Roughers for Light Alloys - Series 102 Series 102 Roughing End Mill for Light Alloys. View Speeds and Feeds page. Features: Designed for light materials like Aluminum, brass, copper, etc. as well as general purpose applications for deep slots and pockets. Reduces tool pressure and generates less heat while allowing heavier cuts at increased feed rates. 40 Degree Helix 3 Flute Corner Radius standard to strengthen end teeth Available in AlTiN (Part Number ends in 4) and ZrN (Part Number ends in 6) coatings