommendations on a single-shift operation
(2,000-hr. annually). Double and triple shifts require
lubrication delivery and reservoir fill frequency to
also double and triple if line throughput is constant.
S Aggressive production schedules. Running over
design capacity will break down the lubricant much
faster, requiring a ramped-up delivery schedule.
S Multi-mode operation. Different lubrication
strategies are required for machinery that may
operate in three separate modes, e.g., full-operation
mode, standby/idle mode, and/or spare/redundant.
S Temperature extremes. Wide operating-temperature ranges dramatically affect the lubricant viscosity. Very hot conditions can make the lubricant very
"thin," causing it to lose its ability to stay in the bearing pressure, or load, zone, allowing metal-to-metal
contact to occur. Extremely cold environments make

| EFFICIENTPLANTMAG.COM

lubricants "thicken." A thick lubricant may stall out
the pump, causing the system to dramatically slow
its delivery or stop altogether. The correct viscosity
is essential in extremes that may require a complete
lubricant changeover as the seasons change.
In every case, the onus is on the end user to make
sure he/she understands and make adjustments that
compensate for the working environment. The best
strategy is to specify exact needs at the design stage.
Machine design and working environment can significantly affect how bearings are lubricated. EP

Contributing editor Ken Bannister is co-author,
with Heinz Bloch, of the book Practical Lubrication
for Industrial Facilities, 3rd Edition (The Fairmont
Press, Lilburn, GA). As managing partner and
principal consultant for Engtech Industries
Inc. (Innerkip, Ontario), he specializes in the
implementation of lubrication-effectiveness
reviews to ISO 55001 standards, asset-management
systems, and training. Contact him at kbannister@
engtechindustries.com, or telephone 519-469-9173.

DECEMBER 2017



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Table of Contents for the Digital Edition of Efficient Plant December 2017

Efficient Plant December 2017 - 1
Efficient Plant December 2017 - Cover1
Efficient Plant December 2017 - Cover2
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