MS3215C
fPN s sTE2 or
50
P s sTE2
f50N
Where:
P = Allowable thrust load exerted by adjacent part (Pounds)
f = Coefficient of friction
s = Working stress of ring under maximum expansion
T = Ring thickness (Inches)
E = Listed "E" dimension of ring on page 2
N = Neutral ring diameter (Inches) = free diameter plus 1½ E dimension
In such cases where differential rotation occurs, the calculation should be based on the MAXIMUM
possible value of the coefficient of friction
(f) Impact capacity of ring or groove wall =
IR = PT - For the ring (Inch Pounds) Abutting components to have sharp corners
2
IG = Pd - For the groove (Inch Pounds)
2
Where
P = Allowable thrust load of ring or groove (Pounds) T = Ring thickness (Inches)
IG = Impact capacity of groove wall (Inch Pounds)
d = Groove depth (Inches)
IR = Impact capacity of ring (Inch Pounds)
(g) Load capacity with the retained part radiused or chamfered =
The allowable thrust loads, when computed from the formulas on page 4, will not be affected when the (E) rings are used against parts having corner radii or chamfers up to listed maximum dimensions.
4. Changes from previous issue. Marginal notations are not used in this revision to identify changes with respect to the previous issue due to the extent of the changes.
MILITARY INTEREST
Custodians: Preparing activity: Army - AR DLA - IS
Navy - OS
Air Force - 99 (Project 5325-2011-002)
Review Activity: Army - MI
NOTE: The activities listed above were interested in this document as of the date of this document. Since organizations and responsibilities can change, you should verify the currency of the information above using the ASSIST Online database at https://assist.daps.dla.mil
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