Plunge Milling / Roughing: CNC Secret Weapon [ Complete Guide ]
Now we need Feeds and Speeds. Our GWizard Feeds and Speeds Calculator has special features to help with Plunge Milling. Let's work through an example that shows the strengths of Plunge Milling. Suppose we are handed the task of roughing out a pocket that has 1/8″ corner radii, which dictates and endmill no larger than 1/4″ in diameter.