The Dormer Pramet C428 15.0 mm HSS-E powder metallurgy end mill is a compact roughing tool designed for demanding milling tasks in hard-to-cut materials. Built for shoulder milling, slot milling, and ramping, it delivers steady material removal with reliable wear resistance.

• Diameter: 15.0 mm
• Flutes: 4
• Length of Cut: 26 mm
• Overall Length: 83 mm
• Reach with Neck Relief: 37.5 mm
• Shank: Weldon, 12 mm
• Standard: DIN 844 K
• Material Core: HSS-E powder metallurgy
• Coating: Alcrona Primax
• Helix: 35°
• Rake Angle: 12° (optimized for shoulder milling)
• Cutting Profile: HRA asymmetrical fine pitch
• Applications: shoulder milling, slot milling, ramping
• Material Compatibility: alloy steels, tool steels, stainless steels, cast iron, copper and copper alloys, and high-temperature alloys

This end mill combines a robust HSS-E substrate with a durable Alcrona Primax coating to deliver reliable wear resistance and consistent performance across a range of metals. The four-flute design supports efficient chip evacuation, while the asymmetrical fine-pitch geometry helps reduce chatter for smoother roughing passes. With a DIN 844 K shank and a 12 mm Weldon interface, it pairs easily with standard milling holders and tooling setups. The 26 mm engagement length provides solid cutting depth for shallow to moderate pockets, and the 37.5 mm reach afforded by neck relief adds versatility in spatially constrained workpieces. Whether you’re roughing alloy or stainless steels, cast iron, or copper alloys, this end mill is suited to demanding milling tasks that demand reliability and predictable results.