Start Increments Accuracy Format Print table < Smaller Values Larger Values > Microinches Microns; 0 µin: 0
001 Fractional: 1/64 Fractional: 1/32 Fractional: 1/16 Fractional: 1/8 Fractional: 1/4 Fractional: 1/2 NO
125 3
01 microinch: 0
Surface Finish conversion chart or roughness between selected industry standard units
A popular term used with sur-face finish measurement, microinch specifies an average value for surface finish
Here is a table shows comparisons of different surface roughness scales
cabinc
10 microinch to MICRONS = 0
How to Convert Micron to Microinch
25 µin: 26 µ: 1023
400
However, it is not uncommon in machine shops for the term surface finish to be used to describe only
1 N1 C SURFACE FINISH CROSS REFERENCE CHART Common USA name
How to Convert Microinch to Millimeter
Example: convert 15 microinch to in: 15 microinch = 15 × 1
RMS = Root Mean Square in microinches
6
0254 micron (µ)
8 Ground, EDM 32 Machined, extremely fine finish 1
47 52 1
Other methods such as burnishing, bearingizing, and ballizing provide smooth surfaces without removing any material from the work surface
What is a 250 surface finish? “250” typically refers to a surface finish in microinches, Ra values are measured in micrometers (μm), which are also referred to as microns
ASTM STD Ra Microinch Japanese Standard 2000 50 7875 200 N12 1000 25 3940 100 N11 500 12
in microinches and microns/micrometers): Note that the surface roughness conversions are approximate
286: 4 Microinches to Micrometers = 0
The millimetre is a unit of length in the metric system, equivalent to one thousandth of a metre (the SI base unit of length)
2μm
The prefix "micro" indicates that the measurement is one millionth of an inch, making it a highly precise unit
86 0