Meet the Dormer Pramet A940 12.20 mm HSS-E High-Performance Multi-Application Straight Shank Long Series Drill (DIN/ANSI). Built for reliability in demanding workpieces, this long-series drill combines depth, precision, and versatility in a single tool you can trust for a wide range of materials and applications.

Key features that matter in real-world drilling

• 130-degree point for self-centering and reduced push force, helping you start clean holes with less wandering and easier guiding during initial entry.
• Bright finish minimizes material sticking to the cutting edge, promoting smoother chip flow and cleaner hole entrances.
• Parabolic flute design enables drilling extra-deep holes in a single pass, reducing cycle times and the need for secondary operations.
• Premium HSS-E material offers robust wear resistance and longevity across a variety of workpieces, including steel, aluminium, and stainless steel.
• High-performance drilling with h10 hole tolerance ensures accurate, repeatable holes even at higher speeds and feeds, making this drill suitable for precision work and production environments.

What makes this drill uniquely suited for long-reach, versatile drilling

The A940 is designed as a straight shank long-series drill that delivers consistent performance when you need depth without sacrificing accuracy. Its design supports deep-hole work and multi-material capability, so you can tackle automotive, aerospace, and general manufacturing tasks without changing tooling frequently. The DIN/ANSI compatibility ensures reliable fitment with standard chucks and adaptors, streamlining setup in busy shops.

Ideal use cases and who benefits most

• Through-holes and blind holes in steel, aluminium, and stainless steel where depth and precision are critical.
• High-speed drilling operations in production environments that demand clean entry, stable feeds, and tight tolerances.
• Long-reach drilling tasks in fabrications, machine builds, and maintenance projects where a single tool covers multiple material types.

Practical tips for best results

• Match cutting speed and feed to the material: higher speeds with steady feeds for Aluminium, controlled speeds with adequate lubrication for steel and stainless.
• Use appropriate cutting fluid to optimize heat management and extend tool life, especially when drilling tougher metals.
• Ensure proper centering and workpiece clamping to leverage the 130-degree point’s self-centering capability.
• Let the parabolic flute design evacuate chips efficiently; avoid dwelling at full depth to maintain surface finish.
• Inspect the drill regularly for wear and re-sharpen or replace as needed to maintain h10 hole tolerances and hole quality.