Meet the Dormer Pramet A940 6.50 mm HSS-E High-Performance Multi-Application Drill. Designed for reliability across multi-material work, this DIN/ANSI straight-shank, long-series drill delivers consistent, high-quality holes from the first pass to the last. Built for demanding production environments, it pairs precise geometry with tough materials to help you hit target tolerances fast.

Key features that matter in real-world drilling

• 130° point geometry promotes self-centering and reduces the push force required, helping you start holes cleanly and maintain accuracy—even on challenging workpieces.
• Bright, anti-adhesion finish minimizes workpiece material sticking to the cutting edge, reducing chip buildup and extending tool life in tough metals.
• Parabolic flute design optimizes chip evacuation, enabling deeper holes in a single pass without sacrificing surface finish or hole straightness.
• Premium HSS-E material engineered for versatility—efficiently drills steel, aluminum, stainless steel, and more, with reliable performance across alloys.
• High-speed, high-feed capability delivers consistent hole quality with tight H10 tolerances, making it suitable for both manual and CNC drilling operations.

Why this drill stands out for serious manufacturing

The A940 is not just a drill bit—it’s a multi-application solution. The combination of a precision 6.50 mm cutting edge, robust HSS-E substrate, and the parabolic flute geometry means you can push speeds and feeds with confidence while maintaining accurate hole sizes. The straight shank ensures compatibility with a wide range of collets and chucks, simplifying setup on machining centers, drill presses, and automated tooling systems. Whether you’re punching through steel plate, navigating stainless steel corners, or piercing aluminum extrusions, this drill is built to maintain form and finish under load.

Ideal applications and practical use cases

• General engineering, fabrication shops, and production environments requiring dependable, repeatable drilling across materials.
• Automotive and aerospace components where precise hole placement and straightness are critical.
• Fabrication that involves mixed-material assemblies—steel, aluminum, and stainless components benefit from a single, reliable drill design.
• Long-series production drilling where tool life and hole consistency across hundreds or thousands of holes matter.

Best practices for optimal performance

• Use appropriate lubrication or coolant to manage heat, preserve edge life, and achieve cleaner holes.
• Coordinate cutting speed and feed rate with the material to maximize hole quality and tolerance adherence (H10) without overloading the tool.
• Ensure secure workholding to prevent wandering on deep or through-holes, especially when drilling with a parabolic flute geometry.
• Inspect the drill before long runs and deburr holes as needed to maintain dimensional accuracy and smooth downstream assembly.