Dormer Pramet A940 3.90 mm HSS-E HIGH PERF MULT-APP STRAIGHT SHANK LONG SERIES DRILL DIN/ANSI

Meet the Dormer Pramet A940 3.90 mm HSS-E High Performance Multi-Application Straight Shank Long Series Drill (DIN/ANSI) — a precision tool designed to elevate demanding metalworking tasks. Built for reliability, it delivers consistently accurate holes with fewer passes, even when you’re pushing speed and feed rates.

• 130-degree point for effortless entry: this geometry promotes self-centering and reduces the push force required, helping you start holes cleanly in challenging materials.
• Bright finish for smoother cutting: the polished edge minimizes workpiece material from sticking to the cutting edge, improving chip flow and reducing re-cutting.
• Parabolic flute design for deep-hole efficiency: engineered to cut deeper holes in a single pass, cutting cycle time and boosting overall productivity without sacrificing hole quality.
• Premium HSS-E material: cobalt-enriched high-speed steel combines toughness and wear resistance, making it suitable for drilling a wide range of metals, including steel, aluminum, and stainless steel.
• Long-series, straight shank: optimized for extended reach and stable guidance in common drill chucks and collets, reducing deflection and improving hole concentricity.
• High-performance with h10 hole tolerance: delivers precise, high-quality holes even at elevated speeds and feeds, helping minimize secondary finishing operations.
• DIN/ANSI compatibility: designed to fit standard DIN and ANSI tooling interfaces, ensuring broad machine compatibility.

This drill is an ideal choice for shop floors and engineering labs that demand reliability across a variety of metals. Use it for precision pilot holes in steel and stainless steel projects, then advance to deeper holes in aluminum works without changing tools. Its multi-application design means you can rely on a single bit for multiple jobs, reducing tool inventory and setup times while maintaining tight tolerances and clean hole diameters.

Tips for optimal results: pair the A940 with appropriate coolant or cutting fluid to manage heat at higher speeds, confirm the machine’s spindle and chuck can safely handle a 3.90 mm diameter, and start with moderate speed and feed to establish a clean entry before increasing performance. For deep holes, ensure workpiece stability and proper workholding to prevent deflection and maintain hole straightness.