Dormer Pramet C273 40.0 mm HSS-E powder-metallurgical long-series end mill is designed for precision shoulder and slot milling in free machining steels and copper alloys. Its long reach and robust construction make it a dependable choice for deep cavities and intricate milling tasks.

• Diameter: 40 mm
• Length of cut: 125 mm
• Overall length: 217 mm
• Reach with neck relief: 146.5 mm
• Shank: 40 mm Weldon
• Material: Powder metallurgical HSS-E with bright finish
• Flutes: 6-flute geometry
• Helix angle: 30°
• Rake angle: 12°
• Standard: DIN 844 L
• Applications: Shoulder milling and slot milling in free machining and plain carbon steel and copper/copper alloys

The combination of powder-metallurgical HSS-E and a bright finish provides improved wear resistance and toughness for demanding milling conditions. The 30° helix promotes efficient chip evacuation and smooth cutting, while the 12° rake angle supports controlled metal removal during shoulder operations. With a 146.5 mm neck relief reach, this tool maintains rigidity at depth, reducing deflection and delivering consistent finishes in deep pockets. The 40 mm Weldon shank ensures secure clamping in standard holders for reliable performance across multiple passes.