Meet the Dormer Pramet C40 12.0mm HSS-E end mill—a robust, four-flute roughing tool designed for shoulder and slot milling in free-machining steels and copper alloys. Its NF flat coarse-pitch profile and Weldon shank deliver dependable stock removal in demanding production environments.

• Diameter: 12.0 mm
• Flutes & Profile: 4-flute NF (coarse-pitch) roughing geometry for efficient chip evacuation
• Length Details: 26 mm length of cut (LOC), 83 mm overall length (OAL)
• Shank & Standard: 12 mm Weldon shank, DIN 844 K standard
• Material & Finish: Cobalt-based HSS-E with bright finish for improved wear resistance
• Geometry: 30° helix and 12° rake angle optimized for shoulder milling, slot milling, and ramping
• Applications: Suitable for free-machining and plain carbon steels as well as copper and copper alloys

The tool’s cobalt-enhanced HSS-E core provides better hot hardness and wear resistance, enabling higher cutting speeds and longer tool life in tougher materials. The 30° helix promotes smooth chip formation and evacuation, while the 12° rake helps minimize built-up edge during shoulder and slot milling. With a precise DIN 844 K specification and a durable Weldon shank, this end mill stays securely clamped under heavy loads and rigorous milling routines. The 26 mm cut length and 83 mm overall length offer the reach and rigidity needed for multi-pass roughing without frequent tool changes—ideal for workshops and production lines seeking consistent performance and reliable stock removal in copper alloys and free-machining steels.