Dormer Pramet A940 4.10 mm HSS-E HIGH PERF MULT-APP STRAIGHT SHANK LONG SERIES DRILL DIN/ANSI

Dormer Pramet A940 4.10 mm HSS-E High Performance Multi-Application Straight Shank Long Series Drill, DIN/ANSI is engineered for metalworking precision across a wide range of materials. This compact drill pairs Dormer Pramet’s trusted engineering with advanced HSS-E chemistry to deliver consistently clean, accurate holes with fewer passes and less effort.

• 130° point for self-centering and reduced push force — starts holes with minimal wandering, improving accuracy in thin or challenging materials and lowering operator fatigue.
• Bright finish — minimizes adhesion of workpiece material to the cutting edge, reducing built-up edge and helping maintain a pristine hole diameter even after repeated passes.
• Parabolic flute design — optimized to evacuate chips quickly, enabling deeper holes in a single pass and delivering smoother hole entrances with less vibration and heat buildup.
• Premium HSS-E material — high-speed steel with enhanced wear resistance, stable performance across steel, aluminum, and stainless steel, so you don’t have to switch tools for different metals.
• High-performance with H10 hole tolerance — consistently produces holes meeting tight diameter control, even at higher speeds and feeds, for reliable assembly and reduced rework.
• Long-series straight shank (DIN/ANSI) — designed for universal compatibility with standard drill chucks and collets, providing stable guidance and strong rigidity for long-hole drilling tasks.

This drill is ideal for workshops that require a versatile, single-tool solution for metal drilling. Use it for precision holes in mild steel, stainless steel, and aluminum components, brackets, enclosures, and machine parts. Its combination of a precise 130° point, deep-hole capability, and durable HSS-E construction makes it a practical choice for CNC machines and manual drilling alike, helping you achieve accurate hole placement, clean edges, and repeatable results across multiple jobs.

Compared with general-purpose drills, the A940’s specialized geometry and material make it more resilient under demanding cutting conditions, delivering longer tool life and more consistent hole quality. Its DIN/ANSI compatibility ensures easy replacement and interchangeability in a busy shop environment, reducing downtime when you need to switch to a new drill with minimal setup changes.

Key use scenarios include fabricating frame members, aluminum extrusion work, automotive brackets, and stainless components where precise small-diameter holes are critical. Pair with appropriate coolant and secure clamping to maximize life and minimize chatter. Start with conservative speeds and adjust as material and tool wear dictate to maintain the H10 tolerance and achieve the best surface finish.