What is the formula of rim and face coupling alignment?

Answer 1

Angular Misalignment:

Front Foot = (TIR x B)/A

Rear Foot = (TIR x B)/A

Parallel Misalignment:

All Feet = (TIR + Bar Sag)/2

Note:

• Positive values mean adding height (shims); negative mean subtracting height (removing shims).

• TIR = Total indicator runout (the reading on the dial indicator)

• A = The diameter of the circle the indicator makes on the coupling face

• B = Distance between the coupling being measured and the center of the bolt hole on the front foot of the machine being measured.

• C = Distance between the coupling being measured and the center of the bolt hole on the rear foot of the machine being measured.