O Ring Cross Section Selection

Nominal cross section o rings.

O ring cross section selection. The o ring may be used in static applications or in dynamic applications where there is relative motion between. An o ring is a circular cross section ring molded from rubber figure 1 1. The actual calculation for the cross section needed in an o ring varies depending on whether it will be used in a dynamic or static application. The seal assembly consists of an elastomer o ring and a gland.

The difference between the original o ring cross section and the final o ring cross section once installed is known as the compression squeeze. Once the o ring s cross section diameter and inner diameter have been calculated specific o rings can be selected from the as 568a standard if the desired o ring is not available in this standard then manufacturer catalogs can be consulted for a larger selection. Machining specifications. Recommendations on application design and material selection are based upon available technical data and are offered as suggestions only.

An o ring also known as a packing or a toric joint is a mechanical gasket in the shape of a torus. Standard metric sizes for o rings are defined by international standard iso 3601 1 2002. Inside diameters cross sections tolerances and size identification code. An o ring seal is used to prevent the loss of a fl uid or gas.

Technical handbook o rings operating conditions the practical selection of a seal compound depends on an adequate definition of the operating conditions. On o ring drive belts and their application will be found in o ring applications section iii. Please contact us if you are looking for a size not shown in the 5 32 group. Until now o ring standards have left a gap between the 1 8 and 3 16 nominal cross sections.

1 2 what is an o ring seal. It is a loop of elastomer with a round cross section designed to be seated in a groove and compressed during assembly between two or more parts creating a seal at the interface. In a dynamic situation. That standard groups metric sizes into two series g and a.

Manufacturers of encapsulated o rings and industrial gaskets. In approximate order of application importance medium. Fluid power systems o rings part 1. In de signing this new group of o rings we left spacing in the part numbers to allow us to add additional sizes should they be required.

O ring cross section and o ring groove design data from row inc. Be gained by increasing the squeeze on the o ring cross section.