Dormer Pramet A940 8.60 mm HSS-E HIGH PERF MULT-APP STRAIGHT SHANK LONG SERIES DRILL DIN/ANSI

Meet the Dormer Pramet A9408.6 — a premium 8.60 mm HSS-E long-series drill engineered for multi‑material precision and deep-hole capability. Built to tackle demanding jobs in steel, stainless steel, aluminum, and hard alloys, this DIN/ANSI straight‑shank drill delivers consistent hole quality at higher speeds and feeds in a single, efficient pass.

Why this drill stands out

• 130° self‑centering point reduces walking and minimizes thrust, ensuring clean starts even on challenging or thin‑walled workpieces.
• Bright finish and a smooth cutting edge resist built‑up edge and sticking, helping chips flow freely and extending tool life in stainless and alloy steels.
• Parabolic flute design creates extra chip space and a stable cutting action, enabling deeper holes in a single pass and improving reliability on long reach operations.
• Premium HSS‑E (cobalt‑based) material delivers enhanced heat resistance and toughness, suitable for drilling a wide range of materials including steel, aluminum, stainless steel, and high‑strength alloys.
• Long‑series, straight‑shank format adheres to DIN/ANSI standards, providing compatibility with standard chucks and toolholding while offering extended reach for deeper holes.
• High‑quality hole tolerance supports precise assembly with h10 accuracy, making it ideal for components that demand tight dimensional control.

Ideal use cases

Perfect for fabrication shops, machine shops, and OEM environments where reliable deep drilling matters. Use the A9408.6 for:

• Deep holes in steel, stainless steel, and high‑strength alloys without frequent pecking.
• Multi‑material projects that combine steel frames with aluminum housings or stainless fasteners.
• Automotive fixtures, hydraulic manifolds, prototype builds, and light aerospace components where precision and reach are crucial.

Practical advantage over standard drills

• The 130° point and self‑centering geometry cut start‑up effort and improve hole alignment, saving time during setup and reducing rework.
• The parabolic flute and generous flute length optimize chip evacuation, especially in longer holes and high‑speed scenarios, reducing built‑up edge and heat buildup.
• The combination of HSS‑E cobalt and bright finish extends tool life under demanding cutting conditions, delivering stable, repeatable hole quality across materials.
• Long reach with a robust straight shank provides versatile compatibility with standard drilling equipment while enabling deeper drilling without changing tools.

Tips for best results

To maximize performance with the A9408.6, maintain appropriate speeds and feeds for your material, use a compatible cutting fluid, and secure the workpiece to minimize deflection. For deep-hole work, rely on the parabolic design to maintain consistent chip clearance and steady cutting action, ensuring you achieve clean, accurate holes with minimal vibration.