MIL-DTL-27426C
For External Rings
Ring deflection, degrees
Mean groove radius, in.
Allowable working stress, psi
Ring cling to groove bottom
Ring modulus of elasticity, psi
Ring radial wall, in
φ = 114.6 Rg
σ
-
C1
M
E
(1+C 1) Dn
M
T1
Ring free
Mean ring
neutral
material
diameter, in.
thickness,
in.
Mean groove dia., in.
Max. ring free I. D. in.
C1 = C - G
G
Dn = G + E and Rg =
C
2
(For the above equations, use the calculated value of φ if φ is below 18°.
If φ is
equal to or greater than 18 °, use 18°.)
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