Meet the Dormer Pramet C305 6.5 mm slot drill—a precise, 3-flute tool designed for shoulder and slot milling in a range of metals. Built for engineers and machinists who demand dependable performance in free‑machining steels and tougher alloys, it combines a compact 66 mm overall length with a robust Weldon 10 mm shank.

• Diameter: 6.5 mm
• Length of Cut: 16 mm
• Overall Length: 66 mm
• Shank: Weldon 10 mm
• Material: HSS‑E powder metallurgical with bright finish (Primax)
• Flutes: 3
• Helix: 30° for efficient chip control and smoother cutting
• Rake Angle: 12° to improve cutting action and finish
• DIN Standard: 844 K
• Applications: Shoulder milling, slot milling, and ramping in a variety of metals
• Materials Suitable: Free machining and plain carbon steel, copper and copper alloys, Fe-based, Ni-based, and Co-based high-temperature alloys

This slot drill is engineered for dependable, repeatable performance across common milling tasks. The powder‑metallurgical HSS‑E composition offers improved hardness and wear resistance over traditional HSS, helping extend tool life and maintain sharpness through demanding cuts. The 30° helix and 12° rake angle optimize chip formation and reduce cutting forces, contributing to cleaner slots and better surface finishes. The 10 mm Weldon shank provides secure, toolholder-friendly engagement in standard milling setups, supporting accurate, vibration-free performance during slotting, shoulder work, and ramping maneuvers.