The Dormer Pramet C305 12.0 mm HSS-E-Powder Metallurgically produced Primax slot drill is a precision tool designed for slot milling, shoulder milling, and ramping. Built for free machining and alloy work, it delivers reliable performance across steels, copper alloys, and high‑temperature alloys.

• Diameter: 12.0 mm
• Flutes: 3-flute design for efficient slotting and steady cutting
• Length of cut: 26 mm
• Overall length: 83 mm
• Reach with neck relief: 37.5 mm
• Shank: 12 mm Weldon shank for precise seating in collets
• Material: HSS-E powder metallurgical with Primax bright finish
• Helix angle: 30°
• Rake angle: 12°
• Standard: DIN 844 K
• Applications: Shoulder milling, slot milling, and ramping
• Supported materials: Free machining and plain carbon steel, copper and copper alloys, Fe-/Ni-/Co-based high-temperature alloys

In practice, this drill excels at producing clean slots and accurate shoulders with consistent geometry. The 3-flute design provides a balance between material removal and finish, while the 30° helix and 12° rake angle optimize cutting action in a range of alloys, helping to reduce cutting forces and improve chip flow. The powder-metallurgical HSS-E construction offers enhanced toughness and wear resistance, extending tool life in demanding applications.