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"&lt;p&gt;Designing hole-making tools is a game of compromises, says Goran Melin, drilling product manager at Seco Carboloy. 'Where you gain in one area, you must pay somewhere else,' he says. The trade-offs usually include tool life, accuracy and stability. Tool designers are constantly juggling these variables to find the best solution.&lt;/p&gt;"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mmsonline.com/articles/inside-the-mind-of-the-drill-designer>