Bell & Gossett P81553B Impeller Static Balancing Instructions - Manual

STEP NO. 2 — After impeller has been cut to size make cer-
tain that all burrs are removed. Insert mandril into impeller
and place on balancing ways. Spin the impeller lightly and
REVISION A
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Impeller Static
Balancing Instructions
STEP NO. 1— When cutting the impeller O.D. it is suggested
that the tail stock of the lathe be utilized at act as a stabilizer
STEP NO. 3 — Place impeller in chunk on drill table. Align
flat mill cutting tool at center of imbalance point on the im-
peller wall. If the unbalanced condition is quite pronounced
make the first cut about 1/64" deep and 2" to the left and right
of the center point. This is done by moving the handle at-
tached to drill table back and forth. A continuous balance
check should be made during this operation. The impeller is
properly balanced when it remains stationary on the balance
ways on any point of it's 360° periphery.
allow to turn until it stops rocking. Make a chalk mark at the
bottom center of the impeller. This is the unbalanced point.
for holding the impeller in the chuck — Note the use of a flat
block of wood between impeller and blunt tall stock.
INSTRUCTION MANUAL
P81553B