The Dormer Pramet A940 6.10 mm HSS-E High Performance Multi-Application Straight Shank Long Series Drill (DIN/ANSI) is a purpose-built tool for precision machining across a range of materials. Designed to deliver accurate holes with consistent surface finish, it’s the go-to choice when you need dependable performance from a single drill in a busy workshop.

Why this drill stands out

• 130-degree point for clean starts — the advanced point geometry promotes quick self-centering and reduces the pushing force needed to begin drilling, resulting in less wandering and smoother hole entry.
• Bright finish for reduced sticking — the polished outer surface minimizes built-up edges and prevents workpiece material from sticking to the cutting edge, enhancing hole quality and reducing downtime for deburring.
• Special parabolic flute design — engineered to evacuate chip effectively, this flute profile supports drilling extra-deep holes in a single pass, improving throughput on deep-hole applications and reducing tool wear.
• Premium HSS-E material — a high-speed steel with extra toughness and wear resistance, suitable for drilling steel, aluminum, and stainless steel without compromising edge retention or accuracy.
• High-performance drill with tight tolerances — engineered for high speeds and feeds while delivering accurate hole sizes (h10 tolerance), making it ideal for precision engineering and die/mold work.
• DIN/ANSI straight shank, long-series reach — standardized shank compatibility ensures reliable seating in collets and chucks, while the longer flute length provides extended reach for deeper holes in metalwork.

Ideal use cases and practical applications

• Machining automotive components, aerospace fixtures, and general metal fabrication where precise, repeatable holes matter.
• Where deep-hole drilling is required in a single pass without needing a separate long drill or pilot hole.
• Projects involving steel, stainless steel, or aluminum that demand clean hole starts, minimal built-up edge, and tight tolerances.
• Environments that rotate between different materials, benefiting from a single versatile drill that maintains performance across metals.

How to get the best results

• Match speeds and feeds to material type and thickness; start with conservative parameters and increase gradually to maintain edge integrity.
• Use light to moderate lubrication or coolant to control heat buildup, especially on stainless steel and aluminum workpieces.
• Secure the workpiece firmly to prevent deflection during entry, and support long workpieces to preserve hole accuracy in deeper drilling tasks.
• Inspect the cutting edge and flute alignment regularly in high-cycle production to maintain consistent hole geometry and surface finish.

Diameter: 6.10 mm — Series: Long, straight shank — Material: HSS-E — Tolerance: h10 — Standards: DIN/ANSI