Its inside diameter id and its cross sectional diameter cs see figure 1.
O ring groove diameter tolerance.
Understanding o ring sizes and tolerances standard sizes the standard sizes used by parco and the other major o ring manufacturers in the united states are defined by aerospace standard as568b aerospace size standard.
Our tolerances are only meant to serve as a guide.
Two dimensions describe the size of an o ring.
O ring tolerances for cross section and inside diameter the o ring tolerances outlined in the charts below reference general purpose o rings and x rings.
If you have a custom o ring size that does not appear on this chart contact us directly and we can help you size.
The best o rings are useless without the right groove design which becomes increasingly important the more demanding the.
Secondly the o ring is at its smallest cross section tolerance limit and the gland is at its largest size tolerance limit.
Dimensional tolerances for all metric o rings offered by global o ring and seal are in accordance with iso 3601 1b.
An o ring can perform sealing by means of squeeze under low pressure conditions.
The o ring inner diameter id should also stretch approximately 5 over your groove or gland.
Metric o ring groove dimensions are listed for the most common metric cross sections with and without backup rings.
Metric o ring groove designs vary greatly and choosing the right one for your application is important for maximum o ring performance.
O ring metric groove design pdf seal design company info.
Then click the global size to find possible matching items in our store.
This metric o ring groove design reference guide will help you find the right radius back up pressure and other o ring dimensions for basic applications.
O ring groove design overview.
You can select your tolerance range in the store.
O ring groove design guides offer default dimensional guidance on the most basic o ring groove design applications.
These will produce the highest compression and lowest compression percentages.
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Based on the cross section cs of your o ring you will choose the corresponding o ring groove depth and o ring groove width dimensions.
An o ring is contained in a gland and forced to flow into the surface imperfections of the glands and any clearance gaps available to it.
Find the right o ring tolerance for your application and easily order online today from the world s largest o ring inventory network.
Explore o ring groove design guides for face seal flange dovetail flange x ring and other o rings.
