Dormer Pramet C908 20.0mm HSS-E-Powder Metal Alcrona Primax Flatted Shank Multi-Flute Roughing (NRA) Standard Length End Mill DIN 844 K

Engineered for robust roughing, the Dormer Pramet C908 20.0mm HSS-E powder-metallurgy end mill delivers reliable material removal for shoulder milling, slot milling, and ramping across a wide range of steels and alloys. With a flat (Weldon) 20 mm shank, this end mill is built to perform in demanding production environments while maintaining precision and tool life.

• Diameter: 20.0 mm
• Length of Cut: 38 mm
• Overall Length: 104 mm
• Reach with Neck Relief: 53.5 mm
• Shank Type: 20 mm Weldon (flat) shank
• Material & Coating: Powder-metallurgical HSS-E with Alcrona Primax coating
• Flutes: 4
• NRA Geometry: Asymmetrical coarse-pitch profile for aggressive roughing
• Helix & Rake: 35° helix, 12° rake
• DIN Standard: DIN 844 K compliance
• Applications: Shoulder milling, slot milling, and ramping
• Material Compatibility: Suitable for plain carbon steel, alloy steel, tool steel, stainless steel, cast iron, copper or copper alloys, and high‑temperature alloys

The combination of NRA geometry and a four-flute arrangement enables efficient chip formation and evacuation even in deeper pockets, while the 35° helix and 12° rake reduce cutting forces and improve control during roughing passes. The Alcrona Primax coating enhances wear resistance and helps extend tool life on hard-to-machine materials, supported by the toughness of powder-metallurgical HSS-E substrate. With a long reach and neck relief, this end mill maintains clearance in tight cavities and shoulders without rubbing, making it a dependable choice for production runs that demand consistent performance across a variety of workpieces.