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The following chart gives typical gland dimensions for common o-ring sizes within reciprocating / dynamic applications. Please consult with your o-ring manufacturer for custom or application specific requirements.
To use this document, first identify if you have a rod or piston application gland requirement. From the chart below, identify your nominal o-ring desired size, then your o-ring gland depth requirements. After you have verified your nominal o-ring size functionality within your assembly, specify / design your o-ring groove/gland.
Piston / Rod O-Ring Gland / Groove Installation
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For male / piston application :
GD = FDmax + 2Lmax
For female / rod application:
GD = FDmax - 2Lmax
Where:
GD = Gland diameter
PD = Pipe Diameter (adjacent to gland)
FD = Fit Diameter (cylinder which o-ring mates against)
C = Clearance
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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.
R = Internal Radius |
Typical Reciprocating / Dynamic O-Ring Static Seal Glands / Grooves
See "Gland / Groove Detail" above
O-Ring Nominal Diameter |
Actual Diameter
(1)
|
Gland Depth
(L)
|
Compression Actual |
Compression % |
Gland / Groove Width
(W)
|
Groove Radius
(R)
|
Total Runout
Maximum
(TR) |
Total Runout
Maximum
GD relative to FD |
1/16 |
.070± .003 |
.055
to
.057 |
|
15
to
25 |
.093
to
.089 |
.005
to
.015
|
.0010 |
.002 |
3/32 |
.103± .003 |
.088
to
.090 |
.010
to
.018 |
10
to
17 |
.140
to
.145 |
.005
to
.015
|
.0010 |
.002 |
1/8 |
|
.121
to
.123 |
.012
to
.022 |
9
to
16 |
.187
to
.192 |
.010
to
.025
|
.0015 |
.003 |
3/16 |
|
.185
to
.188 |
.017
to
.030 |
8
to
14 |
|
.020
to
.035 |
.002 |
.004 |
1/4 |
|
.237
to
.240 |
.029
to
.044 |
11
to
16 |
.375
to
.380 |
.020
to
.035
|
.0025 |
.005 |
(1) May vary between different o-ring manufacturers
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