Dormer Pramet A940 2.90 mm HSS-E HIGH PERF MULT-APP STRAIGHT SHANK LONG SERIES DRILL DIN/ANSI

The Dormer Pramet A940 2.90 mm HSS-E High-Performance Multi-Application Straight Shank Long Series Drill is a precision-focused tool designed to deliver dependable, repeatable holes across a range of materials. Built for real-world manufacturing environments, this drill combines targeted geometry with a robust steel-alloy core to keep production moving even at higher speeds.

Key design advantages that matter in daily machining

• 130° point for smooth starting and self-centering — The precise point geometry reduces required starting force and helps the bit bite cleanly on contact, minimizing wandering and maximizing first-pass accuracy.
• Bright finish to reduce material sticking — The polished flute edge resists built-up edge, ensuring consistent cuts and cleaner holes, especially when drilling tricky or gummy workpieces.
• Parabolic flute design for deep-hole capability — Engineered to evacuate chips efficiently, the parabolic flute supports deep hole drilling in a single pass, cutting cycle times and improving hole quality in thick sections.
• Premium HSS-E material for versatile use — Specifically formulated to handle steel, aluminum, and stainless steel with reliable performance, reducing tool changes and increasing uptime in mixed-material environments.
• Long-series, straight-shank for stable guidance — The straight shank fits standard chucks and collets with minimal runout, delivering straight, accurate holes even in longer reaches and challenging workpieces.
• DIN/ANSI compatibility for broad tooling fitment — Designed to meet common standards, ensuring predictable interchangeability with existing tooling sets and holders.
• High-speed, high-feed capability with tight tolerances — Optimized to maintain hole quality at elevated speeds and feeds, producing holes within precise tolerances (H10 when used with appropriate settings) without sacrificing surface finish.

Ideal applications and practical use cases

• Fabrication shops machining through-holes in steel frames, brackets, and structural components where depth and precision matter.
• Automotive and aerospace component manufacturing where clean entrance and exit surfaces, plus consistent hole diameter, are critical.
• Prototyping and low-volume production that demand a reliable, single-tool solution for a range of materials.
• Multi-material projects (steel, aluminum, stainless) where tool inventory benefits from a single, high-performance drill family.

Tips for optimal results:

• Match speeds and feeds to the material: use higher speeds for aluminum with appropriate lubrication, and lean toward steady feeds for steel and stainless to minimize heat buildup.
• Let the parabolic flute evacuate chips freely to prevent clogging and ensure a clean exit
• Use a sharp center punch or pilot and maintain steady, perpendicular entry to preserve hole roundness
• Employ proper coolant or cutting fluid to extend tool life and improve finish on tougher materials