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Posted by Weyland on April 19, 2006, 10:36 pm
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Has anyone got any idea on how this stuff
compares in hardness to o-rings of say... 70 durometer?
I don't know anything about durometers so don't
know how to compare them to the data in the tech
data sheets on the Permatex website.
Thanks,
Weyland
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Posted by on April 19, 2006, 11:03 pm
Please log in for more thread options wrote:
>Has anyone got any idea on how this stuff
>compares in hardness to o-rings of say... 70 durometer?
>
>I don't know anything about durometers so don't
>know how to compare them to the data in the tech
>data sheets on the Permatex website.
>
>Thanks,
>
>Weyland
Right stuff is pretty soft - likely closer to 30 than 70.
For 70 you will want urethane more likely than silicone
*** Posted via a free Usenet account from http://www.teranews.com ***
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Posted by Weyland on April 19, 2006, 11:37 pm
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clare wrote:
> Right stuff is pretty soft - likely closer to 30 than 70.
> For 70 you will want urethane more likely than silicone
I checked the data sheets and it looks like all the urethanes
that they (Permatex) have a temperature limit of 180 degrees.
I need something that will handle something closer to 275.
Realistically, it shouldn't ever get over 230, but you never know...
Best,
Weyland
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Posted by Gary A. Gorgen on April 20, 2006, 9:00 am
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Weyland wrote:
> Has anyone got any idea on how this stuff
> compares in hardness to o-rings of say... 70 durometer?
>
> I don't know anything about durometers so don't
> know how to compare them to the data in the tech
> data sheets on the Permatex website.
>
I just went through the durometer thing.
Not having a clue what the numbers ment.
Go to http://www.mcmaster.com
Search for foam.
select Mil-spec.
There is a chart that shows all of the durometer scales
& firmness rating.
Hope this helps.
--
Gary A. Gorgen | "From ideas to PRODUCTS"
tunxis@comcast.net | Tunxis Design Inc.
| Cupertino, Ca. 95014
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Posted by Weyland on April 20, 2006, 10:02 am
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Gary A. Gorgen wrote:
> I just went through the durometer thing.
> Not having a clue what the numbers ment.
>
> Go to http://www.mcmaster.com
> Search for foam.
> select Mil-spec.
>
> There is a chart that shows all of the durometer scales
> & firmness rating.
> Hope this helps.
Excellent~! Yes, it does indeed help. Thank you.
Now... just have to figure out *which* durometer
scale they're using for Buna-N O-rings...
Best,
Weyland
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>compares in hardness to o-rings of say... 70 durometer?
>
>I don't know anything about durometers so don't
>know how to compare them to the data in the tech
>data sheets on the Permatex website.
>
>Thanks,
>
>Weyland