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

On 19 Apr 2006 19:36:40 -0700, "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.

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 ***

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

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 Design Inc.
| Cupertino, Ca. 95014

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

Weyland wrote:
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


Shore-A it looks like.

--
Gary A. Gorgen | "From ideas to PRODUCTS"
| Tunxis Design Inc.
| Cupertino, Ca. 95014

shore -d

c.henry wrote:
shore -d

?!?!?!?

No offense, but I find it kind of hard to believe a
Buna-N O-ring that I can pinch pretty well between
my nails is rated almost as hard as a construction hard-hat.

.... or am I missing/not understanding something...?

Best,

Weyland

my mistake , it is shore a .. see
http://o-rings.globalspec.com/LearnM.../Seals/O_rings

did not see the other post till today or i would have double checked