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Feeler Gauge Calibration - What tolerance is used for calibrating feeler gauges?

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John Predmore

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#2
Commercial measuring devices are often calibrated by comparing to the manufacturer's specification.
For a feeler gauge, you might find tolerances on the manufacturer's website, such as
Thickness Gages Series 950,184.

The technician performing calibration should check edges and surfaces under magnification for wear or damage, and check the thickness at various points around the perimeter.
 

dwperron

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#3
In case you cannot find the published tolerances for your set(s) here is a generic set of tolerances used by the Navy for their calibrations:

1549978581934.png
1549978581934.png
 
#4
I wish to open back this thread. Is calibration required for Feeler Gauge?
The thing is my manager wants me to sent the feeler gauge for calibration and i searched the web and finally found this one.
Is it really required. My boss want certification of calibration for the thing and our internal calibration didn't do feeler gauge.

P/S: out of topic a bit but i know feeler gauge need to be maintained by wiping with oily clothes but can the oil be substitute with cooking oil?
I used balm previously but that not the method i can put inside my procedure right?
 

Ron Rompen

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#5
Just a couple of observations/thoughts on this thread:

1) Calibration tolerance: It is YOUR choice as to what the calibration tolerance of any gauge is. Be prepared to justify your decision to an auditor or (more importantly) to your customer
2) Sent out for calibration: Why not do it in house? Presuming you have a properly calibrated micrometer which has appropriate accuracy and resolution, there is no reason that you can't perform the calibration yourself. However, if you use the feeler gauges to assess part quality, then you DO have to calibrate them by some method.
3) Maintenance: Don't know if cooking oil would substitute for 'oil', however the intent of the oil is (as far as I understand) to inhibit rust formation on the surfaces. To accomplish this, you can use whatever you choose (including balm) and add it to your procedure. Again, be prepared to justify your decision to an auditor or your customer.
 
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