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Tool Talk Discussion Forum

Micrometer reading to inches

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Glen2

10-06-2005 07:01:06




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Some of you math whizz"s, how do you convert a micrometer reading to inches. I am trying to find the micrometer reading for 5/16" Thanks in advance.




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oldman1151

10-06-2005 14:04:02




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 Re: Micrometer reading to inches in reply to Glen2, 10-06-2005 07:01:06  
The charts are handy but if you do not have one just divide the nominator (top number) by the denominator (bottom number). You are asking about 5/16", 16 divided by 5 equals .3125 (5/16 = .3125) , Another example, 3/8": 3 divided by 8 equals = .375 (3/8" = .375) Piece of cake.



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oldman1151

10-06-2005 14:13:52




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 Re: Micrometer reading to inches in reply to oldman1151, 10-06-2005 14:04:02  
Meant to say: 5 divided by 16 = .3125
The charts are handy but if you do not have one just divide the nominator (top number) by the denominator (bottom number). You are asking about 5/16", 16 divided by 5 equals .3125 (5/16 = .3125) , Another example, 3/8": 3 divided by 8 equals = .375 (3/8" = .375) Piece of cake.



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petetx

10-06-2005 14:01:08




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 Re: Micrometer reading to inches in reply to Glen2, 10-06-2005 07:01:06  
old machinist
each 1/16th equals .0625 thus 5x .0625 =0.3125
in reading a inch micrometer that is properly adjusted each full revolution of the barrel = 25 thousandths of an inch. alwayys remember the lightest feel is the most acurate (in other words it is not a c-clamp) used to tell my apprentices this.



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Charles (in GA)

10-06-2005 13:29:54




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 Re: Micrometer reading to inches in reply to Glen2, 10-06-2005 07:01:06  
You could buy a wall chart, the Fastenal dealer here gave me one.

MSC has them on "sale" right now. order number WC06516801 $3.28 ea. In the October sale catalog.
Regualr stock number is BY06516801 and is $3.28.

Decimal Equivalent Wall Chart
Fraction, Wire Gage, Letter & Metric Sizes
� Color coded for easy reading
� 22″W x 32″H. Two hole punched top and bottom for
easy wall mounting
� Wipes clean with damp cloth
� Durable - .015 gage white styrene plastic. Will not tear
� Decimal equivalents for fractional, letter, number and
metric sizes from .35 to 1″
� English metric length conversion
� Metric English tap-drill reference
� English tap-drill reference
� Straight pipe tap-drill reference
� Taper pipe tap-drill reference
� Tap clearance reference
� Shipping weight 11⁄2 Lbs.

Charles

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Irv Slagter

10-06-2005 10:14:15




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 Re: Micrometer reading to inches in reply to Glen2, 10-06-2005 07:01:06  
5/16" is .3125



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TimV

10-06-2005 09:49:29




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 Re: Micrometer reading to inches in reply to Glen2, 10-06-2005 07:01:06  
Glen2: Bill's way will always work, but for commonly used fractions, you can print and use the URL below. If you don't like this one, Google up "fraction to decimal conversion" or "fraction conversion chart" and you'll find a few hundred more to pick from.

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Bob

10-06-2005 10:11:06




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 Re: Micrometer reading to inches in reply to TimV, 10-06-2005 09:49:29  
Or, if you're REALLY lazy, (like me) punch up the link below:



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Bob

10-06-2005 11:39:03




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 Re: Micrometer reading to inches in reply to Bob, 10-06-2005 10:11:06  
OOOPPPS... you said "mictometer", I posted "metric".



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Bill in WI

10-06-2005 07:08:34




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 Re: Micrometer reading to inches in reply to Glen2, 10-06-2005 07:01:06  
Use the numbers in the fraction. In this case, 5/16. Formula is 5 divided by 16 = 0.3125". Or for a lazy way put the mic on a drill bit shank of the size you want to know and you'll be plenty close.



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