Ben
invest in a calculator, and get some practice using it
and make dwgs to scale, may help you to 'see' what's going on
to compress an o-ring 30%, what is being done ?
- it's cross-sectional diameter, relative to the longitudinal axis, is being reduced by 30% (or 40 if you prefer)
[this will tend to slightly increase it's diameter, Roark describes the deformation calcs]
- is it's volume being affected ? nooo
[not at the stress levels involved]
- so if the o-ring's volume was 70% of the groove's (or 60 if you prefer), has it changed ? nooo
so what then is the cross-sectional area of a 1/16" o-ring ?
so what then is the groove volume ?
now you 'know' that the depth of the o-ring is 70% of 1/16",
[find out the tolerances, and use the lower 'limit']
what then will groove's width be ?
this is pretty basic arithmetic, eh ?
now why cut a groove that small if such is not necessary ?
BTW, the bearer of bad tidings here; your design is quite seriously flawed
- Cathar's thread identifies the salient considerations,
which you are ignoring in favor of what you like the appearance of
build it, test it - many to go
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