Dormer Pramet C428 16.0mm HSS-E-Powder Metal Alcrona Primax Flatted Shank Multi-Flute Roughing (HRA) Standard Length End Mill DIN 844 K

The Dormer Pramet C428 16.0 mm end mill is a short-series roughing tool designed for demanding metal-removal tasks. Built for shoulder milling, slot milling, and ramping, it delivers efficient material removal and reliable wear resistance across a range of tough alloys.

• Diameter: 16.0 mm
• Flutes: 4-flute roughing design
• Length of Cut: 32 mm
• Overall Length: 92 mm
• Reach with Neck Relief: 43.5 mm
• Shank: Weldon, 16 mm
• Material & Coating: Powder-metallurgical HSS-E with Alcrona Primax coating
• Profile: HRA asymmetrical fine pitch
• Helix Angle: 35°
• Rake Angle: 12°
• DIN Standard: 844 K
• Applications: Shoulder milling, slot milling, ramping
• Suitable Materials: Alloy steel, stainless steel, cast iron, copper and copper alloys, high-temperature alloys

Designed for robust performance, the C428 combines a 4-flute geometry with a fine-pitch HRA profile to balance aggressive material removal with controlled, stable cuts. The powder-metallurgical HSS-E substrate paired with the Alcrona Primax coating reduces wear and extends tool life in challenging metals while maintaining a smooth finish on milled surfaces. The 35° helix aids chip evacuation in dense or gummy materials, and the 12° rake angle supports efficient cutting action in shoulder and slot milling operations.