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Adjustment
— Having obtained the net misalignment, the amount by which the equipment
must be moved can now be calculated.
To determine:
S — amount of movement (in plan) or the thickness of shim (in elevation) required.
Obtain:
D — coupling face diameter in inches (or indicator button circle)
L — distance between front and rear holddown bolts (inches)
M — net misalignment in inches
And:
Divide L, the bolt distance, by D, the coupling diameter. Multiply the result by M, the net
misalignment.
Example: Face diameter 5 in. (D). Distance between front and rear holddown bolts 30 in.
(L). Net misalignment in elevation .012 in. (M).
30 divided by 5 is 6
6 multiplied by .012 is .072 in.
S = .072 in.
S =
L
x M
D
Click here for Figure 40 — Alignment Formula