Engineered for precise slot milling in free-machining steels and copper alloys, the Dormer Pramet C135 6.0mm HSS-E slot drill is a reliable choice for deep slots and clean finishes. Designed for professional machinists, it combines a robust 6 mm Weldon shank with a cobalt-based HSS-E core and a bright finish for long-lasting performance.

• Diameter: 6.0 mm
• Flutes: 2 flutes for efficient chip evacuation and smooth cutting in slots
• Length of cut: 13 mm
• Overall length: 68 mm
• Reach with neck relief: 32 mm
• Shank type: Weldon shank, 6 mm
• Material: HSS-E cobalt-based steel with bright finish
• Helix angle: 30° for steady cutting action
• Rake angle: 12° to improve cutting efficiency in copper alloys
• Standard: Dormer standard specification

This slot drill is ideal for engineers and machinists performing slot milling tasks where tight tolerances and clean slot walls are essential. The cobalt-based HSS-E construction boosts wear resistance and red hardness, helping extend tool life in challenging materials. The 30° helix and 12° rake work together to deliver consistent cutting forces, good surface finish, and reliable performance when removing material in restricted slots. Use this drill to create slots, keyways, or narrow pockets with confidence, knowing the geometry is tuned for free-machining steels and copper alloys.