Thread whirling neutralizes many of the issues encountered with single-point threading. The process is used primarily by medical manufacturers to produce bone screws with deep threads on Swiss turning centers. The CoroMill 325 uses a differential pitch insert layout. Rather than being spaced evenly apart, inserts in the pocket are positioned at varied locations, eliminating chatter. The inserts feature sharp edges and a hard composition, resulting in improved part quality and tool life. <a href="http://www.sandvik.coromant.com/us/new-window.php" target="_blank">Sandvik Coromant</a>
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