Dormer Pramet C247 40.0mm HSS-E-Powder Metal Flatted Shank Multi-Flute Standard Length End Mill DIN 844 K

The Dormer Pramet C247 40.0mm HSS-E-Powder Metallurgical End Mill is a robust, long-reach tool designed for shoulder, slot milling and ramping in free-machining steels and copper alloys. Built for reliability in demanding milling tasks, it combines a precise 40 mm diameter with a strong HSS‑E powder metallurgy core for durable performance.

• Diameter: 40 mm
• Flutes: 6-flute design for efficient chip evacuation and a smooth finish
• Length of cut: 63 mm
• Overall length: 155 mm
• Reach with neck relief: 84.5 mm for deep pockets and challenging geometry
• Shank type: Weldon shank, 40 mm
• Material: HSS‑E powder metallurgy with bright finish for enhanced wear resistance
• Helix angle: 30° for effective chip formation
• Rake angle: 12° to optimize shoulder milling cuts
• Standards: DIN 844 K
• Applications: Shoulder milling, slot milling, and ramping
• Material compatibility: Suitable for free machining steels, plain carbon steel, and copper or copper alloys

This end mill delivers predictable performance through its powder-metallurgical HSS‑E construction, which provides improved hardness and wear resistance over conventional HSS. The 30° helix and 12° rake angle are optimized to reduce cutting forces and improve surface finish during shoulder and slot milling. With a long reach and substantial LOC, it enables access to deeper features while maintaining rigid performance in single-pass and step milling. The Weldon shank ensures secure clamping in a variety of tool holders, making it a dependable choice for precision milling in mixed-material environments where accuracy and tool life matter.