Dormer Pramet C305 7.5mm HSS-E-Powder Metal Primax Flatted Shank 3 Flute Standard Length Slot Drill DIN 844 K

The Dormer Pramet C305 7.5mm HSS-E-Powder Metall Primax slot drill is a compact, high-precision tool designed for slot milling, shoulder milling, and ramping in a wide range of steels and alloys. Built for reliability in a short-series format, this 7.5 mm diameter drill delivers consistent walls, smooth finishes, and repeatable performance.

• Diameter: 7.5 mm
• Flutes: 3-flute design for efficient chip evacuation
• Length of cut: 16 mm
• Overall length: 66 mm
• Shank: 10 mm Weldon shank with a flat for secure seating
• Material: HSS-E with powder-metallurgical (Primax) construction and bright finish
• Helix angle: 30° for smooth cutting action
• Rake angle: 12° to improve cutting efficiency on shoulder and slot milling
• Standard: DIN 844 K
• Applications: shoulder milling, slot milling, and ramping
• Materials it handles: free machining and plain carbon steel, copper and copper alloys, plus Fe-, Ni-, and Co-based high-temperature alloys
• Brand: Dormer Pramet

Designed to tackle delicate slotting and robust shoulder cuts in a variety of metals, this slot drill combines a precise 7.5 mm diameter with a dependable 16 mm cutting length and a generous 66 mm overall length. The 30° helix and 12° rake angle help maintain steady cutting forces, reduce built-up edge, and improve surface quality across materials from free-machining steels to high-temperature alloys. The powder-metallurgical HSS-E construction enhances edge retention and wear resistance, while the bright finish aids in visibility and chip control during machining.