In article ,
"Michael A. Terrell" wrote:

Smitty Two wrote:

Have all you respondents that are recommending sources for O-rings
really read the OP's post? He doesn't want an O-ring, he wants TWO
O-rings, of different diameters, *connected* by 3 radials, all as ONE
unit.

I'd think a decent machinist could make an aluminum mold for $150 or so,
if you can find some liquid O-ring goo to pour in there. A couple of
flat plates, a ball end mill, an entry level CNC, and you're done. Hell,
you don't even need the CNC if you know how to use a rotary table, but
it takes longer.

MIght need to spend a little time with an X-acto knife to trim the
flashing.


Gee, Smitty, if you can glue the ends of the gasket material together
o make an "O" ring, you can also glue the radials in place. At least, I
would do it for something of mine that I needed really bad. The seals
were bad on the whole house water filter when I moved into this house,
but the plastic threads on the cartridge housing were so badly worn that
the entire system was scrapped. It wasn't worth rebuilding a 20 year
old system that used VERY hard to find filter cartridges when you knew
that the hairline cracks in the clear molded plastic cartridge cover
would spread into full blown cracks and leak some day soon. I could
have even made a new cover out of some clear 4" plastic pipe I had on
hand, but why piece together a piece of worn out junk?

In your case, a wise decision. Who's to say whether the OP's equipment
*is* or *is not* worth re-gasketing? Maybe it's about to disintegrate,
and maybe a new seal would get him another 30 years of service out of it.

I've made O-rings by gluing ends together, but those were for static
applications. Wasn't the OP talking about moving parts? That might make
the "glue it together out of multiple pieces" approach a mite tenuous.
Perhaps I've misunderstood, though.

I just thought I heard some fairly high numbers thrown out by someone,
for a one-off mold that seems pretty simple to me, that's all.