Clear Versus Dark Cutting Oil: Know the Difference

The choice between clear or dark cutting oil depends on your threading machine's rpm rating (revolutions per minute). Simply put, dark-cutting oil is for high-speed (machine) threading; clear-cutting oil is for low-speed (hand) threading. Before diving into the important differences between clear and dark cutting oils, we must understand what cutting oil is and its uses.  What is Cutting Oil? 

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