On Sun, 24 Nov 2013 08:37:21 -0500, "Mike Marlow"
wrote:

Jim Wilkins wrote:
"Mike Marlow" wrote in message
...
Gunner Asch wrote:
Ayup...aerospace requires 50 millions or half 10ths all the time.
Which is damned hard to do with machines that hold +/- 2 tenths

One might think it is impossible to do with repeatability and
assurance.

So - I am curious - what is it that aerospace requires that is 50
"millions"? I worked in that space for a while and I never saw any
tolerances like that - but that does not say much. I believe that
even the space shuttle does not demand tolerances that close - but I
really do not know.
-Mike-


What is the tolerance for hydraulic spool valves?

You forced me to look that one up. A quick look seems to indicate that
tolerances are around 5 ten thousanths of an inch.

..0005?

5 tenths in other words. And those are common as dirt.


__
"A human being should be able to change a diaper, plan an invasion,
butcher a hog, conn a ship, design a building, write a sonnet,
balance accounts, build a wall, set a bone, comfort the dying,
take orders, give orders, cooperate, act alone, solve equations,
analyze a new problem, pitch manure, program a computer,
cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects."
- Heinlein

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