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Most programs
use numbers to identify bearings. Some use letters instead. By FAR the
most common convention is to begin the numbering (or lettering) on the
non-drive end of the "driver" component (motor, turbine, etc.). That bearing
will be denoted as Position "1", or Position "A".
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Following the
drive train in a logical manner, the next bearing reached will be Position
"2" or "B". That bearing will be found at the drive end of the motor or
turbine (the driver component).
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Continuing to
logically follow the drive train, the next bearing reached will be Position
"3" or "C". This bearing will almost certainly be on the "driven" component.
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With a typical
4-bearing machine, the last bearing reached would be Position "4" or "D".
The image below
shows a typical 4-bearing, belt driven fan with the bearings numbered. |
