The Dormer Pramet C305 18.0 mm slot drill is a precision 3‑flute tool designed for slot milling, shoulder milling, and ramping in free‑machining steels and high‑temperature alloys. Built to DIN 844 K with a 16 mm Weldon shank and powder‑metallurgical HSS‑E (Primax) finish, it delivers dependable, long‑lasting performance in a compact standard length design.

• Diameter: 18.0 mm
• Number of flutes: 3
• Length of cut: 32 mm
• Overall length: 92 mm
• Reach with neck relief: 43.5 mm
• Shank: Weldon, 16 mm
• Material: Powder‑metallurgical HSS‑E (Primax) with bright finish
• Helix angle: 30°
• Rake angle: 12°
• DIN standard: 844 K
• Applications: Slot milling, shoulder milling, ramping
• Material compatibility: Free machining steel, plain carbon steel, copper and copper alloys; Fe‑based, Ni‑based, and Co‑based high‑temperature alloys

This slot drill is engineered for smooth chip formation and steady cutting in a range of metals, helping you achieve precise slots, shoulders, and ramps with minimal tool wear. The combination of a durable Weldon shank, reliable 3‑flute geometry, and the hard‑wearing powder‑metallurgical HSS‑E core translates to longer tool life and more consistent results across batch runs. The 32 mm length of cut enables deeper pockets and stepped features, while the neck relief reach supports access to recessed areas without compromising rigidity. Ideal for workshop environments that handle diverse materials—from copper alloys to challenging high‑temperature alloys—this cutter maintains accuracy and efficiency from first cut to last.