89.pdf - A-PDF Merger DEMO Purchase from www.A-PDF.com to remove the watermark CNC Applications History and Terminology Background Definitions(Chapter 1

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Background & Definitions (Chapter 1) Requirements for a skilled machinist ° Serve a 4 year apprenticeship including classes in algebra, trigonometry, print reading, and drafting along with 8,000 hours of on-the-job-training. ° The machinist must purchase several thousand dollars worth of precision tools. ° Machinists often make a lower hourly wage than other skilled trades such as electricians and plumbers. ° Production operations often require a very skilled person to perform the same operations over and over which most machinists find boring.
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Background & Definitions (continued) During the 1930’s and 1940’s, there was much labor unrest between machinists and management at large companies. Work stoppages and strikes angered management. At the same time, World War II increased the complexity of parts required for common products. The most complicated product at the time was the jet aircraft which required large quantities of complex, high- precision components.
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