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the air guage machine has a spindle type guage as we have go guages for plu go and no go guage, that spindle is being inserted into the hole required to measure its ID and ovality.
that spindle has passage to pass air through it alaonge its axis and at the end that passage divides into two opening alonge its diameter
when air is passed thorugh the spindle( gauge) it passes though the spindle and get out throgh these two openings
now if the spindle ( guage ) is inserted into the hole, it quases a drop in the pressure which is sensed by the pressure gauge mounted on the air guage machine, and that is converted into the dial guage in microns and v get redings in microns :)
There are several systems of converting the back pressure in to a display measure, like diaphragms, transducers etc which have their own errors, calibration etc and all these together make the measurement system and we see complicated result.
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∙ 12y ago
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