The Dormer Pramet C346 16.0 mm HSS-E Flatted Shank 3-Flute Slot Drill is a long-series end mill designed for shoulder and slot milling in free-machining steel and copper alloys. Built for deep pockets and demanding milling tasks, it pairs a cobalt-based HSS-E core with a durable bright finish for reliable performance.

• Diameter: 16.0 mm
• Flutes: 3-flute design for stable cutting and good chip evacuation
• Length of Cut: 63 mm
• Overall Length: 123 mm
• Reach with Neck Relief: 74.5 mm
• Shank Size: 16 mm Weldon shank
• Shank Feature: Flatted shank for positive drive and reduced slippage
• Material: HSS-E cobalt-based with a bright finish
• Helix Angle: 30° for efficient chip formation
• Rake Angle: 12° to optimize cutting in soft metals and copper alloys
• Standard: DIN 844 L
• Applications: Shoulder milling and slot milling in free-machining steel and copper or copper alloys

The combination of a long-series geometry with a 3-flute design offers steady progress through deeper features while maintaining clean slots and shoulders. The cobalt-based HSS-E composition provides improved heat and wear resistance, extending tool life under typical free-machining steel and copper alloy milling conditions. Neck relief and a generous reach enable you to access deeper pockets and slots in a single setup, reducing the need for tool changes and increasing productive time. The flatted shank and Weldon mounting deliver secure clamping and minimize tool deflection during heavy cuts, helping you achieve precise shoulders and accurate slot dimensions. This DIN 844 L-end mill is a dependable, versatile choice for precision milling in a busy workshop environment.