Meet the Dormer Pramet A940 8.50 mm HSS-E Long Series drill—built for precision, depth, and dependable performance in a single-pass operation. This long-series, straight-shank PFX drill is engineered to deliver clean, accurate holes in a range of materials while minimizing setup time and tool wear.

Why the A940 stands out

• 130° point angle for confident starts and reduced push force — the self-centering tip helps anchor the drill at the exact location you want, cutting wandering when starting a hole and easing initial penetration into tough substrates. This feature is a core reason why users experience smoother starts and more consistent hole placement.
• Parabolic flute design for deep-hole capability — the distinctive parabolic web creates extra chip room and efficient evacuation, enabling deeper holes in a single pass and reducing the need for pecking. This is especially valuable when drilling into thicker sections or through materials with challenging chip buildup.
• HSS-E cobalt-based steel with bright finish — the cobalt-enriched substrate provides enhanced wear resistance for demanding metals, while the bright finish helps minimize material sticking at the cutting edge and promotes smoother chip flow. This combination supports longevity and cleaner entry in steel, stainless steel, and aluminum.
• Long-series, straight-shank design — the extended flute and overall length (for an 8.50 mm diameter) give you reach and rigidity in tapped or blind-hole applications, aligning with DIN/ANSI standards for dependable interchangeability in machine operations.
• Rigid performance at high speeds and feeds with tight tolerances — engineered for precision and consistency, the A940 delivers high-quality, accurate holes even at elevated speeds, with hole tolerance in the H10 range typical for premium long-series drills.
• 10xD drilling capability without pecking — designed to drill deeply in steel, stainless steel, and similar alloys with minimal interruptions, maximizing productive time in repetitive or batch-hole scenarios.

Designed for professionals who demand reliable performance across a variety of production environments, the A940 is an excellent choice for automotive, aerospace, general engineering, and fabrication shops that need deep, precise holes without constant retooling or tool changes. The 8.50 mm diameter stabilizes hole size control in mid-range applications, while the long-series geometry expands your reach where shorter drills struggle.

Who benefits most

• Machinists tackling thick plates or deep pockets where consistent hole depth matters.
• Shop floors running high-speed drilling cycles on steel, stainless steel, or aluminum components.
• Facilities requiring durable tools with DIN/ANSI compatibility for wide machine compatibility.

In practice, the A940 excels when you need a trustworthy drill that starts cleanly, clears chips efficiently, and maintains hole quality from the first pass to the final depth. Its 130° point, parabolic flute, and HSS-E composition combine to reduce downtime, extend tool life, and improve overall hole quality—making it a standout choice in the Dormer Pramet long-series family.