Dormer Pramet C618 3/8 Inch HSS-E Flatted Shank 4 Flute End Mill Regular Length is a precision cutting tool designed for shoulder and slot milling in free-machining steels and copper alloys. Built with a cobalt-based HSS-E core and a bright finish, it delivers dependable performance in everyday machining tasks.

• Diameter: 3/8" end mill for consistent, controllable chip formation
• Flute count: 4-flute geometry to balance material removal and finish quality
• Length of cut: 3/4" (0.75") for effective pocketing and shoulder milling
• Overall length: 2-1/2" (2.5") for confident reach in tight cavities
• Shank: 3/8" Weldon shank for secure seating and repeatable clamping
• Material: Cobalt-based HSS-E with bright finish for improved hardness and wear resistance
• Helix angle: 30° helix to promote steady penetration and efficient chip flow
• Standard: ANSI regular-length end mill specification
• Applications: Shoulder milling, slot milling and ramping into workpieces
• Compatible materials: Effective in free-machining carbon steel and copper/copper alloys

This end mill is engineered to deliver reliable performance across common milling scenarios. The 4-flute design provides solid rigidity and good surface finish, while the cobalt-based HSS-E core resists wear during intermittent and high-heat cutting. The 30° helix aids in smooth cutting and manageable chip evacuation, helping maintain control during shoulder and slot operations. The Weldon shank supports stable clamping and reduced runout, enhancing precision in both CNC and manual milling setups. With its balanced geometry and practical cutting length, it’s a versatile choice for everyday milling tasks that demand repeatable results in carbon steels and copper alloys.