The Dormer Pramet C305 8.5 mm slot drill is a precision 3-flute tool designed for reliable slot milling, shoulder milling, and ramping in a range of materials. Built for free machining and alloy work, it delivers solid performance with a bright finish and a dependable Weldon shank.

• Diameter: 8.5 mm
• Flutes: 3-flute design for efficient chip evacuation and good surface finish
• Length of cut: 19 mm
• Overall length: 69 mm
• Shank: Weldon type, 10 mm
• Material: HSS-E powder metallurgical for enhanced hardness, toughness, and wear resistance
• Finish: Bright finish for smooth cutting action
• Helix angle: 30° to promote effective chip control
• Rake angle: 12° to improve cutting efficiency in steel and alloys
• Standards: DIN 844 K compatible
• Applications: Shoulder milling, slot milling, and ramping in free machining and various alloys
• Material suitability: Plain carbon steel, copper and copper alloys, Fe-, Ni-, and Co-based high-temperature alloys

Designed to tackle precise slotting with stability, the C305 combines a short series form and a robust 3-flute geometry to reduce tool deflection and improve accuracy in tight slots. The powder metallurgical HSS-E core provides a balanced blend of hardness and toughness, enabling longer tool life and consistent results across a demanding material mix. Use this drill for dependable, high-quality slots and shoulders in everyday steelwork and more challenging alloy applications.