Dormer Pramet C123 4.0mm HSS-E-Powder Metal Flatted Shank 2 Flute Standard Length Slot Drill DIN 844 K

The Dormer Pramet C123 4.0 mm HSS-E powder-metallurgical slot drill is built for precision slot milling, shoulder milling, and ramping in steel, cast steel, and copper alloys. Its compact cutting length and robust Weldon shank keep slots accurate and repeatable even in demanding setups.

• Diameter: 4.0 mm
• Flutes: 2-flute design for efficient chip evacuation and stable cutting
• Cutting length: 11 mm
• Overall length: 55 mm
• Shank: 6 mm Weldon shank for secure clamping
• Material: HSS-E powder-metallurgical steel with bright finish
• Helix and rake: 30° helix and 12° rake angle for smoother cutting and better surface finish
• Standard: DIN 844 K compliant for compatibility with standard holders
• Applications: shoulder milling, slot milling, and ramping
• Recommended materials: steel, cast steel, copper and copper alloys

The 30° helix and 12° rake are tuned to deliver clean slot walls and steady cutting forces, reducing chatter and improving surface finish on both steel and copper-based materials. The powder-metallurgical HSS-E construction combines hardness with toughness, providing longer tool life in demanding milling scenarios and resisting wear when cutting through harder alloys. A bright finish helps minimize built-up edge, ensuring consistent performance across multiple slots without frequent re-sharpening. The 6 mm Weldon shank offers a robust grip in collets and end mills holders, minimizing runout for repeatable accuracy during high-precision operations. With DIN 844 K compatibility, this drill pairs smoothly with common tool holders, enabling straightforward swaps in busy workshops. Ideal for shallow slots thanks to the 11 mm cutting length, it also supports ramping moves and shoulder milling to prepare features in one setup, reducing cycle time and tool changes.