Dormer Pramet A940 3.80 mm HSS-E HIGH PERF MULT-APP STRAIGHT SHANK LONG SERIES DRILL DIN/ANSI

Dormer Pramet A940 3.80 mm HSS-E Long Series Drill, DIN/ANSI is a precision-forged, high-performance PFX drill designed for deep-hole work across a range of metals. Built to deliver accurate, repeatable holes at high speeds and feeds, this long-series, straight-shank drill is a reliable workhorse for professional machinists and fabricators alike.

• 130° point for self-centering and reduced push force. The geometry guides the drill into the workpiece with minimal wandering, helping you start holes cleanly and finish with true alignment.
• Bright finish enhances chip flow and prevents material sticking to the cutting edge. A smooth, polished surface reduces built-up edge and supports consistent performance over longer tool life.
• Parabolic flute design enables extra-deep drilling in a single pass. This characteristic supports drilling deep holes (10×D usability in many applications) without frequent pecking, boosting throughput on challenging jobs.
• Premium HSS-E material for versatile metalworking. Ideal for steel, aluminum, stainless steel and other common alloys, delivering dependable tool life and consistent hole quality.
• Long-series, straight-shank design with DIN/ANSI compliance. Designed to fit standard chucks and holders, offering extended reach for through-holes and hard-to-access features.
• High-performance, high-tinish tolerance (H10) drilling capability. Engineered to produce accurate holes with tight tolerances even at higher speeds and feeds, reducing the need for rework.
• Multi-application versatility. While optimized for deep steel and alloy drilling, this A940 drill also handles stainless steel and non-ferrous workpieces where reliable hole quality matters. No coolant channel means clean, compact chip evacuation in appropriate setups.

Who benefits most from the A940 3.80 mm drill? shops and shops-with-batches that run small-diameter, high-precision holes in production or prototype environments. It’s especially well-suited for fabricators and engineers who need consistent hole quality in metals like steel and stainless steel, while also handling aluminum where chip control and edge wear matter. The combination of a true 130° point, parabolic flute, and HSS-E composition makes this drill a reliable choice for deep-hole tasks that previously required multiple passes or pecking cycles.

Practical tips to maximize performance with the A940 3.80 mm:

• Set appropriate speeds and feeds to match the material and depth; the drill’s design supports high-speed operation with clean chip evacuation.
• Center-punch the workpiece to leverage the self-centering 130° point for accurate starting holes.
• For stainless and hard alloys, use adequate clamping and consider dry-cut or water-soluble coolant depending on your setup and machine capabilities.
• Use the full 10×D usability when the application calls for deep-hole drilling, but plan occasional pecking if your setup requires it to maintain chip clearance.