The Dormer Pramet C139 15.0 mm HSS-E-Powder TiCN Flatted Shank 2-Flute Standard Length Slot Drill is a precision tool designed for slot milling, shoulder milling, and ramping in free-machining steels and common alloys. With a robust HSS-E substrate and a TiCN coating, this DIN 844 K-compliant drill delivers dependable performance in challenging pockets and slots.

• Diameter: 15.0 mm
• Number of flutes: 2
• Length of cut: 26 mm
• Overall length: 83 mm
• Reach (neck relief): 37.5 mm
• Shank: Weldon, 12 mm
• Material: Powder metallurgical HSS-E
• Coating: TiCN for enhanced wear resistance
• Helix angle: 30°
• Rake angle: 12°
• Standard: DIN 844 K
• Applications: Slot milling, shoulder milling, ramping
• Materials suited: Plain carbon and alloy steel, cast iron, copper and copper alloys, titanium and titanium alloys

This slot drill is engineered for predictable cutting behavior and long tool life in mid- through high-hardness materials. The 30° helix promotes smooth entry and efficient chip formation, while the 12° rake angle helps control cutting forces during shoulder milling and ramping. The TiCN coating reduces wear and helps maintain edge sharpness across multiple passes, making it well-suited for free-machining applications and routine production work. The Weldon 12 mm shank provides a secure grip in standard holders, supporting stable milling in tight slots and pockets while maintaining accurate diameters and clean slot shoulders.