Introducing the Dormer Pramet A940 6.40 mm HSS-E High Performance Multi-Application Straight Shank Long Series Drill, engineered for precision metalworking across multiple materials. Built to endure demanding industrial use, this drill delivers consistent hole quality from the first pass to the last.

Key features that matter in real-world drilling

• 130-degree point designed for fast self-centering and reduced push force, helping you start holes cleanly and minimize wandering even on tough or warped workpieces.
• Bright finish keeps workpiece material from sticking to the cutting edge, promoting smoother starts and reducing built-up edge during high-speed drilling.
• Parabolic flute design enhances chip evacuation and rigidity, enabling deeper holes to be drilled in a single pass with less retractions and less heat buildup.
• Premium HSS-E material combines high-speed capability with excellent wear resistance, suitable for drilling a wide range of materials including steel, aluminum, and stainless steel.
• High-performance drilling delivers accurate hole quality even at elevated speeds and feeds, maintaining H10 hole tolerance for consistent results in production environments.
• DIN/ANSI straight shank long series offers compatibility with a broad spectrum of milling machines, drill presses, and CNC setups, ensuring reliable fitment and repeatable performance across tools and fixtures.

Who benefits most

• Engineers and machinists working with mixed-material projects who need a single drill capable of handling steel, aluminum, and stainless components.
• Fabrication shops that demand dependable, high-quality holes with tight tolerances without changing tools frequently.
• Production environments where deep holes are common, and efficiency matters—this drill is designed to maintain performance through repeated passes.

Why this drill stands out in practice

• Compared to standard high-speed drills, the A940’s 130-degree point and parabolic flute geometry reduce start-up resistance and improve chip control, which translates to less tool deflection and more consistent hole alignment.
• The HSS-E core provides extended tool life, even when drilling harder alloys or stainless steel, helping you lower tool-change frequency and increase uptime.
• Its multi-application capability eliminates the need for swapping between different drills in mixed-material jobs, delivering a smoother workflow from roughing to finishing passes.

Practical tips for optimal results:

• Use appropriate cutting speeds and feeds for the material being drilled; start with conservative settings and gradually increase to leverage the drill’s high-speed capability without overheating.
• Ensure proper work-holding and a steady feed to maximize the benefits of the 130-degree point and parabolic flute design.
• Pair with compatible coolant strategies when drilling steels and stainless steels to extend tool life and maintain edge quality.