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Old 10-31-2002, 01:24 PM
gdaley gdaley is offline
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Join Date: Feb 2001
Location: SE PA
Posts: 63
General question - O-ring size selection

I'm faced with finding an o-ring "off the shelf" for a particular application where the part is no longer available from the manufacturer. In this application, the o-ring sits in a circular groove that is rectangular in cross section and mates against a flush surface. Is there a rule of thumb to follow in selecting the cross-sectional diameter of the o-ring to provide a sufficient size to fill the groove with an excess that gives adequate compression to assure a good seal?

As always, thanks in advance.
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