Designed for precision slot milling and shoulder milling on free machining steels and copper alloys, the Dormer Pramet C306 12.0mm HSS-E-Powder Metallurgical Primax Flat Shank 3-Flute Short Series Slot Drill is built for reliable performance in tight spaces. Its compact 12 mm diameter and specialized geometry deliver clean slots and consistent results across multiple milling operations.

• Diameter: 12.0 mm
• Length of cut: 16 mm
• Overall length: 73 mm
• Reach / neck relief: 27.5 mm reach with neck relief
• Shank: 12 mm Weldon flat shank (DIN 327 D)
• Material: HSS-E powder metallurgy with bright finish (Primax)
• Flutes: 3-flute short-series design
• Helix angle / rake: 30° helix, 12° rake angle
• Standard: DIN 327 D
• Applications: Slot milling, shoulder milling, and ramping in free machining steel and copper alloys

In practical use, this tool delivers smooth chip formation and stable cutting in small-diameter slots, with geometry optimized for shoulder milling and ramping. The powder-metallurgical HSS-E composition provides robust wear resistance and toughness for longer tool life in demanding production environments. The 12 mm Weldon shank ensures solid clamping and repeatable accuracy, while the neck relief and short form minimize deflection and chatter in tight pockets. Ideal for shops machining plain carbon steels and copper or copper alloys that require precise slots and clean finishes.