As you can see in the photo, I am attempting to bring the orings out to the
correct size. After a few days on the rack, they don't seem to want to
succumb to my wishes. They are still just the same size as when they
arrived. What should I do? Leave them on there a few more days? Gradually
add to the circumference until they eventually give in to my will? Perhaps
warm them up to say around 150F?

These things are really tough. I suppose if I over stretched them, they
would shrink back a bit. At present, they are certainly holding their own.
So I guess I have no choice but to keeping stretching them. They will
eventually lose the battle, no matter what.

Ed Carver

Looks good to me.

I hope you miked the section diameter. Should be no more than .093"
If the section diameter is larger than .093" you are in for trouble
regardless  of how they are labeled.

So far as I can find out, Creavey is the only supplier shipping the right
section size. That includes Tracy Crook. I have been saying this for years and
it is all over the web site but some people are still not getting
the message.

http://www.rotaryeng.net/seals.html

http://www.rotaryeng.net/TEFLON_COATED_O_RINGS_IMG4.GIF

http://www.rotaryeng.net/O-ring-size2.html


Paul Lamar