The Dormer Pramet C428 9.0mm HSS-E-Powder Metal Alcrona Primax Flatted Shank Multi-Flute Roughing End Mill is a compact, high-performance tool designed for aggressive material removal in metalworking. Built for shoulder milling, slot milling, and ramping, it delivers reliable roughing with solid rigidity and long tool life.

• Diameter: 9.0 mm
• Length of cut: 19 mm
• Overall length: 69 mm
• Shank: Flatted Weldon shank, 10 mm (DIN 844 K)
• Coating / substrate: HSS-E powder-metallurgically produced with Alcrona Primax coating
• Flutes: 4-flute configuration for efficient chip evacuation
• Profile: HRA asymmetrical fine pitch for balanced cutting action
• Helix: 35° for smooth engagement and steady cutting forces
• Rake angle: 12° to improve shoulder milling and ramping performance
• Applications: Suitable for alloy and tool steels, stainless steel, cast iron, copper and copper alloys, and high-temperature alloys

This end mill pairs a robust 10 mm Weldon shank with a precisely engineered flatted shank section, ensuring solid grip and reduced slip in high-speed milling. The Alcrona Primax coating, applied to a powder-metallurgically produced HSS-E substrate, enhances wear resistance and heat tolerance, extending tool life in demanding roughing tasks. The 4-flute geometry and 35° helix optimize chip removal and reduce cutting forces, while the 12° rake angle supports efficient metal removal during shoulder milling and ramping operations. Ideal for shops needing a reliable, versatile roughing solution that handles diverse materials with consistent performance.