Articles by Hill Cox

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Gage Block Calibration

Consider these steps before going through the process.

Gage blocks are the most used physical representation of length available to companies requiring the highest order of precision for their work.


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Practical Checks on Measurements

Is there a way to improve calibration—without ramping up costs?
Many companies have their equipment calibrated on a regular basis and believe all will be well until they are calibrated again.
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Identify or Qualify?

Everything doesn’t need to be calibrated

In metrology we have similar benign bits of hardware that can create havoc if misapplied, but in the grand scheme of things rarely are.


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How to Get Accurate Calibration Prices

Prevent problems and price changes by following these tips.

Many calibration customers become frustrated with their calibration sources because of price changes after they’ve sent a purchase order and the gages to the lab.


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How Long Are Calibration Reports Valid?

Consider these factors in looking at a calibration report.

This question is rarely, if ever, asked but assumptions regarding the length of time involved regularly pop up, especially when measurement disputes are the situation into which such assumptions are injected.


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The ‘PC’ Disease

It’s time to understand the symptoms and the cure.

Just so there’s no misunderstanding, the ‘PC’ referred to in the title is not about political correctness, a very bad disease in its own right. In this case it’s about panic calibration.


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Comparing Calibration Laboratories

Conventional wisdom is usually a safe bet, but not always.

On the surface, it would seem there is little to be done when looking at calibration services.


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Rejecting Gages

Here’s how to handle rejection.

Every gage manufacturer receives a number of rejects in the course of a year—it goes with the territory.


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Sorting Out Thread Gaging

Check exactly what you are measuring.

Recent discussions with a customer over problems with threaded parts reminded me just how complicated some measurements can become. 


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Pass, Fail or Uncertain?

Despite.

Last year at this time I wrote a column in which I criticized the practice of having calibration labs make acceptance decisions in their reports.


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Multimedia

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Charles J. Hellier has been active in the technology of nondestructive testing and related quality and inspection fields since 1957. Here he talks with Quality's managing editor, Michelle Bangert, about the importance of training.
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Quality Magazine

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2015 January

Check out the January 2015 edition of Quality Magazine for features!

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The Skills Gap

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