A cutting lubricant is used to drill all metals except cast iron or aluminum. These metals can be drilled dry or cooled with a water-based coolant or kerosene.

Question

Quizplus · Accepted Answer

Cast iron and aluminum can be drilled without cutting lubricants because cast iron has graphite which acts as a lubricant, and aluminum can be drilled with water-based coolants or kerosene to prevent clogging.

A Cutting Lubricant Is Used to Drill All Metals Except