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"&lt;p&gt;Each of the thousands of output axle shafts machined by American Axle&amp;amp;Manufacturing (AAM) (Detroit, Michigan) has at least six mounting holes, permitting the half shaft to be bolted securely to the flange. The proper location, depth and thread in each hole is so critical that each hole must be inspected completely-without compromising production rates of more than 200 parts per hour, per gage. Manual inspection was proving to be slow, unreliable and tedious for the operators. That's when the company's plant engineers began searching for an automated thread verification system.&lt;/p&gt;"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mmsonline.com/articles/auto-supplier-uses-system-to-gage-thread-depth-and-reduce-costs>