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Is there a lower limit to the gland surface finish for static O-rings, gaseous system? View All
"O-rings" article by "The Engineer" on 10-23-06

surface finish table lists 0.41-0.81 micro-meters for static gaseous systems. What is the drawback of using a smoother surface finish lower than 0.41?

9 years ago - 5 months left to answer. - 1 response - Report Abuse
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There is no specific limit to the lowest surface roughness you can use on for sealing O-rings. The disadvantage to a higher quality surface finish than necessary is cost. Note - dynamic seals have a better surface finish in general when compared to static seals.

The limits given would indicate that you do not get any improved performance by improving your finish.

If you have a lower quality finish you either get more wear or a lower quality seal.

Niel Leon

9 years ago


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