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How would you pronounce this?

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zjtr10

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How would you pronounce this number ?
.00002”
Two hundredths of 1 thousandth
Maybe?

4FCEAF15-2051-43AF-97D3-D383EB331FD9.png
 

benmychree

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I would call the dial reading twenty one millionths.
 

zjtr10

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Would it be correct to say that each graduation on the dial face is worth .00002” ?
 

zjtr10

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Just to add another stick in the mud please notice that the “big numbers” on the dial face have a decimal point in front of each one

So this indicator has a total scale of +/- .8× .00002” ?
 

mmcmdl

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Throw that thing away , your working my old brain way tooooo hard with all those zeros . :grin:
 

chips&more

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Just to add another stick in the mud please notice that the “big numbers” on the dial face have a decimal point in front of each one

So this indicator has a total scale of +/- .8× .00002” ?
No sorry, it would be +/- 0.0008". And nice indicator!
 

westerner

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Sorry, more like 0.000220" or 220 millionths
That is the number I came up with. Not too sure about the number, but dang sure I don't ever need to worry about hitting it:cautious:
 

zjtr10

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but dang sure I don't ever need to worry about hitting it:cautious:
[/QUOTE]

ROTFLMAO

I’m sure you’ll “hit it” on the way by.
 

darkzero

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Ah choo (sneezed near the indicator). Indicator moved, reads 20 millionths off now, out of spec, there goes that part (toss in scrap bin). :p
 

JimDawson

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I'd call that about 0.5 micron :grin:
 

higgite

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I have an easier time getting my head around each division on the dial being 0.2 tenths, rather than deal in millionths or microns or furlongs per fortnight. So, I'd call that dial reading 2.2 tenths. But, this is probably the first and last time I'll ever have to deal with it anyway. So, if someone wants to call it 22,000 100 millionths, I'm not going to argue with'em. ;)

Tom
 

ch2co

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I sure hope that you are working in a closely thermal controlled room. Just holding that thing in your hand would change the measurement by a full scale
 

Jubil

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Send it to me. I'll figger it out..

Chuck
On second thought don't send it. I looked again and my eyes went blurry and my head started to hurt. I must be allergic to accuracy. :headache:
 
Last edited:

Groundhog

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The way I read it is if each tick is .00002 (as labeled) then the first big mark would be .00010, the second would be .00020 (as the dial number shows) and the final reading would be .00022. Or 2.2 ten-thousandths, or 22 hundred-thousandths.
 

Bob Korves

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220 millionths to machinists, who do not properly use the term hundred thousandths. It is not 2.2 ten thousandths, it is .22 ten thousandths, a goofy way to articulate it (for a machinist.) That is a wonderful old indicator, Federal was one of the best brands in those days. Federal made lots of special indicators for special uses by special customers. I have a couple myself...
 

Winegrower

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I am pretty sure this indicator would never get a steady reading on anything in my shop. That is amazingly sensitive!
 

tmenyc

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Winegrower -- I'm with you. I'd have to get lower Manhattan to come to a stop first!
Tim
 

higgite

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220 millionths to machinists, who do not properly use the term hundred thousandths. It is not 2.2 ten thousandths, it is .22 ten thousandths, a goofy way to articulate it (for a machinist.) That is a wonderful old indicator, Federal was one of the best brands in those days. Federal made lots of special indicators for special uses by special customers. I have a couple myself...
Bob,

You’re right that it is 220 millionths, but you misplaced a decimal somewhere in converting it to ten thousandths. 220 millionths is 22 one hundred thousandths or 2.2 ten thousandths or 0.22 thousandths or .00022". I may be wrong to refer to it as 2.2 “tenths”, but then I'll have to plead internet ignorance. All I know about machinists’ measurements I learned off the internet, mostly this forum, and we all know the internet is never wrong. ;)

Tom
 

markba633csi

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I think of the numerals as fractions of a thou so .2 thou, .4 thou and so on.
So the total range is 1.6 thou correct?
mark
 

Bob Korves

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You’re right that it is 220 millionths, but you misplaced a decimal somewhere in converting it to ten thousandths. 220 millionths is 22 one hundred thousandths or 2.2 ten thousandths or 0.22 thousandths or .00022". I may be wrong to refer to it as 2.2 “tenths”, but then I'll have to plead internet ignorance.
Yes, 2.2 tenths would also be useful.
 
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