[PSUBS-MAILIST] Cylinder tolerance

[James Frankland via Personal_Submersibles]

Hi All

Im getting some quotes in for some rolled cylinders.

What do people think i should ask for as the tolerance on roundness?

I believe (from memory) that the K350 plans specified "cylinder to be
within 1/8th (3.175mm) on diameter for a 3ft (914mm) shell .

im quoting for a 650mm inside diameter 10mm cylinder.

Im feeling i want to ask for 1mm on diameter.

What do you guys think?

Thanks
James
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