Engineered for precision CNC milling, the Dormer Pramet C247 21.0 mm end mill is a four-flute, standard-length cutter designed for shoulder milling, slotting, and ramping in free machining steels and copper alloys. Its powder-metallurgical HSS-E core and robust Weldon shank deliver dependable performance with steady rigidity and long tool life.

• Diameter: 21.0 mm
• Flutes: 4-flute geometry for strong cutting edges and efficient chip evacuation
• Length of cut: 38 mm
• Overall length: 104 mm
• Reach with neck relief: 53.5 mm
• Shank: 20 mm Weldon shank with flatted section for secure grip
• Standard: DIN 844 K compliance for reliable tool-holder compatibility
• Material: Powder-metallurgical HSS-E with bright finish for enhanced hardness and wear resistance
• Helix angle: 30° for smooth cutting action and good chip control
• Rake angle: 12° to support shoulder milling, slot milling, and ramping
• Applications: Shoulder milling, slot milling, ramping in free machining steel and copper alloys

The C247 end mill combines a tough, wear-resistant PM-HSS-E core with a precise 4-flute geometry and a neck-relieved reach, enabling deep pockets and complex features without compromising rigidity. The flatted Weldon shank minimizes slippage in holders, while the DIN 844 K standard ensures quick, predictable tool changes in busy production environments. This makes it a reliable choice for shops performing high-midelity milling in free-machining steels and copper alloys.