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Gage calibration frequency

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  • #31204

    Sankar
    Participant

    Hi,
    I do a lot of calibration of gauges in metrology. The gauges are classified as “A”,”B”,”C” types based on the tolerances and their criticality. “A” type gauges are calibrated once in 15 days, “B” type gauges are calibrated once in 25 days and “C” type gauges are calibrated once in 90 days. I have readings of calibrations of all the gauges for the past 12 or more calibration. I have a feeling that the gauges are being over calibrated. Could any one suggest a method by which the wear pattern could be analysed and the frequency of calibration to be reviewed. I am thinking of changing the frequency to 20 days, 40 days and 120 days respectively. Please suggest some methodologies to take factual decisions.
    Thanks in advance,
    Ganesh

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    #82161

    Summerfield
    Participant

    Ganesh
    Try the MSA section of AIAG manual. I guess if you can show that the gage is stable over period of time you can reduce the frequency . However I think 12 readings is too less to conclusively show that the gage is stable. you may need more data .

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