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Piston fit with o rings

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Phil1965:
Hi I am using o rings for the first time as a piston ring on a steam engine. The cylinders and piston are in gunmetal  with a 1” bore. The drawing suggests a 1”old x1/8 profile. Any guidance what the ideal groove width and diameter would be gratefully appreciated
Thank you in advance

Jasonb:
0.132" deep groove x 0.160 wide

Phil1965:
Thankyou Jason. Short and simple solution 😀

Vixen:

--- Quote from: Jasonb on March 19, 2025, 04:29:05 PM ---0.132" deep groove x 0.160 wide

--- End quote ---

Jason,

A 0.132" deep groove for the quoted 1/8" profile O ring, looks a bit too deep to me.       How did you arrive at 0.132"  ?   

But what do I know about anything?

Mike

crueby:
A lot depends on the size o ring, there are lots of different cross section diameters. I use the viton ones that are 1/16" cross section.

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