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The following chart gives typical gland dimensions for common o-ring sizes. Please consult with your o-ring manufacturer for custom or application specific requirements.
To use this document, first identify if you have a female or male o-ring gland requirement. From the chart below, identify your nominal or-ring desired size, then your o-ring gland depth and runnout requirements. After you have verified your nominal o-ring size functionality within your assembly, specify / design your o-ring groove/gland. Male and Female O-Ring Gland / Groove Installation
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Female O-Ring Gland
GD max = FD min + 2L max
or
2L max = GD min - PD min
Male O-Ring Gland
GD min = FD max - 2L max
or
2L = PD max - GD min
Where:
GD = Gland Diameter
PD = Pipe Diameter (adjacent to gland)
FD = Fit Diameter (cylinder which o-ring mates against)
C = Clearance
C = PD - FD for Female Gland Cylinders
C = FD - PD For Male Gland Cylinders |
O-Ring Gland / Groove Detail
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Where:
W = Width at bottom surface intersection of groove
L = Gland Depth, distance from mating surface.
D = Actual depth of groove in part containing gland / groove
C = Radial clearance between mating parts.
R = Radius
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Typical O-Ring Static Seal Glands / Grooves
See "Gland / Groove Detail" above
O-Ring Nominal Diameter |
Actual Diameter |
Gland Depth
(L)
|
Compression Actual |
Compression % |
Diametric Clearance
(C)
|
Gland / Groove Width
(W)
|
Groove Radius
(R)
|
Total Runout Maximum (TR)
(1) |
Total Runout Maximum
GD relative to FD
(2) |
1/16 |
.070 ± .003 |
.050
to
.052
|
|
22
to
32
|
.002
to
.005
|
.093
to
.098
|
.005
to
.015
|
.0010 |
.002 |
3/32 |
.103± .003 |
.081
to
.083
|
.017
to
.025
|
17
to
24
|
.002
to
.005
|
.140
to
.145
|
.005
to
.015
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.0010 |
.002 |
1/8 |
|
.111
to
.113
|
.022
to
.032
|
16
to
23
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.003
to
.006
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.187
to
.192
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.010
to
.025
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.0015 |
.003 |
3/16 |
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.170
to
.173
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.032
to
.045
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15
to
21
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|
.281
to
.286
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.020
to
.035 |
.0020 |
.004 |
1/4 |
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.226
to
.229
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.040
to
.055
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15
to
20
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.004
to
.007
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.375
to
.380
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.020
to
.035
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.0025 |
.005 |
(1) This is the total runout (TR) between the o-ring gland / groove and the associated cylindrical feature.
(2) This is the total runnout between contacting cylindrical surface FD and the o-ring gland diametral contacting surface.
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