Meet the Dormer Pramet C306 10.0 mm HSS-E Powder Metallurgically produced Primax slot drill. This extra-short, 3-flute tool is designed for precise slot milling, shoulder milling, and ramping in free-machining steels and copper alloys, delivering reliable performance in tight pockets and narrow slots.

• Diameter: 10.0 mm
• Length of cut: 13 mm
• Overall length: 63 mm
• Reach with neck relief: 22.5 mm
• Shank: 10 mm Weldon shank
• Flutes: 3
• Material: HSS-E powder metallurgy with bright finish
• Helix angle: 30°
• Rake angle: 12°
• Standards: DIN 327 D
• Applications: Shoulder milling, slot milling and ramping
• Suitable materials: Free machining steel, plain carbon steel, copper and copper alloys

The 30° helix and 12° rake are chosen to balance efficient metal removal with smooth cutting action, helping to produce clean slots with minimal built-up edge. Powder metallurgy HSS-E enhances wear resistance and edge life, giving predictable performance in repeated productions or prototyping. The bright finish aids chip shedding and reduces material adhesion, while neck relief minimizes rubbing in deeper recesses for consistent slot dimensions. DIN 327 D compatibility ensures easy integration with standard tool holders, and the Primax line is tuned for dependable, long-lasting performance in demanding milling tasks on common engineering materials.