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Microfinish conversion - Micrometers (?) to microinches?


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microfinish conversion, microinches, micrometers
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  Post Number #1  
Old 17th May 2004, 11:37 AM
Proud Liberal's Avatar
Proud Liberal

 
 
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Please Help! Microfinish conversion - Micrometers (?) to microinches?

Sorry if this is the wrong forum for this question.

What's the converion from micrometers (?) to microinches? The specification is 1.27 to 3.31 in metric.

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  Post Number #2  
Old 17th May 2004, 12:24 PM
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Quote:
In Reply to Parent Post by Proud Liberal

Sorry if this is the wrong forum for this question.

What's the converion from micrometers (?) to microinches? The specification is 1.27 to 3.31 in metric.
1 microinch = 0.0254 micrometer
In microinch your specification would be roughly 50/130 (there are rounding errors!)

Last edited by Bill Ryan - 2007; 17th May 2004 at 12:26 PM.
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  Post Number #3  
Old 17th May 2004, 12:25 PM
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Quote:
In Reply to Parent Post by Proud Liberal

Sorry if this is the wrong forum for this question.

What's the converion from micrometers (?) to microinches? The specification is 1.27 to 3.31 in metric.
There are 25.4 mm/inch, so I think there are 0.0254 micrometer per microinch.
  Post Number #4  
Old 18th May 2004, 08:36 AM
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We measure plating thicknesses in microinches and microns. I usually convert by:

microinches * .0254 = microns

microns / .0254 = microinches

Also, 1 micron = roughly 40u" but you get a small rounding error. It's just convenient for quick checks sometimes without a calculator...

Jerry
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