Dormer Pramet A940 5.00 mm HSS-E HIGH PERF MULT-APP STRAIGHT SHANK LONG SERIES DRILL DIN/ANSI

The Dormer Pramet A940 5.00 mm HSS-E High Performance Multi-Application Straight Shank Long Series Drill (DIN/ANSI) is purpose-built for professionals who demand precision, durability, and versatile metalworking capabilities in a single tool. This 5 mm drill blends aggressive cutting geometry with refined engineering to deliver clean holes across a wide material spectrum, from steel to aluminum and stainless steel.

Why this drill stands out

• 130° point for self-centering and reduced push force. The precise point geometry minimizes wandering, helping you start holes accurately with less effort—especially important in hard-to-centre workpieces or manual setups.
• Bright finish to prevent sticking. A well-finished cutting edge reduces built-up material on the edge, promoting smoother starts and reducing the chance of premature edge wear.
• Parabolic flute design for deep-hole capability. This unique flute geometry channels chips efficiently, enabling deeper holes in a single pass and improving penetration without frequent retraction.
• Premium HSS-E material. Built from high-speed steel with cobalt enhancement, this drill maintains hardness and wear resistance when drilling tough metals, including steel and stainless steel, while still performing well in non-ferrous materials like aluminum.
• Long series with straight shank (DIN/ANSI). The extended flute length and straight shank ensure compatibility with most collets and chucks used in professional machining centers and drill presses, delivering consistent concentricity and accuracy.
• High-performance hole quality (H10 tolerance). Designed to produce high-quality, accurately sized holes even at higher speeds and feeds, supporting tight assembly fits and reliable component performance.

Ideal use cases and applications

Designed for workshops and production environments where versatility matters, the A940 5.00 mm drill excels in:

• General-purpose drilling in steel, stainless steel, and aluminum, balancing wear resistance with fast material removal.
• Deep-hole drilling tasks where reach and chip evacuation are critical, thanks to the parabolic flute geometry.
• Upholding tight tolerances in DIN/ANSI environments, ensuring consistent hole diameters compatible with standard fasteners and fittings.
• Prototype to production phases where multiple materials are encountered, reducing tool changes without sacrificing hole quality.

Practical benefits and optimization tips

To get the most from the Dormer Pramet A940 drill, consider these practical guidelines:

• Match cutting speed and feed rate to the material—higher speeds for aluminum, balanced feeds for steel, and appropriate lubrication for stainless to extend edge life.
• Use a sharp pilot or center mark to leverage the 130° point and minimize wandering on hard or reflective surfaces.
• For deeper holes, maintain a steady chip evacuation path and consider intermittent retractions to clear chips without overheating the edge.
• Ensure your drill chuck or collet is clean and properly tightened to preserve concentricity and hole accuracy at DIN/ANSI standards.
• When transitioning between materials, inspect the edge for wear and replace as needed to maintain H10 hole tolerance consistently.

Specification snapshot: 5.00 mm diameter, HSS-E (high-speed steel with cobalt), long series, straight shank, DIN/ANSI compatibility, 130° point, parabolic flute, bright finish, h10 hole tolerance.