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post #15 of Old 03-01-2011
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Get, borrow, etc, a "dial indicator" (micrometer) and take measurement of 'shaft run-out' while (hand) rotating the shaft - with tight gland and with loose gland. Use the instrument on the shaft and also ON the stuffing box.

examples: Fowler FOW72-520-199 Dial Indicator and Magnetic Base Set - Black
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