Precisely engineered for slot milling, shoulder milling, and ramping in free machining steels and copper alloys, the Dormer Pramet C306 20.0 mm HSS-E Powder Metallurgy Primax Flatted Shank 3-Flute Short Series Slot Drill delivers dependable performance in tight pockets and rapid setups.

• Diameter: 20.0 mm
• Flutes: 3-flute design for balanced material removal and rigidity
• Length of cut: 22 mm
• Overall length: 88 mm
• Reach with neck relief: 37.5 mm
• Shank: Weldon, 20 mm, Primax flatted shank for secure clamping
• Material: HSS-E powder metallurgy with bright finish
• Helix angle: 30°
• Rake angle: 12°
• Standard: DIN 327 D
• Applications: Slot milling, shoulder milling, ramping
• Material compatibility: Suitable for free machining steels and copper or copper alloys

This combination of geometry and metallurgy translates into efficient chip control, strong edge retention, and reliable performance in demanding milling tasks. The 3-flute configuration supports steadier feeds in slot and shoulder operations, while the 30° helix and 12° rake angle help reduce cutting forces and improve surface finish. The Primax flat shank and 20 mm Weldon interface ensure secure, repeatable clamping in standard holders, minimizing runout for consistent accuracy. With DIN 327 D conformity and a bright finish that resists built-up edge, this drill is a dependable choice for precise, repeatable results in manufacturing and maintenance environments.