New O-rings for old boolit size dies

[earlmck]

My newest size die for the old Lyman 45 is something over 10 years old, and my oldest ones came from Herter's, so you know these things have been around for a while. And the last few years I have been seeing O - ring failures. I have tried getting O - rings from the hardware store but never quite hit it right and they have either been a scosh too small and leaky, or a scosh too big and get torn up on insertion.

I ordered a small selection of different sizes from "The O -ring Store" www.theoringstore.com/‎

I'm sure these were originally 1/16th inch rings so you'd think you'd want 1.6mm in a metric. But the 1.6 ers leaked a bit. The ones that seem perfect are marked as "1.78mm X 14mm" from their Buna-N 70 Duro selection. No more scavenging O - rings -- I can replace them as they fail. I'm a happy li'l camper!

[tankgunner59]

Thanks for posting, I wondered if I would be able to replace them when the time comes. Good information.

[Rich/WIS]

Needed one once and found them at IIRC Ace Hardware. Pack is made by Danco, size #35, 11/16 OD x 9/16 ID my 1/16 thick. Came ten to a pack from the plumbing section. PM sent.

NOTE: These are for the new 450 model held in by a lock ring.

[3leggedturtle]

Earl, have you tried the O-rings at NAPA meant for hydraulic fittings?

[earlmck]

Earl, have you tried the O-rings at NAPA meant for hydraulic fittings?

No I didn't try any of the auto parts stores -- just did the lazy google thing. Do you have a recommendation for NAPA O-rings?

[Smokeploe]

Another type of ring you can try is a quad ring. I have used them, I clean, wipe the sizing die and take it into a hydraulic shop and match them up. They hold better because they have four point sealing edges and are more durable?
Smokeploe

[higgins]

I used a Danco #54 - 11/16 x 9/16 x 1/16. I got mine at an Ace Hardware several years ago, may be available elsewhere too.

Edit-Well, it looks like my #54 has the same dimensions as the #35 in Post #3. Anyway, we agree on dimensions so that part is probably correct.