Inch O-Ring Stretch, Squeeze, and Fill for Male o-ring groove dimensions.
5/22/14
REQUIRED:
Find the Stretch, squeeze and o-ring groove Fill for the o-ring and groove dimensions given w/ tolerances.
GIVEN:
O-Ring body Dial. (cs):
O-Ring I.D. (id):
Plug Dia. (C):
Bore Dia. (A):
Groove Dia. (F):
Groove Width (G):
ASSUME:
A Temp. change from room temp.
Coeff. of Thermal Expansion:
Surface Temp.:
Temp at depth "q":
Reduced Cross Section:
Reduced I.D. :
SOLUTION:
Dimension Limits O-Ring:
Dimension Limits Groove Geometry:
PERCENT O-RING STRETCH (0 - 5%):
smallest o-ring
largest o-ring
Observed Reduced Dia in percent due to Stretch (0 - 3%):
Observed Reduced Dia in percent due to Stretch (3 - 25%)
This reduced diameter reduces the squeeze on assembly and may need to be accounted for.
Percent Reduced diameter (due to stretch):
(0-3% or 3-25%)
(0-3% or 3-25%)
(0-3% or 3-25%)
Reduced body diameter in radial direction due to stretch (in):
O-RING % SQUEEZE
(Mxx_d), Thickness dimension thru the o-ring; Stretched (scs), or un-stretched (cs):
Max:
Nom:
Min:
Real Radial Squeeze: (for 70 duro needs to be > .007 in.)
O-RING GROOVE % FILL (60% - 85%):
O-ring Groove Sectional Area:
Volume of Stock O-Ring:
Assume:
PRESSURE RATING
Maximum Diametrical Clearance:
Graph Interpolation (pp 3-4. fig. 3-2):