The Dormer Pramet C346 13.0 mm HSS-E flatted shank long-series slot drill is designed for shoulder milling and slot milling in free‑machining steel and copper alloys. Built to DIN 844 L standards, it delivers dependable reach and precision in deep slots and pockets.

• Diameter: 13.0 mm
• Flutes: 3-flute geometry for efficient cutting and stable chip evacuation
• Length of cut: 53 mm
• Overall length: 110 mm
• Reach with neck relief: 64.5 mm
• Shank: Weldon 12 mm for secure seating in collets
• Material: HSS-E cobalt-based steel with bright finish
• Helix angle: 30° for smooth cutting and good chip flow
• Rake angle: 12° to optimize cutting action on shoulder and slot features
• Standard: DIN 844 L
• Applications: Shoulder milling and slot milling in free-machining steel and copper/copper alloys

This long-series end mill combines durability with extended reach, making it well-suited for deeper slots and pockets where consistent tool life and clean, precise finishes matter. The cobalt-based HSS-E construction offers enhanced wear resistance and hot hardness, helping maintain accuracy under demanding cutting conditions. With a robust 3‑flute configuration, it handles chip removal efficiently while preserving rigidity, and the Weldon shank provides reliable retention in standard tooling setups. Whether you’re shaping shoulders or carving slots in copper alloys, this drill delivers predictable performance and repeatable results.