BTC End Mill Catalog Basic Information Speeds and Feeds Table Common Formulas for Milling General Coating Information for Our Tooling Conventional End Mills – 30° Helix Angle for Conventional Milling 4 Flute Conventional End Mills for Steel and Cast Iron2 Flute End Mills for Soft Materials High-Performance End Mills High Feed Milling End Mills 4 Flute High Feed Milling End Mills5 Flute High Feed Milling End Mills Compression Routers Chamfer Mills Special Application Carbide End Mills and Drills