Help with O-Ring ID

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technician - 24 Jan 2005 19:32 GMT

I am trying to replace an o-ring in an underwater camera housing. The
manufacturer is no help at all. I have found several O-ring suppliers on
the internet, but they need technical specs to place an order. I can easily
provide them with measurements, but I'm having trouble identifying the
material of the o-ring. Can anyone tell me if the color of an o-ring
denotes the material it is made of? The one I wish to replace is bright
blue in color. Is there any other way for me to identify this O-ring?

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Chuck Tribolet - 24 Jan 2005 23:45 GMT

If it's blue, it's probably silicone. You would also need to know the
durometer rating (hardness), for which you need a durometer.
McMaster-Carr has them.

But this is one of those "if you need to ask, you shouldn't be messing
about in there" questions.

>I am trying to replace an o-ring in an underwater camera housing. The
> manufacturer is no help at all. I have found several O-ring suppliers on
[quoted text clipped - 3 lines]
> denotes the material it is made of? The one I wish to replace is bright
> blue in color. Is there any other way for me to identify this O-ring?

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technician - 25 Jan 2005 15:39 GMT

Thanks Mr Tribolet,

I'm starting to think you're right. With so much equipment out there using
O-rings you'd think there would be an easier way to get them replaced. I've
spoken to a couple scuba equipment repair technicians and they seem to be in
the dark as much as any of us mortals.

Thanks for the response.

> If it's blue, it's probably silicone. You would also need to know the
> durometer rating (hardness), for which you need a durometer.
[quoted text clipped - 10 lines]
> > denotes the material it is made of? The one I wish to replace is bright
> > blue in color. Is there any other way for me to identify this O-ring?

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