Dormer Pramet A940 1.10 mm HSS-E HIGH PERF MULT-APP STRAIGHT SHANK LONG SERIES DRILL DIN/ANSI

Dormer Pramet A940 1.10 mm HSS-E Long Series Drill is a purpose-built, high-performance tool for makers who demand reliable deep-hole precision across multiple materials. With a compact 1.10 mm cutting diameter, this straight-shank PFX drill is optimized for tight-tolerance work and tight chucks, making it a versatile choice in micro-machining and intricate fabrication tasks. Designed for depth without pecking, the A940 Long Series features a parabolic flute and a quick, efficient flute geometry that creates generous chip space while guiding chips away from the cutting edge. This enables drilling extra-deep holes in a single pass, reducing cycle times and increasing overall productivity in steel, stainless steel, and even alloys where heat build-up is a concern. Key benefits you’ll feel on the shop floor: - 130° point angle for confident starts: the geometry helps the bit self-center on entry, minimizing wandering and lowering the push force required to begin a hole. This is especially valuable when working with small-diameter holes where precision matters most. - Bright finish for cleaner starts and reduced material buildup: the bright surface helps resist adhesion, so the workpiece material is less likely to smear onto the cutting edge during aggressive feeds. - Parabolic flute design and parabolic web: optimized chip evacuation and more room for debris, which supports smoother drilling at higher speeds and feeds. Ideal for long-hole precision in a single pass. - Premium HSS-E cobalt composition: a cobalt-infused high-speed steel formulation that enhances hardness and heat resistance, extending life when drilling tough steels, aluminum, and stainless steels. This makes the A940 suitable for a wide range of materials without swapping tools. - Tight hole tolerances in demanding applications: designed to deliver high-quality, accurate holes with H10 tolerance, even at elevated speeds and feeds. It’s the kind of reliability you notice in finished parts and gauge measurements. - Long-series, DIN/ANSI compatibility with straight shank: built to fit standard machine ops and tooling libraries that require a straight-shank, long-depth drill for multi-application use. Who this is for and use cases: - Ideal for machinists and fabrication shops needing a single, multipurpose drill that can handle automotive components, electronics enclosures, precision jigs, and small-diameter features where depth and accuracy matter. - Great for engineers who value reduced cycle times thanks to deep-hole capability in one pass, even when drilling stainless steel or thin-walled aluminum parts. - A reliable choice when you’re balancing speed, depth, and hole quality without changing tools mid-process. Practical tips to get the most from the A940: - Start with a conservative speed and feed, then ramp up as you monitor chip formation and edge wear. The parabolic flute helps with chip removal, but effective cooling and lubrication will still extend tool life. - Use appropriate coolant or cutting fluid for the material you’re drilling to maintain edge integrity, especially in stainless steels and aluminum alloys. - Keep the drill sharp and retighten the shank if needed to maintain concentricity and hole accuracy, particularly for long-hole drilling tasks. This long-series A940 drill is a robust, multi-material solution that pairs precision with depth capability, reducing tool changes and enabling consistent hole quality across a range of common machining materials. For applications that demand dependable performance at smaller diameters and deeper holes, the A940 delivers measurable productivity and part accuracy.