Source for large, thin o-rings?

karim · Post by **karim** » Sun Feb 05, 2012 9:23 pm

I'm nearly done with my first model of the year: a 1:1 scale plasma grenade.
There are a couple of seams that I'd like to cheat with o-rings but I'm not sure where to find o-rings with the rather specific dimensions.

I need one at ~2.8—2.9" inner diameter, and another at ~2.1—2.2", with a ring thickness of no more than 1/16"

So.... any ideas where I could get my hands on o-rings like this?

G-man · Post by **G-man** » Sun Feb 05, 2012 9:44 pm

Harbor freight, or maybe an automotive store.

George

Stu Pidasso · Post by **Stu Pidasso** » Sun Feb 05, 2012 10:00 pm

This may sound crazy, but try a girl's hair tie.

Kylwell · Post by **Kylwell** » Sun Feb 05, 2012 11:26 pm

2in diameter o ring that's 1/16 thick... I'd check an auto parts store. Possibly a large full service camera store. Found this if it helps http://www.allorings.com/size_cross_ref ... framed.htm

DaveVan · Post by **DaveVan** » Sun Feb 05, 2012 11:32 pm

Google 'small parts inc' They have 100's of sizes....I got some I used as 1/6 scale bike tires.

Rocketeer · Post by **Rocketeer** » Mon Feb 06, 2012 9:31 am

It may help to know what sizes you're looking for. Looking at the spec for o-ring sizes (NAS1611), it appears you want a size -040 (2.864 inside diameter, 0.070 cross-section and a size 034 (2.114 ID, 0.070 cross-section).

karim · Post by **karim** » Mon Feb 06, 2012 7:34 pm

Helpful stuff. Thanks everyone. I knew you guys would be able to help.

kenlilly106 · Post by **kenlilly106** » Mon Feb 06, 2012 8:38 pm

I consult the source of all things industrial, the McMaster-Carr catalog

http://www.mcmaster.com/#o-rings/=g4yhnh

Multiple material choices to boot!

Ken