Need help in finding metric O rings

[Mech5656]

Hello All,

I need to buy below O-rings for a project and I can’t find a supplier to buy them. Can you check these sizes/specs and let me know if I am missing something? What is so special about these O-rings?

350 x 5.7mm spliced and vulcanized EPDM 80 durometer o-ring

160mm x 5.7mm spliced and vulcanized EPDM 80 durometer o-ring

530mm x 5.7mm spliced and vulcanized EPDM 80 durometer o-ring

507mm x 5.7mm spliced and vulcanized EPDM 80 durometer o-ring

 

[robertib]

It could be one of 2 options

They can't supply the hardness you are asking for - you could ask what hardness they can supply

They can't supply the section.

There is one 'standard' size o-ring that could be used. Instead of 160mm, you could try to ask for a 159.30 (Size reference G160).

 

[Mech5656]

Thanks Robertib. Is 80 durometer O-ring not common? What about the bigger O-rings? Are they totally out of range? Can O-ring stock cord be supplied and we can cut and glue the o-ring? Is that reliable?

 

[IRstuff]

Have you talked to McMaster Carr?

TTFN (ta ta for now)
I can do absolutely anything. I'm an expert!

https://www.youtube.com/watch?v=BKorP55Aqvg

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[3DDave]

It appears that EPDM in any form at 80 durometer is not common.

Where did the 80 durometer requirement come from?

 

[Jboggs]

Where did you get those specs? They strike me as very non-standard.
Try Metric and Multistandard Components -

https://www.metricmcc.com/.

 

[robyengIT]

custom made O-ring

 

[TheTick]

Where did you come up with these sizes and specs? Not from a readily available catalog, apparently.

 

[EdStainless]

Since they are all 5.7mm you could buy cord stock and make them.
Build a small jig so that you get exact miter cuts.
And a way to hold them aligned when you glue them.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, consulting work welcomed

 

[Jboggs]

I would hesitate to give the OP any advice about how to "make" custom o-rings without a better understanding of the application. Is it static or dynamic? Speed and direction? Pressure range? Media? Temperature? Critical application?

 

[robyengIT]

much better to vulcanize them

 

[Jboggs]

Or change the dimensions of the related part features so a standard o-ring will work.