New Tech Offers Improved Drilling Productivity for Steel, Cast Iron April 28, 2021 Holemaking in steel and cast iron up to one inch in diameter is one of the most widely used metalworking processes. What is driving drilling and tapping performance are advances in substrate, coatings, three-flute designs, and combination tools. Just as important are advances in coolant delivery, using different size holes and shapes to facilitate chip evacuation.
