O-Ring Gland Calculator

How to Use the Gland Calculator

O-ring seal configurations are categorized as either axial or radial. Radial seals have squeeze applied to the inside and outside diameters and typically consist of a piston or a rod. Axial seals have squeeze applied to the top and bottom of the O-ring cross-section and the applications are defined as having internal or external pressure. Input your application dimensions below to see the calculated results and recommendations. Some standard sizes are not recommended for dynamic applications due to the possibility of spiral failure occurring in the larger diameter sizes of the smaller cross-section o-rings.

clear fields

Sizing Selection

  Nominal +/- Tolerance
Gland (recommended) Nominal + Tolerance - Tolerance  
Bore Diameter (A) in
Piston Diameter (B) in
Groove Diameter (C) in
Groove Width (G) in
Rod Diameter (E) in
Bore Diameter (D) in
Groove Diameter (F) in
Groove Width (G) in
Results Minimum Nominal Maximum  
Squeeze % (10 - 30)
Squeeze in
Stretch % (1 - 5)
Diametral Clearance in
Volume Fill   % (85 Max)
Radial Seal Gland Dimensions

Sizing Selection

  Nominal +/- Tolerance
Gland (recommended) Nominal + Tolerance - Tolerance  
Inside Diameter (B) in
Outside Diameter (A) in
Groove Width (G) in
Gland Depth (H) in
Results Minimum Nominal Maximum  
Squeeze % (10% to 40%)
Squeeze in
Volume Fill % (90% Max)
O-ring OD Interference in
Outside Diameter (ref) (A) in
Inside Diameter (ref) (B) in
Internal Pressure External Pressure

Note: The advice given is believed to be accurate and reliable, however, it is the responsibility of the user to determine its safety and suitability. The proposed design should be thoroughly tested for each specific application.

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This tool is meant to be used as a professional guide only. Because no two situations or installations are the same, these comments, suggestions, and recommendations are necessarily general and should not be relied upon by any purchaser without independent verification based on the particular installation or use. We strongly recommend that the seal you select be rigorously tested in the actual application prior to production use.

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