Articles by Hill Cox

Other Dimensions: Elementary, My Dear Watson

The problems encountered with screw threads are legendary. The most common one occurs when the gages do what they are supposed to do: reject bad parts or accept good parts.
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Other Dimensions: Dumbing Down Calibration Reports

The last time I checked, most folks have gages calibrated to determine what sort of dimensional state they are in. A properly presented calibration report will tell you if there is a possibility that some bad work was shipped because of a worn gage. Now, I know that wouldn’t happen at your company, but it does at some. Alternatively, the information provided could be a warning that this could happen in the not-too-distant future.
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Other Dimensions: The Phantom Feature

I stand in awe of the lowly screw thread because of the engineering that goes into it. A cursory look at a typical screw thread standard will show you what I mean. Despite their innocent appearance, screw threads are difficult to measure.
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Other Dimensions: Cost-Cutting Cowboys

The worldwide financial mess leads many to the simple fix for the bottom line: reign in costs.
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Other Dimensions: Going Once...

Whenever there’s an economic downturn two things happen: more measuring instruments get repaired when they should be replaced, and more people start going to auction sales looking for bargains.
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Other Dimensions: How Are You Going to Measure That?

Far too often manufacturers spend a lot of time designing components without this critical question being asked.
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Other Dimensions: Cut Calibration Costs

In a previous column I railed against corporate cost cutting strategies where the only element taken into consideration was the money involved. The fallout from decisions made in such isolated circumstances will not be immediately evident, while the savings will be. But when the chickens come home to roost, the costs to put things right often exceed the savings many times over.
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Other Dimensions: Calling the Shots

One of the good things about getting items calibrated is the information the process provides. The bad news is some folks don’t know how to deal with that information. Far too many buyers of calibration services only scan the reports and, in the absence of red flags, file them in case an auditor wants proof of calibration.
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Other Dimensions: Single Source Calibration

I’m surprised at some of the ideas that drift down from the loftier realms of the corporate world in the endless quest to reduce costs. In many cases, the assumption is that a philosophy that appears to work in one area of a company’s operations can be applied to all areas.
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Other Dimensions: Some Don't Like It Hot

There are two approaches to take regarding temperature changes and the effects they have on measurement. The first is to control the shop or lab environment to such an extent that, whatever temperature variations remain, they will have no significant effect. The alternative is to control and correct the key items involved-the gages and the product being measured. The simplest method for most folks is to control and correct.
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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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