Roughers for Space Age Exotic Materials - Series 101 Series 101 Roughing End Mill for Space Age Exotic Materials. View Speeds and Feeds page. Features: Designed Specifically for applications in materials such as titanium and nickel based/high temperature alloys (inconel, rene, wasploy, etc.) Reduces tool pressure and generates less heat while allowing heavier cuts at increased feed rates. 40 Degree Helix 4 Flute (1" End Mill has 6 Flutes) Fine Pitch Geometry Corner Radius standard to strengthen end teeth Available in nARCo® (Part Number ends in 5), AlTiN (Part Number ends in 4) and TiCN (Part Number ends in 2) coatings