O Ring Cross Section Formula

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. The o ring may be used in static applications or in dynamic applications where there is relative motion between. 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.

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Cross section diameter mm calculate results reset calculator generate printable document results.

O ring cross section formula.

An o ring also known as a packing or a toric joint is a mechanical gasket in the shape of a torus. O ring sealing careful consideration must be given to the size of the o ring in relation to the size of the glandular space into which the o ring is being installed. O ring installed stretch groove diameter o ring id o ring id general rule is 0 5. In the uk o ring sizes are specified by the british standard bs and each ring size has a related bs number.

Until now o ring standards have left a gap between the 1 8 and 3 16 nominal cross sections. Recommendations are based on available technical information and are offered as suggestions only any reliance placed on such information by the user is strictly at the user s risk. Excessive stretch can overstress material thin cross section and reduces squeeze cross section reduction due to stretch about half of the id stretch. For recommended o ring c s squeeze values please refer to page 11 12.

The difference between the original o ring cross section and the final o ring cross section once installed is known as the compression squeeze. The o ring must be compressed by a predetermined amount and this compression determines the o ring cross section diameter. 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. Info results at installation min.

O ring gland clearance gap size. The measurements are either in inches or in millimeters. In a dynamic situation. The o ring calculator tool is intended to form the basis of an o ring installation and assist with selection of o ring and hardware dimensions.

For example if your o ring s cross sectional diameter is 1 25 inches and its gland depth is 1 20 inches subtract 1 20 from 1 25 to determine that the o ring is able to squeeze out a total of 05 inches. Find your o ring s squeeze amount in inches by subtracting the gland depth from cross sectional diameter with a calculator. An o ring sizing cone how to measure o ring dimensions. Nominal cross section o rings.

By selecting it to be slightly less than the groove s inner diameter the o ring will stretch and hug the groove. O ring sizes are specified by the inside diameter outside diameter od and the diameter of the cross section thickness. Info o ring compression info free. The o ring inner diameter is typically chosen to be close to the groove s inner diameter.

Info o ring compression info free groove volume o ring inner diameter stretch o ring outer diameter upsetting info results at service min. Please contact us if you are looking for a size not shown in the 5 32 group. O ring application pressure vs.