Meet the Dormer Pramet C273 end mill—a precisely engineered tool designed for shoulder and slot milling in steel and copper alloys. With a 1/8" diameter and specialty long-series geometry, it’s built for deep pockets, reliable chip control, and consistent finishes in demanding machine-shop workflows.

• Diameter: 1/8" (0.125")
• Length of cut: 15 mm
• Overall length: 59 mm
• Shank: 6 mm Weldon shank
• Material: Powder metallurgical HSS-E with bright finish
• Flutes: 4
• Helix angle: 30°
• Rake angle: 12°
• DIN standard: DIN 844 L
• Category: Long-series end mill
• Applications: Shoulder milling and slot milling; suitable for free machining and plain carbon steel, and copper or copper alloys

This end mill combines a robust 4-flute design with a 30° helix and a 12° rake to deliver smooth cutting action and effective chip evacuation in deep features. The powder-metallurgical HSS-E core provides improved wear resistance and edge retention over conventional HSS, helping maintain accuracy across extended cutting sessions. The bright finish minimizes built-up edge tendencies, supporting clean cuts and easier workpiece finish in both steel and copper alloys. With DIN 844 L compliance, you can rely on compatible fitment in standard tool holders for repeatable performance. The long-series length and 6 mm Weldon shank offer reach and secure clamping for challenging pockets and shoulder milling tasks.