O-Ring Installation Design and Specification Static Cylindrical Installations

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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

Male and Female O-Ring Gland / Groove Installation

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

O-Ring Gland / Groove Detail

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

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

.015
to
.023

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
.0010
.002
1/8
.138± .004
.111
to
.113
.022
to
.032
16
to
23
.003
to
.006
.187
to
.192
.010
to
.025
.0015
.003
3/16
.210± .005
.170
to
.173
.032
to
.045
15
to
21

.003
to
.006

.281
to
.286
.020
to
.035
.0020
.004
1/4
.275± .006
.226
to
.229
.040
to
.055
15
to
20
.004
to
.007
.375
to
.380
.020
to
.035
.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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