Meet the Dormer Pramet C428 8.0mm HSS-E-Powder Metall Alcrona Primax Flatted Shank Multi-Flute Roughing End Mill DIN 844 K — a short-series roughing tool designed for serious metal removal in demanding milling applications. Featuring an HRA asymmetrical fine-pitch profile and four flutes, it’s built for reliable performance in alloy and tool steels, stainless steels, and other tough materials.

• Diameter: 8.0 mm
• Number of flutes: 4-flute configuration
• Length of cut (LOC): 19 mm
• Overall length: 69 mm
• Shank type: Weldon shank, 10 mm
• Shank geometry: Flatted shank for secure clamping
• Material: Powder-metallurgy HSS-E for enhanced hardness and toughness
• Coating: Alcrona Primax for improved wear resistance
• Helix angle: 35° for efficient chip formation
• Rake angle: 12° to support shoulder milling, slot milling, and ramping
• Standard: DIN 844 K
• Flute design: Multi-flute, optimized for controlled material removal
• Applications: Shoulder milling, slot milling, ramping in a range of metals
• Compatible materials: Alloy steel, tool steel, stainless steel, cast iron, copper and copper alloys, high-temperature alloys

Designed to maximize rigidity and material removal in roughing operations, this end mill leverages a robust 4-flute geometry and a flatted Weldon shank to maintain secure, precise engagement in standard tool holders. The Alcrona Primax coating reduces wear and extends tool life, while the HSS-E base material delivers a balance between hardness and toughness necessary for demanding milling environments. The 35° helix and 12° rake enable smooth chip evacuation and stable shoulder milling, slotting, and ramping across a variety of workpieces, from alloy steels to high-temperature alloys. Ideal for professional machinists seeking consistent performance and predictable tool life in roughing tasks.