Dormer Pramet A940 4.20 mm HSS-E HIGH PERF MULT-APP STRAIGHT SHANK LONG SERIES DRILL DIN/ANSI

Meet the Dormer Pramet A940 4.20 mm HSS-E High Performance Multi-Application Straight Shank Long Series Drill (DIN/ANSI). Built for reliability in real-world production, this drill delivers consistent holes across a wide range of materials with minimal setup and maximum control.

Shown from multiple angles, the Dormer Pramet A940 reveals its robust straight shank and long-series flute geometry, engineered to conquer deep-hole tasks with precision and ease.

• 130-degree point for self-centering and reduced push force: starts cleanly, minimizes wandering, and helps you achieve accurate holes from the very first stroke.
• Bright finish: reduces material sticking to the cutting edge, preserving geometry and extending tool life for repeatable results.
• Parabolic flute design: optimized chip evacuation and a single-pass capability for extra-deep holes, boosting throughput and reducing cycle times.
• Ppremium HSS-E material: cobalt-enhanced high-speed steel delivers improved hot hardness and wear resistance, suitable for steel, aluminum, and stainless steel.
• Long-series, straight shank: DIN/ANSI compatibility ensures broad toolholding compatibility and stability for deep-hole drilling applications.
• High-performance with tight H10 hole tolerance: capable of high speeds and feeds while delivering precise, repeatable hole sizes for critical components and assemblies.

This drill is ideal for shops and manufacturers that need a versatile, reliable bit for multi-material drilling—from structural steel and stainless to aluminum tooling and fabrications. The A940’s combination of a self-centering point, advanced flute geometry, and durable HSS-E construction translates into fewer tool changes, less rework, and tighter tolerances in every job.

Key use cases include automotive sheet metal, general fabrication, appliance manufacturing, and prototyping environments where deep, clean holes are a regular requirement. When matched with compatible chucks and proper cutting conditions, the A940 delivers consistent hole quality at higher speeds and feeds, helping you meet production deadlines without compromising accuracy.

Practical tips for best results: - Use appropriate cutting fluid or coolant to manage heat when drilling harder steels. - Securely clamp workpieces and align the drill axis with the hole center to maximize accuracy. - Start with a light feed to establish the 130° point, then progressively increase speed and feed for efficient material removal without overheating. - Inspect drilled holes for smooth bore finish and consistent diameter to ensure they meet the H10 tolerance specification.