Dormer Pramet A940 1.70 mm HSS-E HIGH PERF MULT-APP STRAIGHT SHANK LONG SERIES DRILL DIN/ANSI

Dormer Pramet A940 1.70 mm HSS-E High Perf Multi-APP Straight Shank Long Series Drill DIN/ANSI is built for engineers who demand precision, depth, and consistent hole quality in a single pass. This long-series, straight-shank drill pairs materials and geometry that unlock reliable performance across a range of metals, delivering repeatable results in demanding applications.

Key features that drive real-world results

• 130° point for self-centering – starts quickly and tracks true in hard-to-centre spots, reducing the push force required and minimizing wander during initial entry.
• Bright finish for smoother chip flow – designed to prevent workpiece material from sticking to the cutting edge, helping maintain clean holes and longer tool life.
• Parabolic flute design – optimized for aggressive material removal while preserving stability, enabling deeper holes to be drilled in a single pass without sacrificing accuracy.
• Premium HSS-E material – a tough, high-hardness steel alloy that handles a variety of workpiece materials, including steel, aluminium, and stainless steel, with improved wear resistance and heat tolerance.
• High-performance tolerance – engineered to produce high-quality, accurate holes at higher speeds and feeds, delivering H10 hole tolerance for reliable fit and finish.
• DIN/ANSI straight shank, long-series design – compatible with a wide range of toolholding systems and machines, providing versatility for deep-hole and through-hole drilling tasks.

Who benefits from the Dormer Pramet A940 drill? precision machinists, job shops, and production environments where deep, straight holes are routine. It excels in automotive components, general engineering, and assemblies requiring tight tolerances without multiple setups or tool changes.

Use cases and practical advantages

• Deep-hole drilling in steel, aluminium, and stainless steel where a single, clean pass saves cycle time and reduces tool wear.
• Long through-holes in assemblies that demand consistent diameter and straightness from start to finish.
• High-speed machining scenarios where stable flute design and edge retention keep holes round and true at elevated speeds.

For best results, match the drill speed and feed to the material and hole depth, and maintain proper chip evacuation to preserve the H10 tolerance. The A940's robust HSS-E construction and advanced flute geometry are designed to deliver dependable performance across multiple materials, making it a dependable workhorse in your metalworking toolkit.