Dormer Pramet C428 10.0mm HSS-E-Powder Metal Alcrona Primax Flatted Shank Multi-Flute Roughing (HRA) Standard Length End Mill DIN 844 K

The Dormer Pramet C428 10.0mm HSS-E-Powder Metall Alcrona Primax Flatted Shank Multi-Flute Roughing End Mill is designed for robust roughing in a variety of metals, delivering reliable metal removal in everyday machining jobs. It’s ideal for shops performing shoulder milling, slot milling, and ramping with consistent results.

• Diameter: 10 mm
• Length of Cut: 22 mm
• Overall Length: 72 mm
• Reach with Neck Relief: 31.5 mm
• Shank: 10 mm Weldon
• Coating / Material: Powder-metallurgical HSS-E with Alcrona Primax coating
• Flutes: 4-flute configuration
• Profile: HRA asymmetrical fine pitch
• Helix / Rake: 35° helix, 12° rake angle
• Standard: DIN 844 K
• Applications: Shoulder milling, slot milling, and ramping in alloy and tool steels, stainless steel, cast iron, copper and copper alloys, and high-temperature alloys

Benefiting from a powder-metallurgical HSS-E core and the durable Alcrona Primax coating, this end mill delivers improved wear resistance and dependable performance under roughing loads. The 4-flute design balances aggressive material removal with stable chip control, while the asymmetrical HRA profile adds rigidity for demanding cuts. The 35° helix and 12° rake angle optimize chip evacuation and reduce cutting forces, helping to maintain surface quality on shoulders and slots. The neck relief on the flatted 10 mm Weldon shank minimizes rubbing during deep pocket milling and ramping, enabling deeper engagement with less vibration. Compatible with DIN 844 K tooling systems, it fits common tool holders for efficient integration into existing workflows.