Microfinish conversion - Micrometers (?) to microinches?

[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.

[Bill Ryan - 2007]

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!)

[Al Rosen]

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.

[JerryStem]

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