重视铝合金加工的切削锋利度。45 度的螺旋角实现了良好的切屑排出性能。
Sharpness oriented for aluminum machining. Good chip evacuation by 45 degrees helix angle.
较小的切屑尺寸比较大的切屑更被期望，因为这样的切屑使机械加工操作简化而且有利于从刀具工件接触面的更有效的热量排出。
Smaller chip sizes are more desired because such chips simplify the machining operation and facilitate more effective heat removal from the tool work piece interface than larger chips.
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