Meet the Dormer Pramet C273 2.5mm HSS-E-Powder Metallurgical End Mill — a long-series, four-flute tool designed for precise shoulder and slot milling in free-machining steels and copper alloys. With a 6 mm Weldon shank and a compact 12 mm length of cut, it delivers reliable rigidity and reach in tight work pockets.

• Diameter: 2.5 mm
• Flutes: 4-flute configuration for efficient material removal and stable cutting
• Length of cut: 12 mm
• Overall length: 56 mm
• Shank: 6 mm Weldon shank for secure clamping
• Material: Powder metallurgical HSS-E with bright finish for enhanced wear resistance
• Helix angle: 30° for smooth chip formation
• Rake angle: 12° to optimize cutting efficiency and chip flow
• DIN standard: DIN 844 L for compatible tooling fits
• Applications: Shoulder milling and slot milling in free machining and plain carbon steel and copper or copper alloys

This end mill is engineered to deliver durable performance in micro-milling tasks. The powder-metallurgical HSS-E edge provides improved wear resistance and edge retention, helping extend tool life in demanding materials. The 30° helix enhances chip evacuation and reduces cutting forces, supporting cleaner walls and less workpiece distortion in tight slots. The 12° rake angle improves cutting efficiency and helps manage heat during deeper cuts. A solid 6 mm Weldon shank ensures repeatable clamping and minimizes tool deflection in precision applications. With its DIN 844 L length specification, this end mill integrates smoothly with standard toolholding systems, making it a dependable choice for micro-shoulder and slot milling in carbon steels and copper alloys.