Dormer Pramet C428 14.0mm HSS-E-Powder Metal Alcrona Primax Flatted Shank Multi-Flute Roughing (HRA) Standard Length End Mill DIN 844 K

The Dormer Pramet C428 14.0 mm HSS-E-Powder Metal Alcrona Primax Flatted Shank Multi-Flute Roughing end mill is built for heavy-duty roughing in challenging metals. Designed for shoulder milling, slot milling, and ramping, it delivers dependable material removal with consistent geometry and long tool life.

• Diameter: 14.0 mm
• Flutes: 4-flute configuration for efficient chip evacuation during roughing
• Length of cut: 26 mm
• Overall length: 83 mm
• Reach / neck relief: 37.5 mm reach with neck relief for deep pockets
• Shank: 12 mm Weldon shank for secure toolholding
• Material: HSS-E powder metallurgy body for toughness and wear resistance
• Coating: Alcrona Primax coating enhances hardness and wear resistance
• Helix angle: 35° for steady chip evacuation and smooth cutting
• Rake angle: 12° to optimize cutting forces in shoulder milling and ramping
• Roughing profile: HRA asymmetrical fine pitch for stable, efficient roughing
• Standards: DIN 844 K compliant for reliable interchangeability
• Applications: Shoulder milling, slot milling, and ramping in alloy and tool steel, stainless steel, cast iron, copper and copper alloys, and high-temperature alloys

In practice, this end mill delivers higher material removal rates without sacrificing edge integrity, thanks to the tough HSS-E powder metallurgy core and the wear-resistant Alcrona Primax coating. The 12 mm Weldon shank provides a secure, repeatable grip in common tool holders, reducing runout and improving precision across deep pockets and tight cavities. The combination of a 35° helix and a 12° rake angle supports efficient chip flow and reduced cutting forces, enabling smoother roughing passes in a variety of metals while maintaining predictable tool life and surface quality.