On Mon, 25 Nov 2013 09:42:59 -0500, "Jim Wilkins"
wrote:

"Jim Wilkins" wrote in message
...
"Lloyd E. Sponenburgh" lloydspinsidemindspring.com wrote in
message . 3.70...
"Mike Marlow" fired this volley in
:


D'Oh! Ok - guess that proves I'm not a machinist. What happened
to
the 100 thousandth though? Wouldn't half a tenth be 50 one
hundred
thousandths?

yes, but that's not common 'jargon'.

Most machinists work to somewhere between 1 and 5 tenths (of a
thousandth
of an inch). Some work to major fractions of a 'tenth' -- half,
quarter,
whatnot... and they usually express it that way, saying stuff like,
"half
a tenth".

A very few work to less, and then they mostly discuss micro-inches.
Lloyd

The downfeed on my 1940's-vintage surface grinder is graduated in
half tenths.
jsw

I wrote that wrong. The graduations are 0.0005" apart.

You were right the first time..in common practice.

Once the basic mind set is formed...getting complicated or verbose is
contraindicated. Half tenth is very commonly used.

Gunner

__
"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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