Meet the Dormer Pramet C273 20.0 mm end mill, a long-series, 4-flute cutter designed for shoulder and slot milling in free machining and plain carbon steels as well as copper and copper alloys. Built for precision and reliability, it pairs a robust HSS-E powder-metallurgical core with a flat shank for secure, repeatable performance.

• Diameter: 20.0 mm
• Flutes: 4-flute configuration for efficient chip evacuation and smooth cutting action
• Length of cut (LOC): 75 mm
• Overall length (OAL): 141 mm
• Reach with neck relief: 90.5 mm for deep pockets and extended reach
• Shank: Weldon, 20 mm diameter for secure tool seating
• Material: Powder-metallurgical HSS-E with bright finish for wear resistance and long tool life
• Helix angle: 30° for smooth shearing and controlled chip formation
• Rake angle: 12° to optimize cutting efficiency and shoulder milling performance
• Standard: DIN 844 L compatibility for reliable fit in standard holders
• Applications: Shoulder milling and slot milling in free machining steel and copper/copper alloys

This end mill is crafted to deliver consistent, accurate cuts in challenging depths thanks to its long series geometry and neck relief. The 30° helix and 12° rake angle ensure efficient chip control and reduced cutting forces, helping you maintain surface finish and dimensional accuracy in demanding workflows. The bright, powder-metallurgical HSS-E core provides robust wear resistance, making it a dependable choice for recurring production runs and tool life that matters.