Dormer Pramet C428 20.0mm HSS-E-Powder Metal Alcrona Primax Flatted Shank Multi-Flute Roughing (HRA) Standard Length End Mill DIN 844 K

The Dormer Pramet C428 20.0 mm HSS-E powder metallurgy end mill is a robust roughing tool built for demanding metalworking tasks. Designed for shoulder milling, slot milling, and ramping, it excels in alloy and tool steels, stainless steels, cast iron, copper and its alloys, and high-temperature alloys.

• Diameter: 20.0 mm
• Length of cut: 38 mm
• Overall length: 104 mm
• Reach with neck relief: 53.5 mm
• Shank size: Weldon 20 mm
• Material: HSS-E, powder metallurgical
• Coating: Alcrona Primax
• Flutes: 4
• Helix angle: 35°
• Rake angle: 12°
• Standard: DIN 844 K
• Geometry: HRA asymmetrical fine-pitch profile
• Applications: shoulder milling, slot milling, and ramping in various steels and nonferrous alloys

With a 4-flute design and a precise asymmetrical fine-pitch geometry, this end mill delivers efficient material removal and improved chip control during roughing. The powder-metallurgical HSS-E core combined with the Alcrona Primax coating enhances wear resistance and tool life, while the DIN 844 K Weldon shank ensures compatibility with a wide range of holders. The 35° helix and 12° rake angle promote smooth entry and stable cutting in challenging materials, making it a reliable choice for high-temperature alloys, stainless steels, and tough cast irons.