Dormer Pramet A940 7.20 mm HSS-E Long Series Drill is the precision workhorse you reach for when deep, clean holes matter as much as speed. This long-series, straight-shank PFX drill is built to DIN/ANSI standards, delivering consistent performance from first entry to the deepest 10xD hole in steel, stainless steel, or even challenging alloys. The 130° point geometry guides self-centering starts and reduces the push force at entry, helping you avoid wandering on tough workpieces. Key features that differentiate this A940 drill in real-world shop use: - 130° point for self-centering and easier entry, minimizing drift when starting a hole in hard metals. - Parabolic web (flute) design and quick-spiral geometry optimize chip evacuation, enabling extra-deep holes in a single pass and reducing pecking cycles. - Bright finish to minimize built-up edge and prevent workpiece material from sticking to the cutting edge—especially valuable when drilling aluminum and stainless steel. - Premium HSS-E (cobalt-based) alloy for superior wear resistance across a broad material range, including steel, stainless steel, and super-alloys. ready for high-speed, high-feed applications. - Long-series geometry with a straight shank, designed for reliable chuck compatibility and 10xD drilling capability without pecking, ideal for through-holes or deep cavities. - H10 hole tolerance performance at high speeds and feeds, ensuring high-quality, repeatable hole sizes even under demanding production conditions. Who benefits most - Machinists and toolroom technicians solving precision deep-hole challenges in steel, stainless steel, and aluminum components. - Fabrication shops aiming to minimize cycle times on through-holes and reduce tool changes by relying on a single, versatile long-series drill. - Customers needing DIN/ANSI-compliant tooling with a proven long-reach profile for 10xD capabilities in a single pass. Practical notes to maximize performance - Diameter and reach are optimized for 7.20 mm holes with a flute length of about 102 mm and an overall length near 156 mm, giving you substantial reach without sacrificing rigidity. - The combination of HSS-E with a bright finish and a 130° point is specifically chosen to balance wear resistance, self-centering action, and ease of starting the hole across common metals. - Expect high-quality, repeatable holes at higher speeds and feeds (H10 tolerance) when used in appropriate machine setups, with the added benefit of reduced chip buildup thanks to the parabolic flute design. Dimensions at a glance (for quick planning) - Cutting diameter: 7.20 mm - Point angle: 130° - Flute length: ~102 mm - Overall length: ~156 mm - Shank: Straight, DIN/ANSI compatible - Material: HSS-E with bright finish - Performance target: deep-hole drilling up to 10xD in steel, stainless steel, and super-alloys Dormer Pramet’s A940 line is known for combining durability with practical, production-friendly design. If you’re tackling long, deep holes in mixed metals, this drill pair guarantees dependable starts, efficient chip evacuation, and precision results—from the first cut to the last.