FED-STD-791D
C = C1 - C 2
where:
C = change in cylinder diameter.
C1 = original cylinder bore diameter.
C2 = final cylinder bore diameter.
P = P1 - P2
where:
P = change in piston diameter.
P1 = original piston diameter.
P2 = final piston diameter.
7.2 Change in base and lip diameter of rubber cups.
B = B2 - B1
where:
B = change in rubber cup base diameter.
B1 = original base diameter.
B
B2 = final base diameter.
B
L = L2 - L1
where:
L = change in rubber cup lip diameter.
L1 = original lip diameter.
L2 = final lip diameter.
7.3 Lip diameter interference set.
-
LDIS = L1 L2 * 100
L1 - C1
where:
LDIS = lip diameter interference set percentage.
L1 = original lip diameter of rubber cup.
L2 = final lip diameter of rubber cup.
C1 = original cylinder bore diameter.
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