The Dormer Pramet C346 8.0mm HSS-E Flatted Shank 3 Flute Long Series Slot Drill is a long-series end mill designed for precise shoulder and slot milling in steel and copper alloys. Built with cobalt-based HSS-E and a bright finish, it delivers dependable performance in demanding machining environments.

• Diameter: 8.0 mm
• Length of Cut: 38 mm
• Overall Length: 88 mm
• Shank: Weldon 10 mm with flatted surface for secure seating
• Flutes: 3-flute design for efficient material removal
• Material: Cobalt-based HSS-E for enhanced wear resistance
• Finish: Bright finish to reduce friction and buildup
• Helix Angle: 30° for effective chip evacuation
• Rake Angle: 12° to improve cutting action on shoulders
• DIN Standard: DIN 844 L compatible
• Applications: Shoulder milling and slot milling in free machining steel and copper/copper alloys

The 3-flute geometry strikes a balance between aggressive material removal and a clean edge, making it well-suited for slotting and contouring in moderate to tough metals. The long-series design provides extended reach for deeper slots and wider shoulders, while the cobalt-based HSS-E construction extends tool life when cutting challenging workpieces. A flatted shank helps secure the tool in holders, reducing runout and enhancing stability during high-speed milling. Compatible with standard DIN 844 L tool holders, this drill offers reliable interchangeability in busy fabrication environments. Ideal for shops seeking durable, precision-slotting performance on free-machining steel and copper alloys.